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US3727296A Expired / Lapsed US ⏱️ 0.0 years remaining

Explosive bonding of workpieces

Assignee: Individual
•
Filing: 1970-08-31
•
Granted: 1973-04-17
•
Expires: 1990-08-31
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Abstract

Abstract First workpieces, for example, beam-leaded integrated circuits, and the like, are bonded to second workpieces, for example, metallized ceramic substrates by first depositing a quantity of primary explosive, such as lead azide, onto each beam lead and then detonating the explosive to explosively bond the integrated circuits to the substrate. In another embodiment of the invention, the explosive bonding force is applied through a buffer sheet of plastic or metallic material which protects the surface of the substrate from contamination and which, in addition, dampens the shock of the explosion. In yet another embodiment of the invention, metal conductive paths are explosively bonded directly to a ceramic or glass substrate to form a ''''printed circuit pattern.'''' The same techniques are used to manufacture resistors, capacitors, inductors, etc.

Inventors

  • 👤 B Cranston

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 21:46
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/06; B23K20/08; B23K20/085; H; H10; H10N; H10N97/00; H10W; H10W99/00; H10W72/00; H10W72/50; H10W72/551; H10W72/552; H10W72/5522; H10W72/5524; Y; Y10; Y10S; Y10S228/00; Y10S228/903

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 16 words
The method according to claim 1 wherein said first and said second workpieces comprise metallic workpieces.
Claim 2
Dependent Claim 23 words
The method according to claim 1 wherein said first workpiece comprises a metallic workpiece and said second workpiece comprises a metallized ceramic workpiece.
Claim 3
Dependent Claim 23 words
The method according to claim 1 wherein said first workpiece comprises a metallic workpiece and said second workpiece comprises a metallized glass workpiece.
Claim 4
Dependent Claim 33 words
The method according to claim 1 comprising the further step of: interposing at least one spacing element between said first and second workpieces to provide a gap through which said accelerAtion may occur.
Claim 5
Dependent Claim 28 words
In a method of explosively bonding a first workpiece to a second workpiece, the improvement comprising the use of a primary explosive to produce the explosive bonding force.
Claim 6
Dependent Claim 29 words
The method according to claim 8 comprising the further step of: maintaining a partial vacuum about said first and said second workpieces, prior to detonation of said primary explosive.
Claim 7
Independent Claim 80 words
A method bonding a first workpiece to a second workpiece, at least one of said workpieces having microscopic dimensions, comprising the steps of: moving said first and second workpieces into juxtaposition to each other; applying a quantity of primary explosive material to an outer surface of at least one of said workpieces, in the region to be bonded; and detonating said explosive material to accelerate at least one of said workpieces towards the other to form an explosive bond therebetween.
Claim 8
Dependent Claim 46 words
The method according to claim 8, said method comprising the further step of: displacing one of said workpieces, with respect to the other, so that an angle is created therebetween, through which angle the workpieces may accelerate towards each other when said explosive material is detonated.

References Cited (Backward Citations)

US26858A Cited
US2067213A Cited
US3132044A Cited
US3323204A Cited
US3346946A Cited
US3474520A Cited
US3434197A Cited
US3439408A Cited
US3543388A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-04-16 1976-10-16 1977-04-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-04-16 1980-10-16 1981-04-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-04-16 1984-10-16 1985-04-17 $7700.00 Window Closed / Lapsed

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