Semiconductor devices and manufacturing method therefor and electric commerce method and transponder reader

• US 20060151620A1
• Filed: 03/09/2006
• Published: 07/13/2006
• Est. Priority Date: 08/08/2002
• Status: Active Grant

• Current Assignee: Akira Sato, Mitsuo Usami
• Original Assignee: Akira Sato, Mitsuo Usami
• Inventors: Sato, Akira, Usami, Mitsuo
• Granted Patent: US 7,201,328 B2
• Time in Patent Office: Days
• US Class Current: 235/492
• CPC Class Codes: G06K 19/07728 the record carrier comprising means for protection against impact or bending, e.g. protective shells or stress-absorbing layers around the integrated circuit
• CPC Class Codes: G06K 19/07745 Mounting details of integrated circuit chips
• 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 19/0775 arrangements for connecting the integrated circuit to the antenna
• CPC Class Codes: H01L 2224/16225 the item being non-metallic, e.g. insulating substrate with or without metallisation
• CPC Class Codes: H01L 2224/16227 the bump connector connecting to a bond pad of the item
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/07811 Extrinsic, i.e. with electrical conductive fillers
• CPC Class Codes: H01L 2924/13091 Metal-Oxide-Semiconductor Field-Effect Transistor [MOSFET]

Abstract

A wireless IC tag is provided which includes a plate-shaped first conductor, a plate-shaped second conductor, and an IC chip which is sandwiched between the first conductor and the second conductor via a front surface and a rear surface of the IC chip. The IC chip includes a double voltage rectifier circuit to rectify an alternating voltage induced between the front surface and the rear surface of the IC chip. The second conductor functions as an antenna and also includes a slit extending from a center portion thereof in a longitudinal direction. The first conductor electrically connects both sides of the slit via the front surface and the rear surface of the IC chip.

Claims

1. A wireless IC tag comprising:

a plate-shaped first conductor;

a plate-shaped second conductor; and

an IC chip,

wherein said IC chip is sandwiched between said first conductor and said second conductor via a front surface and a rear surface of said IC chip,

wherein said IC chip includes a double voltage rectifier circuit to rectify an alternating voltage induced between the front surface and the rear surface of said IC chip,

wherein said second conductor is adapted to function as an antenna,

wherein said second conductor includes a slit extending from a center portion thereof in a longitudinal direction, and

wherein said first conductor electrically connects both sides of said slit of said second conductor via the front surface and the rear surface of said IC chip.

3. The wireless IC tag according to claim 1,

wherein said double voltage rectifier circuit includes a capacitor, a first diode, and a second diode,

wherein one end of said capacitor is connected to a cathode of said first diode and an anode of said second diode, and

wherein an anode of said first diode is electrically connected to the rear surface of said IC chip.

5. The wireless IC tag according to claim 3,

wherein, during a time when an alternating voltage is induced between the front surface and the rear surface of said IC chip, the anode of said first diode, a substrate potential of said IC chip, and the rear surface of said IC chip all have the same potential.

2. A wireless IC tag comprising:

a plate-shaped first conductor;

a plate-shaped second conductor; and

an IC chip,

wherein said IC chip includes a double voltage rectifier circuit, a first electrode on a front surface thereof, and a second electrode on a rear surface thereof,

wherein said double voltage rectifier circuit is adapted to rectify an alternating voltage induced between said first electrode and said second electrode,

wherein at least one of said first conductor and said second conductor includes a slit extending from a center portion thereof in a longitudinal direction, and

wherein at least one of said first conductor and said second conductor electrically connects both sides of said slit of the other conductor via said first electrode and said second electrode.

4. The wireless IC tag according to claim 2,

wherein said double voltage rectifier circuit includes a capacitor, a first diode, and a second diode,

wherein one end of said capacitor is connected to a cathode of said first diode and an anode of said second diode, and

wherein an anode of said first diode is electrically connected to the rear surface of said IC chip.

6. The wireless IC tag according to claim 4,

wherein, during a time when an alternating voltage is induced between the front surface and the rear surface of said IC chip, the anode of said first diode, a substrate potential of said IC chip, and the rear surface of said IC chip all have the same potential.

7. A wireless IC tag comprising:

a first conductor;

a second conductor; and

an IC chip,

wherein at least one of said first conductor and said second conductor is adapted to function as an antenna;

wherein said IC chip includes a first electrode formed on a front surface thereof, a second electrode formed on a rear surface thereof, and a rectifier circuit including a first diode, a second diode, and a capacitor,

wherein one end of said capacitor is connected to said first electrode,

wherein the other end of said capacitor is connected to a cathode of said first diode and an anode of said second diode,

wherein an anode of said first diode is connected to said second electrode,

wherein said second electrode has the same potential as a substrate potential of said IC chip,

wherein at least one of said first conductor and said second conductor includes a slit extending from a center portion thereof in a longitudinal direction,

wherein said IC chip is electrically connected between said first conductor and said second conductor via said first electrode and said second electrode, and

wherein the other ends of said first conductor and said second conductor are electrically connected to each other across said slit.

8. The wireless IC tag according to claim 7,

wherein said first diode and said second diode are formed of MOS transistors each having a gate and a drain thereof connected to one another.

9. The wireless IC tag according to claim 7,

wherein said capacitor is a MOS transistor having a gate corresponding to one end of said capacitor and a drain or a source corresponding to the other end of said capacitor.

10. The wireless IC tag according to claim 7,

wherein said IC chip is connected between said first conductor and said second conductor via anisotropic conductive adhesive.

11. The wireless IC tag according to claim 7,

wherein at least one of said first conductor and said second conductor forms a plate-shaped dipole antenna.

12. The wireless IC tag according to claim 7,

wherein said slit is provided in said second conductor, and said first conductor extends across said slit.