Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1980-05-19
1982-12-07
Powell, William A.
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
156634, 156639, 156640, 156651, 1566611, 219203, 428201, 428596, 430313, 430316, 430318, 430321, 430329, C23F 102, B44C 122, C03C 1500, C03C 2506
Patent
active
043625959
ABSTRACT:
A method of fabricating very fine metal screens for use in a transparent or translucent panel through which visible light is transmittable but which acts as a barrier against transmissions of pulsed electromagnetic radiation which may be harmful to humans or disruptive to electronic gear. The screens are fabricated by printing a pattern photographically upon a first surface of a metal foil covered on both sides by a positive, photo sensitive etchant mask and removing exposed areas of the mask with a developer. The masked foil is then chemically blanked by application of an etchant to the first side only of the foil. The specimen is rotated 90 degrees on a frequent basis to prevent selective etching, especially in areas adjacent the periphery of the screen. The protective mask and the mask on the second side of the foil are then exposed to light and removed from the screen leaving a screen presenting minimum optical distortion and visual blocking therethrough and possessing unimpeded electrical conductivity in all directions.
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Garrison David L.
Gullette Robert
Powell William A.
The Boeing Company
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