JP2023015234A - 半導体装置及びチューナ装置 - Google Patents
半導体装置及びチューナ装置 Download PDFInfo
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Abstract
Description
第1の半導体チップ及び第2の半導体チップのそれぞれがLC共振器のインダクタを同一の位置に有し、
シールド層の領域の面積が第1の半導体チップの面積及び第2の半導体チップの面積よりも小であり、且つ第1の半導体チップのLC共振器のインダクタ直上からスペーサの配置による電磁界放射の広がり分に対応する領域を覆うものとされた半導体装置である。
また、本技術は、基板上に固定された第1の半導体チップからなる第1のチューナ部と、第1の半導体チップ上に積層されたスペーサと、スペーサの上面に形成された金属製の薄膜からなるシールド層と、シールド層の上に積層された第2の半導体チップからなる第2のチューナ部を備えたチューナ装置であって、
第1のチューナ部及び第2のチューナ部のそれぞれがLC共振器のインダクタを同一の位置に有し、
シールド層の領域の面積が第1の半導体チップの面積及び第2の半導体チップの面積よりも小であり、且つ第1の半導体チップのLC共振器のインダクタ直上からスペーサの配置による電磁界放射の広がり分に対応する領域を覆うものとされたチューナ装置である。
なお、本技術の説明は、下記の順序にしたがってなされる。
<2.本技術を適用できる半導体装置>
<3.本技術の一実施の形態>
<4.応用例>
<5.変形例>
本技術の説明に先立って従来の半導体装置の問題点について説明する。従来の半導体装置は、共通の基板上に同一構成の二つの半導体チップを配置したものである。各半導体チップには、発振器、増幅器、メモリ、ロジックなど様々な回路(集積回路IC)が含まれている。縦型の配置と異なり、平面的に二つの半導体チップを配置する構成は、半導体装置の形状(面積)が大きくなる問題がある。
図1は、本技術を適用できる半導体装置10の断面図である。基板2上に半導体チップ3aが接着剤又は銀ペースト等で固定されている。この半導体チップ3aには、発振器、増幅器、メモリ、ロジックなど様々な回路が含まれ、例えば、テレビジョン受信装置のチューナ部が構成される。半導体チップ3bも同様である。なお、半導体チップ3a及び3bのそれぞれは、複数のICやチップ部品からなる構成に限らず、1個のチップ上にこれらの機能を取り込んだ構成(SoC(System on a Chip))も可能である。
tはシールド層7の厚さである。
図2は、本技術の一実施の形態による半導体装置30を示す断面図である。一実施の形態は、スペーサ5の上面に形成するシールド層7の領域を限定したものである。シールド層として、広範な面積のアルミニウム層を形成する場合に、アルミスライドと呼ばれるアルミニウム層の割れが生じる場合がある。そこで、アルミニウム層のアルミスライドを回避するため、シールド層7のシールド領域を最小化するようになされることで半導体チップのインダクタから放射される電磁界を減衰させる効果が得られる。
上述した本技術による半導体装置は、例えば地上デジタル放送又はデジタル衛星放送を受信する受信装置のチューナ部に適用することができる。チューナ部の構成として、フェージングに対する有効な対策の一つであるダイバーシティ受信技術がある。通信での電波は建物や樹木、地形の起伏など障害物や反射物の影響を受けて反射や回折、散乱を起こす。その結果、さまざまな経路を通った多数の電波が互いに干渉し合って、電波の強さが激しく変化する。これをフェージングと呼ぶ。ダイバーシティ技術(Diversity )とは、複数のアンテナで受信した同一の無線信号について、電波状況の優れたアンテナの信号を優先的に用いたり、受信した信号を合成してノイズを除去したりすることによって、通信の質や信頼性の向上を図る技術のことである。電波は物体にあたると反射するため、たとえば大きなビルのそばで通信機を使うと、直接とどく電波と、ビルに反射してとどく電波があり、2つの電波はわずかに到達時間に差が生じ(マルチパス)、2つの電波が干渉して通信の質が落ちる。これを防止するため、2本以上のアンテナを使って複数の電波を受信し、最も強い電波を選択するあるいは合成する技術をダイバーシティと呼ぶ。ダイバーシティ受信は、複数のアンテナを空間的に離したり、方向、偏波を変えたりして設置することによって得られる複数の受信系の出力を合成したり、切り替えたりすることで、受信電波のレベル変動を極力少なくする技術である。ダイバーシティ受信系における出力の合成方法としては、主に最大比合成受信法、選択合成受信法、等利得合成受信法がある。
以上、本技術の実施の形態について具体的に説明したが、上述の各実施の形態に限定されるものではなく、本技術の技術的思想に基づく各種の変形が可能である。また、上述の実施の形態の構成、方法、工程、形状、材料及び数値などは、本技術の主旨を逸脱しない限り、互いに組み合わせることが可能である。
2・・・基板、
3a,3b・・・半導体チップ
4a,4b・・・接着剤
5・・・スペーサ、
6a,6b・・・ワイヤ
7・・・シールド層
Claims (8)
- 基板上に固定され、テレビジョン放送受信用チューナを構成する第1の半導体チップと、前記第1の半導体チップ上に積層されたスペーサと、前記スペーサの上面に形成された金属製の薄膜からなるシールド層と、前記シールド層の上に積層され、テレビジョン放送受信用チューナを構成する第2の半導体チップを備えた半導体装置であって、
前記第1の半導体チップ及び前記第2の半導体チップのそれぞれがLC共振器のインダクタを同一の位置に有し、
前記シールド層の領域の面積が前記第1の半導体チップの面積及び前記第2の半導体チップの面積よりも小であり、且つ前記第1の半導体チップの前記LC共振器のインダクタ直上から前記スペーサの配置による電磁界放射の広がり分に対応する領域を覆うものとされた半導体装置。 - 前記テレビジョン放送受信用チューナがPLLを含む請求項1に記載の半導体装置。
- 前記スペーサは、シリコン、アルミナ、ジルコニアおよびチッ化アルミニウムのいずれか一つを含む請求項1に記載の半導体装置。
- 前記シールド層の金属製の薄膜は、アルミニウム、銅、ニッケルおよび銀のいずれか一つを含む請求項1に記載の半導体装置。
- 基板上に固定された第1の半導体チップからなる第1のチューナ部と、前記第1の半導体チップ上に積層されたスペーサと、前記スペーサの上面に形成された金属製の薄膜からなるシールド層と、前記シールド層の上に積層された第2の半導体チップからなる第2のチューナ部を備えたチューナ装置であって、
前記第1のチューナ部及び前記第2のチューナ部のそれぞれがLC共振器のインダクタを同一の位置に有し、
前記シールド層の領域の面積が前記第1の半導体チップの面積及び前記第2の半導体チップの面積よりも小であり、且つ前記第1の半導体チップの前記LC共振器のインダクタ直上から前記スペーサの配置による電磁界放射の広がり分に対応する領域を覆うものとされたチューナ装置。 - 前記第1及び第2のチューナ部がPLLを含む請求項5に記載のチューナ装置。
- 前記スペーサは、シリコン、アルミナ、ジルコニアおよびチッ化アルミニウムのいずれか一つを含む請求項5に記載のチューナ装置。
- 前記シールド層の金属製の薄膜は、アルミニウム、銅、ニッケルおよび銀のいずれか一つを含む請求項5に記載のチューナ装置。
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