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. 11, 1997
Filed:
Nov. 01, 1994
Jon A Casey, Poughkeepsie, NY (US);
Dinesh Gupta, Poughkeepsie, NY (US);
James R Wylder, Round Rock, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Method for producing ceramic laminates from a plurality of greensheet layers which include one or more thin greensheet layers, e.g. having a thickness less than about 3 mils, with interposed patterned circuit layers and conductive vias, while avoiding the loss of strength and the distortion encountered when paste compositions are pre-applied to such thin greensheet layers. The invention avoids the aforementioned problems by the use of a plurality of greensheet layers including thicker, paste-resistant greensheet layers having a thickness greater than the thin greensheet layer, e.g., between 5 and 10 mils, each pair of the thicker greensheet layers confining therebetween an unscreened thin greensheet layer, one of the thicker greensheet layers also being screened with the circuit pattern layer normally applied to the interposed thin greensheet layer. Thereafter the superposed layers are laminated and sintered to form the composite.