Patent ID: 7173180

Claim:
A method of forming a silicon film on a substrate, comprising forming a coating film of a silane composition on the substrate and treating it with heat and/or light in a non-oxidizing atmosphere, wherein the silane composition comprises: (A) a polysilane compound represented by the formula Si n R m , wherein n is an integer of 3 or more, m is an integer of n to (2n+2) and an m number of R's are each independently a hydrogen atom, alkyl group, phenyl group or halogen atom, with the proviso that when all the m number of R's are hydrogen atoms and m=2n, n is an integer of 7 or more; and (B) at least one silane compound selected from the group consisting of cyclopentasilane, cyclohexasilane and silylcyclopentasilane; and (C) silicon particles.