Patent ID: 7135371
Filing Date: 2006-11-14
Classification: H01L

Abstract:
1. A method for fabricating a semiconductor device comprising: forming a gate oxide and a gate electrode on a semiconductor substrate; performing a first ion implantation process for the formation of a (lightly doped drain) LDD region in the substrate; forming spacers on the sidewalls of the gate electrode; performing a second ion implantation process for the formation of a junction region in the substrate using the spacers as a mask; forming a trench for device isolation by removing selectively the top portion of the substrate between the spacers; forming an oxide layer on the whole substrate except on the spacers; forming a diffusion barrier on the resulting substrate; depositing a gap filling insulation layer over the diffusion barrier; planarizing the gap filling insulating layer; and removing selectively some part of the gap filling insulation layer to form contact holes.