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Laser Enhanced Plating on Insulators

IP.com Disclosure Number: IPCOM000050749D
Original Publication Date: 1982-Dec-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Romankiw, LT: AUTHOR [+3]

Abstract

Gold exchange plating solutions, such as OROMERSE(Trademark of Technic, Inc. of Cranston, R I.) can be employed to plate directly onto insulating materials, such as ceramic and glass. This result is achieved by directing a high powered laser beam upon the surface to be coated. The laser is employed to heat the solution to its boiling point or above, only in locations where the solution contacts the surface of the insulator which is to be plated. In an experiment, we used a focussed continuous wave, 18-watt argon laser beam directed onto the surface of glass and alumina. As a result, we observed that a gold deposit was produced on the glass and alumina surfaces only in those regions where the laser was incident.

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Laser Enhanced Plating on Insulators

Gold exchange plating solutions, such as OROMERSE(Trademark of Technic, Inc. of Cranston, R I.) can be employed to plate directly onto insulating materials, such as ceramic and glass. This result is achieved by directing a high powered laser beam upon the surface to be coated. The laser is employed to heat the solution to its boiling point or above, only in locations where the solution contacts the surface of the insulator which is to be plated. In an experiment, we used a focussed continuous wave, 18-watt argon laser beam directed onto the surface of glass and alumina. As a result, we observed that a gold deposit was produced on the glass and alumina surfaces only in those regions where the laser was incident. Thus heavily complexed solutions, such as gold solutions, can be used to plate patterns on insulators without any additional processing or masking.

The pattern formed by the process is determined by the path traced by the laser beam on the surface to be plated. In general, for the effect to occur, the element is required to be complexed in a solution at room temperature and to be readily disproportionated into the elemental form with increased temperature. As a result of the use of this process, it is possible to omit the use of external electrodes, power supplies or catalysts.

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