Optical device

Abstract

An optical device ( 10 ) has a joining structure in which a first conductive film ( 110 ) and a second conductive film ( 130 ) are joined to each other. The first conductive film ( 110 ) that constitutes the joining structure is constituted by a transparent conductive material and the like. In addition, the second conductive film ( 130 ) that constitutes the joining structure is constituted by a metal material. A transition region, in which the transparent conductive material and the metal material are mixed, exists between the first conductive film ( 110 ) and the second conductive film ( 130 ). The transparent conductive material includes, for example, a conductive polymer.

1 . A method of forming an optical device comprising a substrate, a first conductive film, and a second conductive film comprising:
 forming the second conductive film on the substrate,   forming the first conductive film on the second conductive film; and   making a heat treatment to the first conductive film and the second conductive film.   
     
     
         2 . The method of forming an optical device according to  claim 1 , wherein the first conductive film and the second conductive film are formed by a coating solution. 
     
     
         3 . The method of forming an optical device according to  claim 1 , wherein the second conductive film is not sintered when the first conductive film is formed.