Screen mask

Details Screen mask Screen mask

2007-04-10

2007-04-10

Dinh, Tuan (Department: 2841)

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

C361S767000, C361S774000

Reexamination Certificate

active

11496370

ABSTRACT:
A film carrier tape for mounting electronic parts comprises an insulating film, a wiring pattern formed on a surface of the insulating film, and a solder resist layer formed by moving a squeegee using a screen mask of a prescribed pattern that is formed in such a manner that connecting terminal portions of the wiring pattern should be exposed. The edge of the solder resist layer is formed almost in parallel or almost at right angles to the moving direction of the squeegee used in the application of the solder resist. The solder resist layer can be formed by the use of a screen mask for solder resist coating in which the edge of the screen that is unmasked to apply the solder resist is formed almost in parallel or almost at right angles to the moving direction of the squeegee used in the application of the solder resist. According to the present invention, the fraction defective of the solder resist coating can be decreased.

REFERENCES:
patent: 6268645 (2001-07-01), Takenaka et al.
patent: 6559524 (2003-05-01), Seko
patent: 6570259 (2003-05-01), Alcoe et al.
patent: 6657697 (2003-12-01), Yamate et al.

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