JP7150539B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP7150539B2 JP7150539B2 JP2018173140A JP2018173140A JP7150539B2 JP 7150539 B2 JP7150539 B2 JP 7150539B2 JP 2018173140 A JP2018173140 A JP 2018173140A JP 2018173140 A JP2018173140 A JP 2018173140A JP 7150539 B2 JP7150539 B2 JP 7150539B2
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- 239000004065 semiconductor Substances 0.000 title claims description 265
- 239000012535 impurity Substances 0.000 claims description 54
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
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- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004380 ashing Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
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- 230000007423 decrease Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
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- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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Description
本実施形態の半導体装置は、第1の面と、第2の面と、を有する第1導電型の半導体基板と、第1の面に設けられた第2導電型の第1の半導体領域と、第1の面において、第1の半導体領域の周囲に、第1の半導体領域を囲むように設けられた第2導電型の第2の半導体領域と、第1の面において、第2の半導体領域内に、第1の半導体領域を囲むように設けられ、第2の半導体領域より第2導電型不純物濃度が高い第2導電型の第3の半導体領域と、第2の半導体領域の上に、第1の半導体領域を囲むように設けられ、第3の半導体領域の上に穴を有する第1の絶縁膜と、第1の絶縁膜の上に設けられ、穴を介して第3の半導体領域と電気的に接続された第1の電極と、を備える。
本実施形態の半導体装置においては、第3の半導体領域の内側に設けられた第5の半導体領域は、半導体基板の角部に近い部分に設けられた第8の半導体領域と、第8の半導体領域に隣接して設けられ第2導電型不純物濃度が第8の半導体領域より高い第9の半導体領域と、を有する点で、第1の実施形態と異なっている。ここで、第1の実施形態と重複する点については、記載を省略する。
本実施形態の半導体装置においては、第1の電極は、第1の電極部分と、第1の電極部分に隣接して設けられ、前記第1の電極部分よりも前記半導体基板の端部との距離が長い第2の電極部分と、を有する点で、第1及び第2の実施形態と異なっている。ここで、第1及び第2の実施形態と重複する点については、記載を省略する。
本実施形態の半導体装置は、前記第1の面に設けられた第4の電極(ゲート電極62の一例)と、第4の電極と第1の半導体領域(ベース層68の一例)の間に設けられた第2の絶縁膜(ゲート絶縁膜64の一例)と、第1の半導体領域内において、第1の半導体領域の上に設けられ、半導体基板より第1導電型不純物濃度が高い第10の半導体領域(エミッタ層66の一例)と、第10の半導体領域に電気的に接続された第5の電極(エミッタ電極70の一例)と、半導体基板の第2の面に設けられた第2導電型の第11の半導体領域(コレクタ層74の一例)と、第11の半導体領域に電気的に接続された第6の電極(コレクタ電極76の一例)と、をさらに備える点で、第1乃至第3の実施形態と異なっている。ここで、第1乃至第3の実施形態と重複する点については、記載を省略する。
2a 角部
2b 端部
4 第1の面
6 第2の面
10 アノード電極(第2の電極)
12 第1の絶縁膜
13a 第1の穴(穴)
14 フィールドプレート電極(第1の電極)
14a 第1の電極部分
14b 第2の電極部分
18 ストッパ電極
20 ストッパ層
24 カソード層(第7の半導体領域)
26 カソード電極(第3の電極)
28 p+型半導体領域(第3の半導体領域)
30 n型表面半導体領域(第4の半導体領域)
32 アノード層(第1の半導体領域)
40 p型半導体領域(第2の半導体領域)
42 バラスト抵抗領域(第5の半導体領域)
42a1 第1のバラスト抵抗領域部分(第9の半導体領域)
42a2 第1のバラスト抵抗領域部分(第8の半導体領域)
42b1 第2のバラスト抵抗領域部分
42b2 第2のバラスト抵抗領域部分
44 VLD領域(第6の半導体領域)
62 ゲート電極(第4の電極)
64 ゲート絶縁膜(第2の絶縁膜)
66 エミッタ層(第10の半導体領域)
68 ベース層(第1の半導体領域)
70 エミッタ電極(第5の電極)
74 コレクタ層(第11の半導体領域)
76 第6の電極(コレクタ電極)
90 マスク材
100 半導体装置
110 半導体装置
120 半導体装置
130 半導体装置
200 半導体装置
800 半導体装置
900 半導体装置
Claims (8)
- 第1の面と、第2の面と、を有する第1導電型の半導体基板と、
前記第1の面に設けられた第2導電型の第1の半導体領域と、
前記第1の面において、前記第1の半導体領域の周囲に、前記第1の半導体領域を囲むように設けられ、
前記第1の半導体領域の周囲に、前記第1の半導体領域を囲むように設けられた第5の半導体領域と、
前記第5の半導体領域の周囲に、前記第5の半導体領域を囲むように設けられ、前記第1の面に平行な面内における第2導電型不純物濃度は、前記半導体基板の端部に向かって、前記第5の半導体領域よりも大きな勾配で低くなっている第6の半導体領域と、
を有する第2導電型の第2の半導体領域と、
前記第1の面において、前記第5の半導体領域内に、前記第1の半導体領域を囲むように設けられ、前記第5の半導体領域より第2導電型不純物濃度が高い第2導電型の第3の半導体領域と、
前記第2の半導体領域の上に、前記第1の半導体領域を囲むように設けられ、前記第3の半導体領域の上に穴を有する第1の絶縁膜と、
前記第1の絶縁膜の上に設けられ、前記穴を介して前記第3の半導体領域と電気的に接続された第1の電極であって、前記第1の電極の端部は前記第5の半導体領域と前記第6の半導体領域の間の上に設けられた前記第1の電極と、
を備える半導体装置。 - 前記第1の半導体領域に電気的に接続され、前記第1の電極と離間して設けられた第2の電極をさらに備える請求項1記載の半導体装置。
- 前記第1の面において、前記第1の半導体領域を囲むように設けられ、前記半導体基板より第1導電型不純物濃度が高い第1導電型の第4の半導体領域をさらに備える請求項1又は請求項2記載の半導体装置。
- 前記第2の半導体領域の第2導電型不純物濃度は前記第1の面からの基板深さ方向の所定の距離において最大値を有し、前記所定の距離は前記第4の半導体領域の厚さより長い、請求項3記載の半導体装置。
- 前記第3の半導体領域の内側に設けられた前記第5の半導体領域は、
前記半導体基板の角部に近い部分に設けられた第8の半導体領域と、
前記第8の半導体領域に隣接して設けられ第2導電型不純物濃度が前記第8の半導体領域より高い第9の半導体領域と、
を有する請求項1乃至請求項4いずれか一項記載の半導体装置。 - 前記第1の電極は、
第1の電極部分と、
前記第1の電極部分に隣接して設けられ、前記第1の電極部分よりも前記半導体基板の端部との距離が長い第2の電極部分と、
を有する請求項1乃至請求項5いずれか一項記載の半導体装置。 - 前記第1の半導体領域に電気的に接続され、前記第1の電極と離間して設けられた第2の電極と、
前記半導体基板の第2の面に設けられ第1導電型不純物濃度が前記半導体基板より高い第7の半導体領域と、
前記第7の半導体領域に電気的に接続された第3の電極と、
をさらに備える請求項1乃至請求項6いずれか一項記載の半導体装置。 - 前記第1の面に設けられた第4の電極と、
前記第4の電極と前記第1の半導体領域の間に設けられた第2の絶縁膜と、
前記第1の半導体領域内において、前記第1の半導体領域の上に設けられ、前記半導体基板より第1導電型不純物濃度が高い第10の半導体領域と、
前記第10の半導体領域に電気的に接続された第5の電極と、
前記半導体基板の第2の面に設けられた第2導電型の第11の半導体領域と、
前記第11の半導体領域に電気的に接続された第6の電極と
をさらに備える請求項1乃至請求項6いずれか一項記載の半導体装置。
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