BASE SHEET

• US 20110063184A1
• Filed: 12/14/2007
• Published: 03/17/2011
• Est. Priority Date: 12/28/2006
• Status: Active Grant

• Current Assignee: Philtech Inc.
• Original Assignee: Philtech Inc.
• Inventors: Mishima, Katsuhiko, Fujino, Katsuhiro, Nishihara, Shinji, Mura, Naomi, Furumura, Yuji, Kamihashi, Susumu
• Granted Patent: US 8,237,622 B2
• Time in Patent Office: Days
• US Class Current: 343/856
• 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 19/07779 the inductive antenna being a coil
• CPC Class Codes: G06K 19/07783 the coil being planar
• 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 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 21/29 Combinations of different interacting antenna units for giving a desired directional characteristic H01Q25/00 takes precedence
• 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: H01Q 9/16 with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole H01Q9/44 takes precedence
• CPC Class Codes: H04B 5/00 Near-field transmission systems, e.g. inductive or capacitive transmission systems
• CPC Class Codes: H04B 5/26 using coils

Abstract

A base sheet 12 has a structure that stably couples a particular chip measuring 1 mm or less on paper with an antenna line by only disposing the chip and antenna line in such a manner that the chip and antenna line are close to each other, without electrically bringing the chip and antenna line into contact with each other. The base sheet 12 includes a chip 11 having a spiral coil 13 with at least one turn disposed on a surface of the chip, or inside the chip and near the surface thereof and an antenna line 14 having a conductor part 14A orbiting around the coil 13A of the chip 11 or directly over or directly below the coil 13A so that the conductor part is magnetically coupled with the coil 13A. This base sheet has a structure that stably couples even a chip measuring 1 mm or less on paper or the like with an antenna line by only disposing the chip and antenna line in such a manner that the chip and antenna line are close to each other, without physically bringing the chip and antenna line into contact with each other.

Claims

1. A base sheet comprising:

a chip wherein a spiral or helical coil having at least one turn is disposed on a surface of the chip, or inside the chip and near the surface; and

an antenna line including a conductor orbiting around the coil of the chip or directly above or directly below the coil so that the conductor is magnetically coupled with the coil.

2. The base sheet according to claim 1, wherein

the chip includes a semiconductor circuit for storing wirelessly readable information as well as the coil, and

the coil and the semiconductor circuit are electrically connected to each other.

3. The base sheet according to claim 2, wherein

the conductor part of the antenna line to be magnetically coupled with the coil of the antenna line, the conductor part orbiting around the coil or directly above or directly below the coil, is spiral, helical, or loop-shaped and has one turn or a plurality of turns.

4. The base sheet according to claim 2, wherein

the conductor part of the antenna line to be magnetically coupled with the coil is meandering, and

a plurality of the chip are disposed so that the chips are magnetically coupled with the antenna line.

5. The base sheet according to claim 4, wherein

the antenna line is a dipole antenna.

6. The base sheet according to claim 4, wherein

the antenna line is a loop antenna.

7. The base sheet according to claim 4, wherein

a plurality of the antenna line are formed in layers of a multilayered structure.