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:
Oct. 07, 2003
Filed:
Feb. 07, 2001
Takashi Kobayashi, Tokyo, JP;
Seiji Oka, Tokyo, JP;
Kazuo Funahashi, Tokyo, JP;
Hideki Tsuruse, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention is provided to prevent a rise of temperature of a heating element and temperature of a board by inserting a graphite sheet having high thermal conductivity to a circuit print board without electrically connecting with a conductive hole In order to accomplish the above object, a manufacturing method of a circuit print board according the present invention has a thermal diffusive sheet forming step for forming the thermal diffusive sheet by bonding resin to a graphite sheet Next, the method has a through hole making step for making the through hole on the thermal diffusive sheet and an insulator bonding step for forming a core by thermally pressing the insulator to the thermal diffusive sheet having the through hole Through these steps, the graphite sheet can be inserted into the circuit print board without electrically connecting with the conductive hole