Patent ID: 7270849
Filing Date: 2007-09-18
Classification: C08G,C09D,C23C,H01L,Y10T

Abstract:
1. An organosiloxane copolymer film having plural kinds of organosiloxane derived composition units, wherein the plural kinds of organosiloxane derived composition units comprises at least a first organosiloxane with a cyclosiloxane backbone derived unit and a second organosiloxane with a straight-chain siloxane backbone derived unit; wherein the organosiloxane copolymer film forms a bridge structure by bonding a plurality of second organosiloxanes to the first organosiloxane; and wherein the copolymer film has a film configuration in which a content ratio of the first orgonosiloxane backbone derived unit and the second organosiloxane with a straight-chain siloxane backbone derived unit is changing in the film thickness direction.