Patent ID: 8497391

Claim:
A method of film formation, comprising using an insulating film material to form an insulating film by a plasma CVD method, wherein the insulating film material is a compound represented by chemical formula (1) shown below; wherein n represents an integer of 3 to 6, R 1 represents one of C 2 H, C 2 H 3 , C 3 H 3 , C 3 H 5 , C 4 H 5 , C 4 H 7 , C 5 H 7 , and C 5 H 9 , and R 2 represents one of C 2 H, C 2 H 3 , C 3 H 3 , C 3 H 5 , C 3 H 7 , C 4 H 5 , C 4 H 7 , C 4 H 9 , C 5 H 7 , C 5 H 9 , and C 5 H 11 .