Patent ID: 8101493
Filing Date: 2012-01-24
Classification: H01L

Abstract:
1. A method comprising: forming a photoresist pattern over an upper metal layer used for forming a capacitor of a semiconductor device; performing an etching process with respect to the photoresist pattern such that corners of the photoresist pattern are rounded; etching the upper metal layer by using the photoresist pattern having rounded corners as a mask, thereby forming an upper electrode; forming a lower metal layer over a semiconductor substrate before forming the upper metal layer; and forming the upper metal layer after forming an insulating layer over the lower metal layer, wherein, when forming the upper electrode, an insulating layer pattern is formed by etching the insulating layer formed below the upper electrode, wherein the insulating layer pattern has a first thickness at a region corresponding to the upper electrode and a second thickness at remaining regions, in which the second thickness is smaller than the first thickness.