Wireless IC device and component for wireless IC device

• US 8,662,403 B2
• Filed: 03/22/2013
• Issued: 03/04/2014
• Est. Priority Date: 07/04/2007
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Kato, Noboru, Ikemoto, Nobuo
• Primary Examiner(s): LEE, SEUNG H
• Application Number:
  US13/848,748
• Publication Number:
  US 20130214049A1
• Time in Patent Office: 347 Days
• Field of Search: 235/383, 235/385, 235/439, 235/492, 235/493
• US Class Current: 235/492
• CPC Class Codes: 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
• CPC Class Codes: G06K 19/07756 the connection being non-galvanic, e.g. capacitive
• CPC Class Codes: G06K 19/07758 arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
• CPC Class Codes: G06K 19/07771 the record carrier comprising means for minimising adverse effects on the data communication capability of the record carrier, e.g. minimising Eddy currents induced in a proximate metal or otherwise electromagnetically interfering object
• CPC Class Codes: H01L 2224/16225 the item being non-metallic, e.g. insulating substrate with or without metallisation
• CPC Class Codes: H01L 2924/19105 in a side-by-side arrangement on a common die mounting substrate
• 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 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H04B 5/22 Capacitive coupling

Abstract

A wireless IC device includes a cutout portion having no aluminum-deposited film that is provided at an end of an article package made of an aluminum-deposited laminated film, and an electromagnetic coupling module is provided at the cutout portion. The electromagnetic coupling module and the aluminum-deposited film of the package define a wireless IC device. A loop electrode, which is a magnetic field transmission auxiliary radiator of the electromagnetic coupling module, is coupled to the aluminum-deposited film of the package. Thus, the article package functions as a radiator of an antenna.

Claims

1. An article comprising:

a conductive member having a substantially planar shape and defined by a portion of the article;

a high-frequency device including a wireless IC chip;

a loop electrode connected to the wireless IC chip;

wherein

the loop electrode is located adjacent to an edge portion of the conductive member and coupled to the conductive member; and

the conductive member defines a radiation electrode.

2. The article according to claim 1, wherein the conductive member includes a plate-shaped or sheet-shaped member that includes a metal layer or a metal plate.

3. The article according to claim 1, wherein the loop electrode is provided on an insulative sheet and attached to the edge portion of the conductive member.

4. The article according to claim 1, wherein the loop electrode defines a resonant circuit provided in the article.

5. The article according to claim 4, wherein a resonant frequency of the resonant circuit corresponds to a frequency of a signal that is transmitted or received by the radiation electrode.