Printed RFID sensor tag

• US 10,318,857 B1
• Filed: 11/30/2017
• Issued: 06/11/2019
• Est. Priority Date: 11/30/2017
• Status: Active Grant

• Current Assignee: BGT Materials Limited
• Original Assignee: BGT Materials Limited
• Inventors: Lai, Chung-Ping, Chang, Kuo-Hsin
• Primary Examiner(s): Lau, Hoi C
• Application Number:
  US15/827,751
• Publication Number:
  US 20190164030A1
• Time in Patent Office: 558 Days
• CPC Class Codes: G06K 19/0717 the sensor being capable of sensing environmental conditions such as temperature history or pressure
• CPC Class Codes: G06K 19/0776 the adhering arrangement being a layer of adhesive, so that the record carrier can function as a sticker
• CPC Class Codes: G06K 19/07773 Antenna details antennas for wireless devices, e.g. RFID tags, in general H01Q1/22
• CPC Class Codes: G06K 19/07775 the antenna being on-chip
• CPC Class Codes: G06K 19/07786 the antenna being of the HF type, such as a dipole
• CPC Class Codes: H01Q 1/2208 associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems methods or arrangements for sensing record carriers, e.g. for reading patterns G06K7/00; record carrier for use with machines and with at least a part designed to carry digital markings G06K19/00
• CPC Class Codes: H01Q 1/2225 used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
• CPC Class Codes: H01Q 9/065 Microstrip dipole antennas patch antenna H01Q9/0407
• CPC Class Codes: H04Q 2209/47 using RFID associated with sensors
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
• CPC Class Codes: H05K 1/092 Dispersed materials, e.g. conductive pastes or inks
• CPC Class Codes: H05K 1/16 incorporating printed electric components, e.g. printed resistor, capacitor, inductor
• CPC Class Codes: H05K 2201/10098 Components for radio transmission, e.g. radio frequency identification [RFID] tag, printed or non-printed antennas
• CPC Class Codes: H05K 3/12 using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns

Abstract

A printed RFID sensor tag contains: a substrate, a RFID sensor arranged on a top of the substrate, and a protective layer covering the RFID sensor. The RFID sensor includes a RFID sensing antenna and a chip adhered on the RFID sensing antenna. The RFID sensing antenna is partially or totally made of conductive sensing ink/glue printed on the top of the substrate, and the conductive sensing ink/glue consists of conductive ink/glue and multiple sensing materials.

Claims

1. A printed RFID sensor tag comprising:

a substrate, a RFID sensor arranged on a top of the substrate, and a protective layer covering the RFID sensor;

the RFID sensor including a RFID sensing antenna and a chip adhered on the RFID sensing antenna, wherein the RFID sensing antenna is partially or totally made of conductive sensing ink/glue printed on the top of the substrate, and the conductive sensing ink/glue consists of conductive ink/glue and multiple sensing materials;

wherein the RFID sensing antenna includes a first part, a second part, and a sensing part, wherein a first distal segment of the first part separates from a second distal segment of the second part so as to produce an open circuit between the first distal segment of the first part and the second distal segment of the second part, wherein a chip adheres on a connection portion of the first part and the second part, the sensing part is coupled with the first segment of the first part and the second segment of the second part;

the first part and the second part are made of conductive ink/glue, and the sensing part are made of conductive sensing ink/glue, wherein the sensing part is a normal open circuit and changes to a closed circuit after being influenced by multiple sensed targets.

2. The printed RFID sensor tag as claimed in claim 1, wherein the multiple sensing materials are oxides-based semiconductor materials or other-based semiconductor materials.

3. The printed RFID sensor tag as claimed in claim 1, wherein the multiple sensing materials are any one of chemically sensitive materials, photosensitive materials, thermal-sensitive materials, force-sensitive materials, and magnetic-sensitive materials.

4. The printed RFID sensor tag as claimed in claim 1, wherein a conductor of the conductive sensing ink/glue is any one of metal, carbon, conductive polymers, and mixture of the metal, the carbon, and the conductive polymers.

5. The printed RFID sensor tag as claimed in claim 1, wherein the protective layer totally, partially covers or does not cover the RFID sensing antenna.

6. The printed RFID sensor tag as claimed in claim 1, wherein the RFID sensing antenna includes a main part and a frequency modulation part, the main part is electrically connected with the frequency modulation part and is made of conductive ink/glue, and the frequency modulation part is made of conductive sensing ink/glue.

7. The printed RFID sensor tag as claimed in claim 6, wherein multiple sensing materials of the conductive sensing ink/glue of the frequency modulation part are any one of oxides-based semiconductor materials or other-based semiconductor materials.

8. The printed RFID sensor tag as claimed in claim 6, wherein multiple sensing materials of the conductive sensing ink/glue of the frequency modulation part are any one of metal, carbon, polymer, organic modifiers, and mixture of the metal, the carbon, the polymer, and the organic modifiers.

9. The printed RFID sensor tag as claimed in claim 1, wherein multiple sensing materials of the conductive sensing ink/glue of the sensing part are oxides-based semiconductor materials or other-based semiconductor materials.

10. The printed RFID sensor tag as claimed in claim 1, wherein multiple sensing materials of the conductive sensing ink/glue of the sensing part are any one of metal, carbon, polymer, organic modifiers, and mixture of the metal, the carbon, the polymer, and the organic modifiers.