发明名称 |
Semiconductor device with integrated breakdown protection |
摘要 |
A device includes a semiconductor substrate having a first conductivity type, a device isolating region in the semiconductor substrate, defining an active area, and having a second conductivity type, a body region in the active area and having the first conductivity type, and a drain region in the active area and spaced from the body region to define a conduction path of the device, the drain region having the second conductivity type. The device isolating region and the body region are spaced from one another to establish a first breakdown voltage lower than a second breakdown voltage in the conduction path. |
申请公布号 |
US9236472(B2) |
申请公布日期 |
2016.01.12 |
申请号 |
US201213448994 |
申请日期 |
2012.04.17 |
申请人 |
Freescale Semiconductor, Inc. |
发明人 |
Chen Weize;Bode Hubert M.;De Souza Richard J.;Parris Patrice M. |
分类号 |
H01L29/78;H01L29/66;H01L29/06;H01L29/10 |
主分类号 |
H01L29/78 |
代理机构 |
Lempia Summerfield Katz LLC |
代理人 |
Lempia Summerfield Katz LLC |
主权项 |
1. A device comprising:
a semiconductor substrate having a first conductivity type; a device isolating region in the semiconductor substrate, defining an active area, and having a second conductivity type; a body region in the active area and having the first conductivity type; a source region in the active area and having the second conductivity type; and a drain region in the active area and spaced from the body region to define a conduction path of the device, the drain region having the second conductivity type; wherein at least one of the body region and the device isolating region is a composite region that comprises a plurality of contiguous, constituent regions, each constituent region being disposed along a respective part of a junction between the body region and the device isolating region to establish a non-uniformity, the non-uniformity defining a non-uniform spacing along the junction between the device isolating region and the body region to establish a first breakdown voltage lower than a second breakdown voltage in the conduction path, and wherein the body region comprises a first well on which the source region is disposed and a second well adjacent the first well and spaced from the device isolating region to establish the first breakdown voltage. |
地址 |
Austin TX US |