Patent ID: 8722511

Claim:
A method of forming a semiconductor device, the method comprising: forming a first dielectric material layer above a semiconductor region and an isolation region, said semiconductor region and said isolation region having formed thereon one or more conductive lines, said isolation region comprising recesses, wherein said first dielectric material layer is formed prior to forming drain and source regions in said semiconductor region; performing a first removal process so as to remove said first dielectric material layer at least from above a portion of said semiconductor region and to preserve a part of said first dielectric material layer in said recesses of said isolation region; forming said drain and source regions in said semiconductor region; after forming said drain and source regions, forming a second dielectric material layer above said semiconductor region and said isolation region; performing a second removal process so as to remove said second dielectric material layer at least from above a second portion of said semiconductor region and to preserve a part of said second dielectric material layer in said recesses of said isolation region; and forming an interlayer dielectric material system above said semiconductor region and said isolation region after performing said second removal process.