JP6057990B2 - 金フリー・オーミックコンタクト - Google Patents
金フリー・オーミックコンタクト Download PDFInfo
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- JP6057990B2 JP6057990B2 JP2014513545A JP2014513545A JP6057990B2 JP 6057990 B2 JP6057990 B2 JP 6057990B2 JP 2014513545 A JP2014513545 A JP 2014513545A JP 2014513545 A JP2014513545 A JP 2014513545A JP 6057990 B2 JP6057990 B2 JP 6057990B2
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- 239000004065 semiconductor Substances 0.000 claims description 38
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 32
- 239000010703 silicon Substances 0.000 claims description 32
- 229910052710 silicon Inorganic materials 0.000 claims description 29
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 239000003870 refractory metal Substances 0.000 claims description 12
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052697 platinum Inorganic materials 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 150000004767 nitrides Chemical class 0.000 claims 6
- 239000010410 layer Substances 0.000 description 62
- 239000010931 gold Substances 0.000 description 6
- 235000012431 wafers Nutrition 0.000 description 5
- 229910002704 AlGaN Inorganic materials 0.000 description 4
- 229910000676 Si alloy Inorganic materials 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001260 Pt alloy Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005566 electron beam evaporation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
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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
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/45—Ohmic electrodes
-
- 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
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/45—Ohmic electrodes
- H01L29/452—Ohmic electrodes on AIII-BV compounds
-
- 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
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/20—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only AIIIBV compounds
-
- 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
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/778—Field effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT ; with two-dimensional charge-carrier layer formed at a heterojunction interface
-
- 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
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/20—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only AIIIBV compounds
- H01L29/2003—Nitride compounds
-
- 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
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/778—Field effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT ; with two-dimensional charge-carrier layer formed at a heterojunction interface
- H01L29/7786—Field effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT ; with two-dimensional charge-carrier layer formed at a heterojunction interface with direct single heterostructure, i.e. with wide bandgap layer formed on top of active layer, e.g. direct single heterostructure MIS-like HEMT
- H01L29/7787—Field effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT ; with two-dimensional charge-carrier layer formed at a heterojunction interface with direct single heterostructure, i.e. with wide bandgap layer formed on top of active layer, e.g. direct single heterostructure MIS-like HEMT with wide bandgap charge-carrier supplying layer, e.g. direct single heterostructure MODFET
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Electrodes Of Semiconductors (AREA)
- Junction Field-Effect Transistors (AREA)
Description
本開示による半導体構造体は、半導体と、半導体とオーム性接触する金フリー電気伝導構造体と、半導体の層によって分離された一対の電気伝導層、または、シリコン層と合金化された電気伝導層の対の一方又は双方とを有する。
ある実施形態では、半導体はGaNを含む。
ある実施形態では、第1の金属層は、耐火性金属である。
ある実施形態では、シリコンの第2層は、第2の金属層と接触している。
ある実施形態では、第3の金属層は、シリコンの第2層と接触し又は合金化される。
それは、Si製造での使用のために重要であり、Siウエハ上にGaNのヘテロ集積を可能にしする、金フリーオーミック接触メタライゼーションは、Siファウンドリで製造される。
開示の一つ以上の実施形態の詳細は、添付の図面および下記の説明に記載される。他の特徴、目的および開示の効果は、説明および図面から、そして、特許請求の範囲から明らかである。
例えば、図1を参照すると、トランジスタデバイス10は、AlGaN/GaN高電子移動度トランジスター(HEMT)構造が示される。ここで、トランジスタデバイス10は、示されるように、単結晶基板12、基板12上のGaNバッファー層14、および、GaN層14上の半導体層16を有するウェハ上に形成される。トランジスタデバイス10は、ゲート電極17、並びに、ソースおよびドレイン電極18、20をそれぞれ備える。ソースおよびドレイン18、20金フリー電気接点電極と半導体層16とオーミック接触共に、ここ層16は、III-V AlGaN層である。ソースおよびドレイン電極18,20金フリー電気的接点はともに、半導体層16とオーミック接触であり、ここで層16は、III-V AlGaN層である。ソースおよびドレイン電極18、20は、構造上同一であり;例示の一つとしてここでは、ソースコンタクト18を図2により詳細に示す。
本開示による半導体構造が半導体と、半導体とオーム性接触する金フリー電気伝導構造とを包含し、シリコン層と合金化される電気伝導層の対の一方または両方と、または、シリコン層によって分離される電気伝導層の対とからなる、ことを特徴とすることが認められる。半導体構造体は、以下の特徴の一つ以上を含む:電気伝導構造体は、
半導体と接触して配置した耐熱性金属層であって、シリコンの層によって分離された電気伝導層の対のうちの一方が耐熱性金属層またはシリコンおよび耐熱性金属層の合金であることを特徴とする耐熱性金属層と、電気伝導層の対のうちの第2の一方の上に配置され、シリコンの第2の層の上に第3の電気伝導層を包含するシリコンの第2の層と、を包含し、第1の金属層がチタンであり、第3の金属層が白金であり、半導体がIII-V材料であることを特徴とする。
Claims (3)
- 窒化物半導体と、前記窒化物半導体とオーム性接触する金フリー電気伝導構造体とを有する半導体構造体であって、
前記窒化物半導体と直接的に接触する耐熱性金属層と、
前記耐熱性金属層の上に配置される第1のシリコン層と、
前記第1のシリコン層と接触する電気伝導層と、
前記電気伝導層の上の第2のシリコン層と、
前記第2のシリコン層の上の白金の層と、
を有し、
前記耐熱性金属層がチタンであり、
前記電気伝導層がアルミニウムであることを特徴とする半導体構造体。 - 窒化物半導体と、前記窒化物半導体とオーム性接触する金フリー電気伝導構造体とを有する半導体構造体であって、
前記窒化物半導体と直接的に接触する耐熱性金属層と、
前記耐熱性金属層の上に配置される第1のシリコン層と、
前記第1のシリコン層と接触する電気伝導層と、
前記電気伝導層の上の第2のシリコン層と、
前記第2のシリコン層の上の白金の層と、
を有し、
前記耐熱性金属層がチタンであり、
前記チタンが、200Åのレンジの厚さを有し、
前記電気伝導層がアルミニウムであり、
前記第1のシリコン層が、100Å乃至200Åのレンジの厚さを有する
ことを特徴とする半導体構造体。 - 前記第2のシリコン層が、100Å乃至200Åのレンジの厚さを有することを特徴とする請求項2に記載の半導体構造体。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/152,481 | 2011-06-03 | ||
US13/152,481 US8466555B2 (en) | 2011-06-03 | 2011-06-03 | Gold-free ohmic contacts |
PCT/US2012/038497 WO2012166385A1 (en) | 2011-06-03 | 2012-05-18 | Gold-free ohmic contacts |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2014515562A JP2014515562A (ja) | 2014-06-30 |
JP6057990B2 true JP6057990B2 (ja) | 2017-01-11 |
Family
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Application Number | Title | Priority Date | Filing Date |
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JP2014513545A Active JP6057990B2 (ja) | 2011-06-03 | 2012-05-18 | 金フリー・オーミックコンタクト |
Country Status (5)
Country | Link |
---|---|
US (1) | US8466555B2 (ja) |
JP (1) | JP6057990B2 (ja) |
KR (1) | KR101510094B1 (ja) |
CN (1) | CN103636001B (ja) |
WO (1) | WO2012166385A1 (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9911817B2 (en) | 2015-07-17 | 2018-03-06 | Cambridge Electronics, Inc. | Field-plate structures for semiconductor devices |
US9917171B2 (en) | 2016-07-21 | 2018-03-13 | International Business Machines Corporation | Low-resistive, CMOS-compatible, Au-free ohmic contact to N—InP |
US9846277B1 (en) | 2016-07-28 | 2017-12-19 | Hewlett Packard Enterprise Development Lp | Semiconductor devices |
US10224285B2 (en) * | 2017-02-21 | 2019-03-05 | Raytheon Company | Nitride structure having gold-free contact and methods for forming such structures |
US10096550B2 (en) | 2017-02-21 | 2018-10-09 | Raytheon Company | Nitride structure having gold-free contact and methods for forming such structures |
US11581448B2 (en) | 2021-04-01 | 2023-02-14 | Raytheon Company | Photoconductive semiconductor switch laterally fabricated alongside GaN on Si field effect transistors |
US11710708B2 (en) | 2021-08-19 | 2023-07-25 | Raytheon Company | On-chip EMF isolation of an integrated circuit coupled with photoconductive semiconductor switch under an on-chip faraday cage |
CN113889534A (zh) * | 2021-09-27 | 2022-01-04 | 南方科技大学 | 无金欧姆接触电极、半导体器件和射频器件及其制法 |
WO2023082204A1 (en) * | 2021-11-12 | 2023-05-19 | Innoscience (Suzhou) Technology Co., Ltd. | Semiconductor device and method for manufacturing the same |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
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US5389564A (en) | 1992-06-22 | 1995-02-14 | Motorola, Inc. | Method of forming a GaAs FET having etched ohmic contacts |
JP3584481B2 (ja) * | 1993-09-21 | 2004-11-04 | ソニー株式会社 | オーミック電極の形成方法およびオーミック電極形成用積層体 |
JPH1022494A (ja) * | 1996-07-03 | 1998-01-23 | Sony Corp | オーミック電極およびその形成方法 |
US6858522B1 (en) | 2000-09-28 | 2005-02-22 | Skyworks Solutions, Inc. | Electrical contact for compound semiconductor device and method for forming same |
US6548333B2 (en) * | 2000-12-01 | 2003-04-15 | Cree, Inc. | Aluminum gallium nitride/gallium nitride high electron mobility transistors having a gate contact on a gallium nitride based cap segment |
JP3866149B2 (ja) * | 2002-05-08 | 2007-01-10 | 富士通株式会社 | 半導体装置の製造方法 |
JP4594113B2 (ja) * | 2005-01-19 | 2010-12-08 | 新電元工業株式会社 | 半導体装置の製造方法 |
WO2006129553A1 (ja) * | 2005-06-03 | 2006-12-07 | The Furukawa Electric Co., Ltd. | Iii-v族窒化物系化合物半導体装置、及び電極形成方法 |
JP5462161B2 (ja) * | 2007-07-20 | 2014-04-02 | アイメック | Iii−v族mesfetでのダマシンコンタクト製造方法 |
CN101369599B (zh) * | 2008-07-11 | 2011-02-16 | 北京大学 | 氮化镓基器件的欧姆接触及其制备方法 |
US8563372B2 (en) * | 2010-02-11 | 2013-10-22 | Cree, Inc. | Methods of forming contact structures including alternating metal and silicon layers and related devices |
-
2011
- 2011-06-03 US US13/152,481 patent/US8466555B2/en active Active
-
2012
- 2012-05-18 WO PCT/US2012/038497 patent/WO2012166385A1/en active Application Filing
- 2012-05-18 CN CN201280020021.9A patent/CN103636001B/zh active Active
- 2012-05-18 KR KR20137027907A patent/KR101510094B1/ko active IP Right Grant
- 2012-05-18 JP JP2014513545A patent/JP6057990B2/ja active Active
Also Published As
Publication number | Publication date |
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US20120305931A1 (en) | 2012-12-06 |
KR101510094B1 (ko) | 2015-04-08 |
CN103636001A (zh) | 2014-03-12 |
US8466555B2 (en) | 2013-06-18 |
JP2014515562A (ja) | 2014-06-30 |
CN103636001B (zh) | 2016-08-17 |
KR20130136553A (ko) | 2013-12-12 |
WO2012166385A1 (en) | 2012-12-06 |
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