Method of manufacturing printed circuit boards
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United States of America Patent
Stats
-
Aug 31, 1993
Grant Date -
N/A
app pub date -
Jul 22, 1991
filing date -
Jul 24, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a method of manufacturing printed circuit boards by coating a flux preventive film for preventing a flux from rising on a component surface of an insulation board, the method of manufacturing printed circuit boards according to the present invention is characterized in that said method comprises the steps of printing white blank marks, white blank symbols and white blank letters corresponding to symbol marks, other symbols and letters on the component side surface of said insulation board before coating said flux preventive film, and then coating said flux preventive film of a transparent or translucent material on the printed surface.
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Family
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Cited Art Landscape
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