Browse Prior Art Database

Use of Boric Acid Solution with Glass and Copper

IP.com Disclosure Number: IPCOM000078993D
Original Publication Date: 1973-Apr-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Best, B: AUTHOR [+2]

Abstract

Copper is laminated to glass or other inorganic substrate materials for forming circuit devices. The copper is first chrome plated on one surface and a boric acid solution is painted onto the chrome surface. A saturated solution of boric acid in methyl alcohol may be used. The solution is allowed to dry on the chrome surface and the copper is laminated to the glass by heat and pressure, with the surface painted with the boric acid solution facing the glass. The process provides superior adhesion of the copper to the glass.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

Use of Boric Acid Solution with Glass and Copper

Copper is laminated to glass or other inorganic substrate materials for forming circuit devices. The copper is first chrome plated on one surface and a boric acid solution is painted onto the chrome surface. A saturated solution of boric acid in methyl alcohol may be used. The solution is allowed to dry on the chrome surface and the copper is laminated to the glass by heat and pressure, with the surface painted with the boric acid solution facing the glass. The process provides superior adhesion of the copper to the glass.

In manufacturing some circuit devices, copper is also covered with glass. The glass may be applied to the copper as a frit and the structure is then heated to fuse the glass. This heating step often produces undesirable oxidation of the copper. To form a protective coating for the copper, a boric acid solution is first applied to the copper. The copper is fired at a temperature less than 100 degrees F. The glass can then be applied and fired conventionally without oxidizing the copper.

1