Non-contact information communication apparatus

• US 20030184495A1
• Filed: 07/22/2002
• Published: 10/02/2003
• Est. Priority Date: 04/01/2002
• Status: Active Grant

• Current Assignee: Japan Information System Company Limited
• Original Assignee: Japan Information System Company Limited
• Inventors: Tomon, Isao
• Granted Patent: US 6,727,862 B2
• Time in Patent Office: Days
• US Class Current: 343/895
• 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: 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

Abstract

A non-contact information communication apparatus according to the present invention has a bare IC and a sheet capacitor 3 implemented on substrate 1, and an antenna coil of vortical circle shape formed on the substrate 1 so as to enclose at least portion of the bare IC and the sheet capacitor 3. Because the number of turns of the antenna coil 4 is set to 7-10, the outer size of the antenna coil can be set to be equal to or smaller than one yen size. Each of the substrate 1, the antenna coil 4, the bare IC and the sheet capacitor 3 is thinned, and the thickness of the entire apparatus is set to be equal to or thinner than 100 μm. Because of this, the apparatus can be much thinner than the conventional apparatus, thereby using it in various field.

Claims

1. A non-contact information communication apparatus, comprising:

a resonance circuit which has an antenna coil and a capacitor connected between both ends of the antenna coil; and

an IC which embeds a rectification circuit configured to rectify resonance output of said rectification circuit, a communication circuit configured to perform demodulation processing of the received radio signal and modulation processing of a transmission signal, and a storing part configured to store data included in the radio signal,

wherein said resonance circuit and said IC are formed or implemented on a substrate;

said IC operates by using a voltage rectified by said rectification circuit as a driving power supply;

said antenna coil is formed of vortical pattern with the number of turns n (n is an integer equal to or more than

     2) enclosing at least portion of said capacitor and said IC on the substrate; and

said non-contact information communication apparatus has a size equal to or smaller than that of one yen, and a thickness equal to or thinner than that of one yen.

2. The non-contact information communication apparatus according to claim 1, wherein said antenna coil has a shape of vortical circle or vortical rectangle.

3. The non-contact information communication apparatus according to claim 1, wherein thickness of said antenna coil is within 10-35 μ

m, and formed of material including copper.

4. The non-contact information communication apparatus according to claim 1, wherein the number of turns n is within 7-10.

5. The non-contact information communication apparatus according to claim 1, wherein a line length of said antenna coil is within 360 mm.

6. The non-contact information communication apparatus according to claim 1, wherein maximum outer size of said antenna coil is equal to or smaller than 18 mm.

7. The non-contact information communication apparatus according to claim 1, wherein the radio signal is a frequency signal of 13.56 MHz.

8. The non-contact information communication apparatus according to claim 1, wherein said capacitor is formed of at least one of polyimide, polyethylene terephthalate, PEN and liquid crystal polymer.

9. The non-contact information communication apparatus according to claim 1, wherein said capacitor has three terminals which are arranged on substantially one line with one more than terminals of said IC.

10. The non-contact information communication apparatus according to claim 1, wherein a first terminal of said antenna coil and a first terminal of said capacitor are electrically conducted to each other by a jumper cable;

the first terminal of said capacitor and a first terminal of said IC are conducted to each other by a pattern on the substrate; and

a second terminal of said IC and said antenna coil are conducted to each other by pattern on the substrate.

11. The non-contact information communication apparatus according to claim 10, wherein said jumper cable is formed by using a portion of the electrode of said capacitor.

12. The non-contact information communication apparatus according to claim 1, wherein minimum-length distance between the terminal of said IC and the terminal of said capacitor is set to be within 15 mm.

13. The non-contact information communication apparatus according to claim 1, wherein said capacitor and said IC are set to substantially the same shape and the same size to each other.

14. The non-contact information communication apparatus according to claim 1, where in adhesive is coated with faces opposite to faces contacted on the substrate of said capacitor and said IC.