Patent ID: 9117900
Filing Date: 2015-08-25
Classification: H01L

Abstract:
1. A radio frequency (RF) laterally diffused metal oxide semiconductor (LDMOS) device comprising: a substrate having a first conductivity type; a channel doped region having the first conductivity type and a drift region having a second conductivity type, each in an upper portion of the substrate, the channel doped region having a first end in lateral contact with a first end of the drift region; a first well having the first conductivity type in the substrate, the first well having a first portion located under and in direct contact with a bottom of the first end of the channel doped region and a second portion located under and in direct contact with a bottom of the first end of the drift region; and a second well having the first conductivity type in the substrate, the second well being located under the drift region and having a top portion in direct contact with a bottom of a second end of the drift region.