Liquid purification or separation – Structural installation – Closed circulating system
Patent
1995-03-30
1997-02-04
Lithgow, Thomas M.
Liquid purification or separation
Structural installation
Closed circulating system
210196, 210405, 210456, 134 10, 134 42, 216 93, 1566421, B01D 2990, B01D 3372, C23F 100, H01L 213105
Patent
active
055994440
ABSTRACT:
An apparatus for removing polymer particles from the stripping solution used in the treatment of printed wireboards comprises passing a solution having resist particles dispersed therein over a screen having openings of 100 microns, where the screen is maintained at an angle of from 40 to 70.degree. to the horizontal. The apparatus comprises a curtain tube consisting of an inner concentric tube with a plurality of holes and an outer concentric tube with a slot wherein the position of the slot is adjustable, a filter comprising a screen, and a pump for circulating the solution. In one embodiment, the filter comprises a cylindrical screen.
The stripping solution comprises an aqueous solution of an organoamine, ionic nitrogen compound or alkali or alkaline-earth hydroxide, or mixtures thereof.
REFERENCES:
patent: 2317430 (1943-04-01), Ayens
patent: 2825462 (1958-03-01), Hackney
patent: 2905323 (1959-09-01), Megesi
patent: 3043432 (1962-07-01), Megesi
patent: 3744995 (1973-07-01), MacKay
patent: 3782555 (1974-01-01), Solum
patent: 3792845 (1974-02-01), Larson et al.
patent: 3833123 (1974-09-01), Walker
patent: 4008154 (1977-02-01), Richards
patent: 4046156 (1977-09-01), Cook
patent: 4113626 (1978-09-01), Detcher
patent: 4202777 (1980-05-01), Schall
patent: 4240617 (1980-12-01), MacKay
patent: 4325732 (1982-04-01), Woog
patent: 4371422 (1983-02-01), Eidschun
patent: 4430210 (1984-02-01), Tuuha
patent: 4441697 (1984-04-01), Peterson
patent: 4608177 (1986-08-01), Woog
patent: 4661253 (1987-04-01), Williams
patent: 4662613 (1987-05-01), Woog
patent: 4760014 (1988-07-01), Wong
patent: 4784169 (1988-11-01), Striedieck
patent: 4857206 (1989-08-01), Choo
patent: 4867879 (1989-09-01), Muller
patent: 4921571 (1990-05-01), Kukanskis et al.
patent: 4988448 (1991-01-01), Woog
patent: 4999114 (1991-03-01), Choo
patent: 5017267 (1991-05-01), Cordani
patent: 5026029 (1991-06-01), Peterson
patent: 5178759 (1993-01-01), Gurrian
patent: 5211843 (1993-05-01), Wester
patent: 5232460 (1993-08-01), Botz
patent: 5248382 (1993-09-01), Soukup
patent: 5531889 (1996-07-01), Baron
Baron David T.
Johal Kuldip S.
Taylor Alexander R.
Atotech USA, Inc.
Lithgow Thomas M.
Marcus Stanley A.
LandOfFree
Apparatus for removing resist particles from stripping solutions does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for removing resist particles from stripping solutions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for removing resist particles from stripping solutions will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-675269