The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 22, 1987
Filed:
Oct. 27, 1986
Louis M Holleran, Elmira, NY (US);
Francis W Martin, Painted Post, NY (US);
Corning Glass Works, Corning, NY (US);
Abstract
This invention is directed to the production of glass-ceramic materials especially designed for substrates in integrated circuit packaging. The glass-ceramics can be prepared from thermally crystallizable glasses that can be sintered into an integral glass-ceramic having a dielectric constant less than 6 and containing willemite as the predominant crystal phase. The overall composition of the glass-ceramic consists essentially, in weight percent of 15-45% ZnO, 10-30% Al.sub.2 O.sub.3, and 30-55% SiO.sub.2. Where desired, a nucleating agent selected from the group consisting of 8-12% ZrO.sub.2 and 0.001-0.05% of a noble metal selected from the group consisting of Au, Pd, and Pt may be included.