Patent ID: 6509648
Filing Date: 2003-01-21
Classification: H01L

Abstract:
A semiconductor device comprising:an underlying layer; a first layer wiring formed on said underlying layer; an interlayer dielectric film formed on said underlying layer to cover said first layer wiring; and a second layer wiring formed on said interlayer dielectric film, said interlayer dielectric film comprising: a first dielectric film formed on said underlying layer to cover said first layer wiring; and a second dielectric film formed on said first dielectric film, said second dielectric film being made of a different material from said first dielectric film, said second dielectric film having a thickness reduced by a predetermined thickness from a surface thereof after being formed once, wherein said interlayer dielectric film has a surface made flat by being cleaned with a cleaning liquid whose etching rate to said first dielectric film and etching rate to said second dielectric film are substantially the same.