Metal working – Method of mechanical manufacture – Electrical device making
Patent
1988-08-26
1990-03-06
Arbes, Carl J.
Metal working
Method of mechanical manufacture
Electrical device making
20419215, 20419217, 20419226, H05K 334
Patent
active
049053710
ABSTRACT:
An apparatus and method for a cleaning process control is disclosed. The apparatus includes a printed wire circuit board that is made on a Pyrex glass or other transparent substrate. Components are attached to the printed wire circuit board and then the circuit card assembly which is formed is cleaned using a selected cleaning process. The circuit card assembly can then be inspected to determine the effectiveness of a particular cleaning process by flipping over the transparent circuit card, peering through the substrate to inspect for corrosion and solder balls. The circuit card assembly can then be cleaned more extensively and used again to check a different cleaning process.
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IBM Tech. Discl. Bull., vol. 18, No. 10, Mar. 1976, p. 3231-by Herdzik et al.
Angus Robert M.
Arbes Carl J.
Billion Richard E.
Control Data Corporation
Genovese Joseph A.
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