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US5679444A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for producing multi-layer circuit board and resulting article of manufacture

Assignee: International Business Machines Corp
•
Filing: 1996-07-15
•
Granted: 1997-10-21
•
Expires: 2016-07-15
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Abstract

Abstract A method for producing a panel of a multi-layer electronic circuit package and resulting article of manufacture is provided comprising the steps of coating a circuitized core material that has been cut into panels with a dielectric material and copper cover sheets; forming circuits from the cover sheets by etching; applying an adhesive polymer across the dielectric material covering the entire area of the panel; applying a cover sheet; drilling the panel to form through-holes and vias; seeding and plating the through-holes and vias with joining metal; applying photo-resist to the panels exposed with an image of the area of the panel to be joined and developed; and etching the cover sheet and the photo-resist away in the area of the panel to be joined to expose the adhesive polymer.

Inventors

  • 👤 Charles Robert Davis
  • 👤 Thomas P. Gall

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 06:20
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/44; H05K3/445; H05K3/38; H05K3/386; H05K3/46; H05K3/4611; H05K3/4623; H05K3/4641; H05K1/00; H05K1/02; H05K1/03; H05K1/05; H05K1/056; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/015; H05K2201/0183; H05K2201/0195; H05K2201/02; H05K2201/0203; H05K2201/0206; H05K2201/0209; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0355; H05K2201/06; H05K2201/068; H05K3/0011; H05K3/0017; H05K3/002; H05K3/30; H05K3/303; H05K3/305; H05K3/40; H05K3/42; H05K3/425; H05K3/427; H05K3/429; H05K3/4626; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249984; Y10T428/249986; Y10T428/28; Y10T428/2804; Y10T428/31504; Y10T428/3154

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 59 words
An electronic circuit package having: a core material; a dielectric coating on both sides of the core material; an adhesive polymer coated over both sides of the core material covering the entire area of the package; and a cover sheet on both sides of the package selectively etched away to reveal the adhesive polymer in areas to be joined.
Claim 2
Dependent Claim 59 words
An electronic circuit package having: a core material; a dielectric coating on both sides of the core material; an adhesive polymer coated over both sides of the core material covering the entire area of the package; and a cover sheet on both sides of the package selectively etched away to reveal the adhesive polymer in areas to be joined.
Claim 3
Dependent Claim 14 words
The electronic circuit package of claim 1, wherein the adhesive polymer is poly(tetrafluoroethylene-perfluorovinyl ether).
Claim 4
Dependent Claim 17 words
The electronic circuit package of claim 1, wherein the dielectric coating is a silica filled poly(tetrafluoroethylene) composite.
Claim 5
Dependent Claim 15 words
The electronic circuit package of claim 1, wherein the coversheet is of a copper material.
Claim 6
Dependent Claim 13 words
The electronic circuit package of claim 1, wherein the core material is copper-Invar-copper.

References Cited (Backward Citations)

US5230937A Cited
US4640866A Cited
US4781969A Cited
JPS63145341A Cited
US4886699A Cited
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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) 2000-10-20 2001-04-21 2001-10-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2004-10-20 2005-04-21 2005-10-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2008-10-20 2009-04-21 2009-10-21 $7700.00 Window Closed / Lapsed

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