发明授权
- 专利标题: METHOD OF MANUFACTURING SEMICONDUCTOR DEVICES
- 专利标题(中): 法半导体器件
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申请号: EP07828876.8申请日: 2007-09-21
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公开(公告)号: EP2064731B1公开(公告)日: 2010-04-07
- 发明人: KAWAHASHI, Akira , SUGIMOTO, Masahiro , SEKI, Akinori , MAEDA, Masakatsu , TAKAHASHI, Yasuo
- 申请人: Toyota Jidosha Kabushiki Kaisha , Osaka University
- 申请人地址: 1, Toyota-cho Toyota-shi, Aichi 471-8571 JP
- 专利权人: Toyota Jidosha Kabushiki Kaisha,Osaka University
- 当前专利权人: Toyota Jidosha Kabushiki Kaisha,Osaka University
- 当前专利权人地址: 1, Toyota-cho Toyota-shi, Aichi 471-8571 JP
- 代理机构: Winter, Brandl, Fürniss, Hübner Röss, Kaiser, Polte Partnerschaft Patent- und Rechtsanwaltskanzlei
- 优先权: JP2006256705 20060922; JP2006256706 20060922
- 国际公布: WO2008035822 20080327
- 主分类号: H01L21/28
- IPC分类号: H01L21/28 ; H01L29/45 ; H01L29/78 ; H01L29/24
摘要:
A method is set forth of forming an ohmic electrode having good characteristics on a SiC semiconductor layer. In the method, a Ti-layer and an Al-layer are formed on a surface of the SiC substrate. The SiC substrate having the Ti-layer and the Al-layer is maintained at a temperature that is higher than or equal to a first temperature and lower than a second temperature until all Ti in the Ti-layer has reacted with Al. The first temperature is the minimum temperature of a temperature zone at which the Ti reacts with the Al to form Al3Ti, and the second temperature is the minimum temperature of a temperature zone at which the Al3Ti reacts with SiC to form Ti3SiC2. As a result of this maintaining of temperature step, an Al3Ti-layer is formed on the surface of the SiC substrate. The method also comprises further heating the SiC substrate having the Al3Ti-layer to a temperature that is higher than the second temperature. As a result of this step of further heating the SiC substrate reacts with Al3Ti of the Al3Ti-layer to form a Ti3SiC2-layer on the surface of the SiC substrate.
公开/授权文献
- EP2064731A1 SEMICONDUCTOR DEVICES AND MANUFACTURING METHOD THEREOF 公开/授权日:2009-06-03
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