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US5138434A Expired / Lapsed US ⏱️ 0.0 years remaining

Packaging for semiconductor logic devices

Assignee: Micron Technology Inc
•
Filing: 1991-01-22
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Granted: 1992-08-11
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Expires: 2011-01-22
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Abstract

Abstract A logic module design is disclosed which incorporates an unencapsulated wafer section or sections. The disclosed module is an improvement over previous designs in that it is less expensive and easier to manufacture due to the reduced number of components and the complexity of the components, is faster and consumes less power because of its shorter trace lengths and smaller size, and is more reliable as a result of its greatly reduced number of interconnects.

Inventors

  • 👤 Alan G. Wood
  • 👤 Tim J. Corbett

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 20:50
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/10; H10W76/12; H10W76/15; H10W76/157; G; G11; G11C; G11C5/00; H10W70/00; H10W70/60; H10W70/67; H10W70/68; H10W70/685

Claims Analysis

Total Claims: 14
Claim 1
Independent Claim 181 words
A memory module for receiving information from, and transferring information to, an electronic device in a plurality of parallel processes, the plurality of parallel processes being addressed as a byte of said information, comprising: a. a wafer section having a substantially planar surface, die attach locations, plural memory arrays, and plural data out signals, with one data out signal corresponding to each memory array; b. a plurality of conductive leads, said leads being self-supporting for connection of said wafer section to an external device without the benefit of supporting encapsulation material, said leads further being electrically coupled with said wafer section die attach locations thereby providing an electrical pathway allowing the transfer of said logic information between said wafer section and the electronic device, said pathway providing channels between said wafer section and the electronic device, said wafer section thereby addressable in byte data segments; and c. said plurality of conductive leads and said wafer section forming a module which has a substantially flat profile, which extends planarly in a direction generally defined by said planar surface of said wafer section.
Claim 2
Dependent Claim 181 words
A memory module for receiving information from, and transferring information to, an electronic device in a plurality of parallel processes, the plurality of parallel processes being addressed as a byte of said information, comprising: a. a wafer section having a substantially planar surface, die attach locations, plural memory arrays, and plural data out signals, with one data out signal corresponding to each memory array; b. a plurality of conductive leads, said leads being self-supporting for connection of said wafer section to an external device without the benefit of supporting encapsulation material, said leads further being electrically coupled with said wafer section die attach locations thereby providing an electrical pathway allowing the transfer of said logic information between said wafer section and the electronic device, said pathway providing channels between said wafer section and the electronic device, said wafer section thereby addressable in byte data segments; and c. said plurality of conductive leads and said wafer section forming a module which has a substantially flat profile, which extends planarly in a direction generally defined by said planar surface of said wafer section.
Claim 3
Dependent Claim 17 words
The memory module of claim 1, further comprising an optically opaque layer superimposed over said wafer section.
Claim 4
Dependent Claim 23 words
The memory module of claim 1, wherein one of said data out signals has been deselected, and said corresponding memory array is inactive.
Claim 5
Dependent Claim 18 words
The memory module of claim 1, wherein said wafer section further comprises more than one unsingulated semiconductor die.
Claim 6
Dependent Claim 37 words
The memory module of claim 1, wherein said die attach locations are electrically coupled with said conductive leads by flex circuit means, wherein said flex circuit comprises plural internal conductive traces substantially encased in an insulative material.
Claim 7
Dependent Claim 19 words
The memory module of claim 5, wherein said traces are coupled with said die attach locations by solder means.
Claim 8
Dependent Claim 11 words
The memory module of claim 5, wherein said solder comprises gold.
Claim 9
Dependent Claim 59 words
The memory module of claim 1, wherein conductive and nonconductive layers are fabricated on the surface of said wafer section subsequent to the fabrication of said die attach locations, said die attach locations being electrically coupled with one or more of said conductive layers and said conductive leads are electrically coupled with one or more of said conductive layers.
Claim 10
Dependent Claim 18 words
The memory module of claim 1, wherein said wafer section is free from any substantially supporting encapsulation material.
Claim 11
Dependent Claim 17 words
The memory module of claim 1, wherein said wafer section is substantially encased in supporting encapsulation material.
Claim 12
Dependent Claim 21 words
The memory module of claim 1, further comprising a support member wherein said wafer section is received upon said support member.
Claim 13
Dependent Claim 13 words
The memory module of claim 11, further comprising more than one wafer section.
Claim 14
Dependent Claim 15 words
The memory module of claim 11, wherein the composition of said support member comprises aluminum.

References Cited (Backward Citations)

US4922378A Cited
US4949163A Cited
US4855809A Cited
US4975763A Cited
US4899107A Cited
US4967262A Cited
US5020999A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1995-08-11 1996-02-10 1996-08-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1999-08-11 2000-02-10 2000-08-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2003-08-11 2004-02-10 2004-08-11 $7700.00 Window Closed / Lapsed

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