发明公开
EP2013911A2 SEMICONDUCTOR DEVICE WITH SURGE CURRENT PROTECTION AND METHOD OF MAKING THE SAME
审中-公开
峰值电源保护和工艺制造半导体COMPONENT
- 专利标题: SEMICONDUCTOR DEVICE WITH SURGE CURRENT PROTECTION AND METHOD OF MAKING THE SAME
- 专利标题(中): 峰值电源保护和工艺制造半导体COMPONENT
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申请号: EP07794508.7申请日: 2007-05-01
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公开(公告)号: EP2013911A2公开(公告)日: 2009-01-14
- 发明人: SANKIN, Igor , MERRETT, Joseph Neil
- 申请人: Semisouth Laboratories, Inc.
- 申请人地址: 201 Research Boulevard Starkville, MS 39759 US
- 专利权人: Semisouth Laboratories, Inc.
- 当前专利权人: Semisouth Laboratories, Inc.
- 当前专利权人地址: 201 Research Boulevard Starkville, MS 39759 US
- 代理机构: Murray, Elisabeth Anne
- 优先权: US415279 20060502
- 国际公布: WO2007130505 20071115
- 主分类号: H01L29/872
- IPC分类号: H01L29/872 ; H01L29/868
摘要:
A wide bandgap semiconductor device with surge current protection and a method of making the device are described. The device comprises a low doped n-type region formed by plasma etching through the first epitaxial layer grown on a heavily doped n-type substrate and a plurality of heavily doped p-type regions formed by plasma etching through the second epitaxial layer grown on the first epitaxial layer. Ohmic contacts are formed on p-type regions and on the backside of the n-type substrate. Schottky contacts are formed on the top surface of the n-type region. At normal operating conditions, the current in the device flows through the Schottky contacts. The device, however, is capable of withstanding extremely high current densities due to conductivity modulation caused by minority carrier injection from p-type regions.
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