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. 21, 2012
Filed:
Feb. 20, 2009
Hideaki Yoshimura, Kawasaki, JP;
Kenji Iida, Kawasaki, JP;
Tomoyuki Abe, Kawasaki, JP;
Yasutomo Maehara, Kawasaki, JP;
Takashi Nakagawa, Kawasaki, JP;
Shin Hirano, Kawasaki, JP;
Hideaki Yoshimura, Kawasaki, JP;
Kenji Iida, Kawasaki, JP;
Tomoyuki Abe, Kawasaki, JP;
Yasutomo Maehara, Kawasaki, JP;
Takashi Nakagawa, Kawasaki, JP;
Shin Hirano, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
The core layer of a core substrate is made of carbon fibers impregnated with resin. When the temperature of the core layer increases, the core layer suffers from an increase in the thickness because of thermal expansion of the resin. The core layer is sandwiched between the insulating layers containing glass fibers. The insulating layers serve to suppress an increase in the thickness of the core layer resulting from the thermal expansion of the core layer. Thermal stress is suppressed in the core substrate.