JP2007157829A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP2007157829A JP2007157829A JP2005347988A JP2005347988A JP2007157829A JP 2007157829 A JP2007157829 A JP 2007157829A JP 2005347988 A JP2005347988 A JP 2005347988A JP 2005347988 A JP2005347988 A JP 2005347988A JP 2007157829 A JP2007157829 A JP 2007157829A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 71
- 230000004888 barrier function Effects 0.000 claims abstract description 31
- 150000004767 nitrides Chemical class 0.000 claims abstract description 26
- 239000000758 substrate Substances 0.000 claims abstract description 21
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 15
- 239000010432 diamond Substances 0.000 claims abstract description 15
- 230000017525 heat dissipation Effects 0.000 claims description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 7
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 claims description 6
- CYKMNKXPYXUVPR-UHFFFAOYSA-N [C].[Ti] Chemical compound [C].[Ti] CYKMNKXPYXUVPR-UHFFFAOYSA-N 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims 11
- 239000002356 single layer Substances 0.000 claims 1
- 150000001722 carbon compounds Chemical class 0.000 abstract description 10
- 229940125810 compound 20 Drugs 0.000 abstract 1
- 238000009413 insulation Methods 0.000 abstract 1
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 229910002601 GaN Inorganic materials 0.000 description 5
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 5
- -1 DLC Inorganic materials 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- RNQKDQAVIXDKAG-UHFFFAOYSA-N aluminum gallium Chemical compound [Al].[Ga] RNQKDQAVIXDKAG-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000009828 non-uniform distribution Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000005533 two-dimensional electron gas Effects 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
- H01L29/66—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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/373—Cooling facilitated by selection of materials for the device or materials for thermal expansion adaptation, e.g. carbon
- H01L23/3732—Diamonds
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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
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66446—Unipolar field-effect transistors with an active layer made of a group 13/15 material, e.g. group 13/15 velocity modulation transistor [VMT], group 13/15 negative resistance FET [NERFET]
- H01L29/66462—Unipolar field-effect transistors with an active layer made of a group 13/15 material, e.g. group 13/15 velocity modulation transistor [VMT], group 13/15 negative resistance FET [NERFET] with a heterojunction interface channel or gate, e.g. HFET, HIGFET, SISFET, HJFET, HEMT
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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
- H01L29/12—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
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- H—ELECTRICITY
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- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
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- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- Chemical & Material Sciences (AREA)
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- Manufacturing & Machinery (AREA)
- Junction Field-Effect Transistors (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
Abstract
【解決手段】基板11上に形成されたGaNからなる動作層12の上に、AlxGa(1-x)N(0<x≦1)からなる障壁層13が積層されており、動作層12と障壁層13とからヘテロ接合界面が形成されている。ソース電極14およびドレイン電極15が互いに間隔をおいて形成され、ソース電極およびドレイン電極間にはゲート電極16が形成されている。表面には絶縁性と密着性の高いカーボン化合物20を施す。カーボン化合物膜20の上に、放熱膜として放熱性に優れた熱伝導率の高いダイヤモンド膜19を施す。これらの膜は前記動作層および前記障壁層および前記基板を貫通する溝21ごと表面を被覆している。
【選択図】図2
Description
さらに本発明は、前記カーボンの化合物がチタンカーボン(TiC)もしくはアルミニウムカーボン(AlC)であることが好ましい。なぜならば、TiCおよびAlCは特にダイヤモンドやDLCやカーボンとの密着性が高いため、放熱膜が半導体層により強固に密着するからである。
本発明の第1の実施形態に係る半導体装置について図1を参照しながら説明する。
本発明の第2の実施形態に係る半導体装置について図2を参照しながら説明する。
図2(a)に示すように、基板11上に形成されたGaNからなる動作層12の上に、AlxGa(1-x)N(0<x≦1)からなる障壁層13が積層されており、動作層12と障壁層13とからヘテロ接合界面が形成されている。ソース電極14およびドレイン電極15が互いに間隔をおいて形成され、ソース電極14およびドレイン電極15間にはゲート電極16が形成されている。表面には密着性の高いカーボン化合物からなる絶縁膜20(例えば、チタンカーボン(TiC)もしくはアルミニウムカーボン(AlC))を施す。絶縁膜20の上に、放熱膜として放熱性に優れた熱伝導率の高いダイヤモンド膜19を施す。これらの膜は前記動作層12および前記障壁層13および前記基板11を貫通する溝21ごと被覆している。また、絶縁膜20の厚みは半導体内部の熱がダイヤモンド膜19に伝わることを妨げない程度の厚みがあればよい。
本発明の第3の実施形態に係る半導体装置について図3を参照しながら説明する。
12 動作層
13 障壁層
14 (第1の)ソース電極
15 ドレイン電極
16 ゲート電極
17 SiN表面保護膜
18 ボンディングパッド
19 ダイヤモンド(放熱)膜
20 カーボン化合物(絶縁)膜
21 溝
22 導電性Si基板
23 第2のソース電極
24 配線部材
25 DLC(放熱)層
Claims (7)
- 基板上に形成された第1のIII族窒化物半導体層、その上に形成された障壁層として作用する1層もしくは多層からなる第2のIII族窒化物半導体層、その上にソース電極、およびドレイン電極、および該両電極間を流れる電流を制御するゲート電極を有し、表面保護膜としてボンディングパッド以外の表面全体を熱伝導率の高い放熱膜で被覆していることを特徴とする半導体装置。
- 導電層として作用する基板上に形成された第1のIII族窒化物半導体層、その上に形成された障壁層として作用する1層もしくは多層からなる第2のIII族窒化物半導体層、その上にソース電極、およびドレイン電極、および該両電極間を流れる電流を制御するゲート電極を有し、前記第1のIII族窒化物半導体層および前記基板を貫通する溝を備え、表面保護膜としてボンディングパッド以外の表面全体を熱伝導率の高い放熱膜で前記溝の中ごと被覆していることを特徴とする半導体装置。
- 前記半導体基板上にソース電極と該ソース電極の両側に1対のドレイン電極とが形成され、ソース電極と1対のドレイン電極との間に1対のゲート電極が形成されている、あるいは前記電極類の配置が複数回周期的に配列している場合において、表面保護膜として熱伝導率の高い放熱膜でボンディングパッド以外の表面全体を被覆していること特徴とする請求項1又は2に記載の半導体装置。
- 前記放熱膜がダイヤモンドもしくはダイヤモンドライクカーボン(DLC)もしくはカーボンもしくはこれらの多層膜からなることを特徴とする請求項1から3のいずれか1項に記載の半導体装置。
- 前記放熱膜の下に放熱膜とは異なる物質からなる絶縁層を敷くことを特徴とする請求項1から3のいずれか1項に記載の半導体装置。
- 前記放熱膜の下の絶縁層がカーボンとの化合物であることを特徴とする請求項5に記載の半導体装置。
- 前記カーボンとの化合物がチタンカーボン(TiC)もしくはアルミニウムカーボン(AlC)であることを特徴とする請求項6に記載の半導体装置。
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JP2005347988A JP2007157829A (ja) | 2005-12-01 | 2005-12-01 | 半導体装置 |
US11/593,016 US7759700B2 (en) | 2005-12-01 | 2006-11-06 | Semiconductor device |
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JP2005347988A JP2007157829A (ja) | 2005-12-01 | 2005-12-01 | 半導体装置 |
Publications (2)
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JP2007157829A true JP2007157829A (ja) | 2007-06-21 |
JP2007157829A5 JP2007157829A5 (ja) | 2008-08-14 |
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JP2005347988A Pending JP2007157829A (ja) | 2005-12-01 | 2005-12-01 | 半導体装置 |
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JP (1) | JP2007157829A (ja) |
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