Patent ID: 9412668
Filing Date: 2016-08-09
CPC Classification: H01L

Claim Text:
1. A method of forming a semiconductor structure comprising: implanting a first type of impurity atoms into a substrate to simultaneously form a first core well, a first I/O source extension well, a first I/O drain extension well, and a first I/O well; implanting a second type of impurity atoms into the substrate to simultaneously form a second core well, a second I/O well, a second I/O source extension well, and a second I/O drain extension well, the second I/O well touching the first I/O source extension well and the first I/O drain extension well, the second I/O source extension well and the second I/O drain extension well touching the first I/O well; implanting the first type of impurity atoms into the second core well to simultaneously form a first core source extension region and a first core drain extension region; implanting the second type of impurity atoms into the first core well to simultaneously form a second core source extension region and a second core drain extension region; and simultaneously implanting the first type of impurity atoms into: