Patent ID: 7670899
Filing Date: 2010-03-02
Classification: H01G,H01L

Abstract:
1. A method for forming a MIM capacitor, comprising: depositing a lower metal layer on a semiconductor substrate; patterning the lower metal layer; depositing a photoresist on an entire surface of the semiconductor substrate to cover the patterned lower metal layer; thermally treating the semiconductor substrate to reflow the photoresist; and etching the reflowed photoresist and the lower metal layer; forming a dielectric layer and an upper metal layer on an entire surface of the substrate to cover the lower metal layer; and patterning the dielectric and upper metal layers on the lower metal layer, wherein each of the dielectric layer and the upper metal layer has a curved profile following a topology of the lower metal layer and wherein the lower metal layer has a convex half cylindrical profile and is located between the semiconductor substrate and the dielectric layer.