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:
Dec. 24, 2002
Filed:
Aug. 03, 2000
Takashi Matsumoto, Hadano, JP;
Shinichi Kazui, Hadano, JP;
Masayuki Kawaharata, Yokohama, JP;
Madoka Tanouchi, Hadano, JP;
Masatake Muranaga, Hadano, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A plurality of green sheets are prepared, and at least one board pattern is formed on each of the sheets. The sheets are laminated and bonded with each other to form a multi-layer board. The unsintered multi-layer board is cut by irradiating the periphery of at least one board pattern on the surface of the multi-layer board with laser light. When the multi-layer board is cut, the width of the cut portion of the multi-layer board is measured. The cutting width is held constant by controlling the velocity at which the multi-layer board is cut, according to the measured width. Thus a section in the multi-layer board where at least one board pattern is formed is cut away from the other section of the multi-layer board. The cut away multi-layer board is then sintered. As a result, a multi-layer board is produced.