JPWO2019077877A1 - 炭化珪素半導体装置および炭化珪素半導体装置の製造方法 - Google Patents
炭化珪素半導体装置および炭化珪素半導体装置の製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 188
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 146
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 144
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 239000000758 substrate Substances 0.000 claims abstract description 54
- 239000010410 layer Substances 0.000 claims description 82
- 239000002344 surface layer Substances 0.000 claims description 11
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- 239000011229 interlayer Substances 0.000 description 17
- 238000006073 displacement reaction Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 238000005468 ion implantation Methods 0.000 description 7
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000206 photolithography Methods 0.000 description 3
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
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- 229910018520 Al—Si Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 229910052737 gold Inorganic materials 0.000 description 1
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- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
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Abstract
Description
本発明にかかる半導体装置は、ワイドバンドギャップ半導体を用いて構成される。実施の形態においては、ワイドバンドギャップ半導体として例えば炭化珪素(SiC)を用いて作製された炭化珪素半導体装置について、MOSFETを例に説明する。図1は、実施の形態にかかる炭化珪素半導体装置の構造を示す上面図である。図2は、実施の形態にかかる炭化珪素半導体装置の構造を示す図1のA−A’部分の断面図である。
次に、実施の形態にかかる炭化珪素半導体装置の製造方法について説明する。図11〜図14は、実施の形態にかかる炭化珪素半導体装置の製造途中の状態を模式的に示す断面図である。
2、102 n-型炭化珪素エピタキシャル層
3、103 p型ベース層
4、104 n+型ソース領域
5、105 p++型コンタクト領域
6、106 ゲート絶縁膜
7、107 絶縁膜
8、108 ゲート電極
9、109 層間絶縁膜
10、110 ソース電極
11、111 ゲートランナー
12、112 p型領域
13 第2のゲートランナー
14、114 ドレイン電極
15 ゲートコンタクト領域
16、116 ゲート電極パッド
21 n+型炭化珪素基板
22 n-型ドリフト層
23 第1p+型領域
24 第2p+型領域
25 n型領域
26 p型ベース層
27 n+型ソース領域
28 p+型コンタクト領域
29 ゲート絶縁膜
30 ゲート電極
31 層間絶縁膜
32 ソース電極
38 トレンチ
40 炭化珪素半導体基体
201、211 活性領域
202、212 エッジ終端領域
Claims (6)
- 第1導電型の炭化珪素半導体基板と、
前記炭化珪素半導体基板のおもて面に設けられた、前記炭化珪素半導体基板より低不純物濃度の第1導電型の第1半導体層と、
前記第1半導体層の、前記炭化珪素半導体基板側に対して反対側の表面に設けられた第2導電型の第2半導体層と、
前記第2半導体層の、前記炭化珪素半導体基板側に対して反対側の表面層に選択的に設けられた第1導電型の第1半導体領域と、
前記第2半導体層の、前記炭化珪素半導体基板側に対して反対側の表面層に選択的に設けられた、オン状態の時に主電流が流れる表面が矩形の活性領域の周囲を囲む終端領域まで延在する第2導電型の第2半導体領域と、
前記第1半導体領域と前記第1半導体層とに挟まれた前記第2半導体層の表面上の少なくとも一部にゲート絶縁膜を介して設けられたストライプ形状のゲート電極と、
前記第1半導体領域と前記第2半導体層の表面に設けられた第1電極と、
前記炭化珪素半導体基板の裏面に設けられた第2電極と、
前記ゲート電極と電気的に接続するゲートランナーと、
を備え、
前記第2半導体領域は、前記矩形の活性領域の4辺方向に延在し、
前記矩形の活性領域の端部の断面形状は、4辺とも同様の形状を有することを特徴とする炭化珪素半導体装置。 - 前記ゲート電極と前記ゲートランナーとを接続するゲートコンタクト領域を備え、
前記ゲートコンタクト領域が、前記矩形の活性領域の4辺に少なくとも一つ設けられていることを特徴とする請求項1に記載の炭化珪素半導体装置。 - 前記矩形の活性領域には、端部が長い辺と端部が短い辺があり、
前記長い辺には、前記短い辺より前記ゲートコンタクト領域が多く設けられていることを特徴とする請求項2に記載の炭化珪素半導体装置。 - 前記矩形の活性領域には、端部が長い辺と端部が短い辺があり、
前記長い辺に設けられた前記ゲートコンタクト領域は、前記短い辺に設けられた前記ゲートコンタクト領域より面積が広いことを特徴とする請求項2または3に記載の炭化珪素半導体装置。 - 前記矩形の活性領域の4辺に前記ゲートランナーと接続するゲートパッドが設けられていることを特徴とする請求項1〜4のいずれか一つに記載の炭化珪素半導体装置。
- 第1導電型の炭化珪素半導体基板のおもて面に、前記炭化珪素半導体基板より低不純物濃度の第1導電型の第1半導体層を形成する第1工程と、
前記第1半導体層の、前記炭化珪素半導体基板側に対して反対側の表面に第2導電型の第2半導体層を形成する第2工程と、
前記第2半導体層の、前記炭化珪素半導体基板側に対して反対側の表面層に選択的に第1導電型の第1半導体領域を形成する第3工程と、
前記第2半導体層の、前記炭化珪素半導体基板側に対して反対側の表面層に選択的に、オン状態の時に主電流が流れる表面が矩形の活性領域の周囲を囲む終端領域まで延在する第2導電型の第2半導体領域を形成する第4工程と、
前記第1半導体領域と前記第1半導体層とに挟まれた前記第2半導体層の表面上の少なくとも一部にゲート絶縁膜を介してストライプ形状のゲート電極を形成する第5工程と、
前記第1半導体領域と前記第2半導体層の表面に第1電極を形成する第6工程と、
前記炭化珪素半導体基板の裏面に第2電極を形成する第7工程と、
前記ゲート電極と電気的に接続するゲートランナーを形成する第8工程と、
を含み、
前記第4工程では、前記第2半導体領域を、前記矩形の活性領域の4辺方向に延在させ、前記矩形の活性領域の端部の断面形状を、4辺とも同様の形状とすることを特徴とする炭化珪素半導体装置の製造方法。
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005032736A (ja) * | 2002-06-10 | 2005-02-03 | Fuji Electric Holdings Co Ltd | 半導体装置およびその製造方法 |
JP2011054813A (ja) * | 2009-09-03 | 2011-03-17 | Toyota Motor Corp | 縦型半導体装置 |
JP2011171487A (ja) * | 2010-02-18 | 2011-09-01 | Tokyo Electron Ltd | 基板裏面平坦化方法 |
JP2012256662A (ja) * | 2011-06-08 | 2012-12-27 | Yoshitaka Sugawara | 半導体素子および半導体装置 |
JP2015095578A (ja) * | 2013-11-13 | 2015-05-18 | 三菱電機株式会社 | 半導体装置及びその製造方法 |
JP2016009728A (ja) * | 2014-06-23 | 2016-01-18 | トヨタ自動車株式会社 | 半導体装置 |
WO2016047438A1 (ja) * | 2014-09-26 | 2016-03-31 | 三菱電機株式会社 | 半導体装置 |
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US8836028B2 (en) * | 2011-04-27 | 2014-09-16 | Fairchild Semiconductor Corporation | Superjunction structures for power devices and methods of manufacture |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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JP2011054813A (ja) * | 2009-09-03 | 2011-03-17 | Toyota Motor Corp | 縦型半導体装置 |
JP2011171487A (ja) * | 2010-02-18 | 2011-09-01 | Tokyo Electron Ltd | 基板裏面平坦化方法 |
JP2012256662A (ja) * | 2011-06-08 | 2012-12-27 | Yoshitaka Sugawara | 半導体素子および半導体装置 |
JP2015095578A (ja) * | 2013-11-13 | 2015-05-18 | 三菱電機株式会社 | 半導体装置及びその製造方法 |
JP2016009728A (ja) * | 2014-06-23 | 2016-01-18 | トヨタ自動車株式会社 | 半導体装置 |
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