Patent ID: 10910220

Abstract:
A method for flatly covering a semiconductor substrate using a silicon-containing composition. A method for producing a polysiloxane-coated substrate, including a first step for forming a first polysiloxane coating film by applying a first polysiloxane composition for coating to a stepped substrate and firing the composition thereon and a second step for forming a second film by applying a second polysiloxane composition for coating to the first film and firing the composition thereon. The second film has an Iso-dense bias of 50 nm or less; the first polysiloxane contains a hydrolysis-condensation product of a hydrolyzable silane starting material containing a first hydrolyzable silane having four hydrolyzable groups in each molecule at a ratio of 0-100% by mole in all the silanes; and the second polysiloxane contains silanol groups at a ratio of 30% by mole or less relative to Si atoms, while having a weight average molecular weight of 1,000-50,000.