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. 25, 2013
Filed:
Jan. 26, 2011
Makoto Okai, Tokorozawa, JP;
Motoyuki Hirooka, Kumagaya, JP;
Yasuo Wada, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A circuit board having a graphene circuit according to the present invention includes: a base substrate; a patterned aluminum oxide film formed on the base substrate, the patterned aluminum oxide film having an average composition of AlO(where x is 0 or more), the patterned aluminum oxide film having a recessed region whose surface has one or more cone-shaped recesses therein; a graphene film preferentially grown only on the patterned aluminum oxide film, the graphene film having one or more graphene atomic layers, the graphene film having a contact region that covers the recessed region, the graphene film growing parallel to a flat surface of the recessed region and parallel to an inner wall surface of each cone-shaped recess of the recessed region; and a patterned metal film, a part of the patterned metal film covering and having electrical contact with the contact region, the patterned metal film filling each recess covered by the graphene film.