Patent ID: 8563371
Filing Date: 2013-10-22
Classification: H01L

Abstract:
1. A method of forming a semiconductor device, comprising: forming a first insulating layer on a semiconductor substrate; forming a first polycrystalline silicon layer on the first insulating layer; forming a second insulating layer on the first polycrystalline silicon layer; forming a second polycrystalline silicon layer on the second insulating layer; forming a mask pattern on the second polycrystalline silicon layer; patterning the second polycrystalline silicon layer using the mask pattern as an etch mask to form a second polycrystalline silicon pattern exposing a portion of the second insulating layer, wherein a first amorphous region is formed on a sidewall of the second polycrystalline silicon pattern; crystallizing the first amorphous region using a first recrystallization process; removing the exposed portion of the second insulating layer to form a second insulating pattern exposing a portion of the first polycrystalline silicon layer; removing the exposed portion of the first polycrystalline silicon layer to form a first polycrystalline silicon pattern exposing a portion of the first insulating layer; and removing the exposed portion of the first insulating layer to form a first insulating pattern exposing a portion of the semiconductor substrate, wherein the forming of the first insulating pattern or the second insulating pattern comprises dry-etching the first insulating layer or the second insulating layer using a gas including carbon and fluorine.