RFID tag including protection layers and having enhanced durability

• US 9,189,726 B2
• Filed: 04/25/2012
• Issued: 11/17/2015
• Est. Priority Date: 04/29/2011
• Status: Expired due to Fees

• Current Assignee: Intellectual Discovery Co., Ltd.
• Original Assignee: Intellectual Discovery Co., Ltd.
• Inventors: Kim, Yong-Jun, Nam, Won-Jun
• Primary Examiner(s): Mai, Thien T
• Assistant Examiner(s): LY, TOAN C
• Application Number:
  US13/455,352
• Publication Number:
  US 20120273577A1
• Time in Patent Office: 1,301 Days
• Field of Search: 235/488, 235/492, 340/572.1, 340/572.7
• US Class Current: 1/1
• CPC Class Codes: G06K 19/07722 the record carrier being multilayered, e.g. laminated sheets flat articles in general, see B32B37/00

Abstract

Provided is a radio frequency identification (RFID) tag including: a pattern layer which includes a first conductor having a pattern and an RFID chip electrically connected to the first conductor; an insulating layer which insulates the pattern layer from the radiation layer; a radiation layer which is attached to the insulating layer, and includes a second conductor having a radiation pattern inductively coupled to the first conductor; a lower protection layer disposed below a combination of the pattern layer, the insulating layer and the radiation layer; and an upper protection layer disposed above the combination of the pattern layer, the insulating layer and the radiation layer.

Claims

1. A radio frequency identification (RFID) tag comprising:

a pattern layer which comprises a first conductor, having a pattern, and an RFID chip electrically connected to the first conductor,

an insulating layer which insulates the pattern layer from a radiation layer;

the radiation layer which is attached to the insulating layer, and comprises a second conductor having a radiation pattern inductively coupled to the first conductor of which impedance is configured to match with impedance of the second conductor;

a lower protection layer which is disposed below and attached to a combination of the pattern layer, the insulating layer and the radiation layer, and comprises at least one first polyimide layer comprising polyimide and directly attached to a first silicon layer comprising silicon and attached to the combination of the pattern layer, the insulating layer and the radiation layer;

an upper protection layer which is disposed above the combination of the pattern layer, the insulating layer and the radiation layer, and comprises at least one second polyimide layer comprising polyimide and a second silicon layer comprising silicon;

a third silicon layer with water resistant property, which is attached to a lower surface of the first polyimide layer; and

a fourth silicon layer with water resistant property, which is attached to an upper surface of the second polyimide layer,

wherein the radio frequency identification (RFID) tag is attached to a member to be washed.

2. The RFID tag of claim 1, wherein the pattern layer comprises a printed circuit board on which the first conductor is formed.

3. The RFID tag of claim 1, wherein the lower protection layer and the upper protection layer are formed of a flexible material.

4. The RFID tag of claim 1, wherein the radiation layer comprises a printed circuit board on which the second conductor is formed.

5. The RFID tag of claim 1, wherein the insulating layer is formed of silicon.

6. The RFID tag of claim 1, wherein the first conductor induces a first signal generated in the pattern layer to the second conductor, and the second conductor induces a second signal, received from an outside, to the first conductor.

7. The RFID tag of claim 6, wherein the first conductor is a circuit which receives the first signal generated from the RFID in response to the second signal induced from the second conductor, and

wherein the first signal comprises information related to a product to which the RFID tag is attached.

8. The RFID of claim 1, wherein at least one of the first and second polyimide layers comprises plastic including aromatic diamine and aromatic tetracarbon acid dianhydride.