JP2004532423A5 - - Google Patents

Claims (17)

A light transmissive substrate;
A reflective layer comprising a highly reflective metal layer covering and bonded to the light transmissive substrate; and a protective layer comprising a parylene polymer film bonded to the reflective layer;
An optical structure comprising: a parylene polymer film comprising a layer of parylene C in contact with the reflective layer.   The optical structure of claim 1, wherein the parylene polymer film further comprises a layer of Parylene D in contact with the Parylene C layer.   The optical structure of claim 2, wherein the parylene polymer film further comprises an intermediate layer of parylene C and parylene D between the parylene D layer and the parylene C layer.   3. The method of claim 2, further comprising an adhesion promoting layer for increasing the bond strength between the light transmissive substrate and the reflective layer, wherein the adhesion promoting layer comprises a thickness of about 10 to 1,000 mm. The optical structure described.   The optical structure according to claim 4, wherein the adhesion promoting layer is in the form of a metal or metalloid oxide.   The optical structure of claim 5, wherein the substrate comprises a fiber optic waveguide.   The optical structure according to claim 2, wherein the light-transmitting substrate is made of glass or a polymer material, and the reflective metal layer is made of silver.   The optical structure of claim 2, wherein the parylene C layer and the parylene D layer are annealed. A barrier coating composition for protecting a substrate, comprising:
A first layer of a first parylene polymer for coating a surface portion of a substrate;
A second transition layer of a mixture of a first parylene polymer and a second parylene polymer on the first layer; and a third layer of only the second parylene polymer on the second layer;
A composition comprising   The composition according to claim 9, wherein the transition layer is a gradient layer.   10. A composition according to claim 9, wherein the first and second parylene polymers are selected from parylene C, D and N.   The composition of claim 9, wherein the first and second parylene polymers are annealed.   The composition of claim 9 further comprising an adhesion promoting layer between the first layer and the substrate.   The composition according to claim 13, wherein the transition layer is a gradient layer.   15. The composition of claim 14, wherein the first parylene polymer is parylene C and the second parylene polymer is parylene D.   16. A composition according to claim 15, wherein the adhesion promoting layer is in the form of a metal or metalloid oxide. The composition according to claim 16, wherein the metal is aluminum.