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:
May. 07, 1985
Filed:
Aug. 31, 1983
Jenq S Chang, Santa Clara County, CA (US);
Tung S Chang, Santa Clara County, CA (US);
Storage Technology Partners, Louisville, CO (US);
Abstract
A process for forming the openings (vias) in the glass layer of complementary metal oxide semiconductor (CMOS) integrated circuit chips is presented. The pattern of openings is applied to the glass layer using conventional resist/mask techniques. A plasma is used to remove the glass, and the silicon dioxide layer, if there is one, to expose a portion of the N+ and P+ circuit elements. Decreased conductivity of the crystalline lattice structure of the N+ material, caused by exposure to the plasma, appears as an added resistor between the N+ material and the metallization layer. The added resistance is reduced to acceptable levels before the metallization layer is applied by placing the chip in an inert gas atmosphere at an appropriate elevated temperature for an appropriate time.