Three layer anti-reflection film

Details Three layer anti-reflection film Three layer anti-reflection film

1973-09-21

1976-01-27

Kendall, Ralph S.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427166, 428432, 428539, 428213, G02B 528

Patent

active

039349616

ABSTRACT:
Three-layer anti-reflection coatings consisting of first, second and third layers, respectively positioned from a glass base plate. The optical film thickness of the first layer and the second layer is one-half of a designed wavelength while that of the third layer is one-fourth of the same. And the relationship among the refractive index of each layer is second layer (n.sub.2) glass (n.sub.g) first layer (n.sub.1) third layer (n.sub.3). The first layer is made of a mixture of Al.sub.2 O.sub.3 and ZrO.sub.2.

REFERENCES:
patent: 3176575 (1965-04-01), Socha
patent: 3185020 (1965-05-01), Thelen
patent: 3271179 (1966-09-01), Smith
patent: 3463574 (1969-08-01), Bastien et al.
patent: 3695910 (1972-10-01), Louderback et al.
patent: 3781090 (1973-12-01), Sumita

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