Patent US3224072A successfully refreshed from Google Patents.
US3224072A
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Method of forming an electrical connection to an insulating base
Assignee: BAC AND BRITISH AEROSPACE
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Filing: 1962-12-27
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Granted: 1965-12-21
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Expires: 1982-12-27
Abstract
No abstract record available.
Inventors
- 👤 Summers Leo Ewart Arthur
- 👤 Horwood Roger John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:09
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/40; C23; C23C; C23C14/00; C23C14/02; C23C14/024; C23C14/025; C23C14/22; C23C14/54; C23C14/541; H01; H01B; H01B1/00; C04; C04B; C04B2235/00; C04B2235/60; C04B2235/604; H05K2201/00; H05K2201/03; H05K2201/0302; H05K2201/0317; H05K3/00; H05K3/38; H05K3/388; Y; Y10; Y10S; Y10S228/00; Y10S228/903; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/4913; Y10T29/49144; Y10T29/49147; Y10T29/49149; Y10T29/49155; Y10T29/49162
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
A METHOD OF FORMING ON AN INSULATING BASE AN ELEMENT OF A METAL OF HIGH ELECTRICAL CONDUCTIVITY COMPRISING THE STEPS OF DEPOSITING ON THE BASE IN A VACUUM CHAMBER A PRIMARY LAYER OF A METAL DIFFERENT FROM SAID HIGHLY CONDUCTIVE METAL AND WHICH WILL PROVIDE GOOD BONDS BOTH BETWEEN ITSELF AND THE MATERIAL OF THE BASE AND BETWEEN ITSELF AND SAID HIGHLY CONDUCTIVE METAL, THEN DEPOSITING ON SAID PRIMARY LAYER BY VACUUM DEPOSITION AT LEAST THREE LAYERS OF SAID HIGHLY CONDUCTIVE METAL, THE TEMPERATURE OF THE BASE BEING REDUCED FOR THE DEPOSITING OF EACH SUCCESSIVE LAYER OF SAID HIGHLY CONDUCTIVE METAL AND THE DEPOSITION OF EACH SUCCESSIVE LAYER OF HIGHLY CONDUCTIVE METAL BEING CONTINUED UNTIL IT IS THICKER THAN THE PRECEEDING ONE.
Claim 2
Independent Claim
122 words
A METHOD OF FORMING ON AN INSULATING BASE AN ELEMENT OF A METAL OF HIGH ELECTRICAL CONDUCTIVITY COMPRISING THE STEPS OF DEPOSITING ON THE BASE IN A VACUUM CHAMBER A PRIMARY LAYER OF A METAL DIFFERENT FROM SAID HIGHLY CONDUCTIVE METAL AND WHICH WILL PROVIDE GOOD BONDS BOTH BETWEEN ITSELF AND THE MATERIAL OF THE BASE AND BETWEEN ITSELF AND SAID HIGHLY CONDUCTIVE METAL, THEN DEPOSITING ON SAID PRIMARY LAYER BY VACUUM DEPOSITION AT LEAST THREE LAYERS OF SAID HIGHLY CONDUCTIVE METAL, THE TEMPERATURE OF THE BASE BEING REDUCED FOR THE DEPOSITING OF EACH SUCCESSIVE LAYER OF SAID HIGHLY CONDUCTIVE METAL AND THE DEPOSITION OF EACH SUCCESSIVE LAYER OF HIGHLY CONDUCTIVE METAL BEING CONTINUED UNTIL IT IS THICKER THAN THE PRECEEDING ONE.
Claim 3
Independent Claim
156 words
A METHOD OF FORMING ON AN INSULATING BASE AN ELEMENT OF GOLD AND OF CONNECTING A GOLD WIRE THERETO, COMPRISING THE STEPS OF DEPOSITING ON THE BASE IN A VACUUM CHAMBER A PRIMARY LAYER OF A DIFFERENT METAL WHICH WILL PROVIDE GOOD BONDS BOTH BETWEN ITSELF AND THE MATERIAL OF THE BASE AND BETWEEN ITSELF AND GOLD, THEN DEPOSITING ON SAID PRIMARY LAYER BY A VACUUM DEPOSITION METHOD COMPRISING THE EVAPORATION OF A GOLD SOURCE AT LEAST THREE LAYERS OF GOLD, THE TEMPERATURE OF THE BASE BEING REDUCED FOR THE DEPOSITING OF EACH SUCCESSIVE LAYER OF GOLD AND THE DEPOSITION OF EACH SUCCESSIVE LAYER OF GOLD BEING CONTINUED UNTIL IT IS THICKER THAN THE PRECEEDING ONE, PREHEATING THE INSULATING BASE WITH A STREAM OF HOT INERT GAS AN BONDING THE GOLD WIRE TO THE TOP LAYER OF THE DEPOSITED GOLD ELELMETN BY THE APPLICATION OF HEAT AN DPRESSURE IN THE PRESENCE OF THE HOT INERT GAS.
Claim 4
Independent Claim
156 words
A METHOD OF FORMING ON AN INSULATING BASE AN ELEMENT OF GOLD AND OF CONNECTING A GOLD WIRE THERETO, COMPRISING THE STEPS OF DEPOSITING ON THE BASE IN A VACUUM CHAMBER A PRIMARY LAYER OF A DIFFERENT METAL WHICH WILL PROVIDE GOOD BONDS BOTH BETWEN ITSELF AND THE MATERIAL OF THE BASE AND BETWEEN ITSELF AND GOLD, THEN DEPOSITING ON SAID PRIMARY LAYER BY A VACUUM DEPOSITION METHOD COMPRISING THE EVAPORATION OF A GOLD SOURCE AT LEAST THREE LAYERS OF GOLD, THE TEMPERATURE OF THE BASE BEING REDUCED FOR THE DEPOSITING OF EACH SUCCESSIVE LAYER OF GOLD AND THE DEPOSITION OF EACH SUCCESSIVE LAYER OF GOLD BEING CONTINUED UNTIL IT IS THICKER THAN THE PRECEEDING ONE, PREHEATING THE INSULATING BASE WITH A STREAM OF HOT INERT GAS AN BONDING THE GOLD WIRE TO THE TOP LAYER OF THE DEPOSITED GOLD ELELMETN BY THE APPLICATION OF HEAT AN DPRESSURE IN THE PRESENCE OF THE HOT INERT GAS.
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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |