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JP2004228532A - I / O terminal and semiconductor element storage package and semiconductor device - Google Patents

I / O terminal and semiconductor element storage package and semiconductor device Download PDF

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Publication number
JP2004228532A
JP2004228532A JP2003018002A JP2003018002A JP2004228532A JP 2004228532 A JP2004228532 A JP 2004228532A JP 2003018002 A JP2003018002 A JP 2003018002A JP 2003018002 A JP2003018002 A JP 2003018002A JP 2004228532 A JP2004228532 A JP 2004228532A
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line conductor
lead terminal
input
joined
semiconductor element
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JP2003018002A
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Japanese (ja)
Inventor
Toshiya Tanaka
利弥 田中
Koichi Kashiwagi
弘一 柏木
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Kyocera Corp
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Kyocera Corp
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Abstract

【課題】半導体素子と外部電気回路基板との間の高周波信号の伝送効率を向上させ、量産性に優れた半導体素子収納用パッケージとすることのできる入出力端子を提供すること。
【解決手段】入出力端子8は、上面に一辺から対向する他辺にかけて形成された線路導体3および下面に下部接地導体2を有する誘電体から成る四角平板状の平板部1と、この平板部1の上面に線路導体3の一部を間に挟んで接合された、上面に上部接地導体6が形成された誘電体から成る直方体状の立壁部5とを具備し、線路導体3の露出した一端部にリード端子4が接合される入出力端子8において、平板部1は、リード端子が接合される側の露出した上面で線路導体3のリード端子4が接合される部位を除いた部位に、リード端子4の線路導体3との接合部を囲む切欠き部を有する誘電体板11が接合されている。
【選択図】 図1
Provided is an input / output terminal capable of improving the transmission efficiency of a high-frequency signal between a semiconductor element and an external electric circuit board, and providing a semiconductor element housing package excellent in mass productivity.
An input / output terminal (8) has a rectangular flat plate portion (1) made of a dielectric having a line conductor (3) formed on one surface from the other side to the opposite side and a lower ground conductor (2) on the lower surface; And a rectangular parallelepiped standing wall portion 5 made of a dielectric having an upper grounding conductor 6 formed on the upper surface thereof and joined to the upper surface of the line conductor 3 with a part of the line conductor 3 interposed therebetween. In the input / output terminal 8 to which the lead terminal 4 is joined to one end, the flat plate portion 1 is located on the exposed upper surface on the side where the lead terminal is joined, except for the portion where the lead terminal 4 of the line conductor 3 is joined. A dielectric plate 11 having a notch surrounding the joint between the lead terminal 4 and the line conductor 3 is joined.
[Selection diagram] Fig. 1

Description

【0001】
【発明の属する技術分野】
本発明は、高周波信号で作動する半導体素子を収納するための半導体素子収納用パッケージの信号入出力部に使用される入出力端子および半導体素子収納用パッケージならびに半導体装置に関する。
【0002】
【従来の技術】
従来、マイクロ波帯やミリ波帯等の高周波信号を用いる半導体素子を収納するための半導体素子収納用パッケージ(以下、パッケージともいう)には、半導体素子と外部電気回路基板とを電気的に接続するための入出力端子が設けられている。この入出力端子を図6に斜視図で示す。
【0003】
同図において、101はアルミナ(Al)質焼結体,窒化アルミニウム(AlN)質焼結体,ムライト(3Al・2SiO)質焼結体等の誘電体から成る四角平板状の平板部であり、平板部101はその上面に、一辺から対向する他辺にかけて形成され、タングステン(W),モリブデン(Mo)等のメタライズ層から成る線路導体103が形成され、線路導体103の一端に鉄(Fe)−ニッケル(Ni)−コバルト(Co)合金やFe−Ni合金等から成るリード端子104が銀(Ag)ろう等の導電性接着材を介して接合される。また、平板部101の下面には、その全面に線路導体103と同様のメタライズ層から成る下部接地導体102を有する。
【0004】
また、平板部101の上面には、線路導体103の一部を間に挟んで接合されるとともに、上面に上部接地導体106を有するAl質焼結体,AlN質焼結体,3Al・2SiO質焼結等の誘電体から成る直方体状の立壁部105が設置される。そのため、線路導体103は、平板部101と立壁部105とに狭持されていない部位のマイクロストリップ線路と、平板部101と立壁部105とに狭持される部位のストリップ線路とから成る。平板部101と立壁部105の線路導体103の線路方向に略平行な側面には線路導体103と同様のメタライズ層から成る側面接地導体107が形成されている(例えば、下記の特許文献1参照)。
【0005】
このように、入出力端子108は、平板部101と立壁部105とから構成され、パッケージに設けられることによりパッケージ内外を気密に遮断し、その内部を封止している。
【0006】
このような入出力端子108は、上面の中央部に半導体素子が載置される載置部を有する基体と、この基体の上面に載置部を囲繞するように取着され、側部に貫通孔または切欠きから成る入出力端子108の取付部が形成された枠体とから成るパッケージにおいて、枠体が金属製である場合(メタルウォールタイプ)は取付部に嵌着されることにより、または枠体がセラミックス製である場合(セラミックウォールタイプ)は、上記の入出力端子108と枠体とが一体的に形成されることにより、内部に収容する半導体素子と外部電気回路基板との間で入出力される信号の伝送線路として機能する。
【0007】
【特許文献1】
特開2002−100693号公報
【0008】
【発明が解決しようとする課題】
しかしながら、上記従来の入出力端子108では、線路導体103を伝送する高周波信号の周波数が高周波になるにつれ、線路導体103とリード端子104とのわずかな接合位置のずれによってインピーダンスの整合性が低下し、線路導体103とリード端子104との接合部を伝送する高周波信号に反射損失等の伝送損失が発生し易くなり、その結果、この接合部を伝送する高周波信号の伝送効率が低下して所望の伝送特性が得られ難くなり、パッケージの製造歩留まりが低下するという問題点があった。
【0009】
従って、本発明は上記問題点に鑑み完成されたものであり、その目的は、半導体素子収納用パッケージに収容した半導体素子に高周波信号を伝送させる入出力端子の線路導体とリード端子との接合部で高周波信号の伝送損失が生ずるのを抑制することにより、半導体素子と外部電気回路基板との間の高周波信号の伝送効率を向上させ、量産性に優れた半導体素子収納用パッケージとすることのできる入出力端子、およびこれを用いた高周波信号の伝送効率および量産性に優れた半導体素子収納用パッケージならびに半導体装置を提供することにある。
【0010】
【課題を解決するための手段】
本発明の入出力端子は、上面に一辺から対向する他辺にかけて形成された線路導体および下面に下部接地導体を有する誘電体から成る四角平板状の平板部と、該平板部の上面に前記線路導体の一部を間に挟んで接合された、上面に上部接地導体が形成された誘電体から成る直方体状の立壁部とを具備し、前記線路導体の露出した一端部にリード端子が接合される入出力端子において、前記平板部は、前記リード端子が接合される側の露出した上面で前記線路導体の前記リード端子が接合される部位を除いた部位に、前記リード端子の前記線路導体との接合部を囲む切欠き部を有する誘電体板が接合されていることを特徴とする。
【0011】
本発明の入出力端子は、平板部の上面で線路導体のリード端子が接合される部位を除いた部位に、リード端子の線路導体との接合部を囲む切欠き部を有する誘電体板が接合されていることから、誘電体板の切欠き部にリード端子を嵌め込むことによりリード端子と線路導体とをインピーダンスの整合性を低下させることなく位置精度よく接合することができ、その結果、リード端子と線路導体との接合部を伝送する高周波信号に反射損失等の伝送損失が発生するのを有効に抑制することができる。
【0012】
また、誘電体板の切欠き部がリード端子と線路導体とを接合するAgろう等の導電性接着材の流出を防止することができるため、リード端子の一方の側面から端面を経て他方の側面にわたって連続した導電性接着材のなだらかなメニスカスを形成することが可能となり、リード端子と線路導体との接合強度を向上させることができる。
【0013】
本発明の半導体素子収納用パッケージは、上面の中央部に半導体素子が載置される載置部を有する基体と、該基体の上面に前記載置部を囲繞するように取着され、側部に貫通孔または切欠きから成る入出力端子の取付部が形成された枠体と、前記取付部に嵌着された上記本発明の入出力端子とを具備していることを特徴とする。
【0014】
本発明の半導体素子収納用パッケージは、上記の構成により、半導体素子と外部電気回路基板との間の高周波信号の伝送効率の優れたものとなる。そして、所望の伝送特性を有する半導体素子収納用パッケージを高い歩留まりで作製することが可能となり、量産性に優れるものとすることができる。
【0015】
本発明の半導体装置は、上記本発明の半導体素子収納用パッケージと、前記載置部に載置固定されるとともに前記入出力端子に電気的に接続された半導体素子と、前記誘電体板の前記切欠き部の内側の前記線路導体に接合されたリード端子と、前記枠体の上面に取着された蓋体とを具備していることを特徴とする。
【0016】
本発明の半導体装置は、上記の構成により、上記本発明の半導体素子収納用パッケージを用いた高周波信号の伝送効率にすぐれ、量産性に優れたものとなる。
【0017】
【発明の実施の形態】
本発明の入出力端子および半導体素子収納用パッケージならびに半導体装置について以下に詳細に説明する。図1は本発明の入出力端子について実施の形態の一例を示す斜視図である。同図において、1は平板部、2は下部接地導体、3は線路導体、5は立壁部、6は上部接地導体、8は入出力端子、11は誘電体板である。
【0018】
本発明の入出力端子8は、上面に一辺から対向する他辺にかけて形成された線路導体3および下面に下部接地導体2を有する誘電体から成る四角平板状の平板部1と、この平板部1の上面に線路導体3の一部を間に挟んで接合された、上面に上部接地導体6が形成された誘電体から成る直方体状の立壁部5とを具備している。
【0019】
平板部1は、Al質焼結体,AlN質焼結体,3Al・2SiO質焼結体等の誘電体からなる四角平板状のものである。
【0020】
線路導体3は、平板部1の上面に一辺から対向する他辺にかけて形成されたW,Mo等のメタライズ層から成り、一端にFe−Ni−Co合金やFe−Ni合金等の金属から成るリード端子4がAgろう等の導電性接着材を介して接続される。
【0021】
立壁部5は、Al質焼結体,AlN質焼結体,3Al・2SiO質焼結体等の誘電体からなる直方体状のものであり、平板部1の上面に、間に線路導体3の一部を挟んで接合されている。
【0022】
また、平板部1の下面および立壁部5の上面にはそれぞれ全面に線路導体3と同様のメタライズ層から成る下部接地導体2および上部接地導体6を有する。さらに、平板部1の側面および立壁部5の側面には線路導体3と同様のメタライズ層から成る側面接地導体7が形成されている。これらの下部接地導体2、上部接地導体6および側面接地導体7により、線路導体3に対する接地が強化され、線路導体3の高周波信号の伝送効率に優れたものとなる。
【0023】
また、本発明の平板部1は、その上面で線路導体3のリード端子4が接合される部位を除いた部位に、リード端子4の線路導体3との接合部(以下、単に接合部という場合は、リード端子4と線路導体3との接合部をいう)を囲む切欠き部を有する誘電体板11が接合されている。
【0024】
この構成により、誘電体板11の切欠き部にリード端子4を嵌め込むことによりリード端子4と線路導体3とをインピーダンスの整合性を低下させることなく位置精度よく接合することができ、その結果、リード端子4と線路導体3との接合部を伝送する高周波信号に反射損失等の伝送損失が発生するのを有効に抑制することができる。また、誘電体板11の切欠き部がリード端子4と線路導体3とを接合するAgろう等の導電性接着材の流出を防止することができるため、リード端子4の一方の側面から端面を経て他方の側面にわたって連続した導電性接着材のなだらかなメニスカスを形成することが可能となり、リード端子4と線路導体3との接合強度を向上させることができる。
【0025】
このような入出力端子8は以下のようにして作製される。例えば、Al質焼結体(アルミナ質セラミックス)から成る場合、先ず酸化アルミニウム、酸化珪素(SiO)、酸化マグネシウム(MgO)および酸化カルシウム(CaO)等の原料粉末に適当な有機バインダー、可塑剤、溶剤等を添加混合して泥漿状と成す。これを従来周知のドクターブレード法やカレンダーロール法等のテープ成形技術により複数のセラミックグリーンシートを得る。
【0026】
次に、このセラミックグリーンシートに、W,Mo等の高融点金属粉末に適当な有機バインダー、可塑剤、溶剤等を添加混合して得た金属ペーストを、スクリーン印刷法等の厚膜形成技術により印刷塗布して、下部接地導体2、線路導体3、上部接地導体6となるメタライズ層を所定パターンに形成する。その後、セラミックグリーンシートを複数枚積層し、側面接地導体7となるW,Mo等の高融点金属粉末に適当な有機バインダー、可塑剤、溶剤等を添加混合して得た金属ペーストを塗布した後、これを還元雰囲気中、約1600℃の温度で焼成することにより製作される。
【0027】
誘電体板11の切欠き部は、上記セラミックグリーンシートの一部に打ち抜き加工等の方法により切欠きを形成することにより作製できる。この切欠きを有する誘電体板11となるセラミックグリーンシートは、立壁部5を構成するセラミックグリーンシート積層体の最も下側(平板部1側)のシートと一体となったシートとして形成されるのがよい。これにより、セラミックグリーンシートの積層回数を減らすことによって入出力端子8を効率よく形成することができる。
【0028】
誘電体板11の切欠き部は、図2に拡大上面図で示すように、リード端子4と誘電体板11との間の距離Xが、0.03乃至0.15mmであるのがよい。この構成により、リード端子4を線路導体3上にインピーダンスの整合性を低下させることなく位置精度よく接合することができ、接合部を伝送する高周波信号に反射損失等の伝送損失が発生するのを有効に抑制することができる。また、誘電体板11の切欠き部がリード端子4と線路導体3とを接合するAgろう等の導電性接着材の流出を防止することができるため、リード端子4の一方の側面から端面を経て他方の側面にわたって連続した導電性接着材のなだらかなメニスカスを形成することが可能となり、リード端子4と線路導体3との接合強度を向上させることができる。
【0029】
X<0.03mmの場合、リード端子4と誘電体板11との間の距離が非常に近接し、接合部の周囲に導電性接着材の良好なメニスカスを形成するのが困難になり、リード端子4を線路導体3に強固に接合するのが困難になる。またX>0.15mmの場合、誘電体板11の切欠き部の幅がリード端子4の幅に比べて大きすぎ、線路導体3に対してリード端子4がずれ易くなり、接合部を伝送する高周波信号に発生する反射損失等の伝送損失が大きくなリ易い。
【0030】
また、誘電体板11は、図3に拡大断面図で示すように、高さYがリード端子4の厚みtに対して、t/2乃至2tであるのがよい。この構成により、リード端子4と線路導体3との接合部を伝送する高周波信号を効率よく伝送させることができる。
【0031】
Y<t/2の場合、リード端子4の厚みに対して誘電体板11の高さが低く成りすぎ、リード端子4を線路導体3に導電性接着材によって接合する際に、リード端子4が誘電体板11に乗り上がって線路導体3に対する位置がずれた状態で接合され易くなる。また、Y>2tの場合、リード端子4の接合部の周囲が誘電体板11からなる誘電体の壁で囲まれることとなり、この誘電体板11で囲まれる部分と囲まれていない部分とでリード端子4を伝送する高周波信号から下部接地導体2へ向けて発生する電界の分布が異なるものとなって、リード端子4を伝送する高周波信号に反射損失等の伝送損失が発生し易くなる。
【0032】
より好ましくは、Yを0.8t乃至1.2tとするのがよい。これにより、リード端子4上面から下部接地導体2に向けて発生する電界の分布を、線路導体3から下部接地導体2に向けて発生する電界の分布と略同じとすることができ、接合部におけるインピーダンスを整合させ線路導体3を伝送する高周波信号に伝送損失が発生するのをより有効に抑制できる。
【0033】
また、接合部を囲むように形成された誘電体板11の幅Wは、0.2mm以上であるのがよい。0.2mm未満であると、誘電体板11の強度が弱くなりリード端子4を位置合わせする際に破損し易くなる。
【0034】
好ましくは、誘電体板11はリード端子4が接合される部位を除いた線路導体3の表面を覆うように形成されているのがよい。この場合、誘電体板11と立壁部5とは同じ誘電体であるため、立壁部5に覆われる線路導体4と誘電体板11で覆われる線路導体4との電界分布がより近いものとなり、高周波信号の伝送損失をより小さくすることができる。
【0035】
さらに、誘電体板11は、図1に示すように接合部側の平板部1上面のリード端子4との接合部を除くほぼ全面にわたって形成されているのがよい。これにより、立壁部5の構成と同様に、誘電体板11の側面にも側面接地導体7を形成して線路導体3の接地をより強化することができ、インピーダンスの整合性をより向上させて高周波信号の伝送効率をより向上させることができる。
【0036】
次に、本発明のパッケージについて図4に基づいて説明する。同図は本発明のパッケージについて実施の形態の一例を示す斜視図であり、21は基体、22は枠体、23は取付部である。
【0037】
本発明のパッケージは、上面の中央部に半導体素子25が載置される載置部21aを有する基体21と、この基体21の上面に載置部21aを囲繞するように取着され、側部に貫通孔または切欠きから成る入出力端子8の取付部23が形成された枠体22と、取付部23に嵌着された入出力端子8とを具備している。
【0038】
これにより、半導体素子25と外部電気回路基板との間の高周波信号の伝送効率の優れたものとなる。そして、所望の伝送特性を有するパッケージを高い歩留まりで作製することが可能となり、量産性に優れるものとすることができる。
【0039】
基体21は、上面にIC,LSI,半導体レーザ(LD),フォトダイオード(PD)等の半導体素子25を載置するための載置部21aを有している。図4では載置部21aを凹部とした例を示したが、基体21の上面を平坦にしてその上面に載置部21aを形成してもよい。
【0040】
基体21は、Fe−Ni−Co合金,銅(Cu)−タングステン(W)合金等の金属、またはAl質焼結体,AlN質焼結体,3Al・2SiO質焼結体等の誘電体からなる。基体21が金属からなる場合、そのインゴットに圧延加工や打ち抜き加工等の従来周知の金属加工法を施すことによって所定形状に製作される。一方、基体21がセラミックスから成る場合、その原料粉末に適当な有機バインダや溶剤等を添加混合しペースト状と成し、このペーストをドクターブレード法やカレンダーロール法等によってセラミックグリーンシートと成し、しかる後、セラミックグリーンシートに適当な打ち抜き加工を施し、これを複数枚積層し約1600℃の高温で焼成することによって作製される。
【0041】
なお、基体21が金属からなる場合、その表面に耐蝕性に優れ、かつろう材との濡れ性に優れる金属、具体的には厚さ0.5〜9μmのNi層と厚さ0.5〜5μmの金(Au)層とを順次めっき法により被着させておくのがよい。これにより、基体21が酸化腐蝕するのを有効に防止できるとともに、基体21上面の載置部21aに半導体素子25を強固に接着固定させることができる。一方、基体21がセラミックスから成る場合、載置部21aに、W,Mo等のメタライズ層を下地層として形成し、この表面に耐蝕性に優れ、かつろう材との濡れ性に優れる金属、具体的には厚さ0.5〜9μmのNi層と厚さ0.5〜5μmのAu層とを順次めっき法により被着させておくのがよい。これにより、載置部21aに半導体素子25を強固に接着固定することができる。
【0042】
枠体22は、基体21上に載置部21aを囲繞するようにAgろう、Ag−Cuろう材等の高融点金属ろう材により接合されており、基体21と同様に誘電体または金属から成る。また、枠体22の側部には、貫通孔または切欠きから成る入出力端子8の取付部23が形成されている。なお、図4に示すように、基体21にも同様の切欠きを設けて入出力端子8の取付部23の一部が形成されていてもよい。
【0043】
取付部23は、枠体22および基体21が誘電体からなる場合、内面にメタライズ層等の導電層が形成されている。この導電層は、基体21および/または枠体22に被着形成された接地導体に接続されて接地されている。
【0044】
取付部23には本発明の入出力端子8がAgろう、Ag−Cuろう材等の高融点金属ろう材により嵌着接合されている。そして、入出力端子8の下部接地導体2、上部接地導体6および側面接地導体7は、枠体22および基体21が誘電体からなる場合、取付部23の内面に形成された導電層に接続されることにより接地され、ケースグランドとなる。あるいは、枠体22および基体21が金属からなる場合、入出力端子8の下部接地導体2、上部接地導体6および側面接地導体7は、金属製の枠体22や基体21に接続されて接地され、ケースグランドとなる。また、入出力端子8の上部接地導体6は、図4に示すように枠体22の上面に取着されるFe−Ni−Co合金等の金属からなるシールリング24に接続されて接地され、ケースグランドとなっていてもよい。
【0045】
なお、枠体22が誘電体から成る場合、入出力端子8は枠体22の一部として一体的に成形されてもよい。
【0046】
このような本発明のパッケージは、入出力端子8を具備していることから、高周波信号の誘電体損失を最小限に抑えて高周波信号の伝送損失を小さくした、良好な伝送特性を有するものとなる。
【0047】
そして、このようなパッケージの載置部21aに半導体素子25を載置した後、半導体素子25の電極と線路導体3とをボンディングワイヤ等の接続手段(図示せず)を介して接続し、誘電体板11の切欠き部内部の線路導体3にFe−Ni−Co合金等の金属からなるリード端子4をAgろうなどの導電性接着材を介して接合して、半導体素子25と外部電気回路基板とを電気的に接続する。次に、必要に応じて枠体22の上面にシールリング24を鉛(Pb)−錫(Sn)半田やAu−Sn半田等の低融点金属ろう材やAg−Cuろう材等の高融点金属ろう材等により取着し、シールリング24の上面にFe−Ni−Co合金等から成る蓋体26を半田付けやシームウエルド法等により取着することにより、半導体素子25がパッケージ内部に収納された製品としての半導体装置となる。
【0048】
また、図4の実施の形態では枠体22の対向する側部に入出力端子8を2つ設けているが、必要に応じて他の側部に設けてもよく、または1つの側部に複数の入出力端子8を取り付けてもよく、この場合取付部23を1つの側部に複数設けて入出力端子8を並列的に複数取り付ければよい。
【0049】
このような本発明の半導体装置は、上記本発明の入出力端子8を具備していることから、高周波信号の誘電体損失を最小限に抑えて高周波信号の伝送損失を小さくし、伝送効率を良好に保持することができる。
【0050】
【実施例】
本発明の入出力端子の実施例を以下に説明する。
【0051】
図1の入出力端子8を以下のように作製した。Al質焼結体から成る四角平板状の平板部1の上面にWのメタライズ層から成る線路導体3を、下面にWのメタライズ層から成る下部接地導体2を設けた。また、平板部1の上面に、Wのメタライズ層から成る上部接地導体6を有したAl質焼結体から成る直方体状の立壁部5を、線路導体3の一部を間に挟んでろう付けした。平板部1および立壁部5の線路方向に平行な両側面には線路導体3と同様のメタライズ層から成る側面接地導体7を設け、平板部1上面のリード端子4の線路導体3との接合部を除く全面に立壁部5と同様のAlセラミックスから成る誘電体板11を設けることにより、入出力端子8を製作した。そして、線路導体3の一端にFe−Ni−Co合金から成るリード端子4をAgろうを介して接合することにより、サンプルAを作製した。
【0052】
サンプルAにおいて、リード端子4は幅0.4mm、厚みtが0.2mmであり、図2でX=0.03mm,図3でY=0.2mmとした。
【0053】
また、比較例として、平板部1上面に誘電体板11を設けていないものを上記実施例と同様に作製し、これをサンプルBとした。
【0054】
そして、サンプルA,Bについて、線路導体3とリード端子4との間に1〜25GHzの高周波信号を入力してその反射損失を測定した。その結果を図5に示す。図5より、比較例としての誘電体板11のないサンプルBは1〜25GHzの全周波数帯域で反射損失が大きくなっていることが判った。また、サンプルBにおいて、リード端子4は線路導体3の所定の位置から線路方向に0.2mm、線路方向と垂直な方向に0.2mmそれぞれずれて接合されていたことが判った。
【0055】
これに対し、本発明の入出力端子8であるサンプルAは、特に、13GHz以上のより高周波の帯域で反射損失が低減されており、より大容量の情報を高速で処理する半導体装置に対して有効なものであることが判った。また、リード端子4の線路導体3の所定の位置からのずれはなく、位置精度よくリード端子4が接合されていることが判った。
【0056】
なお、本発明は上記実施の形態および実施例に限定されるものではなく、本発明の要旨を逸脱しない範囲内であれば種々の変更を施すことは何等差し支えない。
【0057】
【発明の効果】
本発明の入出力端子は、上面に一辺から対向する他辺にかけて形成された線路導体および下面に下部接地導体を有する誘電体から成る四角平板状の平板部と、この平板部の上面に線路導体の一部を間に挟んで接合された、上面に上部接地導体が形成された誘電体から成る直方体状の立壁部とを具備し、線路導体の露出した一端部にリード端子が接合される入出力端子において、平板部は、リード端子が接合される側の露出した上面で線路導体のリード端子が接合される部位を除いた部位に、リード端子の線路導体との接合部を囲む切欠き部を有する誘電体板が接合されていることから、誘電体板の切欠き部にリード端子を嵌め込むことによりリード端子と線路導体とをインピーダンスの整合性を低下させることなく位置精度よく接合することができ、その結果、リード端子と線路導体との接合部を伝送する高周波信号に反射損失等の伝送損失が発生するのを有効に抑制することができる。
【0058】
また、誘電体板の切欠き部がリード端子と線路導体とを接合するAgろう等の導電性接着材の流出を防止することができるため、リード端子の一方の側面から端面を経て他方の側面にわたって連続した導電性接着材のなだらかなメニスカスを形成することが可能となり、リード端子と線路導体との接合強度を向上させることができる。
【0059】
本発明の半導体素子収納用パッケージは、上面の中央部に半導体素子が載置される載置部を有する基体と、この基体の上面に載置部を囲繞するように取着され、側部に貫通孔または切欠きから成る入出力端子の取付部が形成された枠体と、取付部に嵌着された上記本発明の入出力端子とを具備していることにより、半導体素子と外部電気回路基板との間の高周波信号の伝送効率の優れたものとなる。そして、所望の伝送特性を有する半導体素子収納用パッケージを高い歩留まりで作製することが可能となり、量産性に優れるものとすることができる。
【0060】
本発明の半導体装置は、上記本発明の半導体素子収納用パッケージと、載置部に載置固定されるとともに入出力端子に電気的に接続された半導体素子と、誘電体板の切欠き部の内側の線路導体に接合されたリード端子と、枠体の上面に取着された蓋体とを具備していることにより、上記本発明の半導体素子収納用パッケージを用いた高周波信号の伝送効率にすぐれ、量産性に優れたものとなる。
【図面の簡単な説明】
【図1】本発明の入出力端子について実施の形態の例を示す斜視図である。
【図2】図1の入出力端子について、リード端子と線路導体との接合部における要部拡大上面図である。
【図3】図2のリード端子と線路導体との接合部における要部拡大断面図である。
【図4】本発明の半導体素子収納用パッケージについて実施の形態の例を示す分解斜視図である。
【図5】本発明の入出力端子と従来の入出力端子について高周波信号の反射損失を測定した結果のグラフである。
【図6】従来の入出力端子の斜視図である。
【符号の説明】
1:平板部
2:下部接地導体
3:線路導体
4:リード端子
5:立壁部
6:上部接地導体
8:入出力端子
11:誘電体板
21:基体
22:枠体
23:取付部
25:半導体素子
26:蓋体
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an input / output terminal used for a signal input / output unit of a semiconductor element housing package for housing a semiconductor element operated by a high frequency signal, a semiconductor element housing package, and a semiconductor device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a semiconductor element housing package (hereinafter, also referred to as a package) for housing a semiconductor element using a high frequency signal such as a microwave band or a millimeter wave band electrically connects a semiconductor element to an external electric circuit board. Input / output terminals are provided. This input / output terminal is shown in a perspective view in FIG.
[0003]
In the figure, 101 is an alumina (Al) 2 O 3 ) Sintered body, aluminum nitride (AlN) sintered body, mullite (3Al 2 O 3 ・ 2SiO 2 ) A rectangular flat plate portion made of a dielectric material such as a sintered body. The flat plate portion 101 is formed on the upper surface from one side to the other side, and metallized with tungsten (W), molybdenum (Mo), or the like. A line conductor 103 composed of a layer is formed, and a lead terminal 104 made of an iron (Fe) -nickel (Ni) -cobalt (Co) alloy or an Fe-Ni alloy is provided at one end of the line conductor 103 with a silver (Ag) solder or the like. Joined via a conductive adhesive. On the lower surface of the flat plate portion 101, a lower ground conductor 102 made of the same metallized layer as the line conductor 103 is provided on the entire lower surface.
[0004]
Also, an Al conductor having an upper ground conductor 106 on the upper surface while being joined to the upper surface of the flat plate portion 101 with a part of the line conductor 103 interposed therebetween. 2 O 3 Sintered body, AlN sintered body, 3Al 2 O 3 ・ 2SiO 2 A rectangular parallelepiped standing wall 105 made of a dielectric material such as high-quality sintering is provided. Therefore, the line conductor 103 includes a microstrip line that is not held between the flat plate portion 101 and the standing wall portion 105 and a strip line that is held between the flat plate portion 101 and the standing wall portion 105. A side surface ground conductor 107 made of a metallized layer similar to the line conductor 103 is formed on a side surface of the flat plate portion 101 and the vertical wall portion 105 substantially parallel to the line direction of the line conductor 103 (see, for example, Patent Document 1 below). .
[0005]
As described above, the input / output terminal 108 includes the flat plate portion 101 and the upright wall portion 105, and is provided in the package to hermetically seal the inside and outside of the package and seal the inside.
[0006]
Such an input / output terminal 108 is attached to a base having a mounting portion on which a semiconductor element is mounted at the center of the upper surface, and is mounted on the upper surface of the base so as to surround the mounting portion, and penetrates through the side. When the frame is made of metal (metal wall type) in a package including a frame on which an attachment portion of the input / output terminal 108 formed of a hole or a notch is formed, or by being fitted to the attachment portion, or When the frame is made of ceramics (ceramic wall type), the input / output terminal 108 and the frame are integrally formed, so that the semiconductor element housed therein and the external electric circuit board are connected. Functions as a transmission line for input / output signals.
[0007]
[Patent Document 1]
JP 2002-100693 A
[0008]
[Problems to be solved by the invention]
However, in the conventional input / output terminal 108, as the frequency of the high-frequency signal transmitted through the line conductor 103 becomes higher, the impedance matching deteriorates due to a slight displacement of the joining position between the line conductor 103 and the lead terminal 104. In addition, transmission loss such as reflection loss is likely to occur in a high-frequency signal transmitted through the junction between the line conductor 103 and the lead terminal 104, and as a result, the transmission efficiency of the high-frequency signal transmitted through this junction decreases, and There is a problem that it becomes difficult to obtain transmission characteristics, and the manufacturing yield of the package is reduced.
[0009]
Accordingly, the present invention has been completed in view of the above problems, and an object of the present invention is to provide a joint between a line conductor of an input / output terminal and a lead terminal for transmitting a high-frequency signal to a semiconductor element housed in a semiconductor element housing package. By suppressing the transmission loss of the high-frequency signal, the transmission efficiency of the high-frequency signal between the semiconductor element and the external electric circuit board can be improved, and the semiconductor element housing package excellent in mass productivity can be obtained. It is an object of the present invention to provide an input / output terminal, a semiconductor element storage package and a semiconductor device which are excellent in transmission efficiency of high frequency signals and mass productivity using the same.
[0010]
[Means for Solving the Problems]
An input / output terminal according to the present invention includes a rectangular flat plate portion made of a dielectric having a line conductor formed from one side to the other side facing the upper surface and a lower ground conductor on the lower surface, and the line formed on the upper surface of the flat plate portion. A rectangular parallelepiped standing wall made of a dielectric having an upper grounding conductor formed on the upper surface and joined with a part of the conductor interposed therebetween, and a lead terminal is joined to an exposed end of the line conductor. In the input / output terminal, the flat plate portion is formed on the exposed upper surface on the side to which the lead terminal is joined, except for the portion of the line conductor to which the lead terminal is joined, with the line conductor of the lead terminal. And a dielectric plate having a notch surrounding the joint.
[0011]
In the input / output terminal of the present invention, a dielectric plate having a notch surrounding a joint between the lead terminal and the line conductor is joined to a portion of the upper surface of the flat plate except for a portion to which the lead terminal of the line conductor is joined. Therefore, by fitting the lead terminal into the notch of the dielectric plate, the lead terminal and the line conductor can be joined with good positional accuracy without deteriorating the impedance matching. As a result, the lead It is possible to effectively suppress the occurrence of transmission loss such as reflection loss in a high-frequency signal transmitted through the joint between the terminal and the line conductor.
[0012]
In addition, since the cutout portion of the dielectric plate can prevent the conductive adhesive such as Ag braze that joins the lead terminal and the line conductor from flowing out, the lead terminal passes from one side surface to the other side surface through the end surface. It is possible to form a gentle meniscus of the conductive adhesive continuous over the entire surface, and it is possible to improve the bonding strength between the lead terminal and the line conductor.
[0013]
A package for storing a semiconductor element according to the present invention has a base having a mounting portion on which a semiconductor element is mounted on a central portion of an upper surface, and a side portion mounted on the upper surface of the base so as to surround the mounting portion. And a frame formed with a mounting portion for an input / output terminal formed of a through hole or a notch, and the input / output terminal of the present invention fitted to the mounting portion.
[0014]
The package for housing a semiconductor element of the present invention has excellent transmission efficiency of a high-frequency signal between the semiconductor element and the external electric circuit board due to the above configuration. Then, a semiconductor device housing package having desired transmission characteristics can be manufactured with a high yield, and mass productivity can be improved.
[0015]
The semiconductor device of the present invention includes the semiconductor element housing package of the present invention, a semiconductor element mounted and fixed on the mounting portion and electrically connected to the input / output terminal, and the semiconductor plate of the dielectric plate. A lead terminal joined to the line conductor inside the cutout portion, and a lid attached to an upper surface of the frame are provided.
[0016]
According to the semiconductor device of the present invention having the above-described configuration, the semiconductor device housing package of the present invention has excellent transmission efficiency of a high-frequency signal and excellent mass productivity.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
The input / output terminal, the package for accommodating the semiconductor element, and the semiconductor device of the present invention will be described in detail below. FIG. 1 is a perspective view showing an example of an embodiment of an input / output terminal of the present invention. In the figure, 1 is a flat plate portion, 2 is a lower ground conductor, 3 is a line conductor, 5 is a standing wall portion, 6 is an upper ground conductor, 8 is an input / output terminal, and 11 is a dielectric plate.
[0018]
The input / output terminal 8 of the present invention includes a rectangular flat plate portion 1 made of a dielectric having a line conductor 3 formed from one side to the other opposite side on the upper surface and a lower ground conductor 2 on the lower surface, and the flat plate portion 1. And a rectangular parallelepiped standing wall portion 5 made of a dielectric having an upper grounding conductor 6 formed on the upper surface thereof and joined to a portion of the line conductor 3 therebetween.
[0019]
The flat plate portion 1 is made of Al 2 O 3 Sintered body, AlN sintered body, 3Al 2 O 3 ・ 2SiO 2 It is a rectangular flat plate made of a dielectric such as a porous sintered body.
[0020]
The line conductor 3 is formed of a metallized layer of W, Mo, or the like formed from one side to the opposite side on the upper surface of the flat plate portion 1, and has a lead made of a metal such as an Fe—Ni—Co alloy or an Fe—Ni alloy at one end. The terminal 4 is connected via a conductive adhesive such as Ag solder.
[0021]
The standing wall 5 is made of Al 2 O 3 Sintered body, AlN sintered body, 3Al 2 O 3 ・ 2SiO 2 It is a rectangular parallelepiped made of a dielectric material such as a sintered compact, and is joined to the upper surface of the flat plate portion 1 with a part of the line conductor 3 interposed therebetween.
[0022]
In addition, a lower ground conductor 2 and an upper ground conductor 6 made of the same metallized layer as the line conductor 3 are provided on the entire lower surface of the flat plate portion 1 and the upper surface of the vertical wall portion 5, respectively. Further, on the side surface of the flat plate portion 1 and the side surface of the standing wall portion 5, a side ground conductor 7 made of the same metallized layer as the line conductor 3 is formed. The lower grounding conductor 2, the upper grounding conductor 6, and the side grounding conductor 7 enhance the grounding with respect to the line conductor 3, thereby improving the transmission efficiency of the high-frequency signal of the line conductor 3.
[0023]
In addition, the flat plate portion 1 of the present invention has a joint portion (hereinafter simply referred to as a joint portion) of the lead terminal 4 with the line conductor 3 at a portion other than a portion of the line conductor 3 to which the lead terminal 4 is joined. Indicates a joint between the lead terminal 4 and the line conductor 3), and a dielectric plate 11 having a notch surrounding the joint is joined.
[0024]
With this configuration, the lead terminal 4 is fitted into the notch of the dielectric plate 11 so that the lead terminal 4 and the line conductor 3 can be joined with good positional accuracy without deteriorating the impedance matching. As a result, In addition, it is possible to effectively suppress the occurrence of transmission loss such as reflection loss in a high-frequency signal transmitted through the joint between the lead terminal 4 and the line conductor 3. In addition, since the cutout portion of the dielectric plate 11 can prevent the conductive adhesive such as Ag braze that joins the lead terminal 4 and the line conductor 3 from flowing out, the end face from one side of the lead terminal 4 can be removed. Thus, a gentle meniscus of the conductive adhesive continuous over the other side surface can be formed, and the bonding strength between the lead terminal 4 and the line conductor 3 can be improved.
[0025]
Such an input / output terminal 8 is manufactured as follows. For example, Al 2 O 3 When it is composed of a porous sintered body (alumina ceramic), first, aluminum oxide and silicon oxide (SiO 2) 2 ), Magnesium oxide (MgO), calcium oxide (CaO), and other suitable raw material powders and an appropriate organic binder, plasticizer, solvent, and the like are added and mixed to form a slurry. A plurality of ceramic green sheets are obtained by a tape forming technique such as a doctor blade method and a calender roll method, which are well known in the art.
[0026]
Next, a metal paste obtained by adding an appropriate organic binder, a plasticizer, a solvent, and the like to a high melting point metal powder such as W or Mo to the ceramic green sheet is mixed with a thick film forming technique such as a screen printing method. By printing and applying, a metallized layer to be the lower ground conductor 2, the line conductor 3, and the upper ground conductor 6 is formed in a predetermined pattern. Thereafter, a plurality of ceramic green sheets are laminated, and a metal paste obtained by adding and mixing an appropriate organic binder, a plasticizer, a solvent, and the like to a high melting point metal powder such as W or Mo serving as the side ground conductor 7 is applied. This is fired at a temperature of about 1600 ° C. in a reducing atmosphere.
[0027]
The cutout portion of the dielectric plate 11 can be manufactured by forming a cutout in a part of the ceramic green sheet by a method such as punching. The ceramic green sheet serving as the dielectric plate 11 having the notch is formed as a sheet integrated with the lowermost sheet (the flat plate 1 side) of the ceramic green sheet laminate constituting the upright wall 5. Is good. Thus, the input / output terminals 8 can be efficiently formed by reducing the number of times of laminating the ceramic green sheets.
[0028]
In the cutout portion of the dielectric plate 11, the distance X between the lead terminal 4 and the dielectric plate 11 is preferably 0.03 to 0.15 mm, as shown in an enlarged top view in FIG. With this configuration, the lead terminal 4 can be joined onto the line conductor 3 with good positional accuracy without deteriorating impedance matching, and transmission loss such as reflection loss occurs in a high-frequency signal transmitted through the joint. It can be suppressed effectively. In addition, since the cutout portion of the dielectric plate 11 can prevent the conductive adhesive such as Ag braze that joins the lead terminal 4 and the line conductor 3 from flowing out, the end face from one side of the lead terminal 4 can be removed. Thus, a gentle meniscus of the conductive adhesive continuous over the other side surface can be formed, and the bonding strength between the lead terminal 4 and the line conductor 3 can be improved.
[0029]
In the case of X <0.03 mm, the distance between the lead terminal 4 and the dielectric plate 11 is very close, and it is difficult to form a good meniscus of the conductive adhesive around the joint, and the lead It becomes difficult to firmly join the terminal 4 to the line conductor 3. When X> 0.15 mm, the width of the cutout portion of the dielectric plate 11 is too large compared to the width of the lead terminal 4, and the lead terminal 4 easily shifts with respect to the line conductor 3, so that the joint portion is transmitted. Transmission loss such as reflection loss generated in a high-frequency signal is likely to be large.
[0030]
The height Y of the dielectric plate 11 is preferably t / 2 to 2t with respect to the thickness t of the lead terminal 4 as shown in an enlarged sectional view in FIG. With this configuration, a high-frequency signal transmitted through the joint between the lead terminal 4 and the line conductor 3 can be transmitted efficiently.
[0031]
In the case of Y <t / 2, the height of the dielectric plate 11 becomes too low with respect to the thickness of the lead terminal 4, and when the lead terminal 4 is joined to the line conductor 3 by a conductive adhesive, the lead terminal 4 It is easy to get on the dielectric plate 11 and join in a state where the position with respect to the line conductor 3 is shifted. When Y> 2t, the periphery of the joint of the lead terminal 4 is surrounded by the dielectric wall made of the dielectric plate 11, and the portion surrounded by the dielectric plate 11 and the portion not surrounded by the dielectric plate 11 The distribution of the electric field generated from the high-frequency signal transmitted through the lead terminal 4 toward the lower ground conductor 2 is different, and transmission loss such as reflection loss is likely to occur in the high-frequency signal transmitted through the lead terminal 4.
[0032]
More preferably, Y is set to 0.8t to 1.2t. Thereby, the distribution of the electric field generated from the upper surface of the lead terminal 4 toward the lower ground conductor 2 can be made substantially the same as the distribution of the electric field generated from the line conductor 3 toward the lower ground conductor 2. It is possible to more effectively suppress the occurrence of transmission loss in the high-frequency signal transmitted through the line conductor 3 by matching the impedance.
[0033]
The width W of the dielectric plate 11 formed so as to surround the joint is preferably 0.2 mm or more. If the thickness is less than 0.2 mm, the strength of the dielectric plate 11 is weakened, and the lead terminal 4 is easily damaged when positioning.
[0034]
Preferably, the dielectric plate 11 is formed so as to cover the surface of the line conductor 3 except for the part to which the lead terminal 4 is joined. In this case, since the dielectric plate 11 and the standing wall portion 5 are the same dielectric, the electric field distribution between the line conductor 4 covered by the standing wall portion 5 and the line conductor 4 covered by the dielectric plate 11 becomes closer, Transmission loss of a high-frequency signal can be further reduced.
[0035]
Further, as shown in FIG. 1, the dielectric plate 11 is preferably formed over substantially the entire surface of the upper surface of the flat plate portion 1 except for the joint portion with the lead terminal 4 on the joint portion side. As a result, similarly to the configuration of the standing wall portion 5, the side surface ground conductor 7 can be formed on the side surface of the dielectric plate 11 to further strengthen the grounding of the line conductor 3, and the impedance matching can be further improved. The transmission efficiency of the high-frequency signal can be further improved.
[0036]
Next, the package of the present invention will be described with reference to FIG. FIG. 1 is a perspective view showing an example of an embodiment of the package of the present invention, wherein 21 is a base, 22 is a frame, and 23 is a mounting portion.
[0037]
The package of the present invention has a base 21 having a mounting portion 21a on which a semiconductor element 25 is mounted at the center of the upper surface, and is mounted on the upper surface of the base 21 so as to surround the mounting portion 21a. A frame 22 having a mounting portion 23 for the input / output terminal 8 formed of a through hole or a notch, and the input / output terminal 8 fitted to the mounting portion 23.
[0038]
Thereby, the transmission efficiency of the high-frequency signal between the semiconductor element 25 and the external electric circuit board is improved. Then, a package having desired transmission characteristics can be manufactured at a high yield, and mass productivity can be improved.
[0039]
The base 21 has a mounting portion 21a on the upper surface for mounting a semiconductor element 25 such as an IC, an LSI, a semiconductor laser (LD), or a photodiode (PD). FIG. 4 shows an example in which the mounting portion 21a is formed as a concave portion. However, the mounting portion 21a may be formed on the upper surface of the base 21 by flattening the upper surface.
[0040]
The base 21 is made of a metal such as an Fe-Ni-Co alloy, a copper (Cu) -tungsten (W) alloy, or Al. 2 O 3 Sintered body, AlN sintered body, 3Al 2 O 3 ・ 2SiO 2 It is made of a dielectric such as a porous sintered body. When the base 21 is made of metal, the ingot is formed into a predetermined shape by subjecting the ingot to a conventionally known metal working method such as rolling or punching. On the other hand, when the base 21 is made of ceramics, an appropriate organic binder, a solvent, and the like are added to the raw material powder and mixed to form a paste. The paste is formed into a ceramic green sheet by a doctor blade method, a calendar roll method, or the like. Thereafter, the ceramic green sheet is produced by subjecting the ceramic green sheet to an appropriate punching process, laminating a plurality of the sheets, and firing at a high temperature of about 1600 ° C.
[0041]
When the base 21 is made of a metal, a metal having excellent corrosion resistance on the surface and excellent wettability with a brazing material, specifically, a Ni layer having a thickness of 0.5 to 9 μm and a thickness of 0.5 to 9 μm are formed. It is preferable that a 5 μm gold (Au) layer is sequentially applied by a plating method. Thus, the base 21 can be effectively prevented from being oxidized and corroded, and the semiconductor element 25 can be firmly adhered and fixed to the mounting portion 21a on the top of the base 21. On the other hand, when the base 21 is made of ceramics, a metallized layer of W, Mo, or the like is formed as an underlayer on the mounting portion 21a, and a metal having excellent corrosion resistance and excellent wettability with the brazing material is formed on the surface. Specifically, it is preferable that a Ni layer having a thickness of 0.5 to 9 μm and an Au layer having a thickness of 0.5 to 5 μm are sequentially deposited by plating. Thereby, the semiconductor element 25 can be firmly adhered and fixed to the mounting portion 21a.
[0042]
The frame 22 is joined to the base 21 with a high melting point metal brazing material such as an Ag brazing material or an Ag-Cu brazing material so as to surround the mounting portion 21a. . At the side of the frame 22, a mounting portion 23 of the input / output terminal 8 formed of a through hole or a notch is formed. As shown in FIG. 4, a similar notch may be provided in the base 21 to form a part of the mounting portion 23 of the input / output terminal 8.
[0043]
When the frame 22 and the base 21 are made of a dielectric material, the mounting portion 23 has a conductive layer such as a metallized layer formed on the inner surface. This conductive layer is connected to a ground conductor formed on the base 21 and / or the frame 22 and grounded.
[0044]
The input / output terminal 8 of the present invention is fitted and joined to the mounting portion 23 with a high melting point metal brazing material such as an Ag brazing material or an Ag-Cu brazing material. When the frame 22 and the base 21 are made of a dielectric, the lower ground conductor 2, the upper ground conductor 6, and the side ground conductor 7 of the input / output terminal 8 are connected to a conductive layer formed on the inner surface of the mounting portion 23. Grounding, and becomes a case ground. Alternatively, when the frame 22 and the base 21 are made of metal, the lower ground conductor 2, the upper ground conductor 6, and the side ground conductor 7 of the input / output terminal 8 are connected to the metal frame 22 and the base 21 to be grounded. , Which becomes the case ground. Further, the upper ground conductor 6 of the input / output terminal 8 is connected to a seal ring 24 made of a metal such as an Fe-Ni-Co alloy and attached to the upper surface of the frame 22 as shown in FIG. It may be a case ground.
[0045]
When the frame 22 is made of a dielectric material, the input / output terminals 8 may be integrally formed as a part of the frame 22.
[0046]
Since such a package of the present invention is provided with the input / output terminals 8, the package has good transmission characteristics in which the dielectric loss of the high-frequency signal is minimized and the transmission loss of the high-frequency signal is reduced. Become.
[0047]
After the semiconductor element 25 is mounted on the mounting portion 21a of such a package, the electrode of the semiconductor element 25 and the line conductor 3 are connected via connection means (not shown) such as a bonding wire, and the dielectric A lead terminal 4 made of a metal such as an Fe-Ni-Co alloy is joined to the line conductor 3 inside the cutout portion of the body plate 11 via a conductive adhesive such as Ag braze to form a semiconductor element 25 and an external electric circuit. The board is electrically connected. Next, if necessary, a seal ring 24 is formed on the upper surface of the frame body 22 by using a low melting point metal brazing material such as lead (Pb) -tin (Sn) solder or Au-Sn solder, or a high melting point metal such as Ag-Cu brazing material. The semiconductor element 25 is housed inside the package by attaching with a brazing material or the like and attaching a lid 26 made of an Fe-Ni-Co alloy or the like to the upper surface of the seal ring 24 by soldering or seam welding. Semiconductor device as a product.
[0048]
Further, in the embodiment of FIG. 4, two input / output terminals 8 are provided on opposite sides of the frame 22, but may be provided on other sides as necessary, or on one side. A plurality of input / output terminals 8 may be attached. In this case, a plurality of attachment portions 23 may be provided on one side, and a plurality of input / output terminals 8 may be attached in parallel.
[0049]
Since such a semiconductor device of the present invention includes the input / output terminal 8 of the present invention, the dielectric loss of the high-frequency signal is minimized, the transmission loss of the high-frequency signal is reduced, and the transmission efficiency is reduced. It can be held well.
[0050]
【Example】
An embodiment of the input / output terminal of the present invention will be described below.
[0051]
The input / output terminal 8 of FIG. 1 was manufactured as follows. Al 2 O 3 A line conductor 3 made of a metallized layer of W is provided on the upper surface of a rectangular flat plate portion 1 made of a porous sintered body, and a lower ground conductor 2 made of a metallized layer of W is provided on the lower surface. Also, an Al having an upper ground conductor 6 made of a metallized layer of W on the upper surface of the flat plate portion 1. 2 O 3 A rectangular parallelepiped standing wall 5 made of a porous sintered body was brazed with a part of the line conductor 3 interposed therebetween. On both side surfaces of the flat plate portion 1 and the vertical wall portion 5 parallel to the line direction, side grounding conductors 7 made of the same metallized layer as the line conductors 3 are provided, and joint portions of the lead terminals 4 on the upper surface of the flat plate portion 1 with the line conductors 3 are provided. The same Al as the upright wall 5 except for 2 O 3 By providing a dielectric plate 11 made of ceramics, the input / output terminal 8 was manufactured. Then, a sample A was manufactured by joining a lead terminal 4 made of an Fe-Ni-Co alloy to one end of the line conductor 3 via an Ag solder.
[0052]
In sample A, the lead terminal 4 had a width of 0.4 mm and a thickness t of 0.2 mm. X = 0.03 mm in FIG. 2 and Y = 0.2 mm in FIG.
[0053]
In addition, as a comparative example, one in which the dielectric plate 11 was not provided on the upper surface of the flat plate portion 1 was produced in the same manner as in the above-described example, and this was designated as Sample B.
[0054]
Then, for samples A and B, a high-frequency signal of 1 to 25 GHz was input between the line conductor 3 and the lead terminal 4, and the reflection loss was measured. The result is shown in FIG. From FIG. 5, it was found that the sample B without the dielectric plate 11 as a comparative example had a large reflection loss in the entire frequency band of 1 to 25 GHz. In addition, in sample B, it was found that the lead terminal 4 was joined by being shifted from the predetermined position of the line conductor 3 by 0.2 mm in the line direction and by 0.2 mm in the direction perpendicular to the line direction.
[0055]
On the other hand, the sample A, which is the input / output terminal 8 of the present invention, has a reduced reflection loss particularly in a higher frequency band of 13 GHz or more, and is suitable for a semiconductor device that processes large-capacity information at high speed. It turned out to be valid. Further, it was found that there was no deviation of the lead terminal 4 from the predetermined position of the line conductor 3 and the lead terminal 4 was joined with high positional accuracy.
[0056]
It should be noted that the present invention is not limited to the above embodiments and examples, and various changes may be made without departing from the scope of the present invention.
[0057]
【The invention's effect】
An input / output terminal according to the present invention includes a rectangular flat plate portion made of a dielectric having a line conductor formed from one side to the other side opposite to the upper surface and a lower ground conductor on the lower surface, and a line conductor formed on the upper surface of the flat plate portion. And a rectangular parallelepiped wall made of a dielectric having an upper ground conductor formed on the upper surface thereof, and a lead terminal is bonded to an exposed end of the line conductor. In the output terminal, the flat plate portion has a cutout surrounding the joint between the lead terminal and the line conductor on the exposed upper surface of the side to which the lead terminal is joined except for the portion where the lead terminal of the line conductor is joined. Since the dielectric plate having the joint is joined, the lead terminal is fitted into the notch of the dielectric plate to join the lead terminal and the line conductor with high positional accuracy without deteriorating impedance matching. Can, as a result, it is possible to effectively suppress the transmission loss of the reflection loss and the like to a high-frequency signal transmitted through the joint between the lead terminal and the line conductor occurs.
[0058]
In addition, since the cutout portion of the dielectric plate can prevent the conductive adhesive such as Ag braze that joins the lead terminal and the line conductor from flowing out, the lead terminal passes from one side surface to the other side surface through the end surface. It is possible to form a gentle meniscus of the conductive adhesive continuous over the entire surface, and it is possible to improve the bonding strength between the lead terminal and the line conductor.
[0059]
The package for housing a semiconductor element of the present invention is attached to a base having a mounting portion on which a semiconductor element is mounted at the center of the upper surface, and is mounted on the upper surface of the base so as to surround the mounting portion, A semiconductor element and an external electric circuit are provided by including a frame in which a mounting portion for an input / output terminal formed of a through hole or a notch is formed, and the input / output terminal of the present invention fitted in the mounting portion. The transmission efficiency of the high-frequency signal to and from the substrate is excellent. Then, a semiconductor device housing package having desired transmission characteristics can be manufactured with a high yield, and mass productivity can be improved.
[0060]
The semiconductor device of the present invention includes the semiconductor element housing package of the present invention, a semiconductor element mounted and fixed on the mounting portion and electrically connected to the input / output terminal, and a cutout portion of the dielectric plate. By providing a lead terminal joined to the inner line conductor and a lid attached to the upper surface of the frame, the transmission efficiency of a high-frequency signal using the semiconductor device housing package of the present invention is improved. Excellent and excellent in mass productivity.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of an embodiment of an input / output terminal of the present invention.
FIG. 2 is an enlarged top view of a main part of a joint between a lead terminal and a line conductor in the input / output terminal of FIG. 1;
FIG. 3 is an enlarged sectional view of a main part at a joint between a lead terminal and a line conductor in FIG. 2;
FIG. 4 is an exploded perspective view showing an example of an embodiment of the package for housing a semiconductor element of the present invention.
FIG. 5 is a graph showing the results of measuring the reflection loss of a high-frequency signal for the input / output terminal of the present invention and the conventional input / output terminal.
FIG. 6 is a perspective view of a conventional input / output terminal.
[Explanation of symbols]
1: Flat plate
2: Lower ground conductor
3: Line conductor
4: Lead terminal
5: standing wall
6: Upper ground conductor
8: Input / output terminal
11: dielectric plate
21: Substrate
22: Frame
23: Mounting part
25: Semiconductor element
26: Lid

Claims (3)

上面に一辺から対向する他辺にかけて形成された線路導体および下面に下部接地導体を有する誘電体から成る四角平板状の平板部と、該平板部の上面に前記線路導体の一部を間に挟んで接合された、上面に上部接地導体が形成された誘電体から成る直方体状の立壁部とを具備し、前記線路導体の露出した一端部にリード端子が接合される入出力端子において、前記平板部は、前記リード端子が接合される側の露出した上面で前記線路導体の前記リード端子が接合される部位を除いた部位に、前記リード端子の前記線路導体との接合部を囲む切欠き部を有する誘電体板が接合されていることを特徴とする入出力端子。A rectangular flat plate portion made of a dielectric having a line conductor formed from one side to the other side opposite to the upper surface and a lower ground conductor on the lower surface, and a part of the line conductor sandwiched between the upper surface of the flat plate portion; A rectangular parallelepiped standing wall made of a dielectric having an upper ground conductor formed on the upper surface thereof, and a lead terminal joined to an exposed end of the line conductor. A cutout portion surrounding a joint of the lead terminal with the line conductor at a portion of the exposed upper surface on a side to which the lead terminal is joined, excluding a portion of the line conductor to which the lead terminal is joined. An input / output terminal, wherein a dielectric plate having: 上面の中央部に半導体素子が載置される載置部を有する基体と、該基体の上面に前記載置部を囲繞するように取着され、側部に貫通孔または切欠きから成る入出力端子の取付部が形成された枠体と、前記取付部に嵌着された請求項1記載の入出力端子とを具備していることを特徴とする半導体素子収納用パッケージ。A base having a mounting portion on which a semiconductor element is mounted in the center of the upper surface, and an input / output which is attached to the upper surface of the base so as to surround the mounting portion and which has a through hole or a cutout on a side portion. A semiconductor device housing package comprising: a frame having a terminal attachment portion formed therein; and the input / output terminal according to claim 1 fitted to the attachment portion. 請求項2記載の半導体素子収納用パッケージと、前記載置部に載置固定されるとともに前記入出力端子に電気的に接続された半導体素子と、前記誘電体板の前記切欠き部の内側の前記線路導体に接合されたリード端子と、前記枠体の上面に取着された蓋体とを具備していることを特徴とする半導体装置。3. The package for storing a semiconductor element according to claim 2, a semiconductor element mounted and fixed to the mounting section and electrically connected to the input / output terminal, and a semiconductor element inside the notch of the dielectric plate. A semiconductor device comprising: a lead terminal joined to the line conductor; and a lid attached to an upper surface of the frame.
JP2003018002A 2003-01-27 2003-01-27 I / O terminal and semiconductor element storage package and semiconductor device Pending JP2004228532A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011181897A (en) * 2010-02-03 2011-09-15 Toshiba Corp Package for housing semiconductor element, and semiconductor device using the same
JP2014216513A (en) * 2013-04-26 2014-11-17 京セラ株式会社 Package for housing optical semiconductor element and mounting structure including the same
WO2018155282A1 (en) * 2017-02-23 2018-08-30 京セラ株式会社 Insulating support, semiconductor package and semiconductor device
CN114450787A (en) * 2020-07-20 2022-05-06 日本电信电话株式会社 High frequency packaging

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011181897A (en) * 2010-02-03 2011-09-15 Toshiba Corp Package for housing semiconductor element, and semiconductor device using the same
JP2014216513A (en) * 2013-04-26 2014-11-17 京セラ株式会社 Package for housing optical semiconductor element and mounting structure including the same
WO2018155282A1 (en) * 2017-02-23 2018-08-30 京セラ株式会社 Insulating support, semiconductor package and semiconductor device
CN110337718A (en) * 2017-02-23 2019-10-15 京瓷株式会社 Insulating substrates, semiconductor packages, and semiconductor devices
CN110337718B (en) * 2017-02-23 2023-06-16 京瓷株式会社 Insulating substrate, semiconductor package, and semiconductor device
CN114450787A (en) * 2020-07-20 2022-05-06 日本电信电话株式会社 High frequency packaging

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