Patent ID: 6086945
Filing Date: 2000-07-11
Classification: C23C,H01L,Y02E,Y02P

Abstract:
A method of forming a polycrystalline silicon thin layer, which comprises the steps of:a) forming a silicon thin film having a thickness of not more than 30 .mu.m on a surface of a heat resistant substrate which is not decomposed with heat by making use of polycrystalline silicon fine particles as a raw material; andb) heating said silicon thin film thereby to recrystallize said silicon thin film and hence to enlarge an average grain diameter of said polycrystalline silicon fine particles;wherein a particle diameter (r) of said raw silicon fine particles is not more than 3 times of said thickness (d) of a silicon film to be deposited on said heat resistant substrate; andwherein said silicon thin film is formed by depositing said polycrystalline silicon fine particles directly on the surface of said substrate, and satisfies a relationship represented by the following formula (1):W.sub.A /(V.sub.S .multidot.d.sub.S).gtoreq.0.95 (1)wherein W.sub.A is the weight of said polycrystalline silicon fine particles which is actually deposited on the surface of said substrate; V.sub.S is a volume of said silicon thin film which is deposited on the surface of the substrate; and d.sub.S is a density of silicon (Si).