JP5706251B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP5706251B2 JP5706251B2 JP2011145701A JP2011145701A JP5706251B2 JP 5706251 B2 JP5706251 B2 JP 5706251B2 JP 2011145701 A JP2011145701 A JP 2011145701A JP 2011145701 A JP2011145701 A JP 2011145701A JP 5706251 B2 JP5706251 B2 JP 5706251B2
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Description
<回路構成について>
図1は、本発明の一実施の形態の半導体装置(半導体パッケージ)SM1を用いた電子装置の一例を示す回路図であり、ここでは、半導体装置SM1を用いて非絶縁型DC−DCコンバータを構成した場合の回路図が示されている。
図2〜図4は、本実施の形態の半導体装置SM1の平面透視図であり、図5〜図7は、半導体装置SM1の断面図(側面断面図)である。図2には、半導体装置SM1を上面側から見て、封止部(封止樹脂部)MRを透視した平面図(上面図)が示されている。図3は、図2において、更に金属板MP1,MP2およびボンディングワイヤWAを外した(透視した)状態の半導体装置SM1の平面透視図であり、図4は、図3において、更に半導体チップCPC,CPH,CPLを外した(透視した)状態の半導体装置SM1の平面透視図である。なお、図8は平面図であるが、図面を見易くするために、ダイパッドDP1,DP2,DP3、リード配線LBおよびリードLDに斜線のハッチングを付してある。また、図5は、図2のA−A線の断面図にほぼ対応し、図6は、図2のB−B線の断面図にほぼ対応し、図7は、図2のC−C線の断面図にほぼ対応している。なお、符号Xは第1方向、符号Yは第1方向Xに直交する第2方向を示している。
図8は半導体装置SM1の実装例を示す要部平面図、図9は図8を矢印20で示す方向から見た側面図である。
次に、上記パワーMOSQH1およびセンスMOSQS1が形成された半導体チップCPHの構成について説明する。
半導体チップCPHには、パワーMOSQH1だけでなく、パワーMOSQH1に流れる電流を検知するためのセンスMOSQS1も形成されており、この半導体チップCPHをチップ搭載部である導電性のダイパッドDP2上に導電性の接合材(接着層SD1)を介して接合し、これを樹脂封止して、半導体装置SM1が形成されている。半導体チップCPHの裏面全体に裏面電極BE1が形成されており、この半導体チップCPHの裏面電極BE1とダイパッドDP2との間に、導電性の接合材を介して電流が流れる構成となっている。
以下、センスMOS領域RG2の配置位置を含めて、半導体チップCPHの主面内のレイアウトの主要な特徴について、上記図10〜図12を参照しながら具体的に説明する。
図26〜図28は、本実施の形態の半導体チップCPHの第1変形例のチップレイアウトを示す平面図であり、図26が上記図10に対応し、図27が上記図11に対応し、図28が上記図12に対応している。また、図29は、図26のE−E線の断面図であり、上記図16に対応するものである。
図30〜図32は、本実施の形態の半導体チップCPHの第2変形例のチップレイアウトを示す平面図であり、図30が上記図10および図26に対応し、図31が上記図11および図27に対応し、図32が上記図12および図28に対応している。また、図33は、図30のE−E線の断面図であり、上記図16および図29に対応するものであり、図34は、図30のF−F線の断面図である。
図37〜図39は、本実施の形態の半導体チップCPHの第3変形例のチップレイアウトを示す平面図であり、図37が上記図10、図26および図30に対応し、図38が上記図11、図27および図31に対応し、図39が上記図12、図28および図32に対応している。また、図40は、図37のE−E線の断面図であり、上記図16、図29および図33に対応するものである。また、図37のF−F線の断面図は、上記図34と同様である。
図41は、本実施の形態の半導体装置SM1の第4変形例(すなわち半導体装置SM1b)を示す平面透視図であり、上記図2に対応するものである。また、図42および図43は、図41の半導体装置SM1bの断面図であり、図41のG−G線の断面図が図42に対応し、図41のH−H線の断面図が図43に対応している。図41〜図43に示される第4変形例の半導体装置SM1を、以下では、半導体装置SM1bと称することとする。
図46は、本実施の形態の半導体装置SM1の第6変形例(すなわち半導体装置SM1d)を示す平面透視図であり、上記図2に対応するものである。また、図47および図48は、図46の半導体装置SM1dの断面図であり、図46のJ−J線の断面図が図47に対応し、図46のK−K線の断面図が図48に対応している。図46〜図48に示される第6変形例の半導体装置SM1を、以下では、半導体装置SM1dと称することとする。
上記実施の形態1では、半導体チップCPH,CPLの表面側にソース用のパッドとゲート用のパッドとが形成され、裏面側にドレイン用の裏面電極が形成されていたが、半導体チップCPH,CPLにおいてトレンチ型ゲート型MOSFETの代わりにLDMOSFETを形成することで、表面側のソース用のパッドをドレイン用のパッドに換え、ドレイン用の裏面電極をソース用の裏面電極に換えることもできる。本実施の形態では、この場合について説明する。
1a 基板本体
1b エピタキシャル層
2 フィールド絶縁膜
3 半導体領域
4 半導体領域
5 溝
6 ゲート絶縁膜
7 ゲート電極
7a 配線部
8 絶縁膜
9a,9b コンタクトホール
10 導電体膜
10G ゲート配線
10G1 ゲート配線
10S1 ソース配線
10S2 ソース配線
11 半導体領域
12 保護膜
13 開口部
14 金属層
20 矢印
21 配線基板
22a、22b,22c,22d,22e 配線
31 基板(半導体基板)
31a 基板本体
31b エピタキシャル層
33 p型ウエル
34 ゲート絶縁膜
35 ゲート電極
36 サイドウォールスペーサ
37 第1のn−型ドレイン領域
38 第2のn−型ドレイン領域
39 n+型ドレイン領域
40 n−型ソース領域
41 金属層
41 n+型型ソース領域
44 p型打抜き層
45 p+型半導体領域
46 絶縁膜
48 プラグ
49 金属シリサイド層
50 保護膜
51 開口部
111 半田
112,112a,112b 電流
113 クラック
AMP1 アンプ回路
BE1,BE2 裏面電極
CA,CB,CC チップ部品
CLC 制御回路
CMP1 コンパレータ回路
CPH,CPH101,CPL 半導体チップ
Cout 出力コンデンサ
DP1,DP2,DP3 ダイパッド
DR1,DR2 ドライバ回路
Idh,Iref,Ise 電流
Ilm 許容上限値
L1 コイル
LB リード配線
LD,LD1,LD2LD3,LD4,LD5 リード
LOD 負荷
M1 配線
M1D1,M1D2 ドレイン配線
M1G ゲート配線
MP1 金属板
MP1a 第1部分
MP1b 第2部分
MP1c 第3部分
MP2 金属板
MP2a 第1部分
MP2b 第2部分
MP2c 第3部分
MR 封止部
MRa 上面
MRb 裏面
N1 出力ノード
OCP 過電流保護回路
OP 開口部
PD,PDC1,PDC2,PDC3,PDC4,PDC5 パッド
PDHG,PDHS1,PDHS1a,PDHS1b パッド
PDHS2,PDHS3,PDHS4 パッド
PDLG,PDLS1,PDLS3,PDLS4 パッド
PF,PG パッケージ
PWL p型ウエル
QH1 パワーMOS(パワーMOSFET)
QL パワーMOS(パワーMOSFET)
QS1 センスMOS(センスMOSFET)
R101,R102,R103,R104 抵抗
RG1 メインMOS領域
RG2 センスMOS領域
RST 抵抗
SD1,SD2,SD3,SD4 接着層
SM1,SM1a,SM1b,SM1c 半導体装置
SM1d,SM1e,SM1f 半導体装置
TE1,TE2,TE3 端子
TR1 トランジスタ
VIN 電位
WA ワイヤ(ボンディングワイヤ)
X 第1方向
Y 第2方向
Claims (7)
- 導電性を有する第1チップ搭載部と、
第1主面および前記第1主面とは反対側の第1裏面を有し、前記第1裏面が前記第1チップ搭載部と導電性の接合材を介して接合された第1半導体チップと、
前記第1半導体チップおよび前記第1チップ搭載部の少なくとも一部を封止する封止部と、
を有する半導体装置であって、
前記第1半導体チップには、ドレイン同士が電気的に接続されかつゲート同士が電気的に接続された第1MOSFETおよび第2MOSFETが形成されており、
前記第1MOSFETは、前記第1半導体チップの前記第1主面の第1領域に形成され、
前記第2MOSFETは、前記第1MOSFETに流れる電流検出用の素子であり、かつ、前記第1半導体チップの前記第1主面の第2領域に形成されており、
前記第1および第2MOSFETのゲートに電気的に接続された第1ゲートパッドと、前記第1MOSFETのソースに電気的に接続された第1ソースパッドおよび第3ソースパッドと、前記第2MOSFETのソースに電気的に接続された第2ソースパッドとが、前記第1半導体チップの前記第1主面に形成され、
前記第1および第2MOSFETのドレインに電気的に接続されたドレイン電極が、前記第1半導体チップの前記第1裏面に形成され、
前記第1半導体チップの前記第1主面において、前記第2領域は前記第1領域よりも面積が小さく、かつ、前記第2領域は前記第2ソースパッドよりも内側に配置され、かつ、前記第2領域は前記第1ゲートパッドよりも内側に配置され、
前記第1半導体チップの前記第1主面において、平面視で、前記第2領域は前記第1領域に囲まれており、
前記第2領域に形成された前記第2MOSFETのソース領域と前記第2ソースパッドとは、前記第1半導体チップに形成されたソース用配線を介して電気的に接続され、
前記第1および第2MOSFETのゲートと前記第1ゲートパッドとを電気的に接続するゲート用配線が、前記ソース用配線と同層で、かつ平面視で前記第1ソースパッドと前記第3ソースパッドとの間に延在しており、
前記ソース用配線は、平面視で前記第1ソースパッドと前記第3ソースパッドとの間を、前記ゲート用配線に沿うように延在し、
前記封止部により少なくとも一部が封止された第1導体部を更に有し、
前記第1および第3ソースパッドと前記第1導体部とは、第1導体板を介して電気的に接続されており、
前記第1半導体チップの主面において、平面視で前記第2領域は前記第1導体板に重なっており、前記第2ソースパッドは前記第1導体板に重なっていない、半導体装置。 - 請求項1記載の半導体装置において、
前記第1半導体チップの前記第1主面において、平面視で、前記第2領域は前記第1ソースパッドおよび前記第3ソースパッドに囲まれている、半導体装置。 - 請求項2記載の半導体装置において、
前記第2MOSFETを流れる電流に応じて、前記第1MOSFETが制御される、半導体装置。 - 請求項3記載の半導体装置において、
前記第1導体部上に搭載された第2半導体チップと、前記封止部により少なくとも一部が封止された第2導体部とを更に有し、
前記第2半導体チップは、第2主面および前記第2主面とは反対側の第2裏面を有し、かつ前記第2裏面が導電性の接合材を介して前記第1導体部に接合されており、
前記第2半導体チップには、第3MOSFETが形成されており、
前記第3MOSFETのゲートに電気的に接続された第2ゲートパッドと、前記第3MOSFETのソースに電気的に接続された第4ソースパッドとが、前記第2半導体チップの前記第2主面に形成され、
前記第3MOSFETのドレインに電気的に接続されたドレイン電極が、前記第2半導体チップの前記第2裏面に形成され、
前記第4ソースパッドと前記第2導体部とは、第2導体板を介して電気的に接続されている、半導体装置。 - 請求項4記載の半導体装置において、
第2チップ搭載部と、
第3主面および前記第3主面とは反対側の第3裏面を有し、前記第3裏面が前記第2チップ搭載部に接合された第3半導体チップと、
を更に有し、
前記第3半導体チップには、前記第1および第2MOSFETを制御する制御回路が形成されており、
前記第1ゲートパッド、前記第2ゲートパッドおよび前記第2ソースパッドは、それぞれワイヤを介して前記第3半導体チップのパッドに電気的に接続されている、半導体装置。 - 請求項5記載の半導体装置において、
前記第2MOSFETを流れる電流が過大だと判別したときに、前記第3半導体チップの前記制御回路は、前記第1MOSFETをオフする、半導体装置。 - 導電性を有する第1チップ搭載部と、
第1主面および前記第1主面とは反対側の第1裏面を有し、前記第1裏面が前記第1チップ搭載部と導電性の接合材を介して接合された第1半導体チップと、
前記第1半導体チップおよび前記第1チップ搭載部の少なくとも一部を封止する封止部と、
を有する半導体装置であって、
前記第1半導体チップには、ソース同士が電気的に接続されかつゲート同士が電気的に接続された第1MOSFETおよび第2MOSFETが形成されており、
前記第1MOSFETは、前記第1半導体チップの前記第1主面の第1領域に形成され、
前記第2MOSFETは、前記第1MOSFETに流れる電流検出用の素子であり、かつ、前記第1半導体チップの前記第1主面の第2領域に形成されており、
前記第1および第2MOSFETのゲートに電気的に接続された第1ゲートパッドと、前記第1MOSFETのドレインに電気的に接続された第1ドレインパッドおよび第3ドレインパッドと、前記第2MOSFETのドレインに電気的に接続された第2ドレインパッドとが、前記第1半導体チップの前記第1主面に形成され、
前記第1および第2MOSFETのソースに電気的に接続されたソース電極が、前記第1半導体チップの前記第1裏面に形成され、
前記第1半導体チップの前記第1主面において、前記第2領域は前記第1領域よりも面積が小さく、かつ、前記第2領域は前記第2ドレインパッドよりも内側に配置され、かつ、前記第2領域は前記第1ゲートパッドよりも内側に配置され、
前記第1半導体チップの前記第1主面において、平面視で、前記第2領域は前記第1領域に囲まれており、
前記第2領域に形成された前記第2MOSFETのドレイン領域と前記第2ドレインパッドとは、前記第1半導体チップに形成されたドレイン用配線を介して電気的に接続され、
前記第1および第2MOSFETのゲートと前記第1ゲートパッドとを電気的に接続するゲート用配線が、前記ドレイン用配線と同層で、かつ平面視で前記第1ドレインパッドと前記第3ドレインパッドとの間に延在しており、
前記ドレイン用配線は、平面視で前記第1ドレインパッドと前記第3ドレインパッドとの間を、前記ゲート用配線に沿うように延在し、
前記封止部により少なくとも一部が封止された第1導体部を更に有し、
前記第1および第3ドレインパッドと前記第1導体部とは、第1導体板を介して電気的に接続されており、
前記第1半導体チップの主面において、平面視で前記第2領域は前記第1導体板に重なっており、前記第2ドレインパッドは前記第1導体板に重なっていない、半導体装置。
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US11175321B1 (en) | 2020-07-08 | 2021-11-16 | Renesas Electronics Corporation | Semiconductor device |
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US20130001792A1 (en) | 2013-01-03 |
TWI520300B (zh) | 2016-02-01 |
CN102856309B (zh) | 2016-05-18 |
TW201611230A (zh) | 2016-03-16 |
CN102856309A (zh) | 2013-01-02 |
JP2013012669A (ja) | 2013-01-17 |
US8633550B2 (en) | 2014-01-21 |
TWI575704B (zh) | 2017-03-21 |
TW201310604A (zh) | 2013-03-01 |
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