Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1985-04-16
1986-07-15
Powell, William A.
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
156640, 156642, 1566611, 156345, 252 792, C23F 102, B44C 122, C03C 1500, C03C 2506
Patent
active
046004700
ABSTRACT:
A method for etching an array of apertures through a carbon-steel sheet wherein, for each of the majority of said apertures, the ratio of the desired smallest cross-sectional dimension thereof to the thickness of said sheet is less than about 0.9, said sheet having etch-resistant stencils on opposite major surfaces thereof, said method comprising contacting said stencilled major surfaces with ferric chloride etchant having a specific gravity in a range at which a smooth finish is realized.
REFERENCES:
patent: 3679500 (1972-07-01), Kubo et al.
patent: 3971682 (1976-07-01), Frantzen et al.
patent: 4126510 (1978-11-01), Moscony et al.
patent: 4482426 (1984-11-01), Maynard et al.
R. B. Maynard et al., "Ferric Chloride Etching of Low Carbon Steels", RCA Review 45, 73-89, (Mar. 1984).
Maynard Richard B.
Moscony John J.
Saunders Margaret H.
Coughlin Jr. Vincent J.
Irlbeck Dennis H.
Powell William A.
RCA Corporation
Whitacre Eugene M.
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