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:
Mar. 05, 2002
Filed:
Dec. 15, 1999
David B. Goland, New Paltz, NY (US);
David C. Long, Wappinger Falls, NY (US);
John U. Knickerbocker, Hopewell Junction, NY (US);
Subhash L. Shinde, Cortland Manor, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for making small punches by employing multi-layer ceramic (MLC) technology includes the steps of preparing a sublaminate matrix of a high or low sintering temperature material, drilling holes in the sublaminate using a mask as a guide, filling the holes with punch material paste by a solupor process, laminating the sublaminate to a base plate or as a freestanding substrate, firing a laminate at an appropriate sintering temperature and removing the matrix material by a chemical or mechanical method. In accordance with the present invention, a large number of small punches are made in parallel to precise dimensions of two to ten mils in diameter and approximately 100 mils in length. This method allows that a punch plate array can also be used to simultaneously punch an array of vias in a greensheet and eliminates the additional step of loading individual punches into a punch plate, offering cost and time savings.