Browse Prior Art Database

Mask for Palladium Chelate Polymer Use in Circuits

IP.com Disclosure Number: IPCOM000090072D
Original Publication Date: 1969-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Saunders, TF: AUTHOR [+3]

Abstract

In this method for preparing printed circuitry, a substrate is coated with RISTON*. Such coating is masked, exposed to actinic radiation and developed. A Palladium chelate polymer, e.g., a mixture containing 1% to 80% solids of Pd/11/ polyethylenimine in water with 1 drop of TRITON** X-100 per 200 to 500 ml of solution is deposited in the exposed areas of the RISTON coating. The excess chelate polymer is doctored off the surface of the RISTON coating and the substrate is dried at about 110 degrees C. On heating the substrate at temperatures of from about 225 degrees C to 250 degrees C, the RISTON coating and the chelate polymer are decomposed leaving a palladium metal pattern on the substrate.

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Mask for Palladium Chelate Polymer Use in Circuits

In this method for preparing printed circuitry, a substrate is coated with RISTON*. Such coating is masked, exposed to actinic radiation and developed. A Palladium chelate polymer, e.g., a mixture containing 1% to 80% solids of Pd/11/ polyethylenimine in water with 1 drop of TRITON** X-100 per 200 to 500 ml of solution is deposited in the exposed areas of the RISTON coating. The excess chelate polymer is doctored off the surface of the RISTON coating and the substrate is dried at about 110 degrees C. On heating the substrate at temperatures of from about 225 degrees C to 250 degrees C, the RISTON coating and the chelate polymer are decomposed leaving a palladium metal pattern on the substrate. The decomposed matter is rinsed away and the substrate and its metallic pattern is subjected to either electroless or electrolytic deposition or both of a conducting metal. The latter is deposited according to the pattern outlined by the above-deposited metallic palladium. * Trademark of E. I. du Pont de Nemours and Co. ** Trademark of Rohn and Haas Co.

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