Patent ID: 7572694
Filing Date: 2009-08-11
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising: forming a gate electrode over a semiconductor substrate having a device isolation film formed thereon; forming a lower spacer film on sidewalls of the gate electrode; forming a high concentration junction region on the semiconductor substrate laterally between the device isolation film and the gate electrode; forming a first insulation film over the semiconductor substrate including the gate electrode, the lower spacer film and the high concentration junction region; forming a trench in the first insulation film; forming an upper spacer film over and directly contacting the uppermost surface of the first insulation film and the trench; selectively etching the upper spacer film to form upper spacers on sidewalls of the trench; and then etching a via in the first insulation film using the upper spacers as etch masks to thereby expose the high concentration junction region.