KR20110001165A

KR20110001165A - Rfid module

Info

Publication number: KR20110001165A
Application number: KR1020090058570A
Authority: KR
Inventors: 강태민
Original assignee: 주식회사 하이닉스반도체
Priority date: 2009-06-29
Filing date: 2009-06-29
Publication date: 2011-01-06

Abstract

PURPOSE: An RFID reader and an RFID module using one common antenna connected wth an RFID tag are provided to connect the common antenna to the RFID tag in a parallel method of a module and connects one common antenna to the RFID tag and RFID reader. CONSTITUTION: A common antenna(20) is arranged on a substrate(10). An RFID tag(30) is electrically connected to the common antenna. An RFID reader(40) is electrically connected to the common antenna. A first switch unit(50) electrically disconnects the RFID tag and the common antenna. A second switch unit(60) electrically disconnects the RFID reader and the common antenna. A controller(70) disconnects the first or the second switch units by external signal.

Description

RFID module {RFID MODULE}

The present invention relates to an RFID module.

In recent years, the development of RFID technology, which is a short-range communication means, is being made rapidly. RFID technology inputs and outputs data at close range using an RFID reader and an RFID tag.

In general, an RFID reader antenna is electrically connected to an RFID reader, and an RFID reader antenna is electrically connected to an RFID tag.

Recently, development of various electronic products having both an RFID reader and an RFID tag has been developed, but it is difficult to reduce the size of the electronic product having them due to the volume occupied by the RFID reader antenna and the RFID tag antenna.

The present invention provides an RFID module in which an RFID reader and an RFID tag can use one common antenna.

According to the present invention, an RFID module includes a substrate, a common antenna disposed on the substrate, an RFID tag disposed on the substrate and electrically connected to the public antenna, an RFID reader disposed on the substrate and electrically connected to the public antenna, The first switch unit electrically disconnects the RFID tag and the common antenna, the second switch unit electrically disconnects the RFID reader and the common antenna, and any one of the first and second switch units by an external signal. It includes a controller for disconnecting.

The RFID module according to the present invention further includes a semiconductor chip having a connection pad disposed on the substrate and a bonding pad disposed on the substrate and electrically connected to the connection pad.

In the RFID module, the RFID tag and the RFID reader are disposed on a semiconductor chip, and the common antenna is disposed on the substrate corresponding to the outside of the semiconductor chip.

The RFID module includes an inverter for turning on one of the first and second switch units and turning off one of the first and second switch units.

The RFID module includes a transmission gate having the first and second switch units having a PMOS transistor and an NMOS transistor, respectively.

According to the present invention, an RFID tag and an RFID reader are disposed on one substrate, and a common antenna is connected to the RFID tag and the RFID reader in parallel, and one of the public antennas is connected to the RFID tag and the RFID reader to reduce the size of the RFID module. It has the effect of making it compact.

Hereinafter, an RFID module according to embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to the following embodiments, and those skilled in the art will appreciate The present invention may be embodied in various other forms without departing from the spirit of the invention.

1 is a plan view illustrating an RFID module according to an embodiment of the present invention.

Referring to FIG. 1, the RFID module 100 includes a substrate 10, a common antenna 20, an RFID tag 30, an RFID reader 40, a first switch unit 50, and a second switch unit 60. And a controller 70.

The substrate 10 has a rectangular parallelepiped plate shape, for example. The substrate 10 may be, for example, a printed circuit board or a synthetic resin substrate.

The common antenna 20 may be disposed on a top surface and / or a bottom surface of the substrate 10 that faces the top surface. In this embodiment, the common antenna 20 is disposed in the form of a strip on the upper surface of the substrate 10, for example. The common antenna 20 has a closed loop shape, and part of the common antenna 20 branches in a parallel manner.

In this embodiment, a ferrite shielding film may be interposed between the substrate 10 and the common antenna 20.

The RFID tag 30 is disposed on the substrate 10. The RFID tag 30 includes an integrated circuit, and information recorded in the integrated circuit is transmitted to an external RFID reader (not shown) through the common antenna 20 to be described later. Since the RFID tag 30 transmits data in the form of radio waves, it is possible to transmit data not only in a relatively close distance but also in a long distance in proportion to the strength of the radio waves.

The RFID tag 30 is electrically connected to the first part 22 of the first and second parts 22 and 24 branched in parallel in the common antenna 20, and the RFID tag 30 is connected to the public antenna. The information in the RFID tag 30 is transmitted to the outside using the reference numeral 20.

The RFID reader 40 is disposed on the substrate 10. The RFID reader 40 reads information stored in an external RFID tag.

The RFID reader 40 is electrically connected to the second part 24 of the first and second parts 22 and 24 branched in parallel in the common antenna 20.

Two first switch units 50 are arranged in series in the first part 22 branched from the common antenna 20 in a parallel manner.

The first switch unit 50 may be, for example, a transmission gate which is a combination of a PMOS transistor and an N MOS transistor, as shown in FIG. 2.

When "data 0" is input to the PMOS transistor and "data 1" is input to the NMOS transistor in the first switch unit 50, which is the transmission gate, the switch unit of the transmission gate is turned "on". On the other hand, when " data 1 " is input to the PMOS transistor and " data 0 "

Two second switch units 60 are arranged in series in the second part 24 branched from the common antenna 20 in a parallel manner.

As shown in FIG. 2, the second switch unit 70 may be a transmission gate that is a combination of a PMOS transistor and an N MOS transistor.

When "data 0" is input to the PMOS transistor and "data 1" is input to the NMOS transistor in the second switch unit 60, which is the transmission gate, the switch unit of the transmission gate is turned "on". On the other hand, when “data 1” is input to the PMOS transistor and “data 0” is input to the NMOS transistor, respectively, in the second switch unit 60 which is the transmission gate, the switch unit of the transmission gate is “off”.

The controller 70 is connected to the first switch unit 50 and the second switch unit 60, and the controller 70 selectively selects any one of the first switch unit 50 and the second switch unit 70. Inverter 72 is included for operation. The controller 70 receives first and second signals S1 and S2 for operating either the RFID reader 40 or the RFID tag 30. The first signal S1 is a signal for operating the RFID tag 30, and the second signal S2 is a signal for operating the RFID reader 40.

3 is a plan view showing that the RFID reader shown in FIG. 1 is operated.

Referring to FIG. 3, when the second signal S2 for operating the RFID reader 40 is input to the controller 70, the controller 70 outputs "data 0", thereby causing the RFID tag 30 to be input. ), "Data 1" is applied to the PMOS transistor of the first switch unit 50, and "data 0" is applied to the NMOS transistor of the first switch unit 50, so that the first switch unit 50 is "off". (Off) ", and the common antenna 20 and the RFID tag 30 are electrically disconnected.

On the other hand, "data 0" output from the controller 70 is inverted twice by the two inverters 72 so that "data 0" is applied to the PMOS transistor of the second switch unit 60, and the second switch unit ( "Data 1" is applied to the NMOS transistor of 60). As a result, the second switch unit 60 is in an "on" state, whereby the common antenna 20 is electrically connected to the RFID reader 40.

4 is a plan view showing that the RFID tag shown in FIG. 1 operates.

Referring to FIG. 4, when the first signal S1 for operating the RFID tag 30 is input to the controller 70, the controller 70 outputs “data 1” and two inverters connected in series ( 72, “data 1” is applied to the PMOS transistor of the second switch unit 60 connected to the RFID reader 40, and “data 0” is applied to the NMOS transistor of the second switch unit 60. The two switch unit 60 is " off ", and the common antenna 20 and the RFID reader 40 are electrically disconnected.

On the other hand, "data 1" output from the controller 70 is inverted once by the inverter 72 and then "data 0" is applied to the PMOS transistor of the first switch unit 50, and the first switch unit 50 "Data 1" is applied to the NMOS transistor of. As a result, the first switch unit 50 is in an "on" state, whereby the common antenna 20 is electrically connected to the RFID tag 30.

5 is a cross-sectional view showing an RFID module according to another embodiment of the present invention.

Referring to FIG. 5, a connection pad 12 is disposed on a substrate 10 of the RFID module 100, and a semiconductor chip 80 having a bonding pad 84 is disposed on the substrate 10. The bonding pads 84 and the connection pads 12 are electrically connected by, for example, conductive wires 86, and the semiconductor chip 80 is connected to the RFID reader 40 and / or RFID through the substrate 10. It is electrically connected with the tag 30. In the present exemplary embodiment, various active or passive elements such as transistors, inductors, diodes, capacitors, resistors, and the like may be mounted on the substrate 10 in addition to the semiconductor chip 80.

6 is a plan view illustrating an RFID module according to another embodiment of the present invention. The RFID module shown in FIG. 6 has substantially the same configuration as the RFID module described with reference to FIG. 1 except for the common antenna. Therefore, the same name and the same reference numeral will be given to the same configuration.

Referring to FIG. 6, the RFID module 100 includes an external substrate 18, a semiconductor chip 80, a first common antenna 26, a second common antenna 28, an RFID tag 30, and an RFID reader 40. ), A first switch unit 50, a second switch unit 60, and a controller 70.

For example, on the semiconductor chip 80, the RFID tag 30 and the RFID reader 40, the first and the second switch, respectively, connected in parallel with the first common antenna 26 and the first common antenna 26, respectively. The portions 50, 60 are arranged.

On the other hand, a second common antenna 28 electrically connected to the first common antenna 26 is disposed on the external substrate 18.

According to the present exemplary embodiment, the size of the semiconductor chip or the semiconductor package can be further reduced by disposing a part of the common antenna outside the semiconductor chip or the semiconductor package.

As described in detail above, the RFID module is arranged by arranging an RFID tag and an RFID reader on one substrate, connecting a common antenna to the RFID tag and the RFID reader in parallel, and allowing one of the public antennas to be connected to the RFID tag and the RFID reader. It has the effect of making the size of compact.

In the detailed description of the present invention described above with reference to the embodiments of the present invention, those skilled in the art or those skilled in the art having ordinary knowledge in the scope of the present invention described in the claims and It will be appreciated that various modifications and variations can be made in the present invention without departing from the scope of the art.

FIG. 2 is a plan view illustrating the first switch unit illustrated in FIG. 1.

3 is a plan view showing that the RFID reader shown in FIG. 1 is operated.

4 is a plan view showing that the RFID tag shown in FIG. 1 operates.

6 is a plan view illustrating an RFID module according to another embodiment of the present invention.

Claims

A common antenna disposed on the substrate;

An RFID tag disposed on the substrate and electrically connected to the common antenna;

An RFID reader disposed on the substrate and electrically connected to the common antenna;

A first switch unit electrically disconnecting the RFID tag and the common antenna;

A second switch unit electrically disconnecting the RFID reader and the common antenna; And

And a controller for disconnecting any one of the first and second switch units by an external signal.

The method of claim 1,

A connection pad disposed on the substrate; And

And a semiconductor chip disposed on the substrate and having a bonding pad electrically connected to the connection pad.

The method of claim 1,

The RFID tag and the RFID reader are disposed on a semiconductor chip, and the common antenna is disposed on the substrate corresponding to the outside of the semiconductor chip.

The method of claim 1,

And the controller comprises a control unit for turning on one of the first and second switch units and turning off one of the first and second switch units.

The method of claim 4, wherein

The control unit RFID module, characterized in that it comprises an inverter.

The method of claim 1,

And the first and second switch units comprise a transmission gate having a PMOS transistor and an NMOS transistor, respectively.