US3844026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bond preparation in electrical deflection-sensitive transducer
Assignee: Individual
•
Filing: 1973-06-14
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Granted: 1974-10-29
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Expires: 1993-06-14
Abstract
Abstract A method of preparing in an electrical deflection-sensitive transducer a bond between a piezoresistive element and a carrier therefor. The method includes the flowing of a mass of a gold-tin alloy (about 80 percent gold and about 20 percent tin, by weight) into intimate contact with the element and carrier, the solidifying of the flowed mass into a deposit joining the two, and the subsequent alternate heating (without liquefying) and chilling of the deposit to relieve stresses therein.
Inventors
- 👤 T Hutchins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:39
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/20; G01L1/22; G01L1/2287; G01L1/2293; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
64 words
A METHOD OF PREPARING IN AN ELECTRICL DEFLECTIONSENSITIVE TRANSDUCER AN ELECTRICALLY CONDUCTIVE, DIMENSIONALLY STABLE, SUBSTANTIALLY NONDISTORTING FORCE-TRANSMITTING BOND BETWEEN A PIEZORESISTIVE ELEMENT AND A CARRIER THEREFOR USED IN THE TRANSDUCER, SAID METHOD COMPRISING FLOWING INTO INTIMATE CONTACT WITH THE ELEMENT AND CARRIER A LIQUID MASS OF AN ALLOY CONSISTING OF GOLD AND TIN AND COMPRISING, BY WEIGHT, ABOUT 80% GOLD AND ABOUT 20% TIN,
Claim 2
Independent Claim
64 words
A METHOD OF PREPARING IN AN ELECTRICL DEFLECTIONSENSITIVE TRANSDUCER AN ELECTRICALLY CONDUCTIVE, DIMENSIONALLY STABLE, SUBSTANTIALLY NONDISTORTING FORCE-TRANSMITTING BOND BETWEEN A PIEZORESISTIVE ELEMENT AND A CARRIER THEREFOR USED IN THE TRANSDUCER, SAID METHOD COMPRISING FLOWING INTO INTIMATE CONTACT WITH THE ELEMENT AND CARRIER A LIQUID MASS OF AN ALLOY CONSISTING OF GOLD AND TIN AND COMPRISING, BY WEIGHT, ABOUT 80% GOLD AND ABOUT 20% TIN,
Claim 3
Dependent Claim
21 words
The method of claim 1 which further comprises, during said flowing, surrounding said liquid mass with a predominantly forming gas atmosphere.
Claim 4
Dependent Claim
20 words
The method of claim 2, wherein said surrounding is accomplished by directing a stream of forming gas over said mass.
Claim 5
Dependent Claim
23 words
The method of claim 1 which further comprises, during said flowing and solidifying steps, surrounding said mass with a predominantly forming gas atmosphere.
Claim 6
Dependent Claim
20 words
The method of claim 4, wherein said surrounding is accomplished by directing a stream of forming gas over said mass.
Claim 7
Dependent Claim
35 words
The method of claim 1, wherein said heating is accomplished by immersing said deposit in water at about 100* C., and said chilling is accomplished by immersing the deposit in water at about 0* C.
Claim 8
Independent Claim
186 words
A method of preparing in an electrical deflection-sensitive transducer an electrically conductive, dimensionally stable, substantially nondistorting force-transmitting bond between a piezoresistive element and a carrier therefor used in the transducer, wherein on the carrier at the location of intended joinder between it and the element there is a coating of gold, said method comprising placing adjacent said location a solid mass of a metal alloy consisting of gold and tin and comprising, by weight, about but less than 80 percent gold and about but more than 20 percent tin, liquefying said mass, flowing the liquefied mass into intimate contact with the element and carrier at said location, by said liquefying and flowing liquefying at least a portion of said coating, merging said liquefied coating portion with the liquefied mass to produce an alloy blend consisting, by weight, of 80 percent gold and 20 percent tin, solidifying such blend to produce a deposit thereof joined to and joining the element and carrier, without reliquefying the deposit, alternately, and a plurality of times, heating and chilling it, and by said heating and chilling relieving stresses in the deposit.
Claim 9
Independent Claim
186 words
A method of preparing in an electrical deflection-sensitive transducer an electrically conductive, dimensionally stable, substantially nondistorting force-transmitting bond between a piezoresistive element and a carrier therefor used in the transducer, wherein on the carrier at the location of intended joinder between it and the element there is a coating of gold, said method comprising placing adjacent said location a solid mass of a metal alloy consisting of gold and tin and comprising, by weight, about but less than 80 percent gold and about but more than 20 percent tin, liquefying said mass, flowing the liquefied mass into intimate contact with the element and carrier at said location, by said liquefying and flowing liquefying at least a portion of said coating, merging said liquefied coating portion with the liquefied mass to produce an alloy blend consisting, by weight, of 80 percent gold and 20 percent tin, solidifying such blend to produce a deposit thereof joined to and joining the element and carrier, without reliquefying the deposit, alternately, and a plurality of times, heating and chilling it, and by said heating and chilling relieving stresses in the deposit.
Claim 10
Dependent Claim
24 words
The method of claim 7 which further comprises, during said liquefying, flowing and merging steps, surrounding said location with a predominantly forming gas atmosphere.
Claim 11
Dependent Claim
20 words
The method of claim 8, wherein said surrounding is accomplished by directing a stream of forming gas over said location.
Claim 12
Dependent Claim
25 words
The method of claim 7 which further comprises during said liquefying, flowing, merging and solidifying steps, surrounding said location with a predominantly forming gas atmosphere.
Claim 13
Dependent Claim
20 words
The method of claim 10, wherein said surrounding is accomplished by directing a stream of forming gas over said location.
Claim 14
Dependent Claim
35 words
The method of claim 7, wherein said heating is accomplished by immersing the deposit in water at about 100* C., and said chilling is accomplished by immersiNg the deposit in water at about 0* C.
Claim 15
Independent Claim
104 words
A method of preparing in an electrical deflection-sensitive transducer an electrically conductive, dimensionally stable, substantially nondistorting force-transmitting bond between a piezoresistive element and a carrier therefor used in the transducer, said method comprising flowing into intimate contact with the element and carrier a liquid mass of a gold-tin alloy consisting, by weight, of 80 percent gold and 20 percent tin, solidifying the flowed mass to form a deposit of said alloy joined to and joining the element and carrier, without reliquefying the deposit, alternately, and a plurality of times, heating and chilling it, and by said heating and chilling relieving stresses in the deposit.
Claim 16
Independent Claim
104 words
A method of preparing in an electrical deflection-sensitive transducer an electrically conductive, dimensionally stable, substantially nondistorting force-transmitting bond between a piezoresistive element and a carrier therefor used in the transducer, said method comprising flowing into intimate contact with the element and carrier a liquid mass of a gold-tin alloy consisting, by weight, of 80 percent gold and 20 percent tin, solidifying the flowed mass to form a deposit of said alloy joined to and joining the element and carrier, without reliquefying the deposit, alternately, and a plurality of times, heating and chilling it, and by said heating and chilling relieving stresses in the deposit.
Claim 17
Dependent Claim
21 words
The method of claim 13, which further comprises, during said flowing, surrounding the liquid mass with a predominantly forming gas atmosphere.
Claim 18
Dependent Claim
20 words
The method of claim 14, wherein said surrounding is accomplished by directing a stream of forming gas over the mass.
Claim 19
Dependent Claim
23 words
The method of claim 13, which further comprises, during said flowing and solidifying steps, surrounding the mass with a predominantly forming gas atmosphere.
Claim 20
Dependent Claim
20 words
The method of claim 16, wherein said surrounding is accomplished by directing a stream of forming gas over the mass.
Claim 21
Dependent Claim
35 words
The method of claim 13, wherein said heating is accomplished by immersing the deposit in water at about 100* C., and said chilling is accomplished by immersing the deposit in water at about 0* C.
Claim 22
Independent Claim
145 words
A method of preparing in an electrical deflection-sensitive transducer an electrically conductive, dimensionally stable, substantially nondistorting force-transmitting bond between a piezoresistive element and a carrier therefor used in the transducer, said method comprising at a location where the element and carrier are to be joined, and with these parts disposed as desired adjacent one another, placing a mass of an alloy consisting of gold and tin and comprising, by weight, about 80 percent gold and about 20 percent tin, melting said mass, flowing the melted mass into intimate contact with the element and carrier at said location, cooling the flowed mass to solidify it as a deposit joined to and joining the element and carrier, at temperatures below the melting point of said deposit alternately, and a plurality of times, heating and chilling it, and by said heating and chilling relieving stresses in the deposit.
Claim 23
Independent Claim
145 words
A method of preparing in an electrical deflection-sensitive transducer an electrically conductive, dimensionally stable, substantially nondistorting force-transmitting bond between a piezoresistive element and a carrier therefor used in the transducer, said method comprising at a location where the element and carrier are to be joined, and with these parts disposed as desired adjacent one another, placing a mass of an alloy consisting of gold and tin and comprising, by weight, about 80 percent gold and about 20 percent tin, melting said mass, flowing the melted mass into intimate contact with the element and carrier at said location, cooling the flowed mass to solidify it as a deposit joined to and joining the element and carrier, at temperatures below the melting point of said deposit alternately, and a plurality of times, heating and chilling it, and by said heating and chilling relieving stresses in the deposit.
Claim 24
Dependent Claim
20 words
The method of claim 19 which further comprises, during said melting, surrounding the mass with a predominantly forming gas atmosphere.
Claim 25
Dependent Claim
21 words
The method of claim 20 which further comprises, during said flowing, surrounding the melted mass with a predominantly forming gas atmosphere.
Claim 26
Dependent Claim
21 words
The method of claim 21 which further comprises, during said cooling, surrounding the flowed mass with a predominantly forming gas atmosphere.
Claim 27
Dependent Claim
35 words
The method of claim 19, wherein said heating is accomplished by immersing the deposit in water at about 100* C., and said chilling is accomplished by immersing the deposit in water at about 0* C.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |