Electric heating – Metal heating – By arc
Patent
1989-08-29
1990-06-26
Albritton, C. L.
Electric heating
Metal heating
By arc
29600, 21912185, 2191218, 21912169, 343756, 343840, 343909, B23K 2600
Patent
active
049374257
ABSTRACT:
A method of fabricating a polarizing dish antenna reflector (10) wherein a light source (22) is employed to pyrolyze an organometallic compound (14) disposed on the antenna surface to form grid elements (24) directly thereon. The surface of the parabolic dish antenna reflector (10) is coated with an organometallic compound (14) that comprises a metallic component such as gold, silver, copper chrome, or other suitable metal. The coated surface may be conditioned by depositing a surface film of polyimide, or the like. The coated surface is then pyrolyzed by using a high intensity focussed light source (22), such as a laser or discharge lamp to form metal grid lines (24) on the surface. The light source (22) is scanned across the surface to create parallel scan lines, or the light source may be fixed and the reflector surface can be moved relative to the light source (22) using a computer controlled XY table (16), or the like. The focussed light pyrolyzes the organometallic compound (14) and volatilizes the organic portion thereof, leaving metal traces disposed on the reflector surface. Once all the grid lines are formed, the reflector (10) is rinsed in appropriate solvents to remove excess organometallic compound.
REFERENCES:
patent: 4001836 (1977-01-01), Archer et al.
patent: 4286250 (1981-08-01), Sacchetti
patent: 4691091 (1987-09-01), Lyons et al.
patent: 4694138 (1987-09-01), Dodaira et al.
patent: 4757323 (1988-07-01), Duret et al.
Chang Stanley S.
Yeung Flora
Albritton C. L.
Denson-Low Wanda
Hughes Aircraft Company
Mitchell Steven M.
Westerlund Robert A.
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