US3414487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing printed circuits
Assignee: Texas Instruments Inc
•
Filing: 1965-06-30
•
Granted: 1968-12-03
•
Expires: 1985-06-30
Abstract
No abstract record available.
Inventors
- 👤 John D Helms
- 👤 Jr Herbert L Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:17
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/20; H05K3/205; H05K2201/00; H05K2201/03; H05K2201/032; H05K2201/0329; H05K2203/00; H05K2203/01; H05K2203/0104; H05K2203/0117; H05K2203/03; H05K2203/0315; H05K2203/07; H05K2203/0703; H05K2203/0726; H05K3/38; H05K3/382; H05K3/385; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49155; Y10T29/49165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
THE METHOD OF PRODUCING A CONDUCTIVE PATTERN COMPRISING APPLYING TO A CONDUCTIVE FACE A MASKING LAYER, REMOVING PORTIONS OF THE MASKING LAYER TO FORM THEREIN OPENINGS WHICH EXPOSE PORTIONS OF SAID CONDUCTIVE FACE ACCORDING TO SAID PATTERN, APPLYING A RELEASING LAYER OVER THE MASKING LAYER AND SAID OPENINGS, IMMERSING THE FACE WITH THE MASKING AND RELEASING LAYERS THEREON IN AN ELECTROPLATING BATH WHEREIN THE FACE IS THE NEGATIVE POLE, THE TOTAL RESISTANCE OF THE MASKING AND RELEASING LAYERS IN AREAS WHERE THEY COEXIST ON THE FACE PREVENTING ELECTROPLATING OVER SUCH AREAS ON THE RELEASING LAYER, THE RELEASING LAYER BEING OF LESS RESISTANCE THAN SAID TOTAL RESISTANCE SO THAT WHERE IT ALONE COVERS THE CONDUCTIVE FACE OVER THE OPENINGS IT BECOMES PLATED WITH CONDUCTIVE MATERIAL IN RESPONSE TO THE NEGATIVE POLARITY OF THE FACE AREAS IN THE OPENINGS, AND THEREAFTER SEPARATING THE PLATED PATTERN AND THE RELEASING LAYER.
Claim 2
Independent Claim
147 words
THE METHOD OF PRODUCING A CONDUCTIVE PATTERN COMPRISING APPLYING TO A CONDUCTIVE FACE A MASKING LAYER, REMOVING PORTIONS OF THE MASKING LAYER TO FORM THEREIN OPENINGS WHICH EXPOSE PORTIONS OF SAID CONDUCTIVE FACE ACCORDING TO SAID PATTERN, APPLYING A RELEASING LAYER OVER THE MASKING LAYER AND SAID OPENINGS, IMMERSING THE FACE WITH THE MASKING AND RELEASING LAYERS THEREON IN AN ELECTROPLATING BATH WHEREIN THE FACE IS THE NEGATIVE POLE, THE TOTAL RESISTANCE OF THE MASKING AND RELEASING LAYERS IN AREAS WHERE THEY COEXIST ON THE FACE PREVENTING ELECTROPLATING OVER SUCH AREAS ON THE RELEASING LAYER, THE RELEASING LAYER BEING OF LESS RESISTANCE THAN SAID TOTAL RESISTANCE SO THAT WHERE IT ALONE COVERS THE CONDUCTIVE FACE OVER THE OPENINGS IT BECOMES PLATED WITH CONDUCTIVE MATERIAL IN RESPONSE TO THE NEGATIVE POLARITY OF THE FACE AREAS IN THE OPENINGS, AND THEREAFTER SEPARATING THE PLATED PATTERN AND THE RELEASING LAYER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |