JP2006156748A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
- Publication number
- JP2006156748A JP2006156748A JP2004345798A JP2004345798A JP2006156748A JP 2006156748 A JP2006156748 A JP 2006156748A JP 2004345798 A JP2004345798 A JP 2004345798A JP 2004345798 A JP2004345798 A JP 2004345798A JP 2006156748 A JP2006156748 A JP 2006156748A
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- Prior art keywords
- semiconductor
- semiconductor chip
- external terminal
- chip
- main surface
- Prior art date
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Abstract
【解決手段】 ハイサイドスイッチ用のパワーMOS・FETとローサイドスイッチ用のパワーMOS・FETとが直列に接続された回路を有する非絶縁型DC−DCコンバータにおいて、ハイサイドスイッチ用のパワーMOS・FETをpチャネル型の縦型のMOS・FETで形成し、ローサイドスイッチ用のパワーMOS・FETをnチャネル型の縦型のMOS・FETで形成することにより、ハイサイドスイッチ用のパワーMOS・FETが形成された半導体チップ5a2と、ローサイドスイッチ用のパワーMOS・FETが形成された半導体チップ5bとを同一のダイパッド7a4に搭載し、ダイパッド7a4を通じて電気的に接続した。
【選択図】 図9
Description
前記第1半導体チップの電極を前記入力電源供給用の外部端子に電気的に接続する第1リード板と、前記第2半導体チップの電極を前記基準電位供給用の外部端子に電気的に接続する第2リード板との間に電気的に接続されたコンデンサを有し、
前記コンデンサは、一対の電極の一方が前記第1リード板に接合され、前記一対の電極の他方が前記第2リード板に接合されているものである。
本実施の形態1の半導体装置は、例えばデスクトップ型のパーソナルコンピュータ、ノート型のパーソナルコンピュータ、サーバまたはゲーム機等のような電子機器の電源回路に用いられる非絶縁型DC−DCコンバータである。
タ1の動作安定性を向上させることができる。
本実施の形態2では、非絶縁型DC−DCコンバータのハイサイド用のパワーMOSにnチャネル型の横型のパワーMOSを使用した場合について説明する。回路図は図1と同じであるが、nチャネル型の横型のパワーMOSでは、p+型の打ち抜き層を使用することにより、半導体チップの主面にドレイン電極が配置され、半導体チップの裏面にソース電極が配置される構成となるため、前記実施の形態1のようにpチャネル型の縦型のパワーMOSを使用した場合と同様に、ハイサイド用のパワーMOSと、ローサイド用のパワーMOSとのダイパッドを共通化できる。このため、上記寄生インダクタンスL3,L4を低減できる。また、ハイサイド用のパワーMOSのソースとローサイド用のパワーMOSのドレインとを電気的に接続する配線の寄生抵抗も低減できる。また、ハイサイド用のパワーMOSでは、それに付加される寄生容量により、非絶縁型DC−DCコンバータ1の動作周波数が高くなるにつれスイッチング損失(ターンオン損失およびターンオフ損失)が大きく見えてくるようになるが、ハイサイド用のパワーMOSとして横型のパワーMOSを使用した場合は、縦型のパワーMOSに比べてゲート−ドレイン間の帰還容量を小さくすることができるため、スイッチング損失を低減できる。また、pチャネル型の縦型のパワーMOSを使用した場合と同様に、寄生インダクタンスL3,L4を低減できるため、スイッチング損失をさらに低減できる。
本実施の形態3では、非絶縁型DC−DCコンバータを構成する3つの半導体チップが1パッケージ内に収容されている場合の構成について説明する。
本実施の形態4では、非絶縁型DC−DCコンバータを構成する3つの半導体チップが1パッケージ内に収容されている場合の構成であって、ハイサイド用のパワーMOSがnチャネル型の横型のパワーMOSで形成されている場合について説明する。
本実施の形態5では、図9に示したパッケージ10Aにおいて、ワイヤWAに代えて、金属からなるリード板を用いた構成について説明する。
本実施の形態6では、リード板がパッケージの表面に露出されている構成について説明する。
本実施の形態7では、パッケージに入力コンデンサを搭載する構成について説明する。
本実施の形態8では、上記入力コンデンサをパッケージ内に収容した構成について説明する。
本実施の形態9では、前記実施の形態3においてワイヤをリード板に変えた場合の構成について説明する。
本実施の形態10では、前記実施の形態9のリード板がパッケージの表面に露出されている構成について説明する。
本実施の形態7では、前記実施の形態10のパッケージ10Gに入力コンデンサCinを搭載する構成について説明する。
本実施の形態12では、入力コンデンサを半導体チップに直接接続する構成について説明する。
本実施の形態13では、前記実施の形態3において入力コンデンサを半導体チップに直接接続する構成について説明する。
本実施の形態14では、入力コンデンサを内蔵するパッケージにおいてダイパッドが露出する主面とは反対側の裏面がパッケージの実装面とされている構成について説明する。
本実施の形態15では、入力コンデンサを外付けしたパッケージにおいてダイパッドが露出する主面とは反対側の裏面がパッケージの実装面とされている構成について説明する。
2 制御回路
3 ドライバ回路
4 負荷回路
5a 半導体チップ
5a2 半導体チップ(第1半導体チップ)
5b 半導体チップ(第2半導体チップ)
5c 半導体チップ
6 封止体
7a1,7a2 ダイパッド
7a3 ダイパッド(第2チップ搭載部)
7a4 ダイパッド(第1チップ搭載部)
7a5 ダイパッド(第1チップ搭載部)
7b1〜7b5 リード
7bg1、7bg2 リード
10A〜10k,10m パッケージ
12a,12b ゲートフィンガ
13a,13b,13c 開口部
14n n型の半導体領域
14p p型の半導体領域
15p p+型の半導体領域
15n n+型の半導体領域
16 溝
17 ゲート絶縁膜
18HG1,18HG2 ゲート電極
18L ゲート配線
19a,19b,19c 絶縁層
20a,20b,20c コンタクトホール
21 溝
22n n+型の半導体領域
22p p+型の半導体領域
26a n+型の半導体領域
26b1 n−型の半導体領域
26b2 n+型半導体領域
27a p+型の半導体領域
28SL ソース用の配線
28DL ドレイン用の配線
29a,29b スルーホール
30a〜30h リード板
31 接合層
32 凹み
33 放熱フィン
34 接合層
35a 電極
35b 内部電極
35c 誘電体
36 接合層
37 配線基板
37a〜37e 配線
37g 導体パターン
37h 導体部
37i 導体パターン
37j 開口部
38,39 パッケージ
38a リード
40a,40b チップ部品
42 接合層
50 配線基板
QH1,QH2 パワーMOS・FET
QL1 パワーMOS・FET
Cin 入力コンデンサ
Cout 出力コンデンサ
L コイル
L1〜L6 寄生インダクタンス
D ドレイン
S ソース
GH,GL ゲート端子
VIN 入力電源
VDIN 入力電源
ET1,ET2 端子
Lx 出力ノード
Dp1,Dp2 寄生ダイオード
W,WA1,WA2 ボンディングワイヤ
WB ボンディングワイヤ
HSP,HGP,HDP ボンディングパッド
LSP.LGP ボンディングパッド
PR 表面保護膜
NWL1 n型ウエル領域
PWL1 p型ウエル領域
FLD フィールド絶縁膜
Ds ショットキーバリアダイオード
Claims (20)
- (a)第1主面およびその反対側の第2主面を持つ第1チップ搭載部と、
(b)前記第1チップ搭載部の周囲に配置され、かつ、第1の電源電位を供給する第1外部端子と、
(c)前記第1チップ搭載部の周囲に配置され、かつ、第1の電源電位よりも低い第2の電源電位を供給する第2外部端子と、
(d)前記第1チップ搭載部と一体的に形成された出力用の外部端子と、
(e)前記第1チップ搭載部の第1主面に搭載され、かつ、前記第1外部端子と前記出力用の外部端子との間にソース・ドレイン経路が直列接続された第1半導体チップと、
(f)前記第1チップ搭載部の第1主面に搭載され、かつ、前記出力用の外部端子と前記第2外部端子との間にソース・ドレイン経路が直列接続された第2半導体チップと、
(g)前記第1半導体チップの主面に形成された電極を前記第1外部端子に電気的に接続するワイヤと、
(h)前記第2半導体チップの主面に形成された電極を前記第2外部端子に電気的に接続するワイヤと、
(i)前記第1半導体チップ、前記第2半導体チップおよび前記ワイヤを封止する封止体とを有し、
前記第1半導体チップには、pチャネル型の第1電界効果トランジスタが形成され、
前記第2半導体チップには、nチャネル型の第2電界効果トランジスタが形成され、
前記第1電界効果トランジスタは、
第1面と第2面とを有する半導体基板と、
前記半導体基板の前記第1面から前記第2面に向って形成された溝と、
前記溝の内壁面に形成されたゲート絶縁膜と、
前記ゲート絶縁膜上に形成されたゲート電極と、
前記第1面に形成され、かつ、前記ゲート電極の両端に形成されたソース用のp型の半導体領域と、
前記ゲート電極の側面に形成され、かつ、前記ソース及びドレイン用の半導体領域間に形成されたチャネル形成用のn型の半導体領域により形成され、
前記第2電界効果トランジスタは、
第1面と第2面とを有する半導体基板と、
前記半導体基板の前記第1面から前記第2面に向って形成された溝と、
前記溝の内壁面に形成されたゲート絶縁膜と、
前記ゲート絶縁膜上に形成されたゲート電極と、
前記第1面に形成され、かつ、前記ゲート電極の両端に形成されたソース用のn型の半導体領域と、
前記ゲート電極の側面に形成され、かつ、前記ソース及びドレイン用の半導体領域間に形成されたチャネル形成用のp型の半導体領域と、
前記第2面に形成されたドレイン用の半導体領域により形成され、
前記第1半導体チップは前記第1チップ搭載部の中心よりも前記第1外部端子に寄せて配置されていることを特徴とする半導体装置。 - 請求項1記載の半導体装置において、前記封止体内には、前記第1電界効果トランジスタおよび前記第2電界効果トランジスタの動作を制御する制御回路が収容されていることを特徴とする半導体装置。
- 請求項2記載の半導体装置において、前記制御回路は、前記第1、第2半導体チップとは分離された別の第3半導体チップに形成されており、前記第3半導体チップは、前記第1チップ搭載部とは分離された別の第2チップ搭載部に搭載されていることを特徴とする半導体装置。
- (a)第1主面およびその反対側の第2主面を持つ第1チップ搭載部と、
(b)前記第1チップ搭載部の周囲に配置され、かつ、第1の電源電位を供給する第1外部端子と、
(c)前記第1チップ搭載部の周囲に配置され、かつ、第1の電源電位よりも低い第2の電源電位を供給する第2外部端子と、
(d)前記第1チップ搭載部と一体的に形成された出力用の外部端子と、
(e)前記第1チップ搭載部の第1主面に搭載され、かつ、前記第1外部端子と前記出力用の外部端子との間にソース・ドレイン経路が直列接続された第1半導体チップと、
(f)前記第1チップ搭載部の第1主面に搭載され、かつ、前記出力用の外部端子と前記第2外部端子との間にソース・ドレイン経路が直列接続された第2半導体チップと、
(g)前記第1半導体チップの主面に形成された電極を前記第1外部端子に電気的に接続する第1リード板と、
(h)前記第2半導体チップの主面に形成された電極を前記第2外部端子に電気的に接続する第2リード板と、
(i)前記第1半導体チップおよび前記第2半導体チップを封止する封止体とを有し、
前記第1半導体チップには、pチャネル型の第1電界効果トランジスタが形成され、
前記第2半導体チップには、nチャネル型の第2電界効果トランジスタが形成され、
前記第1電界効果トランジスタは、
第1面と第2面とを有する半導体基板と、
前記半導体基板の前記第1面から前記第2面に向って形成された溝と、
前記溝の内壁面に形成されたゲート絶縁膜と、
前記ゲート絶縁膜上に形成されたゲート電極と、
前記第1面に形成され、かつ、前記ゲート電極の両端に形成されたソース用のp型の半導体領域と、
前記ゲート電極の側面に形成され、かつ、前記ソース及びドレイン用の半導体領域間に形成されたチャネル形成用のn型の半導体領域により形成され、
前記第2電界効果トランジスタは、
第1面と第2面とを有する半導体基板と、
前記半導体基板の前記第1面から前記第2面に向って形成された溝と、
前記溝の内壁面に形成されたゲート絶縁膜と、
前記ゲート絶縁膜上に形成されたゲート電極と、
前記第1面に形成され、かつ、前記ゲート電極の両端に形成されたソース用のn型の半導体領域と、
前記ゲート電極の側面に形成され、かつ、前記ソース及びドレイン用の半導体領域間に形成されたチャネル形成用のp型の半導体領域と、
前記第2面に形成されたドレイン用の半導体領域により形成され、
前記第1半導体チップは前記第1チップ搭載部の中心よりも前記第1外部端子に寄せて配置されていることを特徴とする半導体装置。 - 請求項4記載の半導体装置において、前記第1リード板には第1接合層を介してコンデンサの一方の電極が電気的に接続され、前記第2リード板には第2接合層を介して前記コンデンサの他方の電極が電気的に接続されていることを特徴とする半導体装置。
- 請求項5記載の半導体装置において、前記コンデンサの電極と前記第1、第2リード板とを接合する第1、第2接合層の融点は、前記第1リード板と前記第1半導体チップの電極および前記第1外部端子とを接合する第3接合層および前記第2リード板と前記第2半導体チップの電極および前記第2外部端子とを接合する第4接合層の融点よりも低いことを特徴とする半導体装置。
- 請求項6記載の半導体装置において、前記第1、第2接合層は鉛−錫半田からなり、前記第3、第4接合層は金からなることを特徴とする半導体装置。
- 請求項5記載の半導体装置において、前記第1リード板および前記第2リード板は、一部が前記封止体から露出されており、前記コンデンサは、前記封止体の前記第1リード板および前記第2リード板の露出表面に搭載されていることを特徴とする半導体装置。
- 請求項5記載の半導体装置において、前記第1リード板および前記第2リード板は、全体が前記封止体に覆われており、前記コンデンサは、前記封止体内に内蔵されていることを特徴とする半導体装置。
- 請求項4記載の半導体装置において、前記第1リード板および前記第2リード板の前記
封止体に接する面に凹みが形成されていることを特徴とする半導体装置。 - (a)第1主面およびその反対側の第2主面を持つ第1チップ搭載部と、
(b)前記第1チップ搭載部の周囲に配置され、かつ、第1の電源電位を供給する第1外部端子と、
(c)前記第1チップ搭載部の周囲に配置され、かつ、第1の電源電位よりも低い第2の電源電位を供給する第2外部端子と、
(d)前記第1チップ搭載部と一体的に形成された出力用の外部端子と、
(e)前記第1チップ搭載部の第1主面に搭載され、かつ、前記第1外部端子と前記出力用の外部端子との間にソース・ドレイン経路が直列接続された第1半導体チップと、
(f)前記第1チップ搭載部の第1主面に搭載され、かつ、前記出力用の外部端子と前記第2外部端子との間にソース・ドレイン経路が直列接続された第2半導体チップと、
(g)前記第1半導体チップの主面に形成された電極を前記第1外部端子に電気的に接続するワイヤと、
(h)前記第2半導体チップの主面に形成された電極を前記第2外部端子に電気的に接続するワイヤと、
(i)前記第1半導体チップ、前記第2半導体チップおよび前記ワイヤを封止する封止体とを有し、
前記第1半導体チップには、nチャネル型の第1電界効果トランジスタが形成され、
前記第2半導体チップには、nチャネル型の第2電界効果トランジスタが形成され、
前記第1電界効果トランジスタは、
第1面と第2面とを有する半導体基板と、
前記半導体基板の前記第1面上に形成されたゲート絶縁膜と、
前記ゲート絶縁膜上に形成されたゲート電極と、
前記第1面に形成され、かつ、前記ゲート電極の両端に形成されたソース及びドレイン用のn型の半導体領域と、
前記ゲート電極の下面に形成され、かつ、前記ソース及びドレイン用の半導体領域間に形成されたチャネル形成用のp型の半導体領域により形成され、
前記第2電界効果トランジスタは、
第1面と第2面とを有する半導体基板と、
前記半導体基板の前記第1面から前記第2面に向って形成された溝と、
前記溝の内壁面に形成されたゲート絶縁膜と、
前記ゲート絶縁膜上に形成されたゲート電極と、
前記第1面に形成され、かつ、前記ゲート電極の両端に形成されたソース用のn型の半導体領域と、
前記ゲート電極の側面に形成され、かつ、前記ソース及びドレイン用の半導体領域間に形成されたチャネル形成用のp型の半導体領域と、
前記第2面に形成されたドレイン用の半導体領域により形成され、
前記第1半導体チップは前記第1チップ搭載部の中心よりも前記第1外部端子に寄せて配置されていることを特徴とする半導体装置。 - 請求項11記載の半導体装置において、前記封止体内には、前記第1電界効果トランジスタおよび前記第2電界効果トランジスタの動作を制御する制御回路が収容されていることを特徴とする半導体装置。
- 請求項12記載の半導体装置において、前記制御回路は、前記第1、第2半導体チップとは分離された別の第3半導体チップに形成されており、前記第3半導体チップは、前記第1チップ搭載部とは分離された別の第2チップ搭載部に搭載されていることを特徴とする半導体装置。
- (a)第1主面およびその反対側の第2主面を持つ第1チップ搭載部と、
(b)前記第1チップ搭載部の周囲に配置され、かつ、第1の電源電位を供給する第1外部端子と、
(c)前記第1チップ搭載部の周囲に配置され、かつ、第1の電源電位よりも低い第2の電源電位を供給する第2外部端子と、
(d)前記第1チップ搭載部と一体的に形成された出力用の外部端子と、
(e)前記第1チップ搭載部の第1主面に搭載され、かつ、前記第1外部端子と前記出力用の外部端子との間にソース・ドレイン経路が直列接続された第1半導体チップと、
(f)前記第1チップ搭載部の第1主面に搭載され、かつ、前記出力用の外部端子と前記第2外部端子との間にソース・ドレイン経路が直列接続された第2半導体チップと、
(g)前記第1半導体チップの主面に形成された電極を前記第1外部端子に電気的に接続する第1リード板と、
(h)前記第2半導体チップの主面に形成された電極を前記第2外部端子に電気的に接続する第2リード板と、
(i)前記第1半導体チップおよび前記第2半導体チップを封止する封止体とを有し、
前記第1半導体チップには、nチャネル型の第1電界効果トランジスタが形成され、
前記第2半導体チップには、nチャネル型の第2電界効果トランジスタが形成され、
前記第1電界効果トランジスタは、
第1面と第2面とを有する半導体基板と、
前記半導体基板の前記第1面上に形成されたゲート絶縁膜と、
前記ゲート絶縁膜上に形成されたゲート電極と、
前記第1面に形成され、かつ、前記ゲート電極の両端に形成されたソース及びドレイン用のn型の半導体領域と、
前記ゲート電極の下面に形成され、かつ、前記ソース及びドレイン用の半導体領域間に形成されたチャネル形成用のp型の半導体領域により形成され、
前記第2電界効果トランジスタは、
第1面と第2面とを有する半導体基板と、
前記半導体基板の前記第1面から前記第2面に向って形成された溝と、
前記溝の内壁面に形成されたゲート絶縁膜と、
前記ゲート絶縁膜上に形成されたゲート電極と、
前記第1面に形成され、かつ、前記ゲート電極の両端に形成されたソース用のn型の半導体領域と、
前記ゲート電極の側面に形成され、かつ、前記ソース及びドレイン用の半導体領域間に形成されたチャネル形成用のp型の半導体領域と、
前記第2面に形成されたドレイン用の半導体領域により形成され、
前記第1半導体チップは、前記第1チップ搭載部の中心よりも前記第1外部端子に寄せて配置されていることを特徴とする半導体装置。 - 請求項14記載の半導体装置において、前記第1リード板には第1接合層を介してコンデンサの一方の電極が電気的に接続され、前記第2リード板には第2接合層を介して前記コンデンサの他方の電極が電気的に接続されていることを特徴とする半導体装置。
- 請求項15記載の半導体装置において、前記コンデンサの電極と前記第1、第2リード板とを接合する第1、第2接合層の融点は、前記第1リード板と前記第1半導体チップの電極および前記第1外部端子とを接合する第3接合層および前記第2リード板と前記第2半導体チップの電極および前記第2外部端子とを接合する第4接合層の融点よりも低いことを特徴とする半導体装置。
- 請求項16記載の半導体装置において、前記第1、第2接合層は鉛−錫半田からなり、前記第3、第4接合層は金からなることを特徴とする半導体装置。
- 請求項15記載の半導体装置において、前記第1リード板および前記第2リード板は、一部が前記封止体から露出されており、前記コンデンサは、前記封止体の前記第1リード板および前記第2リード板の露出表面に搭載されていることを特徴とする半導体装置。
- 請求項15記載の半導体装置において、前記第1リード板および前記第2リード板は、全体が前記封止体に覆われており、前記コンデンサは、前記封止体内に内蔵されていることを特徴とする半導体装置。
- 請求項14記載の半導体装置において、前記第1リード板および前記第2リード板において前記封止体と接する面に凹みが形成されていることを特徴とする半導体装置。
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US11/863,556 US7535741B2 (en) | 2004-11-30 | 2007-09-28 | Semiconductor device |
US12/430,972 US7852651B2 (en) | 2004-11-30 | 2009-04-28 | Semiconductor device |
US12/912,796 US8064235B2 (en) | 2004-11-30 | 2010-10-27 | Semiconductor device |
US13/293,194 US8345458B2 (en) | 2004-11-30 | 2011-11-10 | Semiconductor device |
US13/727,680 US20160109896A9 (en) | 2004-11-30 | 2012-12-27 | Semiconductor device |
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JPWO2020080215A1 (ja) * | 2018-10-15 | 2021-09-16 | ローム株式会社 | 半導体装置 |
JP7252248B2 (ja) | 2018-10-15 | 2023-04-04 | ローム株式会社 | 半導体装置 |
US11842949B2 (en) | 2018-10-15 | 2023-12-12 | Rohm Co., Ltd. | Semiconductor device |
CN112805829B (zh) * | 2018-10-15 | 2024-03-08 | 罗姆股份有限公司 | 半导体装置 |
WO2024116924A1 (ja) * | 2022-12-02 | 2024-06-06 | ローム株式会社 | 半導体装置、および、半導体装置の製造方法 |
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US20090207640A1 (en) | 2009-08-20 |
US7295453B2 (en) | 2007-11-13 |
US20160109896A9 (en) | 2016-04-21 |
US20110037450A1 (en) | 2011-02-17 |
JP4426955B2 (ja) | 2010-03-03 |
US7535741B2 (en) | 2009-05-19 |
US7852651B2 (en) | 2010-12-14 |
US20060113664A1 (en) | 2006-06-01 |
US20080023758A1 (en) | 2008-01-31 |
US8345458B2 (en) | 2013-01-01 |
US8064235B2 (en) | 2011-11-22 |
US20120049290A1 (en) | 2012-03-01 |
US20130106388A1 (en) | 2013-05-02 |
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