Patent ID: 6200843
Filing Date: 2001-03-13
Classification: H01L,Y10S

Abstract:
A method for forming a semiconductor device, the method comprising the steps of:providing a substrate;forming a first electrically insulating layer on the substrate;forming a second electrically insulating layer on the first electrically insulating layer;forming openings through the second electrically insulating layer down to the level of the first electrically insulating layer;forming spacers on opposing sidewalls of the openings;removing spacers on one of the opposing side walls of the openings, thereby exposing portions of the first electrically insulating layer;removing exposed portions of the first electrically insulating layer in the openings, thereby exposing portions of the substrate;removing spacers on another of the opposing sidewalls of the openings, thereby exposing portions of the first electrically insulating layer; andforming a third electrically insulating layer in the openings over the exposed portions of the first electrically insulating layer and the exposed portions of the substrate.