JP7330155B2 - 半導体装置及び半導体回路 - Google Patents
半導体装置及び半導体回路 Download PDFInfo
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- 238000002347 injection Methods 0.000 description 20
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- 230000000052 comparative effect Effects 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 230000004048 modification Effects 0.000 description 8
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- 229910052814 silicon oxide Inorganic materials 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000007257 malfunction Effects 0.000 description 5
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 5
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- 239000002184 metal Substances 0.000 description 4
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- 238000004458 analytical method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 238000001004 secondary ion mass spectrometry Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
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Description
第1の実施形態の半導体装置は、第1の電極と、第2の電極と、第1のゲート電極と、第2のゲート電極と、第1の面と、第1の面と対向する第2の面を有する半導体層であって、第1導電形の第1の半導体領域と、第1の半導体領域と第1の面との間に設けられ、第1のゲート電極と対向する第2導電形の第2の半導体領域と、第2の半導体領域と第1の面との間に設けられ、第1の電極と接する第1導電形の第3の半導体領域と、第1の半導体領域と第2の面との間に設けられ、第2のゲート電極と対向し、第2の電極と接する第2導電形の第4の半導体領域と、第4の半導体領域と第2の面との間に設けられ、第2の電極と接する第1導電形の第5の半導体領域と、を有する半導体層と、を備え、第1のゲート電極を含み、第1の半導体領域と第3の半導体領域との間の導通を制御する第1のトランジスタは第1の閾値電圧を有し、第2のゲート電極を含み、第1の半導体領域と第5の半導体領域との間の導通を制御する第2のトランジスタは、第1の閾値電圧と正負の符号が同一であり、第1の閾値電圧の絶対値と絶対値の異なる第2の閾値電圧を有する。さらに、第2の閾値電圧の絶対値は第1の閾値電圧の絶対値よりも小さい。
第2の実施形態の半導体装置及び半導体回路は、第2の閾値電圧の絶対値は第1の閾値電圧の絶対値よりも大きい点で、第1の実施形態の半導体装置及び半導体回路と異なる。以下、第1の実施形態と重複する内容については一部記述を省略する場合がある。
第3の実施形態の半導体装置及び半導体回路は、第1のトランジスタがプレーナゲート型のトランジスタである点で、第1の実施形態及び第2の実施形態の半導体装置及び半導体回路と異なる。以下、第1の実施形態及び第2の実施形態と重複する内容については一部記述を省略する場合がある。
第4の実施形態の半導体装置及び半導体回路は、第3のゲート電極を更に備え、第4の半導体領域が第3のゲート電極と対向し、第3のゲート電極を含む第3のトランジスタは第1の閾値電圧と正負の符号が同一であり、第2の閾値電圧の絶対値と異なる絶対値の第3の閾値電圧を有する点で、第1の実施形態の半導体装置及び半導体回路と異なる。さらに、第2のゲート電極と対向する第4の半導体領域の第1の部分の導電形不純物の濃度は、第3のゲート電極と対向する第4の半導体領域の第2の部分の導電形不純物の濃度と異なる。以下、第1の実施形態と重複する内容については一部記述を省略する場合がある。
第5の実施形態の半導体装置及び半導体回路は、第3のゲート絶縁膜の膜厚が第2のゲート絶縁膜の膜厚よりも厚い点で、第4の実施形態の半導体装置及び半導体回路と異なる。以下、第4の実施形態と重複する内容については一部記述を省略する場合がある。
第6の実施形態の半導体装置及び半導体回路は、第3のゲート絶縁膜の材料が、第2のゲート絶縁膜の材料と異なる材料である点で、第4の実施形態の半導体装置及び半導体回路と異なる。以下、第4の実施形態と重複する内容については一部記述を省略する場合がある。
第7の実施形態の半導体装置及び半導体回路は、第2のゲート電極と第3のゲート電極とが連続している点で、第4の実施形態の半導体装置及び半導体回路と異なる。以下、第4の実施形態と重複する内容については一部記述を省略する場合がある。
12 エミッタ電極(第1の電極)
14 コレクタ電極(第2の電極)
16 メインゲート電極(第1のゲート電極)
18 コントロールゲート電極(第2のゲート電極)
18a 第1のコントロールゲート電極(第2のゲート電極)
18b 第2のコントロールゲート電極(第3のゲート電極)
28 裏面ドレイン領域(第5の半導体領域)
30 コレクタ領域(第4の半導体領域)
30a 第1の部分
30b 第2の部分
34 ドリフト領域(第1の半導体領域)
36 ベース領域(第2の半導体領域)
38 エミッタ領域(第3の半導体領域)
100 IGBT(半導体装置)
101 メイントランジスタ(第1のトランジスタ)
102 第1のコントロールトランジスタ(第2のトランジスタ)
103 第2のコントロールトランジスタ(第3のトランジスタ)
150 制御回路
200 IGBT(半導体装置)
300 IGBT(半導体装置)
400 IGBT(半導体装置)
500 IGBT(半導体装置)
600 IGBT(半導体装置)
700 IGBT(半導体装置)
1000 半導体回路
2000 半導体回路
P1 第1の面
P2 第2の面
Von1 第1のターンオン電圧
Von2 第2のターンオン電圧
Vth1 第1の閾値電圧
Vth2 第2の閾値電圧
Vth3 第3の閾値電圧
Claims (9)
- 第1の電極と、
第2の電極と、
第1のゲート電極と、
第2のゲート電極と、
第1の面と、前記第1の面と対向する第2の面を有する半導体層であって、
第1導電形の第1の半導体領域と、
前記第1の半導体領域と前記第1の面との間に設けられ、前記第1のゲート電極と対向する第2導電形の第2の半導体領域と、
前記第2の半導体領域と前記第1の面との間に設けられ、前記第1の電極と接する第1導電形の第3の半導体領域と、
前記第1の半導体領域と前記第2の面との間に設けられ、前記第2のゲート電極と対向し、前記第2の電極と接する第2導電形の第4の半導体領域と、
前記第4の半導体領域と前記第2の面との間に設けられ、前記第2の電極と接する第1導電形の第5の半導体領域と、
を有する半導体層と、
を備え、
前記第1のゲート電極を含み、前記第1の半導体領域と前記第3の半導体領域との間の導通を制御する第1のトランジスタは第1の閾値電圧を有し、
前記第2のゲート電極を含み、前記第1の半導体領域と前記第5の半導体領域との間の導通を制御する第2のトランジスタは、前記第1の閾値電圧と正負の符号が同一であり、前記第1の閾値電圧の絶対値と絶対値の異なる第2の閾値電圧を有する半導体装置。 - 前記第2の閾値電圧の絶対値は、前記第1の閾値電圧の絶対値の0.2倍以上5倍以下である請求項1記載の半導体装置。
- 前記第2の閾値電圧の絶対値は、前記第1の閾値電圧の絶対値よりも小さい請求項1又は請求項2記載の半導体装置。
- 前記第2の閾値電圧の絶対値は、前記第1の閾値電圧の絶対値よりも大きい請求項1又は請求項2記載の半導体装置。
- 第3のゲート電極を更に備え、
前記第4の半導体領域が前記第3のゲート電極と対向し、
前記第3のゲート電極を含む第3のトランジスタは、前記第1の閾値電圧と正負の符号が同一であり、前記第2の閾値電圧の絶対値と絶対値の異なる第3の閾値電圧を有する請求項1ないし請求項4いずれか一項記載の半導体装置。 - 前記第2のゲート電極と対向する前記第4の半導体領域の第1の部分の導電形不純物の濃度は、前記第3のゲート電極と対向する前記第4の半導体領域の第2の部分の導電形不純物の濃度と異なる請求項5記載の半導体装置。
- 第1の電極と、
第2の電極と、
第1のゲート電極と、
第2のゲート電極と、
第1の面と、前記第1の面と対向する第2の面を有する半導体層であって、
第1導電形の第1の半導体領域と、
前記第1の半導体領域と前記第1の面との間に設けられ、前記第1のゲート電極と対向する第2導電形の第2の半導体領域と、
前記第2の半導体領域と前記第1の面との間に設けられ、前記第1の電極と接する第1導電形の第3の半導体領域と、
前記第1の半導体領域と前記第2の面との間に設けられ、前記第2のゲート電極と対向し、前記第2の電極と接する第2導電形の第4の半導体領域と、
前記第4の半導体領域と前記第2の面との間に設けられ、前記第2の電極と接する第1導電形の第5の半導体領域と、
を有する半導体層と、
前記第1のゲート電極に第1のターンオン電圧を印加し、前記第2のゲート電極に前記第1のターンオン電圧の絶対値と絶対値の異なる第2のターンオン電圧を印加する制御回路と、
を備える半導体回路。 - 前記第2のターンオン電圧の絶対値は、前記第1のターンオン電圧の絶対値よりも小さい請求項7記載の半導体回路。
- 前記第2のターンオン電圧の絶対値は、前記第1のターンオン電圧の絶対値よりも大きい請求項7記載の半導体回路。
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