IP Library Granted Patent US 11,244,220
Granted Patent B2
US 11,244,220 · App. 16/760,992 · Granted Feb 8, 2022

Method for manufacturing an RFID tag and an RFID tag comprising an IC and an antenna

Inventors: Lauri Huhtasalo (Tampere, FI); Eerik Halonen (Tampere, FI); Juha Ikonen (Nokia, FI)
Assignee: Digital Tags Finland, OY
G06K19/0775G06K19/0723G06K19/07745G06K19/07775
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Quick Facts
Patent No.
US 11,244,220
App. No.
16/760,992
Granted
Feb 8, 2022
Kind
B2
Abstract

Method for manufacturing an RFID tag comprising an IC and an antenna. The method comprising the steps of providing an antenna made of a soldering material, which antenna is at least partly covered with a hot melt adhesive in solid form; heating the antenna to a temperature above its melting point, wherein the heated parts of the antenna and the hot melt adhesive melt, placing an IC in a predetermined position which position is suitable for the IC to connect to the antenna; pressing the IC and antenna together, such that, an electrical connection between the IC and the antenna is established; and cooling RFID tag, such that the hot melt adhesive and the antenna solidify, wherein a soldered joint between the IC and the antenna is achieved and the hot melt adhesive surrounds the joint between the IC and the antenna.

Claims (23)

1. A method for manufacturing an RFID tag comprising an integrated circuit (IC) and an antenna, the method comprising the steps of:

providing an antenna made of a soldering material,

wherein the antenna is at least partly covered with a hot melt adhesive in solid form,

heating the antenna to a temperature above a melting point of the antenna, wherein heated parts of the antenna and the hot melt adhesive melt,

placing an IC in a predetermined position suitable for the IC to connect to the antenna,

pressing the IC and antenna together, such that, an electrical connection between the IC and the antenna is established, and

cooling such that the hot melt adhesive and the antenna solidify forming an RFID tag, wherein a soldered joint between the IC and the antenna is achieved and the hot melt adhesive surrounds the joint between the IC and the antenna.

2. The method according to claim 1 , wherein the step of heating is performed before the step of placing the IC.

3. The method according to claim 1 , wherein the step of placing of the IC is performed before the step of heating.

4. The method according to claim 1 , wherein the step of placing of the IC is performed at the same time as the step of heating.

5. The method according to claim 1 , wherein a side of the IC that facing the antenna is covered with a hot melt adhesive in solid form.

6. The method according to claim 1 , wherein the antenna comprises tin-bismuth.

7. The method according to claim 1 , wherein the hot melt adhesive comprises a polyolefin hot melt adhesive or an ethylene-vinyl acetate hot melt adhesive.

8. The method according to claim 3 , wherein a side of the IC that facing the antenna is covered with a hot melt adhesive in solid form.

9. The method according to claim 4 , wherein a side of the IC that facing the antenna is covered with a hot melt adhesive in solid form.

10. A method for manufacturing an RFID tag comprising an integrated circuit (IC) and an antenna, the method comprising the steps of:

providing an antenna made of a soldering material,

placing an IC in a predetermined position suitable for the IC to connect to the antenna, wherein a side of the IC that facing the antenna is covered with a hot melt adhesive in solid form,

heating the antenna to a temperature above a melting point of the antenna, wherein heated parts of the antenna and the hot melt adhesive melt,

pressing the IC and antenna together, such that, an electrical connection between the IC and the antenna is established, and

cooling such that the hot melt adhesive and the antenna solidify forming an RFID tag, wherein a soldered joint between the IC and the antenna is achieved and the hot melt adhesive surrounds the joint between the IC and the antenna.

11. The method according to claim 10 , wherein the antenna comprises tin-bismuth.

12. The method according to claim 10 , wherein the hot melt adhesive comprises a polyolefin hot melt adhesive or an ethylene-vinyl acetate hot melt adhesive.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 6, 2021
From: STORA ENSO OYJ
To: DIGITAL TAGS FINLAND, OY
Reel/Frame 057714/0638 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 1, 2020
From: HUHTASALO, LAURI; HALONEN, EERIK; IKONEN, JUHA
To: STORA ENSO OYJ
Reel/Frame 052548/0031 →
Priority Claims (1)
SE 1751364-9 · Nov 3, 2017 · national
Continuity (1)
Related Publication 20200311508A1 · Oct 1, 2020