Recorders – Electric recording – Electrochemical
Patent
1989-01-04
1990-04-24
Evans, Arthur G.
Recorders
Electric recording
Electrochemical
346150, G01D 1500
Patent
active
049203630
ABSTRACT:
The method of manufacturing an electrostatic printhead or the like. Conductive surfaces are applied to both sides of an insulating substrate. Unneeded portions of the conductive surface are etched away by a photolithographic process to form conductive layers in patterns of parallel, spaced, printwire traces and connective conductors with ends of the printwire traces terminating in a common plane defining a printface of the printhead. Additional conductive material is added to the printwire traces by an additive plating process to give them a substantially square cross-section. The edge is laser trimmed to form the print face. Insulative layers are added over both sides with vias located over the connective conductors at places where electrical connection is to take place. A plurality of conductive busses are then formed on the insulative layers crossing over the connective conductors and vias with conductive material formed in the vias to make the desired electrical connections between the connective conductors and the busses.
REFERENCES:
patent: 4415403 (1983-11-01), Bakewell
CalComp Inc.
Evans Arthur G.
Porter, Jr. William F.
Streck Donald A.
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