Patent ID: 9548216
Date: 2017-01-17
CPC Classifications: H01L

Claim:
1. A method of adjusting channel widths of semiconductive devices, comprising: providing a substrate divided into a first region and a second region, wherein the substrate comprises a plurality of fins disposed within the first region and the second region and an isolating region disposed between adjacent fins; performing a first implantation process on the fins within the first region; performing a second implantation process on the fins within the second region, wherein the first implantation process and the second implantation process are different from each other in at least one of the conditions comprising dopant species, dopant dosage or implantation energy; simultaneously removing part of the fins within the first region and the second region to form a plurality of first recesses within the first region and a plurality of second recesses within the second region, wherein a depth of each of the first recesses is greater than a depth of each of the second recesses; and simultaneously forming a first epitaxial layer to fill up each first recess and forming a second epitaxial layer to fill up each second recess.