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Laser Enhanced Modulation Techniques for Special Pattern Generation on Bulk Metallic Samples

IP.com Disclosure Number: IPCOM000050748D
Original Publication Date: 1982-Dec-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Romankiw, LT: AUTHOR [+3]

Abstract

This method provides for generation of local plating patterns by controlling the laser pulse width and intensity. This control enables heavy plating to occur on more than one surface of a sample simultaneously without movement of the part or laser. It also permits simultaneous coating of the sample with a thin layer of the same plating material to avoid corrosion.

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Laser Enhanced Modulation Techniques for Special Pattern Generation on Bulk Metallic Samples

This method provides for generation of local plating patterns by controlling the laser pulse width and intensity. This control enables heavy plating to occur on more than one surface of a sample simultaneously without movement of the part or laser. It also permits simultaneous coating of the sample with a thin layer of the same plating material to avoid corrosion.

Up to now, all plating using the laser to provide local enhancement for pattern generation on metallic bulk samples has been observed on the surface receiving the laser radiation. We have found that by controlling the laser pulse width and amplitude we can obtain simultaneous plating on both the front and back surface of a metal foil. This has been observed in the case of laser-enhanced "immersion" plating of gold on copper using a Nd/YAG laser with OROMERSE(Trademark of Technic, Inc. of Cranston, R. I.) gold immers ion plating solution. We have also demonstrated, in addition to the thick local plating, the ability to coat the remainder of the sample with a thin layer of gold, thus creating a completely gold-coated corrosion-free surface.

The process is adapted for laser-enhanced immersion plating and electroless (autocatalytic) plating conditions as well as electoplating techniques using the laser to obtain local enhancements. The general approach is applicable to a number of other metals than gold or copper. I...