Coated copper reflector

Details Coated copper reflector Coated copper reflector

1978-02-21

1980-02-19

Stern, Ronald J.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

350164, 427160, G02B 508, G02B 528, C03C 1708

Patent

active

041892054

ABSTRACT:
A reflector or mirror for the visible and rear infrared spectrum is formed by multicoating copper with one-fifth wavelength and three-quarter wavelength films. These films are alternating low and high index films, and MgF.sub.2 and TiO.sub.2 are presently preferred. A thin bonding layer of TiO.sub.2 is used to secure adhesion of the MgF.sub.2 to the copper. This coating enhances the reflectance in the visible range without appreciable degradation of reflectance in the near infrared, so that the resultant curve of reflectance-versus-frequency is substantially flat. The resulting coating is hard and tough and may be cleaned without injury and withstands high humidity.

REFERENCES:
patent: 2519722 (1950-08-01), Turner
patent: 2854349 (1958-09-01), Dreyfus et al.
patent: 3758185 (1973-09-01), Gelber
patent: 4065626 (1977-12-01), Franz
patent: 4093349 (1978-06-01), Mills
patent: 4142006 (1979-02-01), Choyke et al.
Reale, Manufacturing Optics International, vol. 22, No. 1, Jul. 1969, pp. 9, 11-13.
Hass et al, Jour. of Vacuum Science and Technology, vol. 4, No. 2, Mar./Apr. 1967, pp. 71-79.

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