Patent ID: 6346475
Filing Date: 2002-02-12
Classification: H01L

Abstract:
A method of manufacturing a semiconductor integrated circuit having, on a substrate, conductors for electrical connection of a plurality of semiconductor devices, said substrate having a first region and a second region different from said first region, said method comprising steps of:forming a plurality of semiconductor devices on a substrate; forming an etching stopper film on said plurality of semiconductor devices; forming a first conducting portion for connecting said plurality of semiconductor devices with each other; forming, on said etching stopper film, an interlayer dielectric film portion and a second conducting portion for connection of said first conducting portion in said first region, said interlayer dielectric film portion containing silicon oxide; forming an opening in said second region through said interlayer dielectric film portion; and etching said interlayer dielectric film portion having said opening formed therein in an etching solution containing at least hydrogen fluoride acid therein to remove said interlayer dielectric film portion.