Browse Prior Art Database

Water Soluble Screenable Material

IP.com Disclosure Number: IPCOM000081301D
Original Publication Date: 1974-May-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Bower, JE: AUTHOR [+5]

Abstract

Material having the following general composition can be applied by conventional silk-screening equipment, serves as a mask permitting selective deposition of solder, and is removable by water in conventional rinsing equipment after use: Parts by Weight Range Preferred Aged gum arabic (acacia gum) 40-60 55 DI water 60-40 45 Ethylene glycol 5-15 10.

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Water Soluble Screenable Material

Material having the following general composition can be applied by conventional silk-screening equipment, serves as a mask permitting selective deposition of solder, and is removable by water in conventional rinsing equipment after use: Parts by Weight

Range Preferred

Aged gum arabic (acacia gum) 40-60 55

DI water 60-40 45

Ethylene glycol 5-15 10.

The gum arabic is artificially aged in a hot air circulating oven for one week at 75 degrees C, with periodic agitation to enhance drying.

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