US5036128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printed circuit board
Assignee: Poly Flex Circuits Inc
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Filing: 1990-01-30
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Granted: 1991-07-30
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Expires: 2010-01-30
Abstract
Abstract A method for producing a circuit board involves printing a U.V. curable ink onto a substrate in a desired circuit pattern and curing the ink by exposing it to a pulsed U.V. source or subjecting the circuit pattern prepared from a U.V. curable ink containing magnetite particles to a magnetic field to move the magnetite particles to the upper surface of the U.V. curable ink. Other embodiments include circuit boards made in accordance with these methods and the use of the U.V. curable ink as a shielding composition for enclosures housing electronic equipment.
Inventors
- 👤 David Durand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:11
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/12; H05K3/1283; C; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/101; C09D11/52; H01; H01B; H01B1/00; H01B1/20; H01B1/22; H01F; H01F41/00; H01F41/14; H01F41/16; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/095; H05K3/22; H05K3/24; H05K3/245; H05K2201/00; H05K2201/08; H05K2201/083; H05K2203/00; H05K2203/10; H05K2203/104; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/25; Y10T428/256
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
46 words
A U.V. curable ink comprising from about 33 to 38 weight percent of a thermosetting resin binder, 67-62 weight percent of spherical or spheroidal conductive particles having a particle size distribution ranging from 1 to 30 microns and an effective amount of a ketone-amine curing agent.
Claim 2
Dependent Claim
46 words
A U.V. curable ink comprising from about 33 to 38 weight percent of a thermosetting resin binder, 67-62 weight percent of spherical or spheroidal conductive particles having a particle size distribution ranging from 1 to 30 microns and an effective amount of a ketone-amine curing agent.
Claim 3
Dependent Claim
15 words
The U.V. curable ink of claim 1 wherein said ketone-amine curing agent comprises Michler's ketone.
Claim 4
Dependent Claim
20 words
The U.V. curable ink of claim 2 wherein said ketone-amine curing agent comprises a mixture of benzophenone and Michler's ketone.
Claim 5
Dependent Claim
37 words
The U.V. curable ink of claim 1 wherein said conductive particles comprise silver coated glass spheres wherein the silver comprises about 8 to 12 weight percent based on the total weight of said silver coated glass spheres.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |