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:
Mar. 13, 2007
Filed:
Mar. 10, 2005
Naoya Kanda, Fujisawa, JP;
Madoka Minagawa, Yokohama, JP;
Kosuke Inoue, Fujisawa, JP;
Hiroshi Homma, Yokohama, JP;
Naoya Kanda, Fujisawa, JP;
Madoka Minagawa, Yokohama, JP;
Kosuke Inoue, Fujisawa, JP;
Hiroshi Homma, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
When an RFID-tag is formed by joining a semiconductor chip (RFID chip) to an antenna consisting of a rolled metal foil or the like using ultrasonic waves, the pressure impressed to the semiconductor chip is suppressed to avoid the damage of the semiconductor chip. For this purpose, the present invention provides an RFID-tagwherein gold bumps are joined to the metal foil by pressing the gold bumps formed on the semiconductor chip against an antenna member, and impressing ultrasonic waves; and the RFID-tag wherein a matte surface having a low glossiness is formed on the metal foil, or a surface having shallow rolling streaks is formed on the metal foil, and gold bumps are joined to the surface.