Patent ID: 6706646
Filing Date: 2004-03-16
Classification: C08G,C09D,C23C,H01L,Y10T

Abstract:
A method of forming a silicon oxide layer comprising:providing a semiconductor substrate having a stepped portion; coating the semiconductor substrate with a spin-on glass (SOG) composition containing perhydropolysilazane having the compound formula â€”(SiH2NH)nâ€” wherein n represents a positive integer, a weight average molecular weight within the range of from about 4,000 to about 8,000, a molecular weight dispersion within the range of about 3.0 to about 4.0; and curing the SOG layer to form a layer of silicon oxide having a planar surface, wherein the stepped portion is formed by: partially etching an upper portion of the semiconductor substrate to form a trench; and the silicon oxide layer is formed by: coating the SOG composition on the substrate to fill the trench and to form an SOG layer; and curing the SOG layer by: pre-baking the SOG layer at a temperature within the range of from about 100 to about 500Â° C. for a first period of time; and main-baking the SOG layer at a temperature within the range of about 900 to about 1000Â° C. for a second period of time.