Patent ID: 9608077
Date: 2017-03-28
CPC Classifications: H01L

Claim:
1. A method for manufacturing a semiconductor structure, comprising: preparing a substrate which includes a first doping region and a second doping region; forming a dielectric layer over the substrate; forming a first opening in the dielectric layer to exposes the first doping region; forming a silicon filler in the first opening; forming a mask layer to protect the silicon filler and the first opening; forming a second opening in the dielectric layer to exposes the second doping region, wherein the second opening is formed after the forming of the mask layer; forming a sidewall spacer over the sidewall of the second opening; recessing the silicon filler to form a silicon region, wherein the silicon region fills a lower portion of the first opening: forming a first metal-silicon region over the silicon region; and forming a second metal-silicon region over the second doping region.