Surface treatment equipment for treating circuit boards

Details Surface treatment equipment for treating circuit boards Surface treatment equipment for treating circuit boards

1999-04-09

1999-11-30

Saadat, Mahshid

Active solid-state devices (e.g., transistors, solid-state diode

Combined with electrical contact or lead

Of specified configuration

204201, 134 221, H01L 2348, C25D 1700

Patent

active

059947829

ABSTRACT:
A circuit board surface treatment equipment, which includes an upper solution chamber and a bottom solution chamber defined within a machine base at different elevations, a set of conveying rollers and upper and lower bumper rollers arranged in the upper solution chamber and controlled to deliver circuit boards through the upper solution chamber for treatment, upper and lower pressure-balanced water knives respectively mounted in gaps in between the conveying rollers and controlled to eject a surface treatment solution onto the circuit boards, and water level control switch means which open the passage between the upper solution chamber and the bottom solution chamber for letting the surface treatment solution flow from the upper solution chamber to the bottom solution chamber when the level of surface treatment solution in the upper solution chamber surpasses a predetermined high level.

REFERENCES:
patent: 4620894 (1986-11-01), Gurian et al.
patent: 4964365 (1990-10-01), D'Amato
patent: 5176158 (1993-01-01), Ketelhohn et al.
patent: 5378307 (1995-01-01), Bard et al.
patent: 5529081 (1996-06-01), Kappler
patent: 5601737 (1997-02-01), Asahi et al.

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