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Core Matrix Fabrication Process Utilizing a Liquid Polyester Resin

IP.com Disclosure Number: IPCOM000080882D
Original Publication Date: 1974-Feb-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 14K

Publishing Venue

IBM

Related People

Anschel, M: AUTHOR [+3]

Abstract

Matrices are useful in the facilitating of the positioning of cores to enable cores to be wired into core planes. In conventional methods for fabrication of matrices, many problems are encountered resulting from the utilizing of commercially available printing plate material such as TEMPLEX* and DYCRIL*.

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Core Matrix Fabrication Process Utilizing a Liquid Polyester Resin

Matrices are useful in the facilitating of the positioning of cores to enable cores to be wired into core planes. In conventional methods for fabrication of matrices, many problems are encountered resulting from the utilizing of commercially available printing plate material such as TEMPLEX* and DYCRIL*.

In the process described herein, there is utilized a photosensitive liquid polyester resin (LPR). The latter photo and/or thermally cured liquid resin may be developed by mechanical air-jet blowout or organic solvent washout techniques.

The advantages of LPR process over presently known processes are:
1. Little or no machinery is required with a minimum of

fabrication steps;

a) The liquid resin may be selectively applied where desired.

b) The liquid resin may be applied in the desired thickness

and shape, thereby minimizing

or eliminating entirely unnecessary machinery operation.
2. The physical and chemical properties of cured polyester resin

are superior to those of currently available materials such

as, for example, TEMPLEX and DYCRlL;

a) High-durometer readings (88D (LPR) vs. 82D).

b) LPR ia impervious to water, oil and most organic solvents

when cured. This facilitates subsequent cleaning

operations and machining.

c) LPR maintains dimension stability in the presence of a

high-moisture environment.
3. LPR makes it possible to attain smaller and deeper cavity

dimensions such as, for example, 0.003 x 0.014 x 0.010

deep and 0.0035 x 0.010 x 0.010 deep.

This is not attainable with other polymeric materials.
4. The LPR process is less expensive than prepared processes such

as TEMPLEX-DYCRlL.

Prior to describing the process utilizing a LPR, there is set forth the steps of the conventional DYCRIL-TEMPLEX process. The DYCRIL-TEMPLEX process comprises the following steps:
1. The unexposed DYCRIL is sawed to rough size.
2. The DYCRIL is held in a vacuum holder and exposed through a

mask to a carbon arc.
3. The exposed DYCRIL is developed in sodium hydroxide solution.
4. The top surface of the developed DYCRIL is ground flat.
5. Locating holes are jig-bored.
6. The DYCRIL is glued to an aluminum holding pl...