Semiconductor device, RFID tag and label-like object

• US 7,405,665 B2
• Filed: 12/17/2004
• Issued: 07/29/2008
• Est. Priority Date: 12/19/2003
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Yamazaki, Shunpei
• Primary Examiner(s): La; Anh V
• Application Number:
  US11/013,370
• Publication Number:
  US 20050134463A1
• Time in Patent Office: 1,320 Days
• Field of Search: 340/572.8, 340/572.1, 340/572.5, 340/572.7, 340/571, 340/568.1, 235/492, 235/383, 235/385, 298/25, 298/43, 298/45, 257/679, 257/678, 257/666, 257/773, 257/674
• US Class Current: 340/572.8
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
• 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: H01L 2224/16225 the item being non-metallic, e.g. insulating substrate with or without metallisation
• CPC Class Codes: H01L 2224/73204 the bump connector being embedded into the layer connector
• CPC Class Codes: Y10T 29/49117 Conductor or circuit manufacturing

Abstract

An object of the present invention is to supply a semiconductor device capable of communicating data through radio communication, such as an RFID tag or a label-like object, with high productivity at low cost. In the invention, a memory portion, a signal control circuit portion and a communication circuit portion are formed with the use of a TFT formed over an insulating substrate, and the insulating substrate is fixed opposite to a support provided with an antenna so that the antenna is connected to a terminal portion connected to a communication circuit. The invention is an RFID tag and a label-like object including an ID chip whose memory portion, signal control portion and communication circuit portion are formed with the use of TFTs formed over an insulating substrate and an antenna formed to connect to a terminal portion of the ID chip, in which data stored in a memory portion or data to be stored in a memory portion can be communicated through a communication circuit by radio communication.

Claims

1. A semiconductor device comprising:

an insulating substrate;

a memory portion over the insulating substrate;

a signal control circuit portion over the insulating substrate;

a communication circuit portion over the substrate and connected to a terminal portion; and

an antenna electrically connected to the terminal portion,

wherein each of the memory portion, the signal control circuit portion and the communication circuit portion comprises a thin film transistor comprising a crystalline semiconductor layer comprising a channel forming region formed over the insulating substrate.

2. A semiconductor device according to claim 1, wherein the insulating substrate is formed of one of glass, quartz and plastic.

3. A semiconductor device according to claim 1, wherein the antenna is electrically connected to the terminal portion through an anisotropic conductive adhesive.

4. A semiconductor device comprising:

an insulating substrate;

a memory portion over the insulating substrate;

a signal control circuit portion over the insulating substrate;

a communication circuit portion connected to a terminal portion over the insulating substrate; and

a support over the memory portion, the signal control circuit portion and the communication circuit portion,

wherein the support is provided with an antenna,

wherein the antenna is electrically connected to the terminal portion, and

wherein each of the memory portion, the signal control circuit portion and the communication circuit portion comprises a thin film transistor comprising a crystalline semiconductor layer comprising a channel forming region formed over the first insulating substrate.

5. A semiconductor device according to claim 4, wherein the insulating substrate is formed of one of glass, quartz and plastic.

6. A semiconductor device according to claim 4, wherein the antenna is electrically connected to the terminal portion through an anisotropic conductive adhesive.

7. A label-like object comprising;

an ID chip comprising;

a memory portion;

a signal control circuit portion;

a communication circuit portion; and

a terminal portion; and

an antenna electrically connected to the terminal portion,

wherein each of the memory portion, the signal control circuit portion and the communication circuit portion comprises a thin film transistor comprising a crystalline semiconductor layer comprising a channel forming region formed over an insulating substrate, and

wherein the label-like object is capable of sending data stored in the memory portion or receiving data to be stored in the memory portion through the communication circuit by radio communication.

8. A label-like object according to claim 7, wherein the antenna is formed adjacent to an insulating substrate.

9. A label-like object according to claim 8, wherein the insulating substrate is formed of one of glass, quartz and plastic.

10. A label-like object according to claim 7, wherein the antenna is electrically connected to the terminal portion through an anisotropic conductive adhesive.

11. A label-like object comprising;

an insulating substrate;

an ID chip over the insulating substrate, comprising;

a memory portion;

a signal control circuit portion;

a communication circuit portion; and

a terminal portion;

a support over the ID chip; and

one of a label and a packaging,

wherein the support is provided with an antenna electrically connected to the terminal portion,

wherein each of the memory portion, the signal control circuit portion and the communication circuit portion comprises a thin film transistor comprising a crystalline semiconductor layer comprising a channel forming region formed over the insulating substrate,

wherein one of the insulating substrate and the support is attached to the one of the label and the packaging.

12. A label-like object according to claim 11, wherein the insulating substrate is formed of one of glass, quartz and plastic.

13. A label-like object according to claim 11, wherein the antenna is electrically connected to the terminal portion through an anisotropic conductive adhesive.

14. A label-like object comprising;

an insulating substrate provided with an ID chip;

one of a label and a packaging provided with an antenna;

wherein the ID chip comprises;

a memory portion;

a signal control circuit portion;

a communication circuit portion; and

a terminal portion;

wherein the antenna is electrically connected to the terminal portion,

wherein the ID chip and the antenna are facing to each other, and

wherein each of the memory portion, the signal control circuit portion and the communication circuit portion comprises a thin film transistor comprising a crystalline semiconductor layer comprising a channel forming region.

15. A label-like object according to claim 14, wherein the insulating substrate is formed of one of glass, quartz and plastic.

16. A label-like object according to claim 14, wherein the antenna is electrically connected to the terminal portion through an anisotropic conductive adhesive.