JP2013535831A - 電子パワースイッチのための半導体構造 - Google Patents
電子パワースイッチのための半導体構造 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 159
- 239000000758 substrate Substances 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 239000010410 layer Substances 0.000 claims description 15
- 239000011241 protective layer Substances 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- 229910002601 GaN Inorganic materials 0.000 claims description 3
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000008186 active pharmaceutical agent Substances 0.000 description 11
- 239000000969 carrier Substances 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 238000000407 epitaxy Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005468 ion implantation Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
Description
− 基板の下面に接するドレイン電極、
− 基板の上面に配置される下表面と、接触領域が設けられた上表面とを有する第1の型の導電性の第1半導体領域、
− 第1半導体領域の接触領域に接するソース電極、
− 接触領域の下方で第1半導体領域の内部に配置され、ドレイン電極とソース電極との間で、第1の型の導電性の縦の第1導電チャネルと第1の型の導電性の横の第2導電チャネルとを区切る、第2の型の導電性の第2半導体領域(第1および第2半導体領域はp−n型の第1接合を形成する。)、
− 第1半導体領域の上表面に、接触領域から離れて配置された、第2の型の導電性の第3半導体領域(第1および第3半導体領域はp−n型の第2接合を形成する。)、および
− 第3半導体領域に接触するゲート電極。
半導体構造の電気的性能を変質させる寄生バイポーラ電流をもたらす。この点で、第2p−n接合の存在のために、IDSで示されるドレインとソースの間に流れる電流は非常に制限され、一方、IGSで示されるゲートとソースの間に流れる電流は半導体構造を破損し得るほど非常に大きくなる。
− 基板の下面に接するドレイン電極、
− 基板の上面に配置される下表面、および接触領域が設けられた上表面を有する第1の型の導電性の第1半導体領域、
− 第1半導体領域の接触領域に接するソース電極、および
− ドレイン電極とソース電極との間で、第1の型の導電性の第1および第2導電チャネルを区切るように、接触領域の下方で第1半導体領域の内部に配置される第2の型の導電性の第2半導体領域。
− ショットキー型の第2接合を形成するように、第1半導体領域の上表面に接触する少なくとも1つの第1部分を有する金属の第2ゲート電極。
第2ゲート電極は、誘電体層を越える少なくとも1つの第2部分を有する。
− 基板1の下面10に接するドレイン電極D、
− 基板1の上面11に配置される下表面20、および接触範囲210が設けられた上表面21を有するn型の導電性の第1半導体領域2、
− 第1半導体領域2の接触範囲210に接するソース電極S、
− 接触範囲210の下方で第1半導体領域2の内部に配置され、ドレイン電極Dとソース電極Sとの間で、横の第1導電チャネルC1と縦の第2導電チャネルC2とを区切る、p型(すなわちhole conductor)の導電性の第2半導体領域3(上記第1および第2導電チャネルC1,C2はn型である。)、
− ショットキー型の第1接合を形成するように、第2半導体領域3に接する第1部分70と、第1半導体領域2に接する第2部分71とを有する金属の第1ゲート電極G1、および
− ショットキー型の第2接合を形成するように、第1半導体領域2の上表面21に接触する第1部分40を有する金属の第2ゲート電極G2。上記第2ゲート電極G2は、接触範囲210からは距離を開けて配置される。
b) 好ましくはエピタキシーによって、基板1の上面11の上に第1半導体領域2の第3半導体範囲24を成長させ、
c) 好ましくはエピタキシーによって、第3半導体範囲24の上に第1半導体領域2の第2半導体範囲23を成長させ、
d) 好ましくはイオン注入によって、第2半導体範囲23内に第2半導体領域3をインプラントし、
e) 好ましくはエピタキシーによって、第2半導体範囲23の上に第1半導体領域2の第1半導体範囲22を成長させ、
f) 好ましくはイオン注入によって、第1半導体範囲22内に接触範囲210をインプラントし、
g) 第2半導体領域3が到達されるまで(is attained)第1半導体範囲22の上部をエッチングし、
h) 第1半導体範囲22の上に誘電体層5を堆積させ、
i) 基板1の下面10に金属層を堆積してドレイン電極Dを形成し、
j) 第2半導体領域3の上に金属層を堆積して、第1ゲート電極G1を形成し、
k) 接触範囲210の上に金属層を堆積して、ソース電極Sを形成し、
l) 第1半導体範囲22および誘電体層5の上に金属層を堆積し、それぞれ第2ゲート電極G2の第1および第2部分40,41を形成する。
− 実質的に各第1のパターンの真ん中に配置された第1ゲート電極G1(不図示)の保護セルP。
− 保護セルPは、各第2のパターンの2つの組み合わされたバンドBIの間に配置されている。
Claims (15)
- 電子パワースイッチのための半導体構造であって、
− 下面(10)および上面(11)を有する第1の型の導電性の基板(1)、
− 基板(1)の下面(10)に接するドレイン電極(D)、
− 基板(1)の上面(11)に配置される下表面(20)、および接触範囲(210)が設けられた上表面(21)を有する第1の型の導電性の第1半導体領域(2)、
− 第1半導体領域(2)の接触範囲(210)に接するソース電極(S)、および
− ドレイン電極(D)とソース電極(S)との間で、第1の型の導電性の第1および第2導電チャネル(C1,C2)を区切るように、接触範囲(210)の下方で第1半導体領域(2)の内部に配置される第2の型の導電性の第2半導体領域(3)、
を備え、さらに、
− ショットキー型の第1接合を形成するように、第2半導体領域(3)に接する少なくとも1つの第1部分(70)と、第1半導体領域(2)に接する少なくとも1つの第2部分(71)とを有する金属の第1ゲート電極(G1)、および
− ショットキー型の第2接合を形成するように、第1半導体領域(2)の上表面(21)に接触する少なくとも1つの第1部分(40)を有する金属の第2ゲート電極(G2)を備え、
上記第2ゲート電極(G2)は、接触範囲(210)からは距離を開けて配置されることを特徴とする半導体構造。 - 請求項1の半導体構造であって、
第2半導体領域(3)が、第1ゲート電極(G1)の第2部分(71)の下に配置される第2の型の導電性の少なくとも1つのボックス(30)を含み、各ボックス(30)の両側でショットキー型の第1接合を区切ることを特徴とする半導体構造。 - 請求項2の半導体構造であって、
各ボックス(30)は、第1ゲート電極(G1)とのオーミック接触を形成するのに適した第2の型の導電性のドーピングレベルを有することを特徴とする半導体構造。 - 請求項1から請求項3のうち何れか1項の半導体構造であって、
第1半導体領域(2)の上面(21)は、第2の型の導電性の少なくとも1つのボックスを含み、第2ゲート電極(G2)の第1部分(40)の下に配置され、各ボックスの両側でショットキー型の第2接合を区切ることを特徴とする半導体構造。 - 請求項4の半導体構造であって、
各ボックスは、第2ゲート電極(G2)とのオーミック接触を形成するのに適した第2の型の導電性のドーピングレベルを有することを特徴とする半導体構造。 - 請求項1から請求項5のうち何れか1項の半導体構造であって、
好ましくはシリカから形成され、第1半導体領域(2)の上面(21)の上に配置された誘電体層(5)を含み、
第2ゲート電極(G2)は、誘電体層(5)を越える少なくとも1つの第2部分(41)を有することを特徴とする半導体構造。 - 請求項1から請求項6のうち何れか1項の半導体構造であって、
接触範囲(210)は、ソース電極(S)とのオーミック接触を形成するのに適した第1の型の導電性のドーピングレベルを有していることを特徴とする半導体構造。 - 請求項1から請求項7のうち何れか1項の半導体構造であって、
基板(1)は、ドレイン電極接触範囲(210)とのオーミック接触を形成するのに適した第1の型の導電性のドーピングレベルを有していることを特徴とする半導体構造。 - 請求項1から請求項8のうち何れか1項の半導体構造であって、
第2半導体領域(3)は、第1ゲート電極(G1)とのオーミック接触を形成するのに適した第2の型の導電性のドーピングレベルを有していることを特徴とする半導体構造。 - 請求項1から請求項9のうち何れか1項の半導体構造であって、
第2導電チャネル(C2)は、実質的に鉛直な第2の方向に延び、第1導電チャネル(C1)は、第2の方向に実質的に垂直な第1の方向に延びることを特徴とする半導体構造。 - 請求項1から請求項10のうち何れか1項の半導体構造であって、
第1および第2半導体領域(2,3)の間の接合の周辺に配置された第2の型の導電性の少なくとも1つの保護層(6)を含み、上記保護層(6)は、半導体構造の耐圧の最適化に適したドーピングレベルを有することを特徴とする半導体構造。 - 請求項1から請求項11のうち何れか1項の半導体構造であって、
基板(1)、ならびに第1および第2半導体領域(2,3)は、炭化シリコン、窒化ガリウム、およびダイヤモンドを含むグループから選択される材料、好ましくは炭化シリコンから成ることを特徴とする半導体構造。 - 請求項1から請求項12のうち何れか1項の複数の半導体構造(SC)を含むことを特徴とする電子パワースイッチ。
- 請求項13の電子パワースイッチであって、
複数の半導体構造(SC)が、少なくとも1つの実質的に規則的な六角形の第1のパターン(M)および/または少なくとも1つの組み合わされた第2のバンドパターン(BI)を区切るように配置されたことを特徴とする電子パワースイッチ。 - 請求項14の電子パワースイッチであって、
実質的に、各第1のパターンの真ん中に配置され、および/または各第2のパターンの2つの組み合わされたバンド(BI)の間に配置された第1ゲート電極(G1)の保護セル(P)を含むことを特徴とする電子パワースイッチ。
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JPS5229178A (en) * | 1975-09-01 | 1977-03-04 | Toshiba Corp | Vertical field effect semiconductive device |
JPH07162014A (ja) * | 1993-12-07 | 1995-06-23 | Honda Motor Co Ltd | 半導体装置の製造方法 |
JP2000216407A (ja) * | 1999-01-20 | 2000-08-04 | Fuji Electric Co Ltd | 炭化けい素縦形fetおよびその製造方法 |
JP2005235985A (ja) * | 2004-02-19 | 2005-09-02 | Toshiba Corp | 半導体装置 |
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JP3216804B2 (ja) * | 1998-01-06 | 2001-10-09 | 富士電機株式会社 | 炭化けい素縦形fetの製造方法および炭化けい素縦形fet |
DE10036208B4 (de) * | 2000-07-25 | 2007-04-19 | Siced Electronics Development Gmbh & Co. Kg | Halbleiteraufbau mit vergrabenem Inselgebiet und Konaktgebiet |
US7982239B2 (en) * | 2007-06-13 | 2011-07-19 | Northrop Grumman Corporation | Power switching transistors |
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Publication number | Priority date | Publication date | Assignee | Title |
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JPS5229178A (en) * | 1975-09-01 | 1977-03-04 | Toshiba Corp | Vertical field effect semiconductive device |
JPH07162014A (ja) * | 1993-12-07 | 1995-06-23 | Honda Motor Co Ltd | 半導体装置の製造方法 |
JP2000216407A (ja) * | 1999-01-20 | 2000-08-04 | Fuji Electric Co Ltd | 炭化けい素縦形fetおよびその製造方法 |
JP2005235985A (ja) * | 2004-02-19 | 2005-09-02 | Toshiba Corp | 半導体装置 |
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WO2012013888A1 (fr) | 2012-02-02 |
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FR2963479A1 (fr) | 2012-02-03 |
EP2599125A1 (fr) | 2013-06-05 |
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