JP5996465B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP5996465B2 JP5996465B2 JP2013058839A JP2013058839A JP5996465B2 JP 5996465 B2 JP5996465 B2 JP 5996465B2 JP 2013058839 A JP2013058839 A JP 2013058839A JP 2013058839 A JP2013058839 A JP 2013058839A JP 5996465 B2 JP5996465 B2 JP 5996465B2
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- 239000004065 semiconductor Substances 0.000 title claims description 106
- 239000003990 capacitor Substances 0.000 claims description 28
- 230000004888 barrier function Effects 0.000 claims description 26
- 230000015556 catabolic process Effects 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 11
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 9
- 230000003071 parasitic effect Effects 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 22
- 230000000694 effects Effects 0.000 description 11
- 229910002601 GaN Inorganic materials 0.000 description 9
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 238000010992 reflux Methods 0.000 description 6
- 230000006378 damage Effects 0.000 description 4
- 230000001052 transient effect Effects 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 208000032368 Device malfunction Diseases 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000005533 two-dimensional electron gas Effects 0.000 description 1
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- H03K17/0814—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit
- H03K17/08148—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit in composite switches
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Description
本実施形態の半導体装置は、ソース端子と、ドレイン端子と、ゲート端子を備える。そして、ソース端子に接続される第1のソース、第1のドレイン、ゲート端子に接続される第1のゲートを有するノーマリーオフトランジスタと、第1のドレインに接続される第2のソース、ドレイン端子に接続される第2のドレイン、第2のゲートを有するノーマリーオントランジスタと、ゲート端子と第2のゲート間に設けられるコンデンサと、コンデンサと第2のゲート間に接続される第1のアノードと、第1のソースに接続される第1のカソードを有する第1のダイオードと、を備える。
まず、オン状態においては、ソース端子100には0V、ドレイン端子200には正の電圧、例えば、オン抵抗とドレイン電流の積が印加される。そして、ゲート端子300には正の電圧、例えば、10Vが印加される。
本実施形態の半導体装置は、複数の第1のダイオードが直列接続される以外は、第1の実施形態と同様である。したがって、第1の実施形態と重複する内容については記述を省略する。
本実施形態の半導体装置は、ゲート端子とコンデンサとの間に一端が接続され、他端が第1のゲートに接続される第1の抵抗素子を、さらに備えること以外は第1の実施形態と同様である。したがって、第1の実施形態と重複する内容については記述を省略する。
本実施形態の半導体装置は、ゲート端子に接続される第2のアノードと、第1のゲートに接続される第2のカソードを有し、ゲート端子と第1のゲートとの間に、第1の抵抗素子と並列に設けられる第2のダイオードを、さらに備えること以外は第3の実施形態と同様である。したがって、第1および第3の実施形態と重複する内容については記述を省略する。
本実施形態の半導体装置は、ゲート端子と、コンデンサおよび第1のゲートとの間に設けられる第2の抵抗素子を、さらに備えること以外は第4の実施形態と同様である。したがって、第4の実施形態と重複する内容については記述を省略する。
本実施形態の半導体装置は、コンデンサと第2のゲートとの間に設けられる第3の抵抗素子を、さらに備えること以外は第4の実施形態と同様である。したがって、第4の実施形態と重複する内容については記述を省略する。
本実施形態の半導体装置は、第1のソースに接続される第3のアノードと、第1のドレインおよび第2のソースに接続される第3のカソードを有し、順方向降下電圧が、ノーマリーオフトランジスタの寄生ボディダイオードの順方向降下電圧よりも低いショットキーバリアダイオードを、さらに備えること以外は第1の実施形態と同様である。したがって、第1の実施形態と重複する内容については記述を省略する。
本実施形態の半導体装置は、第1のソースに接続される第4のアノードと、第1のドレインおよび第2のソースに接続される第4のカソードを有し、ツェナー電圧がノーマリーオントランジスタの第2のソースと第2のゲート間の耐圧よりも低く、ツェナー電圧がノーマリーオフトランジスタのアバランシェ降伏電圧よりも低いツェナーダイオードを、さらに備えること以外は第1の実施形態と同様である。したがって、第1の実施形態と重複する内容については記述を省略する。
本実施形態の半導体装置は、第1、第3、第4、第5、第7、第8の実施形態の構成をすべて備える。したがって、第1、第3、第4、第5、第7、第8の実施形態と重複する内容の記載は省略する。
本実施形態の半導体装置は、基板、ソースのリード線、ドレインのリード線、ゲートのリード線を備える。基板上に、ノーマリーオフトランジスタ、ノーマリーオントランジスタ、コンデンサ、第1のダイオードが実装され、ソースのリード線側からドレインのリード線側に向けて、ノーマリーオフトランジスタ、ノーマリーオントランジスタの順に配置され、ソースのリード線と、第1のソースおよび第1のカソードが接続され、ドレインのリード線と、第2のドレインが接続される。
11 第1のソース
12 第1のドレイン
13 第1のゲート
20 ノーマリーオントランジスタ
21 第2のソース
22 第2のドレイン
23 第2のゲート
30 第1のダイオード
31 第1のアノード
32 第1のカソード
40 コンデンサ
50 第1の抵抗素子
55 第3の抵抗素子
60 第2のダイオード
61 第2のアノード
62 第2のカソード
70 第2の抵抗素子
80 ショットキーバリアダイオード
81 第3のアノード
82 第3のカソード
85 ツェナーダイオード
86 第4のアノード
87 第4のカソード
90 基板
91 ソースのリード線
92 ドレインのリード線
93 ゲートのリード線
94 放電用のリード線
100 ソース端子
200 ドレイン端子
300 ゲート端子
Claims (11)
- ソース端子に接続される第1のソース、第1のドレイン、ゲート端子に接続される第1のゲートを有するノーマリーオフトランジスタと、
前記第1のドレインに接続される第2のソース、ドレイン端子に接続される第2のドレイン、第2のゲートを有するノーマリーオントランジスタと、
前記ゲート端子と前記第2のゲート間に設けられるコンデンサと、
前記コンデンサと前記第2のゲート間に接続される第1のアノードと、前記第1のソースに接続される第1のカソードを有する第1のダイオードと、
を備えることを特徴とする半導体装置。 - 前記ノーマリーオントランジスタは、GaN系のHEMTであることを特徴とする請求項1記載の半導体装置。
- 前記ゲート端子と前記コンデンサとの間に一端が接続され、他端が前記第1のゲートに接続される第1の抵抗素子を、さらに備えることを特徴とする請求項1または請求項2記載の半導体装置。
- 前記ゲート端子に接続される第2のアノードと、前記第1のゲートに接続される第2のカソードを有し、前記ゲート端子と前記第1のゲートとの間に、前記第1の抵抗素子と並列に設けられる第2のダイオードを、さらに備えることを特徴とする請求項3記載の半導体装置。
- 前記ゲート端子と、前記コンデンサおよび前記第1のゲートとの間に設けられる第2の抵抗素子を、さらに備えることを特徴とする請求項1ないし請求項4いずれか一項記載の半導体装置。
- 前記コンデンサと前記第2のゲートとの間に設けられる第3の抵抗素子を、さらに備えることを特徴とする請求項3記載の半導体装置。
- 前記コンデンサの容量が、前記ノーマリーオントランジスタの入力容量の10倍以上であることを特徴とする請求項1ないし請求項6いずれか一項記載の半導体装置。
- 前記第1のソースに接続される第3のアノードと、前記第1のドレインおよび前記第2のソースに接続される第3のカソードを有し、順方向降下電圧が、前記ノーマリーオフトランジスタの寄生ボディダイオードの順方向降下電圧よりも低いショットキーバリアダイオードを、さらに備えることを特徴とする請求項1ないし請求項7いずれか一項記載の半導体装置。
- 前記第1のソースに接続される第4のアノードと、前記第1のドレインおよび前記第2のソースに接続される第4のカソードを有し、ツェナー電圧が前記ノーマリーオントランジスタの前記第2のソースと前記第2のゲート間の耐圧よりも低く、前記ツェナー電圧が前記ノーマリーオフトランジスタのアバランシェ降伏電圧よりも低いツェナーダイオードを、さらに備えることを特徴とする請求項1ないし請求項8いずれか一項記載の半導体装置。
- 前記ノーマリーオフトランジスタがSiの縦型MOSFETであることを特徴とする請求項1ないし請求項9いずれか一項記載の半導体装置。
- 基板、ソースのリード線、ドレインのリード線、ゲートのリード線をさらに備え、
前記基板上に、前記ノーマリーオフトランジスタ、前記ノーマリーオントランジスタ、前記コンデンサ、前記第1のダイオードが実装され、
前記ソースのリード線側から前記ドレインのリード線側に向けて、前記ノーマリーオフトランジスタ、前記ノーマリーオントランジスタの順に配置され、
前記ソースのリード線と、前記第1のソースおよび前記第1のカソードが接続され、
前記ドレインのリード線と、前記第2のドレインが接続されることを特徴とする請求項1ないし請求項10いずれか一項記載の半導体装置。
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