Flexible radio frequency identification tags

Patent metadata

Field	Value
Publication number	US-10977541-B2
Application number	US-201916593559-A
Country	US
Kind code	B2
Filing date	Oct 4, 2019
Priority date	Dec 23, 2014
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

Flexible, stretchable RFID tags are formed by a pocket that is formed from one or more substrates and layers of adhesive, and an electronic circuit that is located within this pocket. The RFID tags can include a stretchable substrate and an electronic circuit attached to the stretchable substrate by one or a finite number of discrete spaced apart attachment locations. When the pocket is formed by relatively thick adhesive layers adhering together one or more flexible substrates to form an internal cavity, the electronic circuit is located within this cavity and either is not adhered to any of the substrates of the cavity, and is free to move about within the cavity, or the electronic circuit can be attached to a substrate by a thin layer of adhesive.

First claim

What is claimed is:

1. A stretchable radio frequency identification tag comprising:
a flexible stretchable first substrate;
an adhesive layer disposed on a major surface of and substantially coextensive with the first substrate, the adhesive layer having a thicker border region and a thinner interior region; and
an electronic circuit disposed directly on the interior region of the adhesive layer,
wherein when the tag is applied to a surface of a base substrate, the electronic circuit directly contacts the surface of the base substrate, and the electronic circuit is either bonded to or is in electrical or thermal contact with the surface of the base substrate.

2. The tag of claim 1 , wherein the thinner interior region of the adhesive layer conforms to the major surface of the flexible stretchable first substrate regardless of a shape of the major surface of the flexible stretchable first substrate.

3. The tag of claim 1 , wherein the adhesive layer having a thicker border region and a thinner interior region comprises different adhesive materials in the thicker border region than the thinner interior region, or wherein the adhesive layer comprises a discontinuous layer.

Assignees

• 3M Innovative Properties Co

Inventors

• Gabriel Nicholas T
• Jesme Ronald D
• Bonifas Andrew P
• Cosgrove Dylan T
• Baetzold John P

Classifications

• G06K19/0723

  the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs · CPC title

• G06K19/025 Primary

  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) · CPC title

• G06K19/07728

  the record carrier comprising means for protection against impact or bending, e.g. protective shells or stress-absorbing layers around the integrated circuit · CPC title

• G06K19/07749

  the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card · CPC title

• G06K19/0772 Primary

  Physical layout of the record carrier · CPC title