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US5480834A Expired / Lapsed US ⏱️ 0.0 years remaining

Process of manufacturing an electrical bonding interconnect having a metal bond pad portion and having a conductive epoxy portion comprising an oxide reducing agent

Assignee: Round Rock Research LLC
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Filing: 1993-12-13
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Granted: 1996-01-02
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Expires: 2013-12-13
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Abstract

Abstract A process for manufacturing a low contact resistance electrical bonding interconnect having a metal bond pad portion and conductive epoxy portion. The conductive epoxy portion comprises a metal oxide reducing agent for reducing oxides formed during the fabrication of the bonding interconnect.

Inventors

  • 👤 Rickie C. Lake
  • 👤 Mark E. Tuttle

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 10:58
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/321; H10; H10W; H10W72/00; H10W72/01; H10W72/012; H05K2201/00; H05K2201/10; H05K2201/10613; H05K2201/10621; H05K2201/10674; H05K2201/10954; H05K2201/10984; H10W72/071; H10W72/072; H10W72/07231; H10W72/07236; H10W72/07251; H10W72/073; H10W72/07331; H10W72/20; H10W72/251; H10W72/253; H10W72/30; H10W72/351; H10W72/352; H10W72/353; H10W72/354; H10W72/50; H10W72/531; H10W72/536; H10W72/90; H10W72/921; H10W72/923; H10W72/951; H10W72/952

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 110 words
A method of forming an electrical bonding interconnect to a substrate comprising the following steps: providing an electrically conductive metal contact area on a substrate; exposing the metal contact area to conditions effective to reactively form an electrically resistive metal oxide material from the metal; applying an electrically conductive epoxy over the electrically resistive oxide material, the epoxy comprising a reducing agent effective to reduce the metal oxide back to conductive metal; reducing the metal oxide back to conductive metal using the reducing agent present in the conductive epoxy; and curing the conductive epoxy into a conductive hardened material to form a conductive interconnect between the epoxy and contact area.
Claim 2
Independent Claim 110 words
A method of forming an electrical bonding interconnect to a substrate comprising the following steps: providing an electrically conductive metal contact area on a substrate; exposing the metal contact area to conditions effective to reactively form an electrically resistive metal oxide material from the metal; applying an electrically conductive epoxy over the electrically resistive oxide material, the epoxy comprising a reducing agent effective to reduce the metal oxide back to conductive metal; reducing the metal oxide back to conductive metal using the reducing agent present in the conductive epoxy; and curing the conductive epoxy into a conductive hardened material to form a conductive interconnect between the epoxy and contact area.
Claim 3
Independent Claim 126 words
A method of forming an electrical bonding interconnect to a substrate comprising the following steps: providing an electrically conductive metal contact area on a substrate; exposing the metal contact area to conditions effective to reactively form an electrically resistive metal oxide material from the metal; applying an electrically conductive epoxy over the electrically resistive oxide material, the conductive epoxy comprising a resin component and a hardener component, the hardener component comprising a reducing agent effective to reduce the metal oxide back to conductive metal; reducing the metal oxide back to conductive metal using the reducing agent present in the hardener component of the conductive epoxy; and curing the conductive epoxy into a conductive hardened material to form a conductive interconnect between the epoxy and contact area.
Claim 4
Independent Claim 126 words
A method of forming an electrical bonding interconnect to a substrate comprising the following steps: providing an electrically conductive metal contact area on a substrate; exposing the metal contact area to conditions effective to reactively form an electrically resistive metal oxide material from the metal; applying an electrically conductive epoxy over the electrically resistive oxide material, the conductive epoxy comprising a resin component and a hardener component, the hardener component comprising a reducing agent effective to reduce the metal oxide back to conductive metal; reducing the metal oxide back to conductive metal using the reducing agent present in the hardener component of the conductive epoxy; and curing the conductive epoxy into a conductive hardened material to form a conductive interconnect between the epoxy and contact area.
Claim 5
Independent Claim 116 words
A method of forming an electrical bonding interconnect to a substrate comprising the following steps: providing a copper metal contact area on a substrate; exposing the copper contact area to conditions effective to reactively form an electrically resistive copper oxide from the copper; applying an electrically conductive epoxy over the electrically resistive oxide material, the epoxy comprising at least one of an alkoxylated polyalkyl amine or ethylene diamine; reducing the copper oxide back to conductive copper metal using the at least one of the alkoxylated polyalkyl amine or ethylene diamine present in the conductive epoxy; and curing the conductive epoxy into a conductive hardened material to form a conductive interconnect between the epoxy and contact area.
Claim 6
Independent Claim 116 words
A method of forming an electrical bonding interconnect to a substrate comprising the following steps: providing a copper metal contact area on a substrate; exposing the copper contact area to conditions effective to reactively form an electrically resistive copper oxide from the copper; applying an electrically conductive epoxy over the electrically resistive oxide material, the epoxy comprising at least one of an alkoxylated polyalkyl amine or ethylene diamine; reducing the copper oxide back to conductive copper metal using the at least one of the alkoxylated polyalkyl amine or ethylene diamine present in the conductive epoxy; and curing the conductive epoxy into a conductive hardened material to form a conductive interconnect between the epoxy and contact area.

References Cited (Backward Citations)

US3871015A Cited
US3871014A Cited
US4582724A Cited
JPS63276237A Cited
US5029585A Cited
US5196371A Cited
US5384284A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1999-01-01 1999-07-03 2000-01-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2003-01-01 2003-07-03 2004-01-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2007-01-01 2007-07-03 2008-01-02 $7700.00 Window Closed / Lapsed

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