JP6154292B2 - 半導体装置及び半導体装置の製造方法 - Google Patents
半導体装置及び半導体装置の製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims description 125
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 239000012535 impurity Substances 0.000 claims description 136
- 230000004888 barrier function Effects 0.000 claims description 120
- 210000000746 body region Anatomy 0.000 claims description 99
- 239000000758 substrate Substances 0.000 claims description 59
- 238000002513 implantation Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 16
- 238000005452 bending Methods 0.000 claims description 13
- 241001415830 Bubo Species 0.000 claims 1
- 208000016335 bubo Diseases 0.000 claims 1
- 238000009792 diffusion process Methods 0.000 description 8
- 230000003071 parasitic effect Effects 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
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Description
本明細書または図面に説明した技術要素は、単独であるいは各種の組み合わせによって技術的有用性を発揮するものであり、出願時請求項記載の組み合わせに限定されるものではない。また、本明細書または図面に例示した技術は複数目的を同時に達成するものであり、そのうちの一つの目的を達成すること自体で技術的有用性を持つものである。
12:半導体基板
14:上部電極
16:下部電極
20:エミッタ領域
22:ボディ領域
22a:ボディコンタクト領域
22b:低濃度ボディ領域
22c:角部
24:ピラー領域
26:バリア領域
28:ドリフト領域
30:バッファ領域
32:コレクタ領域
34:アノード領域
34a:アノードコンタクト領域
34b:低濃度アノード領域
36:カソード領域
40:ゲート絶縁膜
42:ゲート電極
44:絶縁膜
50:絶縁膜
52:制御電極
54:絶縁膜
80:下部ボディ領域
90:IGBT領域
92:ダイオード領域
Claims (5)
- 半導体装置であって、
半導体基板と、
前記半導体基板の上面に形成されている上部電極と
前記半導体基板の下面に形成されている下部電極と、
ゲート電極、
を有し、
前記半導体基板内に、
前記上部電極に接続されているn型のエミッタ領域と、
前記エミッタ領域の側方及び下側に形成されており、前記上部電極に接続されているp型のボディ領域と、
前記ボディ領域の側方に形成されており、前記半導体基板の上面から前記ボディ領域の下端の深さまで伸びており、前記上部電極に接続されており、前記ボディ領域によって前記エミッタ領域から分離されているn型のピラー領域と、
前記ボディ領域及び前記ピラー領域の下側に形成されており、前記ボディ領域によって前記エミッタ領域から分離されているn型のバリア領域と、
前記バリア領域の下側に形成されており、前記バリア領域によって前記エミッタ領域から分離されており、前記バリア領域よりもn型不純物濃度が低いn型のドリフト領域と、
前記ドリフト領域の下側に形成されており、前記下部電極に接続されており、前記ドリフト領域によって前記バリア領域から分離されているp型のコレクタ領域と、
前記ドリフト領域の下側に形成されており、前記下部電極に接続されており、前記ドリフト領域によって前記バリア領域から分離されており、前記ドリフト領域よりもn型不純物濃度が高いn型のカソード領域、
が形成されており、
前記半導体基板の上面に、前記エミッタ領域と前記ボディ領域と前記バリア領域を貫通して前記ドリフト領域に達するトレンチが形成されており、
前記トレンチの内面が、ゲート絶縁膜に覆われており、
前記ゲート電極が、前記トレンチ内に配置されており、
前記ピラー領域及び前記ピラー領域の下側の前記バリア領域内における深さ方向のn型不純物濃度分布が、前記ピラー領域内に極大値を有しており、前記ピラー領域の極大値よりも下側に屈曲点を有し、
前記n型不純物濃度分布が、前記バリア領域内に極大値を有する、
半導体装置。 - 半導体装置であって、
半導体基板と、
前記半導体基板の上面に形成されている上部電極と
前記半導体基板の下面に形成されている下部電極と、
ゲート電極、
を有し、
前記半導体基板内に、
前記上部電極に接続されているn型のエミッタ領域と、
前記エミッタ領域の側方及び下側に形成されており、前記上部電極に接続されているp型のボディ領域と、
前記ボディ領域の側方に形成されており、前記半導体基板の上面から前記ボディ領域の下端の深さまで伸びており、前記上部電極に接続されており、前記ボディ領域によって前記エミッタ領域から分離されているn型のピラー領域と、
前記ボディ領域及び前記ピラー領域の下側に形成されており、前記ボディ領域によって前記エミッタ領域から分離されているn型のバリア領域と、
前記バリア領域の下側に形成されており、前記バリア領域によって前記エミッタ領域から分離されており、前記バリア領域よりもn型不純物濃度が低いn型のドリフト領域と、
前記ドリフト領域の下側に形成されており、前記下部電極に接続されており、前記ドリフト領域によって前記バリア領域から分離されているp型のコレクタ領域と、
前記ドリフト領域の下側に形成されており、前記下部電極に接続されており、前記ドリフト領域によって前記バリア領域から分離されており、前記ドリフト領域よりもn型不純物濃度が高いn型のカソード領域、
が形成されており、
前記半導体基板の上面に、前記エミッタ領域と前記ボディ領域と前記バリア領域を貫通して前記ドリフト領域に達するトレンチが形成されており、
前記トレンチの内面が、ゲート絶縁膜に覆われており、
前記ゲート電極が、前記トレンチ内に配置されており、
前記ピラー領域及び前記ピラー領域の下側の前記バリア領域内における深さ方向のn型不純物濃度分布が、前記ピラー領域内に極大値を有しており、前記ピラー領域の極大値よりも下側に屈曲点を有し、
前記バリア領域と前記ドリフト領域の間に、前記バリア領域と前記ドリフト領域を分離しており、前記バリア領域によって前記ボディ領域から分離されており、前記ドリフト領域によって前記コレクタ領域及び前記カソード領域から分離されているp型の下部ボディ領域が形成されている半導体装置。 - 半導体基板と、
前記半導体基板の上面に形成されている上部電極と
前記半導体基板の下面に形成されている下部電極と、
ゲート電極、
を有し、
前記半導体基板内に、
前記上部電極に接続されているn型のエミッタ領域と、
前記エミッタ領域の側方及び下側に形成されており、前記上部電極に接続されているp型のボディ領域と、
前記ボディ領域の側方に形成されており、前記半導体基板の上面から前記ボディ領域の下端の深さまで伸びており、前記上部電極に接続されており、前記ボディ領域によって前記エミッタ領域から分離されているn型のピラー領域と、
前記ボディ領域及び前記ピラー領域の下側に形成されており、前記ボディ領域によって前記エミッタ領域から分離されているn型のバリア領域と、
前記バリア領域の下側に形成されており、前記バリア領域によって前記エミッタ領域から分離されており、前記バリア領域よりもn型不純物濃度が低いn型のドリフト領域と、
前記ドリフト領域の下側に形成されており、前記下部電極に接続されており、前記ドリフト領域によって前記バリア領域から分離されているp型のコレクタ領域と、
前記ドリフト領域の下側に形成されており、前記下部電極に接続されており、前記ドリフト領域によって前記バリア領域から分離されており、前記ドリフト領域よりもn型不純物濃度が高いn型のカソード領域、
が形成されており、
前記半導体基板の上面に、前記エミッタ領域と前記ボディ領域と前記バリア領域を貫通して前記ドリフト領域に達するトレンチが形成されており、
前記トレンチの内面が、ゲート絶縁膜に覆われており、
前記ゲート電極が、前記トレンチ内に配置されている、
半導体装置の製造方法であって、
n型不純物注入によってバリア領域を形成する工程と、
n型不純物注入によってピラー領域を形成する工程、
を有しており、
バリア領域を形成する工程では、ピラー領域を形成する工程においてピラー領域が形成される領域よりも深い位置までn型不純物を分布させる、
製造方法。 - バリア領域を形成する工程では、ピラー領域を形成する工程よりもn型不純物の平均停止位置が深くなるようにn型不純物を注入する請求項3の製造方法。
- p型不純物注入によってボディ領域を形成する工程をさらに有し、
ボディ領域を形成する工程では、ピラー領域を形成する工程においてピラー領域が形成される領域の少なくとも一部をマスキングして、p型不純物を注入する請求項3または4の製造方法。
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