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:
Jun. 04, 1996
Filed:
May. 31, 1994
Robert H Anders, Jr, Owego, NY (US);
William Cobbett, Jr, New Paltz, NY (US);
William T Grant, Pleasant Valley, NY (US);
Mark W Kapfhammer, Fishkill, NY (US);
Nabil A Rizk, Cary, NC (US);
Nirmal S Sandhu, Hopewell Junction, NY (US);
Mohamad A Sarfaraz, Poughkeepsie, NY (US);
You-Wen Yau, Hsin-Chu, TW;
International Business Machines Corporation, Armonk, NY (US);
Abstract
Method for thermally-machining large area features, and screen-depositing metallurgy on a ceramic dielectric greensheet. The method comprises an improvement over the conventional integrated disposable mask process, and involves the steps of outlining the large feature areas through a masking film laminated to a greensheet, using a high intensity energy beam such as a laser beam, electron beam, photon beam, etc, forming a stencil sheet having corresponding large area feature openings, and laminating the stencil sheet in registration over the masking film. An adhesive sheet is pressed against the back of the stencil sheet, through the stencil openings, to adhere to the outline features on the masking film and to remove them when the stencil sheet is separated from the masking film. Conductive paste is applied to the greensheet, through the large feature openings in the masking film, and the electroded greensheet is fired for use in preparing multi-layer ceramic packages.