Patent ID: 9263337
Filing Date: 2016-02-16
CPC Classification: H01L

Claim Text:
1. A method for manufacturing a semiconductor device, the method comprising: forming a first opening in a substrate with a first bottom, wherein the forming the first opening is performed with a photoresist mask located over a gate electrode and wherein the substrate comprises first dopants with a first conductivity; implanting second dopants into the first opening, wherein the second dopants have a second conductivity opposite from the first conductivity; removing the photoresist mask after the implanting the second dopants; introducing an etchant to the substrate along sidewalls of the first opening after the implanting the second dopants into the first opening and after the removing the photoresist mask to form a recess in the substrate, wherein the introducing the etchant uses a carrier gas to generate a liquid stream that is substantially free from carbon dioxide, wherein the substrate is a semiconductor material, and wherein the etchant is in a liquid phase, wherein the recess has a second bottom that is at least 10 nm further from a major surface of the substrate than the first bottom; and removing the etchant from the substrate.