Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1991-07-22
1993-08-31
Beck, Shrive
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
427 97, 427143, 427161, C23C 2600
Patent
active
052407373
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.
REFERENCES:
patent: 4259391 (1981-03-01), Brecht
patent: 4486466 (1984-12-01), Leech
patent: 4806706 (1989-02-01), Machida
patent: 4925705 (1990-05-01), Hill
patent: 5055342 (1991-10-01), Markovich
patent: 5093183 (1992-03-01), Strunka
Ichikawa Jun-ichi
Kawakami Shin
Okonogi Hirotaka
Adams Bruce L.
Beck Shrive
Dang Vi Duong
Nippon CMK Corp.
Wilks Van C.
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