US5032426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for applying liquid coatings on the surface of printed circuit boards
Assignee: MacDermid Enthone Inc
•
Filing: 1989-05-15
•
Granted: 1991-07-16
•
Expires: 2009-05-15
Abstract
Abstract A method and apparatus is provided for applying liquid coatings such as solder masks sequentially to both sides of a printed circuit board substrate whereby only one drying operation would be needed to dry the liquid coatings. An isolation platen having openings corresponding to the coated parts of the board is used to provide a space between the coated part and the opposite side of the platen.
Inventors
- 👤 Harold R. Sumner, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:39
CPC Classifications
B; B41; B41F; B41F15/00; B41F15/14; B41F15/16; B41F15/18; B41F15/26; H; H05; H05K; H05K3/00; H05K3/0091; H05K2203/00; H05K2203/01; H05K2203/0147; H05K2203/0165; H05K2203/0173; H05K2203/15; H05K2203/1563; H05K3/10; H05K3/12; H05K3/1216
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
98 words
A method for applying liquid coatings sequentially to both sides of a printed circuit board substrate whereby only one drying cycle need be used to dry the liquid coatings comprising applying a coating to one side of the substrate, placing an isolation platen in contact with the coated side of said substrate, which platen has openings corresponding to the coated parts of the substrate and a space between the coated parts and the opposite side of the platen, inverting the substrate and platen, applying a coating to the other side of the substrate and drying the coated substrate.
Claim 2
Independent Claim
98 words
A method for applying liquid coatings sequentially to both sides of a printed circuit board substrate whereby only one drying cycle need be used to dry the liquid coatings comprising applying a coating to one side of the substrate, placing an isolation platen in contact with the coated side of said substrate, which platen has openings corresponding to the coated parts of the substrate and a space between the coated parts and the opposite side of the platen, inverting the substrate and platen, applying a coating to the other side of the substrate and drying the coated substrate.
Claim 3
Dependent Claim
43 words
The method of claim 1 wherein the isolation platen is hollow and contains openings which communicate with the substrate placed on the platen, which openings hold the substrate in place when the coated substrate is placed on the platen and a vacuum applied.
References Cited (Backward Citations)
US3433888A
Cited
US3465435A
Cited
US4031268A
Cited
US4436806A
Cited
US4600601A
Cited
US4799958A
Cited
US4678531A
Cited
US4784310A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-15 | 1995-01-14 | 1995-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-15 | 1999-01-14 | 1999-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-15 | 2003-01-14 | 2003-07-16 | $7700.00 | Window Closed / Lapsed |