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US3753054A Expired / Lapsed US ⏱️ 0.0 years remaining

Hermetically sealed electronic package

Assignee: Texas Instruments Inc
•
Filing: 1971-10-13
•
Granted: 1973-08-14
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Expires: 1991-10-13
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Abstract

Abstract In a method of housing semiconductors, a sealing collar formed from a nickel-cobalt-iron alloy is mounted on a ceramic boat. An LSI slice is then mounted on the boat within the collar. Finally, a lid formed from the material of the collar is welded to the distal end of the collar. In a second embodiment of the method, the boat is formed from a ceramic ring, a nickel-cobalt-iron alloy plate and a molybdenum plate. In a third embodiment, an LSI slice and at least one conventional integrated circuit are mounted on the boat within the collar.

Inventors

  • 👤 C Johnson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 08:55
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/10; H10W76/12; H10W76/15; H10W76/157; H10W70/00; H10W70/60; H10W78/00; H10W90/00; H10W72/00; H10W72/50; H10W72/541; H10W72/5449; H10W72/551; H10W72/552; H10W72/5522; H10W90/701; H10W90/751; H10W90/753

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 108 words
A hermetically sealed electronic package as set forth in claim 1, wherein said closure means comprises: an endless rim fixedly secured to the top surface of said base portion of said boat intermediate the inner and outer peripheries thereof and extending about the central cavity provided therein, said endless rim overlying an intermediate portion of each of said plurality of connector strips, an upstanding endless sealing collar fixedly secured to the upper surface of said endless rim and projecting upwardly therefrom, and a sealing lid fixedly secured to a portion of said collar remote from said boat and enclosing said slice within said boat in hermetically sealed relationship.
Claim 2
Dependent Claim 39 words
A hermetically sealed electronic package as set forth in claim 2, wherein said collar is secured to the upper surface of said endless rim by a malleable braze joint, said lid is seucred to said collar by a weld.
Claim 3
Dependent Claim 31 words
A hermetically sealed electronic package as set forth in claim 2, wherein said boat, said endless rim, said collar and said lid are made of materials having matched thermal expansion characteristics.
Claim 4
Dependent Claim 120 words
A hermetically sealed electronic package as set forth in claim 1, wherein said boat comprises: a first plate defining the bottom wall of the central cavity and on which said slice is disposed, said first plate having thermal expansion characteristics similar to those of said slice, an outer endless member extending about said first plate and defining said raised base portion, said outer endless member having thermal expanson characteristics similar to those of said closure means, and a second plate disposed beneath said first plate and secured thereto in supporting engagement therewith, said second plate being further secured along its outer margin to said outer endless member and having thermal expansion characteristics similar to those of said outer endless member.
Claim 5
Dependent Claim 66 words
A hermetically sealed electronic package as set forth in claim 1, further including an integrated circuit chip mounted within said closure means on the top surface of said base portion at the inner periphery thereof, and a plurality of interconnecting electrical conductors extending from said integrated circuit chip to said slice and selected ones of said connector strips respectively and interconnecting said integrated circuit chip therebetween.
Claim 6
Dependent Claim 90 words
A hermetically sealed electronic package as set forth in claim 1, further including a plurality of electrical leads disposed externally of said boat and being respectively electrically connected to the exposed outer ends of said plurality of connector strips, and a segmental carrier assembly including upper and lower carrier members disposed externally of said boat, said upper and lower carrier members being positioned on opposite sides of said plurality of electrical leads, and means clamping said upper and lower carrier members in place on opposite sides of said electrical leads.
Claim 7
Dependent Claim 83 words
A hermetically sealed electronic package as set forth in claim 2, wherein said lid includes: a substantially flat central portion covering the central cavity and the slice disposed therein and overlying an inner marginal portion of said endless rim, and an upstanding endless marginal flange integral with said flat central portion and disposed inwardly of and in frictional engagement with said collar; and a weld between said collar and said upstanding marginal flange of said lid hermetically sealing said slice within said boat.
Claim 8
Dependent Claim 31 words
A hermetically sealed electronic package as set forth in claim 8, wherein said weld is located between the upper edges of saId collar and said upstanding marginal flange of said lid.
Claim 9
Dependent Claim 57 words
A hermetically sealed electronic package as set forth in claim 8, wherein said collar is provided with an endless outwardly projecting bead thereon cooperating with said upstanding marginal flange of said lid to define an endless channel in which a band of meltable weld material is initially disposed such that said weld is located in said channel.

References Cited (Backward Citations)

US3435516A Cited
US3303265A Cited
US3190952A Cited
US3331125A Cited
US3374537A Cited
US3337678A Cited
US3538597A Cited
US3509430A Cited
US3619734A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-08-13 1977-02-12 1977-08-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-08-13 1981-02-12 1981-08-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-08-13 1985-02-12 1985-08-14 $7700.00 Window Closed / Lapsed

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