US5421079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High density, high performance memory circuit package
Assignee: International Business Machines Corp
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Filing: 1993-11-08
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Granted: 1995-06-06
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Expires: 2013-11-08
Abstract
Abstract A high density circuit package includes a pair of planar packages, the planar packages exhibiting front and back surfaces and positioned back-to-back in the high density circuit package. Each planar package includes a flexible circuit carrier having a plurality of circuit chips mounted thereon. Front and back planar metallic heat sinks sandwich the circuit carriers, at least one of the heat sinks contacting a surface of the chips mounted on the sandwiched circuit carriers. Each heat sink is provided with air flow apertures formed in its planar surface and adjacent to each circuit chip. A circuit card interconnects with the circuit carriers in an interconnection region and is pluggable into a female connector. The planar metallic heat sinks and circuit carriers are mechanically packaged so as to provide a planar arrangement which aligns the apertures in both the front and rear heat sinks. A pair of planar packages are mechanically connected in a back-to-back arrangement so that the apertures therebetween are aligned. The associated circuit cards are also back-to-back oriented so as to enable their joint interconnection into the female connector.
Inventors
- 👤 Thomas M. Cipolla
- 👤 Paul W. Coteus
- 👤 Alphonso P. Lanzetta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:48
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/02; H05K7/023; H05K3/00; H05K3/30; H05K3/301; H10; H10W; H10W90/00; H10W70/00; H10W70/60; H10W90/20; H10W90/288; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/5313; Y10T29/53265
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
130 words
A fixture for emplacing a TAB package, having a chip mounted thereon, onto a circuit carrier, said TAB package having alignment apertures positioned therein and exhibiting extending bent peripheral conductors which protrude beneath a planar surface of said TAB package, said fixture comprising: a polygonal planar surface having alignment pins extending therefrom that mate with the alignment apertures in said TAB package; and stand-off means extending from said polygonal surface in a direction of protrusion of said bent peripheral conductors, said stand-off means positioned so as not to touch said conductors but to contact said circuit carrier when said fixture and a TAB package are brought into proximity to said circuit carrier, and to enable said peripheral conductors to contact conductive pads on said circuit carrier, without being substantially deformed.
Claim 2
Dependent Claim
130 words
A fixture for emplacing a TAB package, having a chip mounted thereon, onto a circuit carrier, said TAB package having alignment apertures positioned therein and exhibiting extending bent peripheral conductors which protrude beneath a planar surface of said TAB package, said fixture comprising: a polygonal planar surface having alignment pins extending therefrom that mate with the alignment apertures in said TAB package; and stand-off means extending from said polygonal surface in a direction of protrusion of said bent peripheral conductors, said stand-off means positioned so as not to touch said conductors but to contact said circuit carrier when said fixture and a TAB package are brought into proximity to said circuit carrier, and to enable said peripheral conductors to contact conductive pads on said circuit carrier, without being substantially deformed.
Claim 3
Dependent Claim
20 words
The fixture as recited in claim 1 wherein said stand-off means are posts that extend from said polygonal planar surface.
Claim 4
Dependent Claim
25 words
The fixture as recited in claim 2 wherein said alignment pins have a diameter that enables an interference fit when inserted into said alignment apertures.
Claim 5
Dependent Claim
124 words
A fixture for emplacing a TAB package, having a chip mounted thereon, onto a circuit carrier, said TAB package having alignment apertures positioned therein and exhibiting extending bent peripheral conductors, said fixture comprising: a polygonal planar surface having alignment pins extending therefrom that mate with the alignment apertures in said TAB package, said alignment pins having a diameter that enables an interference fit when inserted into said alignment apertures; and flange means extending about and protruding from said polygonal surface in a direction of said bent peripheral conductors, said flange means operative, when said fixture and a TAB package are brought into proximity to a circuit carrier, to enable said peripheral conductors to contact conductive pads on said circuit carrier, without being substantially deformed.
Claim 6
Dependent Claim
124 words
A fixture for emplacing a TAB package, having a chip mounted thereon, onto a circuit carrier, said TAB package having alignment apertures positioned therein and exhibiting extending bent peripheral conductors, said fixture comprising: a polygonal planar surface having alignment pins extending therefrom that mate with the alignment apertures in said TAB package, said alignment pins having a diameter that enables an interference fit when inserted into said alignment apertures; and flange means extending about and protruding from said polygonal surface in a direction of said bent peripheral conductors, said flange means operative, when said fixture and a TAB package are brought into proximity to a circuit carrier, to enable said peripheral conductors to contact conductive pads on said circuit carrier, without being substantially deformed.
Claim 7
Dependent Claim
23 words
The fixture as recited in claim 4 wherein pins extend outwardly from said flange to enable alignment thereof by an automatic viewing/positioning system.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-06-05 | 1998-12-05 | 1999-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-05 | 2002-12-05 | 2003-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-05 | 2006-12-05 | 2007-06-06 | $7700.00 | Window Closed / Lapsed |