JP2000516767A - 電圧吸収エッジを有するpn接合を含むSiC半導体装置 - Google Patents
電圧吸収エッジを有するpn接合を含むSiC半導体装置Info
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- JP2000516767A JP2000516767A JP10505911A JP50591198A JP2000516767A JP 2000516767 A JP2000516767 A JP 2000516767A JP 10505911 A JP10505911 A JP 10505911A JP 50591198 A JP50591198 A JP 50591198A JP 2000516767 A JP2000516767 A JP 2000516767A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 66
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 230000003247 decreasing effect Effects 0.000 claims abstract description 6
- 230000001747 exhibiting effect Effects 0.000 claims abstract 2
- 239000004020 conductor Substances 0.000 claims description 62
- 238000000034 method Methods 0.000 claims description 54
- 230000007423 decrease Effects 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 11
- 239000007943 implant Substances 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 4
- 229910052796 boron Inorganic materials 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 4
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052733 gallium Inorganic materials 0.000 claims description 3
- 235000012431 wafers Nutrition 0.000 claims 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 2
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 claims 2
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- 229910010271 silicon carbide Inorganic materials 0.000 abstract description 43
- 239000010410 layer Substances 0.000 description 45
- 230000005684 electric field Effects 0.000 description 29
- 238000002513 implantation Methods 0.000 description 15
- 238000005468 ion implantation Methods 0.000 description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- 238000009826 distribution Methods 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 6
- 230000000873 masking effect Effects 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 150000002500 ions Chemical group 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/0603—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions
- H01L29/0607—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration
- H01L29/0611—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices
- H01L29/0615—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices by the doping profile or the shape or the arrangement of the PN junction, or with supplementary regions, e.g. junction termination extension [JTE]
- H01L29/0619—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices by the doping profile or the shape or the arrangement of the PN junction, or with supplementary regions, e.g. junction termination extension [JTE] with a supplementary region doped oppositely to or in rectifying contact with the semiconductor containing or contacting region, e.g. guard rings with PN or Schottky junction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/0445—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising crystalline silicon carbide
- H01L21/0455—Making n or p doped regions or layers, e.g. using diffusion
- H01L21/046—Making n or p doped regions or layers, e.g. using diffusion using ion implantation
- H01L21/0465—Making n or p doped regions or layers, e.g. using diffusion using ion implantation using masks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/0603—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions
- H01L29/0607—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration
- H01L29/0611—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices
- H01L29/0615—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for increasing or controlling the breakdown voltage of reverse biased devices by the doping profile or the shape or the arrangement of the PN junction, or with supplementary regions, e.g. junction termination extension [JTE]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/16—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only elements of Group IV of the Periodic Table
- H01L29/1608—Silicon carbide
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- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
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- Y10S438/00—Semiconductor device manufacturing: process
- Y10S438/931—Silicon carbide semiconductor
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- Chemical & Material Sciences (AREA)
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- Electrodes Of Semiconductors (AREA)
- Thyristors (AREA)
- Bipolar Transistors (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1. pn接合を含み、このpn接合の第1導体形式(n)の層および第2導 体形式(p)の層の両方が炭化珪素(SiC)のドープした層を構成し、上記層 の少なくとも一つがエッジ終端(JTE)を備える半導体素子に於いて、このエ ッジ終端(JTE)がこの終端の外部境界の方へ階段状にまたは連続的に減少す る総電荷を包含することを特徴とする半導体素子。 2. pn接合を含み、このpn接合の第1導体形式(n)の層および第2導 体形式(p)の層が炭化珪素(SiC)のドープした層を構成する、平面構造の 半導体素子に於いて、高濃度にドープした上記層のエッジがエッジ終端(JTE )を備え、そこでこのエッジ終端が、この終端の外部境界の方へ階段状にまたは 連続的に、減少する総電荷および/または減少する上記高濃度にドープした層と 同じ導体形式の有効シート電荷密度を現すことを特徴とする半導体素子。 3. 請求項2による半導体素子に於いて、上記半導体が、第1導体形式のウ ェーハ(1,2)を含み、その表面に低濃度にドープした層(2)およびこのウ ェーハの限られた面積に注入した、第2導体形式の高濃度にドープした層(3) を有し、上記低濃度にドープした層(2)および上記高濃度にドープした層(3 )が上記pn接合を形成し、上記pn接合が第2導体形式の領域(4a〜4d, 11)を有する上記終端延長部(JTE)によって横方向に囲まれ、上記領域の 総電荷または上記領域の面積は、この接合終端延長部(JTE)の電荷量が上記 終端(JTE)のエッジ(5)の方へ減少するような値または面積であることを 特徴とする半導体素子。 4. 請求項3による半導体素子に於いて、上記半導体が一つ以上のJTE領 域(4a〜4d)を含み、これらの領域が互いに接触することを特徴とする半導 体素子。 5. 請求項3による半導体素子に於いて、上記半導体が上記JTE領域に上 記第2導体形式の別々の領域(11)を含み、そこで上記領域の面積がこのJT Eのエッジ(5)の方へ次第に小さくなっていることを特徴とする半導体素子。 6. 請求項3による半導体素子に於いて、上記半導体が上記JTE領域に上 記第2導体形式の別々の領域(11)を含み、そこで上記領域間の距離がこのJ TEのエッジ(5)の方へ次第に長くなっていることを特徴とする半導体素子。 7. 請求項3による半導体素子に於いて、上記半導体が上記JTE領域に上 記第2導体形式の別々の領域(11)を含み、そこで上記領域の総電荷および/ または有効シート電荷密度がこのJTEのエッジ(5)の方へ減少することを特 徴とする半導体素子。 8. 請求項3による半導体素子に於いて、上記半導体が一つ以上のJTE領 域(4a〜4d)を含み、上記領域の有効シート電荷密度関係が − 一領域の実施例に対し、Q1=(40〜70) − 二領域の実施例に対し、Q1:Q2=100:(40〜60) − 三領域の実施例に対し、Q1:Q2:Q3=100:(50〜85):(2 5〜60) − 四領域の実施例に対し、Q1:Q2:Q3:Q4=100:(60〜85) :(40〜60):(15〜40) であり、但し、値100がこの固有シート電荷密度Q0に相当することを特徴と する半導体素子。 9. 平面構造のpn接合を含み、このpn接合を形成する低濃度にドープし た第1導体形式の層(2)および高濃度にドープした第2導体形式の層(3)の 両方が炭化珪素(SiC)のドープした層を構成し、この高濃度にドープした層 のエッジがエッジ終端(JTE)を備えるべき半導体素子の製造方法に於いて、 珪素炭素ウェーハ(1,2)上に、ウェーハ表面にある第1導体形式の低濃度に ドープした層(2)を含み、ウェーハ表面から没入する第2導体形式のアノード (3)層を有し、上記低濃度にドープした層(2)および上記アノード(3)が 平面構造のpn接合を形成している半導体素子を、製造する方法が、注入すべき でない予定の第1領域(4a)に隣接するウェーハの区域をマスキングし、ウェ ーハの露出した区域に注入剤を注入し、それによって第2導体形式の第1接合終 端延長部(JTE)領域(4a)を作ることによって、このアノード(3)を囲 むJTEを作る工程を含むことを特徴とする方法。 10. 請求項9による方法に於いて、上記第1領域(4a)に隣接する区域 のマスクを除去し、そこで露出した区域に上記注入剤を注入して第2JTE領域 (4b)を作ることを特徴とする方法。 11. 請求項9による方法に於いて、上記第1領域(4a)に隣接する連続 区域のマスクを工程毎に除去し、そこで各マスク除去工程後に露出した区域に注 入して、総電荷量が減少する連続JTE領域(4a〜4d)を作ることを特徴と する方法。 12. 請求項9、請求項10または請求項11による方法に於いて、p導体 形式のJTE領域(4a〜4d)を作るために使用する注入剤がアルミニウム、 硼素またはガリウムであり、一方、n導体形式のJTE領域(4a〜4d)を作 るために使用する注入剤が窒素であることを特徴とする方法。 13. 平面構造のpn接合を含み、このpn接合を形成する低濃度にドープ した第1導体形式の層(2)および高濃度にドープした第2導体形式の層(3) の両方が炭化珪素(SiC)のドープした層を構成し、この高濃度にドープした 層のエッジがエッジ終端(JTE)を備えるべき半導体素子の製造方法に於いて 、珪素炭素ウェーハ(1,2)上に、ウェーハ表面にある第1導体形式の低濃度 にドープした層(2)を含み、表面から没入する第2導体形式のアノード(3) 層を有し、上記低濃度にドープした層(2)および上記アノード(3)が平面構 造のpn接合を形成する半導体を製造する方法が、このアノード(3)の外側の ウェーハの区域を孔(12)パターンのあるマスク(13)でマスキングし、こ のマスク(13)の孔(12)が露出したウェーハの区域に注入剤を注入し、そ れによってこのウェーハの表面に第2導体形式のスポット(11)を形成して、 電荷量がアノード(3)から半径方向に減少する接合終端延長部(JTE)を作 ることによって、このアノード(3)を囲むJTEを作る工程を含むことを特徴 とする方法。 14. 請求項13による方法に於いて、上記注入を、孔(12)の面積がア ノード(3)から半径方向に外方に減少する設計のマスク(13)で実行するこ とを特徴とする方法。 15. 請求項13による方法に於いて、上記注入を孔(12)のある設計の マスク(13)で実行し、ここで上記孔(12)の間の距離がアノード(3)か ら半径方向に外方に増加することを特徴とする方法。 16. 請求項13による方法に於いて、上記注入を孔(12)のある設計の マスク(13)で実行し、ここでこの注入の量をこの終端のエッジ(5)の方に 減少することを特徴とする方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/683,059 | 1996-07-16 | ||
US08/683,059 US6002159A (en) | 1996-07-16 | 1996-07-16 | SiC semiconductor device comprising a pn junction with a voltage absorbing edge |
PCT/SE1997/001157 WO1998002924A2 (en) | 1996-07-16 | 1997-06-27 | SiC SEMICONDUCTOR DEVICE COMPRISING A pn JUNCTION WITH A VOLTAGE ABSORBING EDGE |
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JP2008263877A Division JP5527958B2 (ja) | 1996-07-16 | 2008-10-10 | 電圧吸収エッジを有するpn接合を含むSiC半導体装置 |
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JP2000516767A true JP2000516767A (ja) | 2000-12-12 |
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JP10505911A Pending JP2000516767A (ja) | 1996-07-16 | 1997-06-27 | 電圧吸収エッジを有するpn接合を含むSiC半導体装置 |
JP2008263877A Expired - Lifetime JP5527958B2 (ja) | 1996-07-16 | 2008-10-10 | 電圧吸収エッジを有するpn接合を含むSiC半導体装置 |
JP2013000103A Pending JP2013062545A (ja) | 1996-07-16 | 2013-01-04 | 電圧吸収エッジを有するpn接合を含むSiC半導体コンポーネント |
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JP2008263877A Expired - Lifetime JP5527958B2 (ja) | 1996-07-16 | 2008-10-10 | 電圧吸収エッジを有するpn接合を含むSiC半導体装置 |
JP2013000103A Pending JP2013062545A (ja) | 1996-07-16 | 2013-01-04 | 電圧吸収エッジを有するpn接合を含むSiC半導体コンポーネント |
Country Status (5)
Country | Link |
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US (2) | US6002159A (ja) |
EP (1) | EP0912999B1 (ja) |
JP (3) | JP2000516767A (ja) |
DE (1) | DE69739522D1 (ja) |
WO (1) | WO1998002924A2 (ja) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5527958B2 (ja) | 2014-06-25 |
JP2013062545A (ja) | 2013-04-04 |
US6002159A (en) | 1999-12-14 |
EP0912999A2 (en) | 1999-05-06 |
JP2009044177A (ja) | 2009-02-26 |
DE69739522D1 (de) | 2009-09-17 |
WO1998002924A2 (en) | 1998-01-22 |
US6040237A (en) | 2000-03-21 |
EP0912999B1 (en) | 2009-08-05 |
WO1998002924A3 (en) | 1998-03-05 |
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