Title: Method for making an article having replicated coating with durable dielectric overcoat

Abstract: In the method for making an article having a replicated coating with a durable dielectric overcoat. A master is formed having a surface to be replicated formed thereon. A parting compound such as silicon oil is placed on the surface while under a vacuum. An optical coating is formed in reverse order, with the protective coat first and the reflective coat last, on the coated surface while in the vacuum under a low temperature to cause initial curing of the protective coat without reevaporation of the silicon oil. Thereafter, the optical coating on the master is post-cured in air at an elevated temperature to cause final curing and hardening of the protective coat. After the post-curing has been completed, the replicated part, if desired, is transferred to the part to carry the same and is mounted thereon by a sealing plastic.

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Inventors: Burroughs, Viola F. (Los Angeles, CA, US)
Vahl, Hasso G. (Los Angeles, CA, US)
Wahl, Harro W. D. (Whittier, CA, US)

Application Number: 694651
Filing Date: 1976-06-10
Publication_date: 1977-12-06
Assignee: Hohbach; Harold C. (Atherton, CA)
Primary Class(es): 156/232 156/239, 156/241, 156/289, 156/330, 264/1.9, 264/2.5, 427/152, 427/162, 427/166, 427/167
Other Classes:
US Patent Ref:

2456899	Dec, 1948	Strong	427/167.
2628921	Feb, 1953	Weinrich	427/166.
2911682	Nov, 1959	Ewald	264/1.
3080270	Mar, 1963	Lorenz	156/239.

Other Refs:
Primary Examiner: Drummond, Douglas J.
Assistant Examiner: Bokan, Thomas
Attorney: Flehr, Hohbach, Test, Albritton & Herbert