JP2018125520A - 炭化ケイ素上への金属接触層の形成及び金属接触構造を有する半導体デバイス - Google Patents
炭化ケイ素上への金属接触層の形成及び金属接触構造を有する半導体デバイス Download PDFInfo
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- JP2018125520A JP2018125520A JP2017241265A JP2017241265A JP2018125520A JP 2018125520 A JP2018125520 A JP 2018125520A JP 2017241265 A JP2017241265 A JP 2017241265A JP 2017241265 A JP2017241265 A JP 2017241265A JP 2018125520 A JP2018125520 A JP 2018125520A
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- metal
- layer
- silicide
- particles
- silicon carbide
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Classifications
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- H—ELECTRICITY
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- 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
- H01L21/048—Making electrodes
- H01L21/0485—Ohmic electrodes
-
- H—ELECTRICITY
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- 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
- H01L29/0684—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 the shape, relative sizes or dispositions of the semiconductor regions or junctions between the regions
- H01L29/0688—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 the shape, relative sizes or dispositions of the semiconductor regions or junctions between the regions characterised by the particular shape of a junction between semiconductor regions
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
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- H01L29/0692—Surface layout
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- 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
- H01L29/08—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 with semiconductor regions connected to an electrode carrying current to be rectified, amplified or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
- H01L29/0804—Emitter regions of bipolar transistors
- H01L29/0813—Non-interconnected multi-emitter structures
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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
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- H01L29/08—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 with semiconductor regions connected to an electrode carrying current to be rectified, amplified or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
- H01L29/083—Anode or cathode regions of thyristors or gated bipolar-mode devices
- H01L29/0834—Anode regions of thyristors or gated bipolar-mode devices, e.g. supplementary regions surrounding anode regions
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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
- H01L29/08—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 with semiconductor regions connected to an electrode carrying current to be rectified, amplified or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
- H01L29/0843—Source or drain regions of field-effect devices
- H01L29/0847—Source or drain regions of field-effect devices of field-effect transistors with insulated gate
- H01L29/0852—Source or drain regions of field-effect devices of field-effect transistors with insulated gate of DMOS transistors
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- H01L29/0878—Impurity concentration or distribution
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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Abstract
【解決手段】 半導体デバイスは、炭化ケイ素をベースとする半導体ボディと、金属接触構造とを含む。シリサイド核と、シリサイド核の表面上の炭素被覆とを含む界面粒子は、半導体ボディと金属接触構造との間に直接形成される。界面粒子の隣接するものの間において、金属接触構造は、半導体ボディに直接隣接する。
【選択図】 図9
Description
101 第1の表面
102 第2の表面
103 側面
110 ソースゾーン
113 エミッタゾーン
120 第2の主構造
121 アノードウェル
122 ボディ領域
123 ベース領域
124 ゲート領域
125 遮蔽領域
130 第1の主構造
131 ドリフト部
133 チャネル領域
135 分離領域
136 遮蔽領域
138 バッファ層
139 接触層
150 トレンチゲート構造
153 ケイ素酸化物層
155 ゲート電極
159 ゲート誘電体
180 領域
190 メサ部
191 メサ側壁
192 メサ側壁
210 中間層誘電体
300 界面粒子
302 金属接触構造
305 シリサイド核
309 炭素被覆
310 第1の負荷電極
311 金属層
315 接触構造
320 第2の負荷電極
330 制御電極
340 金属接触層
350 開始層
356 区域
360 遮蔽電極
380 前駆体構造
381 マトリックス材料
385 金属粒子
390 溶液
391 溶媒
395 溶質
400 キャリア箔
450 分離構造
500 半導体デバイス
590 炭化ケイ素基材
700 炭化ケイ素ボディ
701 処理表面
705 開口
706 連結部分
710 接触領域
900 ウエハー複合体
Claims (22)
- 炭化ケイ素ボディの処理表面上に、シリサイド形成金属を含有する材料から開始層を形成すること;及び
前記開始層及び前記炭化ケイ素ボディの一部から、シリサイド核と炭素被覆とを含む孤立した界面粒子を形成することであって、前記孤立した界面粒子間の前記処理表面の連結部分は露出される、形成すること
を含む、半導体デバイスを製造する方法。 - 金属接触層を前記処理表面の前記連結部分上に直接形成することであって、前記界面粒子は、前記金属接触層と前記炭化ケイ素ボディとの間に埋め込まれる、形成することを更に含む、請求項1に記載の方法。
- 前記開始層は、前記処理表面の未被覆の部分を露出する少なくとも1つの開口を含む、請求項1又は2に記載の方法。
- 前記開始層は、前記処理表面を完全に被覆し、前記開始層の材料、構造、及び厚さは、前記界面粒子の前記形成中に前記連結部分を露出させるように選択される、請求項1〜3のいずれか一項に記載の方法。
- 前記シリサイド形成金属は、ニッケル、タングステン、バナジウム、チタン、コバルト、及び鉄の1つである、請求項1〜3のいずれか一項に記載の方法。
- 前記開始層は、金属、金属酸化物、及び金属−有機材料の少なくとも1つを含む、請求項1〜5のいずれか一項に記載の方法。
- 前記開始層は、前記シリサイド形成金属を含有する溶質を含む溶液の熱処理によって形成される、請求項1〜6のいずれか一項に記載の方法。
- 前記溶質は、中心金属原子と、少なくとも1つの有機配位子とを有する金属錯体を含有する金属化合物を含む、請求項7に記載の方法。
- 前記溶液は、ニッケルオキシメートを含有し、及び前記開始層は、ニッケル酸化物層である、請求項7又は8に記載の方法。
- 前記開始層は、金属粒子を含む、請求項1〜5のいずれか一項に記載の方法。
- 前記開始層は、前記金属粒子を含有するマトリックス材料を除去することによって形成される、請求項10に記載の方法。
- 前記マトリックス材料は、液体であって、その中に前記金属粒子が分散されている液体であり、前記熱処理は、前記マトリックス材料を蒸発又は気化させる、請求項11に記載の方法。
- 前記開始層の厚さは、5nm〜500nmの範囲である、請求項1〜12のいずれか一項に記載の方法。
- 前記開始層は、アモルファス及びナノ結晶の少なくとも1つであるか、又はナノ粒子を含む、請求項1〜13のいずれか一項に記載の方法。
- 前記界面粒子を形成することは、レーザーアニールを含む、請求項1〜14のいずれか一項に記載の方法。
- 炭化ケイ素をベースとする半導体ボディ;
金属接触構造;及び
シリサイド核と、前記シリサイド核の表面上の炭素被覆とを含む界面粒子
を含む半導体デバイスであって、前記界面粒子は、前記半導体ボディと前記金属接触構造との間に直接存在し、前記界面粒子の隣接するものの間において、前記金属接触構造は、前記半導体ボディに直接隣接している、半導体デバイス。 - シリサイドは、ニッケルシリサイド、タングステンシリサイド、バナジウムシリサイド、チタンシリサイド、コバルトシリサイド、及び鉄シリサイドの少なくとも1つである、請求項16に記載の半導体デバイス。
- 前記界面粒子の平均粒径は、最大500nmである、請求項16又は17に記載の半導体デバイス。
- 前記炭素被覆は、グラファイトを含む、請求項16〜18のいずれか一項に記載の半導体デバイス。
- ドリフト部を含む第1の主構造であって、前記半導体ボディの第1の表面と前記第1の主構造との間の第2の主構造と共に第1のpn接合を形成する第1の主構造を更に含む、請求項16〜19のいずれか一項に記載の半導体デバイス。
- 前記界面粒子は、前記第1の表面と対向する前記半導体ボディの第2の表面に沿って形成される、請求項20に記載の半導体デバイス。
- 前記界面粒子は、前記第1の表面に沿って形成される、請求項20又は21に記載の半導体デバイス。
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JP2021064672A (ja) * | 2019-10-11 | 2021-04-22 | 株式会社デンソー | 炭化珪素半導体装置およびその製造方法 |
JP7505278B2 (ja) | 2020-06-11 | 2024-06-25 | 富士電機株式会社 | 炭化珪素半導体装置 |
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US11282927B2 (en) * | 2020-06-02 | 2022-03-22 | Cree, Inc. | Contact structures for semiconductor devices |
JP2022125387A (ja) * | 2021-02-17 | 2022-08-29 | 富士電機株式会社 | 炭化珪素半導体装置および炭化珪素半導体装置の製造方法 |
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