Browse Prior Art Database

Data Connector

IP.com Disclosure Number: IPCOM000039961D
Original Publication Date: 1987-Sep-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Pitts, OD: AUTHOR [+2]

Abstract

U.S. Patents 4,449,778 and 4,501,459 describe a data connector consisting of a plastic enclosure encasing a metal container. The metal container provides electromagnetic shielding for signals passing through the connector. This article provides an alternative shielding technique whereby the plastic enclosure is treated with an electroless deposit of copper over nickel and grounded to the stranded shield of a signal-carrying cable. The design provides acceptable shielding without the need for the metal container. Data connectors which are treated with the disclosed technique are able to transmit data at 16 megabits without violating shielding requirements of the Federal Communications Commission. An electroless plating of copper followed by nickel is deposited on the inside and outside walls of the plastic enclosure.

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Data Connector

U.S. Patents 4,449,778 and 4,501,459 describe a data connector consisting of a plastic enclosure encasing a metal container. The metal container provides electromagnetic shielding for signals passing through the connector. This article provides an alternative shielding technique whereby the plastic enclosure is treated with an electroless deposit of copper over nickel and grounded to the stranded shield of a signal-carrying cable. The design provides acceptable shielding without the need for the metal container. Data connectors which are treated with the disclosed technique are able to transmit data at 16 megabits without violating shielding requirements of the Federal Communications Commission. An electroless plating of copper followed by nickel is deposited on the inside and outside walls of the plastic enclosure. Preferably, the copper has a minimum thickness of 40 microinches, and the nickel has a minimum thickness of 10 microinches. The copper provides the necessary shielding, while the nickel provides both wear and corrosion-resistant properties. Several types of pretreatment processes are available for treating the polymer surface. Both wet and dry techniques have been used successfully in etching and roughening up the surface of the substrate material to improve chemical bonding and thus provide acceptable plating adhesion and reliability on various plastic materials utilized to manufacture the data connector. The figure shows a partial sch...