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Printed Circuit Board of Composite Plastic with Platable Constituent Dispersed as Islands in Bulk Material

IP.com Disclosure Number: IPCOM000049913D
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Aakalu, NG: AUTHOR [+2]

Abstract

A printed circuit board is made of polyphenylene sulphide (PPS) and polyether sulfone or polysulfone. PFS forms the bulk of the material and gives the circuit board good mechanical properties, and the polyether sulfone or polysulfone makes the board platable with copper. The polyether sulfone or polysulfone disperses into the bulk material as small islands. Each island acts as a key that secures copper to the surface of the island.

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Printed Circuit Board of Composite Plastic with Platable Constituent Dispersed as Islands in Bulk Material

A printed circuit board is made of polyphenylene sulphide (PPS) and polyether sulfone or polysulfone. PFS forms the bulk of the material and gives the circuit board good mechanical properties, and the polyether sulfone or polysulfone makes the board platable with copper. The polyether sulfone or polysulfone disperses into the bulk material as small islands. Each island acts as a key that secures copper to the surface of the island.

PPS has good mechanical properties for a printed circuit board including an ability to withstand the temperatures of wave soldering. However, it is not platable. Some plastics are platable because they have an electric dipole structure, for example, polyether sulfone and polysulfone.

It has been found that when polyether sulfone or polysulfone between 10 and 75 weight percent is thoroughly mixed with PPS, the resulting material has the platable material in the form of small dispersed islands. When a circuit board of this material is copper plated, the copper has a desirably high peel strength of about 10 pounds per inch.

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