JP4426955B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
- Publication number
- JP4426955B2 JP4426955B2 JP2004345798A JP2004345798A JP4426955B2 JP 4426955 B2 JP4426955 B2 JP 4426955B2 JP 2004345798 A JP2004345798 A JP 2004345798A JP 2004345798 A JP2004345798 A JP 2004345798A JP 4426955 B2 JP4426955 B2 JP 4426955B2
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- Prior art keywords
- power mos
- semiconductor chip
- package
- pad
- semiconductor device
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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 (13)
- DC−DCコンバータを含む半導体装置であって、
前記DC−DCコンバータのハイサイドスイッチとして動作するpチャネル型の第1のパワーMOS・FETを含む第1半導体チップと、
前記DC−DCコンバータのローサイドスイッチとして動作するnチャネル型の第2のパワーMOS・FETを含む第2半導体チップと、
前記第1のパワーMOS・FETおよび前記第2のパワーMOS・FETのゲートを制御するドライバ回路を含む第3半導体チップと、
前記第1半導体チップおよび前記第2半導体チップが搭載された金属性の第1チップ搭載部と、
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第3半導体チップを覆う樹脂封止体と、
前記樹脂封止体から露出した電源供給用の第1外部端子、基準電位供給用の第2外部端子、および、出力用の第3外部端子とを含み、
前記第1半導体チップは、その上面に前記第1のパワーMOS・FETのソース電極用のパッド、および、ゲート電極用のパッドを有し、かつ、前記上面と反対側の裏面にドレイン電極を有し、
前記第2半導体チップは、その上面に前記第2のパワーMOS・FETのソース電極用のパッド、および、ゲート電極用のパッドを有し、かつ、前記上面と反対側の裏面にドレイン電極を有し、
前記電源供給用の第1外部端子は、前記第1のパワーMOS・FETの前記ソース電極用のパッドと電気的に接続され、
前記基準電位供給用の第2外部端子は、前記第2のパワーMOS・FETの前記ソース電極用のパッドと電気的に接続され、
前記出力用の第3外部端子は、前記第1のパワーMOS・FETおよび前記第2のパワーMOS・FETの前記ドレイン電極と電気的に接続され、
前記第1半導体チップおよび前記第2半導体チップの前記裏面は、前記第1チップ搭載部に面するように搭載され、
前記第1のパワーMOS・FETおよび前記第2のパワーMOS・FETの前記ドレイン電極と、前記第1チップ搭載部とは、接合層を介して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1記載の半導体装置において、
前記出力用の第3外部端子は、前記第1チップ搭載部と一体的に形成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、
前記第1チップ搭載部は銅を主成分とす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、
前記接合層は半田であ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、
前記接合層は導電性樹脂であ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、
前記樹脂封止体は、表面および前記表面と反対側の裏面を有し、
前記第1チップ搭載部は前記樹脂封止体の裏面側に位置し、
前記第1チップ搭載部は前記樹脂封止体の裏面から一部露出している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3半導体チップは第2チップ搭載部上に搭載され、
前記第2チップ搭載部は、前記樹脂封止体の前記裏面から一部露出し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、
前記樹脂封止体は表面および前記表面と反対側の裏面を有し、
前記電源供給用の第1外部端子、前記基準電位供給用の第2外部端子、および、前記出力用の第3外部端子は、前記樹脂封止体の前記裏面から露出し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、
前記第1半導体チップの前記ソース電極用のパッドには、複数本の第1のワイヤが接続され、
前記第1半導体チップの前記ソース電極用のパッドと前記電源供給用の第1外部端子とは、前記第1のワイヤを介して電気的に接続され、
前記第2半導体チップの前記ソース電極用のパッドには、複数本の第2のワイヤが接続され、
前記第2半導体チップの前記ソース電極用のパッドと前記基準電位供給用の第2外部端子とは、前記第2のワイヤを介して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ソース電極用のパッドには、第1のリード板が接続され、
前記第1半導体チップの前記ソース電極用のパッドと前記電源供給用の第1外部端子とは、前記第1のリード板を介して電気的に接続され、
前記第2半導体チップの前記ソース電極用のパッドには、第2のリード板が接続され、
前記第2半導体チップの前記ソース電極用のパッドと前記基準電位供給用の第2外部端子とは、前記第2のリード板を介して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ゲート電極用のパッドおよび前記第2半導体チップの前記ゲート電極用のパッドには、それぞれワイヤが接続され、
前記ドライバ回路と、前記第1のパワーMOS・FETの前記ゲート電極用のパッドおよび前記第2のパワーMOS・FETの前記ゲート電極用のパッドとは、それぞれ前記ワイヤを介して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1記載の半導体装置において、
前記第1のパワーMOS・FETおよび前記第2のパワーMOS・FETは、トレンチゲート構造を有し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、
前記半導体装置はQFN構造を有していることを特徴とする半導体装置。
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JP2006156748A (ja) | 2006-06-15 |
US8345458B2 (en) | 2013-01-01 |
US8064235B2 (en) | 2011-11-22 |
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