# US 2025/0378291 A1 · Rfid tag

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- Number: US 2025/0378291 A1
- Document ID: US20250378291A1
- Status: Published application
- Kind: A1
- Application number: 19/300,316
- Filed: 2025-08-14
- Published: 2025-12-11
- Earliest claimed: 2023-03-17
- Assignees: Fujitsu Frontech Limited
- Applicants: Fujitsu Frontech Limited
- Inventors: Takuma YOSHIDA
- Web page: https://patentgrep.com/patent/US20250378291A1

## CPC

- G06K 19/025: {the material being flexible or adapted for folding, e.g. paper or paper-like materials used in luggage labels, identification tags, forms or identification documents carrying RFIDs (methods for testing the genuineness of valuable papers, e.g. banknotes or passports G07D7/00; constructional features of booklets and the like B42D)}
- G06K 19/027: {the material being suitable for use as a textile, e.g. woven-based RFID-like labels designed for attachment to laundry items (markings attached to laundry items in general D06F93/00)}
- 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}
- 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: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS

## Abstract

An RFID tag includes an inlay and a tube member having elasticity and having the inlay housed therein from one end portion to another end portion in a longitudinal direction of the inlay, the inlay having a long shape and having: a semiconductor element; a substrate with an antenna pattern formed to be connected to the semiconductor element; and a protective member to protect both surfaces of the substrate in a thickness direction. The inlay has a size formed to be smaller than an inner diameter of the tube member, the size being in a lateral direction of the inlay, and has an engagement portion formed at the other end portion of the inlay in the longitudinal direction, the engagement portion having been extended in the lateral direction of the inlay and engaging with an inner surface of the tube member.

## Claims

### Claim 1

An RFID tag, comprising:
an inlay that has a long shape and has: a semiconductor element; a substrate with an antenna pattern, which is formed to be connected to the semiconductor element; and a protective member, which protects both surfaces of the substrate in a thickness direction; and
a tube member having elasticity and having the inlay housed therein from one end portion to another end portion of the inlay in a longitudinal direction, wherein
the inlay has a size formed to be smaller than an inner diameter of the tube member, the size being in a lateral direction of the inlay, and has an engagement portion, which is formed at the other end portion of the inlay in the longitudinal direction, the engagement portion having been extended in the lateral direction of the inlay and engaging with an inner surface of the tube member.

### Claim 2 (depends on 1)

The RFID tag according to claim 1, wherein
the engagement portion has an inclined surface, which is formed to be inclined with respect to the longitudinal direction of the inlay, the inclined surface being at an end of the engagement portion, the end being near the one end portion, and
the inclined surface is inclined to form an obtuse angle to an outer peripheral surface of the engagement portion, the outer peripheral surface extending along the inner surface of the tube member.

### Claim 3 (depends on 2)

The RFID tag according to claim 2, wherein
the engagement portion has a corner portion, which is formed at an opposite end of the engagement portion, the opposite end being opposite to the end near the one end portion, and
the corner portion is formed of: the outer peripheral surface, which extends along the longitudinal direction of the inlay; and an end surface, which extends along the lateral direction of the inlay.

### Claim 4 (depends on 1)

The RFID tag according to claim 1, wherein the tube member has a cross sectional shape that is formed in a flattened shape flattened in a thickness direction of the inlay.

### Claim 5 (depends on 3)

The RFID tag according to claim 3, wherein
the inlay has one end surface at the one end portion and another end surface at the other end portion, the one end surface and the other end surface being positioned inside the tube member, and
a first distance is larger than a second distance in a tube axis direction of the tube member, the first distance being from the one end surface of the inlay to one end surface of the tube member, the one end surface positioned near the one end portion, the second distance being from the other end surface of the inlay to another end surface of the tube member, the other end surface being positioned near the other end portion.

### Claim 6 (depends on 1)

The RFID tag according to claim 1, wherein the engagement portion is formed on both sides of the inlay in the lateral direction.

### Claim 7 (depends on 1)

The RFID tag according to claim 1, further comprising:
a bag formed of nonwoven fabric or cloth and having the tube member housed therein, wherein
the bag is formed to surround the entirety of the tube member.