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:
Feb. 22, 1977
Filed:
Mar. 11, 1974
Karl Niedermeier, Aich, DT;
Manfred Wintzer, Unterpfaffenhofen, DT;
Siemens Aktiengesellschaft, Berlin & Munich, DT;
Abstract
A process for the production of ceramic substrates for thin layer circuits utilizes a cast compound which may be transformed into a ceramic body by sintering. The compound is poured out in the form of a coating on a base, for drying whereupon a leather-like, tough, 'green' substrate layer is formed from which the required shapes can be punched out and sintered. In the green, air-drying state, the substrates are exposed to a pressure of up to approximately 1000 kp/cm.sup.2 between highly polished, plane parallel surfaces constituted by mirror finished surfaces of compression rams which may advantageously include highly polished surfaces of synthetic material.