Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1996-08-23
1999-02-02
Michl, Paul R.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
B32B 300
Patent
active
058662375
ABSTRACT:
A method of fabricating an electronic package having an organic substrate. The substrate is formed of fiberglass and epoxy. In order to additively circuitize the electronic package substrate, an organic polyelectrolyte is deposited onto the organic substrate. A colloidal palladium-tin seed layer is deposited atop the organic polyelectrolyte. This is followed by depositing a photoimagable polymer atop the seed layer, and photolithographically patterning the photoimagable polymer to uncover portions of the seed layer. The uncovered portions of the seed layer are catalytic to the electroless deposition of copper. In this way a conductive layer of copper is deposited atop the uncovered seed layer. The organic polyelectrolyte is deposited from an aqueous solution at the pH appropriate for the desired seed catalyst coating, depending on the ionizable character of the particular polyelectrolyte employed.
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J. Electrochem. Soc., vol. 140, No. 6 Jun. 1993 The Electrochomical Society Inc. pp. 1763 1768. Patterned Adhesion of Electrolessly Deposited Copper on Poly(Tetraflurethy).
Angelopoulos Anastasios Peter
Jones Gerald Walter
Malek Richard William
Marcello Heike
McKeveny Jeffrey
Goldman Richard M.
International Business Machines - Corporation
Michl Paul R.
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