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Uniformly Distributed Resistor Material and Fabrication

IP.com Disclosure Number: IPCOM000076495D
Original Publication Date: 1972-Mar-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Dhondy, N: AUTHOR [+3]

Abstract

Preparation of Conductive Polyethylene Resin Conductive polyethylene resin has been prepared by blending together 22.2 parts by eight of carboxylated polyethylene (Dow Chemical Company polyethylene SD449), 12.0 parts by weight of conductive carbon (VULCAN* XC-72R) and 5.55 parts by weight of polyisobutylene (VISTANEX** L-120) in a blender at a temperature of 290 Degrees F for approximately 15 minutes. The presence of carboxylated acid groups in polyethylene facilitates its connection to other components. Polyisobutylene improves the flexibility of the material.

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Uniformly Distributed Resistor Material and Fabrication

Preparation of Conductive Polyethylene Resin Conductive polyethylene resin has been prepared by blending together 22.2 parts by eight of carboxylated polyethylene (Dow Chemical Company polyethylene SD449), 12.0 parts by weight of conductive carbon (VULCAN* XC-72R) and 5.55 parts by weight of polyisobutylene (VISTANEX** L-120) in a blender at a temperature of 290 Degrees F for approximately 15 minutes. The presence of carboxylated acid groups in polyethylene facilitates its connection to other components. Polyisobutylene improves the flexibility of the material.

Fabrication of Uniformly Distributed Resistors

This polymer blend can be made into sheets by pressing between preheated platens of a hydraulic press at approximately 325 Degrees F. These sheets are suitable for any application requiring uniformly distributed resistance, as opposed to lumped discrete resistors. By controlling the thickness of the sheets, it is possible to obtain the desired dimensions and resistance. The samples had a surface resistance of the order of 100 to 400 ohms/square.

One of the applications of this material is as a uniformly distributed load for a strip line. A strip line has been constructed and terminated in a 50 ohm distributed resistance made up of this conductive polyethylene.

This material can be easily manufactured at a low cost; it is extremely pliable and easy to connect to other components; it has stable electrical p...