发明授权
- 专利标题： Semiconductor device having an ESD protective circuitry
- 专利标题（中）： 具有ESD保护电路的半导体器件
-
申请号： US591025申请日： 1996-01-25
-
公开(公告)号： US5706156A公开(公告)日： 1998-01-06
- 发明人: Kaoru Narita
- 申请人： Kaoru Narita
- 申请人地址： JPX Tokyo
- 专利权人： NEC Corporation
- 当前专利权人： NEC Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX7-009375 19950125
- 主分类号： H01L21/822
- IPC分类号： H01L21/822 ; H01L23/00 ; H01L27/02 ; H01L27/04 ; H03K19/003 ; H02H9/00
摘要：
A semiconductor device has a protective circuitry including a common discharge line, a first protective device connected between one of input/output terminals and the discharge line, and a second protective device connected between one of Vcc and ground terminals and the discharge line. The second protective device has an on-resistance as much as 1/2 of the on-resistance of the first protective device. Each of the power terminals and ground terminals generally has a large capacitance to accumulate a large amount of electric charge during a CDM test after charging of the semiconductor device as a whole. The low on-resistance prevents the inner circuit and input/output buffers of the semiconductor device from being applied with a higher potential during subsequent grounding of the semiconductor device in the CDM test.
公开/授权文献
- USD333251S Knife handle 公开/授权日：1993-02-16
信息查询
IPC分类:
