Patent ID: 6361718
Filing Date: 2002-03-26
Classification: B23K,B29C,B29D,B29K,B29L,C03C,C09D,Y10T

Abstract:
A process for producing an article having an uneven surface comprising:forming a film of a sol material between a substrate of the article and a mold in such a manner that the film is in close contact with said substrate and said mold; and heating the film to form a gelled film, having a thickness of 1 &mgr;m to 1 mm and a surface configuration that is the inversion of the surface configuration of said mold, on a surface of said substrate of the article; said sol material comprising: component (A), a silane compound represented by the following formula (1): R2SiX2â€ƒâ€ƒ(1) â€ƒwhere R is an alkyl group and X is an alkoxyl group or a halogen atom; and component (B), a silane compound represented by the following formula (2): Râ€²SiXâ€²3â€ƒâ€ƒ(2) â€ƒwhere Râ€² is a substituted or unsubstituted aryl group and Xâ€² is an alkoxyl group or a halogen atom; wherein the molar ratio of component (A) to component (B) is 1:0.2 to 1:4; and wherein said article is an optical element or an information recording medium substrate, and said uneven surface serves as the optical element or functions as a pit or tracking guide in said information recording medium substrate.