JP4796665B2 - 半導体装置およびその製造方法 - Google Patents
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
- H01L29/66053—Multistep manufacturing processes of devices having a semiconductor body comprising crystalline silicon carbide
- H01L29/66068—Multistep manufacturing processes of devices having a semiconductor body comprising crystalline silicon carbide 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
-
- 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 at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/0445—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising crystalline silicon carbide
- H01L21/045—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising crystalline silicon carbide passivating silicon carbide surfaces
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/7801—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/7802—Vertical DMOS transistors, i.e. VDMOS transistors
- H01L29/7811—Vertical DMOS transistors, i.e. VDMOS transistors with an edge termination structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. 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
- H01L29/16—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 System
- H01L29/1608—Silicon carbide
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Description
図1は、本発明の第1の実施形態に係る半導体装置を模式的に示す断面図である。
以下、図9(a)から(f)を参照しながら、第1の実施形態の半導体装置を製造する方法を説明する。図9(a)から(f)は、第1の実施形態に係る半導体装置の製造工程を示す断面図である。
2 炭化珪素バッファ層
3、103 炭化珪素ドリフトエピ層
4、104 ウェル領域
5 ソース領域
6 ボディコンタクト領域
7 チャネルエピ層
8 ゲート絶縁膜
8a 絶縁膜
9 ゲート電極
10、110 層間絶縁膜
10a、10b 開口
11 ソース・オーミック電極
11a ゲート・オーミック電極
12 ドレイン・オーミック電極
13、113 パッド電極
14 第1の保護絶縁層(応力緩和膜)
15、115 第2の保護絶縁層(パッシベーション膜)
16、116 裏面電極
17、117 半導体素子(DMISFET)領域
18、118 終端ガードリング領域
19、119 チップ・コーティング材(JCR)
20、120 半導体リング領域
30、130 高電界領域
Claims (10)
- 炭化珪素層の一部に配置される半導体素子領域と、前記炭化珪素層の主面に垂直な方向から見て前記炭化珪素層のうち前記半導体素子領域を囲む領域に配置されるガードリング領域とを有する半導体装置であって、
前記炭化珪素層における半導体素子領域および前記ガードリング領域の前記主面上に形成された比誘電率が20以上である層間絶縁膜と、
前記ガードリング領域において前記層間絶縁膜の上に形成された第1の保護絶縁層と、
前記第1の保護絶縁層の上に形成された第2の保護絶縁層と
を含み、
前記第1の保護絶縁層は、前記第2の保護絶縁層を構成する材料の線膨張係数と前記層間絶縁膜を構成する材料の線膨張係数との間の線膨張係数を有し、
前記第2の保護絶縁層はシリコン窒化物から構成され、かつ前記第2の保護絶縁層の厚さは1.5μm以上である、半導体装置。 - 前記第2の保護絶縁層を構成する材料の線膨張係数と炭化珪素の線膨張係数との差よりも、前記第1の保護絶縁層を構成する材料の線膨張係数と炭化珪素の線膨張係数との差の方が小さい、請求項1に記載の半導体装置。
- 前記第1の保護絶縁層および前記第2の保護絶縁層は前記ガードリング領域に形成され、前記半導体素子領域の少なくとも一部には形成されていない請求項1または2に記載の半導体装置。
- 前記層間絶縁膜は、ジルコニウム酸化物、ハフニウム酸化物、およびチタン酸化物から構成される群より選択された材料から形成されている請求項1から3のいずれかに記載の半導体装置。
- 前記第1の保護絶縁層は、アルミニウム酸化物及びアルミニウム窒化物から構成される群より選択された材料から形成されている請求項1から4のいずれかに記載の半導体装置。
- 前記層間絶縁膜の厚さと前記第1の保護絶縁層の厚さとの合計は1.5μm以上であり、かつ前記第1の保護絶縁層の厚さよりも前記層間絶縁膜の厚さの方が大きい請求項1から5のいずれかに記載の半導体装置。
- 前記第2の保護絶縁層を構成するシリコン窒化物は、線膨脹係数の値が2.5×10-6以上3.0×10-6/℃以下の範囲内にある請求項1に記載の半導体装置。
- 前記半導体素子領域にはダイオードが設けられている請求項1から7のいずれかに記載の半導体装置。
- 前記半導体素子領域には電界効果トランジスタが設けられている請求項1から7のいずれかに記載の半導体装置。
- 炭化珪素層の一部に配置される半導体素子領域と、前記炭化珪素層の主面に垂直な方向から見て前記炭化珪素層のうち前記半導体素子領域を囲む領域に配置されるガードリング領域とを有する半導体装置の製造方法であって、
前記半導体素子領域および前記ガードリング領域における前記炭化珪素層の上に、比誘電率が20以上である層間絶縁膜を形成する工程と、
前記ガードリング領域における前記層間絶縁膜の上に第1の保護絶縁層を形成する工程と、
前記第1の保護絶縁層の上に第2の保護絶縁層を形成する工程とを含み、
前記第1の保護絶縁層は、前記第2の保護絶縁層を構成する材料の線膨張係数と前記層間絶縁膜を構成する材料の線膨張係数との間の線膨張係数を有し、
前記第2の保護絶縁層はシリコン窒化物から構成され、かつ前記第2の保護絶縁層の厚さは1.5μm以上である、半導体装置の製造方法。
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JP2011508148A JP4796665B2 (ja) | 2009-09-03 | 2010-08-26 | 半導体装置およびその製造方法 |
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JP2011508148A JP4796665B2 (ja) | 2009-09-03 | 2010-08-26 | 半導体装置およびその製造方法 |
PCT/JP2010/005275 WO2011027523A1 (ja) | 2009-09-03 | 2010-08-26 | 半導体装置およびその製造方法 |
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JP4796665B2 true JP4796665B2 (ja) | 2011-10-19 |
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US (1) | US8471267B2 (ja) |
JP (1) | JP4796665B2 (ja) |
CN (1) | CN102217070B (ja) |
WO (1) | WO2011027523A1 (ja) |
Cited By (2)
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WO2011027523A1 (ja) | 2011-03-10 |
US8471267B2 (en) | 2013-06-25 |
US20110220917A1 (en) | 2011-09-15 |
CN102217070B (zh) | 2013-09-25 |
JPWO2011027523A1 (ja) | 2013-01-31 |
CN102217070A (zh) | 2011-10-12 |
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