# US 7,746,234 B2 · RFID tag

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- Number: US 7,746,234 B2
- Document ID: US7746234B2
- Status: Granted
- Kind: B2
- Application number: 11/656,520
- Filed: 2007-01-23
- Published: 2008-02-21
- Granted: 2010-06-29
- Earliest claimed: 2006-08-09
- Assignees: Fujitsu Limited; Fujitsu Frontech Limited
- Inventors: Shunji Baba; Shigeru Hashimoto; Yoshiyasu Sugimura; Tsuyoshi Niwata
- Web page: https://patentgrep.com/patent/US7746234B2

## CPC

- G06K 19/07749: {the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card}
- G06K 19/077: Constructional details, e.g. mounting of circuits in the carrier
- G06K 19/07728: {the record carrier comprising means for protection against impact or bending, e.g. protective shells or stress-absorbing layers around the integrated circuit}
- H05K 1/0271: {Arrangements for reducing stress or warp in rigid printed circuit boards, e.g. caused by loads, vibrations or differences in thermal expansion}
- H05K 1/189: characterised by the use of flexible or folded printed circuits
- H05K 2201/09727: Varying width along a single conductor; Conductors or pads having different widths
- H05K 2201/2009: Reinforced areas, e.g. for a specific part of a flexible printed circuit
- G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS

## Abstract

The RFID tag includes a base that can bend and unbend; a communication antenna wired on the base; a circuit chip that is electrically connected to the antenna and performs radio communication via the antenna; a reinforcing member as a chip reinforcing member that covers at least the periphery of the circuit chip and a section of the antenna wiring, the covering preformed at least in an upper side with respect to the base designated as a bottom, and that has a concavo-convex shape and intersects with the antenna wiring at a concave section of the concavo-convex shape; and an adhesive that adheres the reinforcing member to the base, and in which an edge along a concave section of the edge of the reinforcing member traverses over the antenna.

## Claims

### Claim 1

An RFID tag, comprising:
a base that can bend and unbend;
a first antenna provided on the base;
a circuit chip that is electrically connected to the first antenna and configured to perform radio communication via the first antenna; and
a chip reinforcing member that covers at least a periphery of the circuit chip and a part of the first antenna, and having an edge including a concave section located between two convex sections in a plane parallel to the base,
wherein the concave section is disposed so as to intersect with the first antenna, and wherein, in use, the RFID tag is bendable along a bend line that meets the convex sections, such that a bending radius of a section of the base in the vicinity of the first antenna is greater than a bending radius of other sections of the base that meet the convex sections.

### Claim 2 (depends on 1)

The RFID tag according to claim 1, wherein:
the base having a first direction longer than a second direction, and the first antenna extends along the first direction, and the concave section of the chip reinforcing member traverses the first antenna diagonally with respect to the first direction.

### Claim 3 (depends on 1)

The RFID tag according to claim 1, further comprising a second antenna that is provided on the base, the second antenna having a larger width than that of the first antenna and is connected to the circuit chip and disposed so as to intersect with one of the convex sections.

### Claim 4 (depends on 1)

The RFID tag according to claim 1, wherein the chip reinforcing member covers a part of the first antenna and only a periphery of the circuit chip.

### Claim 5 (depends on 1)

The RFID tag according to claim 1, further comprising an underside reinforcing member disposed at a position sandwiching the base with respect to the chip reinforcing member.