Coating processes – Direct application of electrical – magnetic – wave – or... – Pretreatment of substrate or post-treatment of coated substrate
Patent
1990-12-03
1992-10-06
Padgett, Marianne
Coating processes
Direct application of electrical, magnetic, wave, or...
Pretreatment of substrate or post-treatment of coated substrate
427 96, 427 98, 427229, 427304, 427305, 427306, B05D 306, B05D 512, B05D 302, B05D 310
Patent
active
051530236
ABSTRACT:
A method of forming at least one electrically conductive path in a plastic substrate comprising providing a thermoplastic substrate having a melting point below 325.degree. C., coating said substrate with a precursor of a catalyst for the electroless deposition of conductive metals, said catalyst precursor having a decomposition temperature below the melting point of said thermoplastic and within the temperature range where said thermoplastic softens, heating the portion of said coated thermoplastic substrate corresponding to said conductive path to a temperature sufficient to decompose said catalyst precursor to said catalyst and soften said thermoplastic; said substrate, catalyst precursor and temperature being selected such that on heating to the temperature the precursor decomposes to the catalyst, the thermoplastic softens and at least partially melts without substantial decomposition to enable the catalyst to penetrate the surface of the thermoplastic and become anchored thereto to provide nucleation sites for the subsequent electroless deposition of conductive metal and depositing conductive metal by electroless deposition on said heated portion to form said conductive path.
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Bailey Raymond E.
Duff James
Ewing Joan R.
Orlowski Thomas E.
Swift Joseph A.
Padgett Marianne
Xerox Corporation
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