(12) United States Patent ao) Patent No.: Us 7,540,428 B2
Baba et al. (45) Date of Patent: Jun. 2,2009
(54) RFID TAG, RFID-TAG ANTENNA, RFID-TAG
ANTENNA SHEET, AND METHOD OF
MANUFACTURING RFID TAG
(75) Inventors: Shunji Baba, Kawasaki (JP); Naoki
Ishikawa, Kawasaki (JP); Hiroshi
Kobayashi, Kawasaki (JP); Takatoyo
Yamakami, Kawasaki (JP); Masumi
Katayama, Kawasaki (JP)
(73) Assignee: Fujitsu Limited, Kawasaki (JP)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 368 days.
(21) Appl.No.: 10/998,138
(22) Filed: Nov. 29, 2004
(65) Prior Publication Data
US 2006/0043199 Al Mar. 2, 2006
(30) Foreign Application Priority Data
Aug. 31,2004 (JP) 2004-253458
(51) Int. CI.
(52) U.S. CI 235/492; 235/451
(58) Field of Classification Search 235/492,
235/451; 340/572.01, 572.04, 10.1 See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
A radio-frequency-identification tag antenna includes a film base, a plurality of antenna patterns for transmission and reception, which is formed in parallel on the film base, and a cut line that is formed on the film base between adjacent antenna patterns along the antenna patterns from an inside to an outer edge of the film base. A part of the film base on which the antenna patterns are formed is folded or bent in a predetermined direction using the cut line.
11 Claims, 18 Drawing Sheets