Browse Prior Art Database

Chemically Applying Gold to Nonconductive Bodies and Glass Substrates

IP.com Disclosure Number: IPCOM000091169D
Original Publication Date: 1969-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Albeck, P: AUTHOR [+4]

Abstract

The method utilizes an electroless gold-plating solution which can be applied to glass using available sensitization and activation processes. The plating solution has the following composition:. Gold-Hydrochloric Acid 4 gms/liter Urea 8 gms/liter Citric Acid 10 gms/liter.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Chemically Applying Gold to Nonconductive Bodies and Glass Substrates

The method utilizes an electroless gold-plating solution which can be applied to glass using available sensitization and activation processes. The plating solution has the following composition:. Gold-Hydrochloric Acid 4 gms/liter

Urea 8 gms/liter

Citric Acid 10 gms/liter.

Prior to gold-plating the substrate, which can be glass, a glass encapsulated semiconductor device, ceramic module, or the like, is photoresist coated, exposed, and subsequently sensitized and activated in the areas in which the conducting patterns are to be arranged. Following the sensitization process, the photoresist can be retained or removed as required. The sensitized substrate is then immersed in the plating bath. The apparatus for this method has tank 1 serving to accommodate the bath, piping system 2 connected to bath exit 3, and cooling device 4 connected to pump 5 for circulating the bath at least twice per hour. The output of pump 5 is linked with filter 6, the permeability of which has to be 1-5 microns. The filtered bath is subsequently heated by heater 7 to a temperature required for gold-plating, about 75 - 85 degrees C.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]