Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1986-07-08
1988-05-03
Newsome, John H.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
430308, B05D 306
Patent
active
047419202
ABSTRACT:
A greatly improved printing screen used for screen printing is provided in respect of the durability in printing, resistance against solvents and antistatic performance based on a mesh of polyester or nylon filaments. According to the invention, the base mesh is subjected to exposure to low temperature plasma of an inorganic gas prior to coating with a photosensitive resin composition in the form of an aqueous emulsion. When the plasma-treated mesh is coated, prior to coating with the photosensitive resin emulsion, with a surface active agent or when the photosensitive resin emulsion is admixed with a surface active agent, further improvement can be obtained in the antistatic performance of the screen. When a base screen dyed in yellow is used, the drawbacks caused by halation in the pattern-wise exposure of the screen to light can be greatly reduced.
REFERENCES:
patent: 3477902 (1969-11-01), Tomasino et al.
patent: 4072769 (1978-02-01), Lidel
patent: 4154614 (1979-05-01), Tsunoda et al.
patent: 4302528 (1981-11-01), Sano et al.
patent: 4466258 (1984-08-01), Sando et al.
Emori Yasuo
Fushimi Kenji
Ishikawa Keiichi
Nakanishi Toru
Ueno Susumu
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