Patent ID: 7914973
Filing Date: 2011-03-29
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: providing a semiconductor substrate comprising a cell region and a peripheral region; forming an object layer on the substrate across the cell region and the peripheral region; forming a buffer layer on the object layer; forming a first photoresist pattern on the buffer layer in the cell region; etching the buffer layer using the first photoresist pattern as a mask to form a buffer pattern in the cell region; forming a spacer on a sidewall of the buffer pattern; forming a mask layer on the object layer across the cell region and the peripheral region; forming a second photoresist pattern on the mask layer on the object layer in the peripheral region of the substrate; etching the mask layer on the object layer to expose the spacer and, at the same time, etching the mask layer on the object layer using the second photoresist pattern as a mask to form a peripheral mask pattern formed on the peripheral region; and etching the object layer using the spacer and peripheral mask pattern as a mask; wherein the object layer comprises a gate electrode layer, a silicon substrate in a field region or a metal layer forming a metal wiring.