Patent ID: 6558581
Filing Date: 2003-05-06
Classification: C03C,C09D,H01B,H01J,Y10S,Y10T

Abstract:
A process for preparing a transparent electro-conductive layer forming coating fluid used in the production of a transparent electro-conductive structure having a transparent substrate and formed successively thereon a transparent electro-conductive layer and a transparent coat layer; the process comprising;a noble-metal-coated fine silver particle making step of adding to a colloidal dispersion of fine silver particles i) a reducing agent and at least one of an alkali metal aurate solution and an alkali metal platinate solution or ii) a reducing agent and a solution of mixture of an alkali metal aurate and an alkali metal platinate, to coat gold or platinum alone or a composite of gold and platinum on the surfaces of the fine silver particles to obtain a colloidal dispersion of noble-metal-coated fine silver particles; a desalting and concentrating step of subjecting the colloidal dispersion of noble-metal-coated fine silver particles to desalting treatment to lower its electrolyte concentration and to concentrating treatment to concentrate the colloidal dispersion, to obtain a concentrated dispersion of noble-metal-coated fine silver particles; and a solvent mixing step of adding to the concentrated dispersion of noble-metal-coated fine silver particles a solvent alone or a solvent containing at least one of conductive fine oxide particles and an inorganic binder, to obtain the transparent electro-conductive layer forming coating fluid.