Patent ID: 8394728
Filing Date: 2013-03-12
Classification: C23C,H01L

Abstract:
1. A film deposition method comprising the steps of: coating a substrate with a solution containing a polysilane compound to form a first coating film and then carrying out a first thermal treatment in an inert atmosphere to convert the first coating film into a silicon film; forming a second coating film containing a polysilane compound on the silicon film and then carrying out a second thermal treatment on the silicon film and the second coating film in an inert atmosphere or a reducing atmosphere, the second thermal treatment being effective to convert the second coating film into a silicon oxide precursor film; and carrying out a third thermal treatment on the silicon film and the silicon oxide precursor film in an oxidizing atmosphere, the third thermal treatment being effective to (a) convert the silicon oxide precursor film into a silicon oxide film, and simultaneously (b) densify the silicon film while not oxidizing the silicon film.