Patent Number: 6,168,825

Title: Process for producing thin transparent gold coatings

Abstract: A process for forming a thin blue colored gold deposit, which transmits substantially more visible light than infrared energy. A suitable substrate, usually transparent, is selected and aggressively cleaned to such an extent that water will sheet rather than bead on the surface. The surface is sensitized with a solid phase sensitizing agent such as tin chloride. The surface is either rubbed with a slurry of the solid phase sensitizing agent or it is or it is dipped into an agitated slurry of the agent. Two very dilute reagent solutions are prepared; a reducing solution, and a gold ion containing solution. The reagent solutions are co-mingled and simultaneously projected onto the cleaned surface. The reagent solutions react to form a blue colored gold deposit on the surface. This blue colored deposit passes more visible than infrared energy by a factor of approximately two.

Inventors: O'Brien; Dudley (Los Angeles, CA), Vogler; Jerry (Los Angeles, CA), Landry; James M. (West Hills, CA), Jakubowski; Gerald S. (Los Angeles, CA)


International Classification: C03C 17/10 (20060101); C03C 17/06 (20060101); C03C 17/36 (20060101); C03C 17/38 (20060101); C23C 18/31 (20060101); C23C 18/20 (20060101); C23C 18/28 (20060101); C23C 18/44 (20060101); G02B 5/20 (20060101); B05D 005/06 ()

Expiration Date: 01/02/2018