CN207731288U - Radio frequency identification module - Google Patents

Abstract

A radio frequency identification module comprises a chip and an inductor, wherein the chip is provided with more than two electronic contacts, the inductor is provided with two electrodes arranged on the surface of the inductor, and the projections of the electronic contacts along the connecting direction of the chip and the inductor fall in the electrodes, so that the chip is directly connected with the inductor.

Description

RFID Module

technical field

The utility model relates to a wireless communication device, specifically a wireless radio frequency module, which has the advantages of miniaturization and automatic production.

Background technique

With the rise of the Internet of Things, radio frequency identification modules have been widely used. The current radio frequency identification module uses the substrate to connect the inductor and the chip, but this method will occupy a large volume and is not conducive to miniaturization. The production process is relatively complicated, and it is difficult to increase production capacity through automated production, making the production cost low easy to lower.

Utility model content

The purpose of the utility model is to provide a radio frequency identification module, which has the advantages of miniaturization and automatic production.

The aforementioned radio frequency identification module includes a chip and an inductor, the chip has more than two electronic contacts, the inductor has a magnetic core, a coil, and two electrodes are arranged on the surface of the inductor and are electrically connected to the coil, wherein the electronic The projection of the contact point along the connection direction between the chip and the inductor falls completely inside the electrode, and the chip is directly connected to the electrode of the inductor through the electronic contact.

Preferably, the two or more electronic contacts are copper foils, solder pads, solder balls or lead frames.

Preferably, the coil is wound around the magnetic core, and the inductor further has a sealant sealing the magnetic core and the coil.

Preferably, the two electrodes are arranged on the surface of the encapsulant.

Preferably, the coil is located inside the magnetic core.

Preferably, the distance between the two electrodes along a first direction parallel to the first direction is less than or equal to the distance between two adjacent electronic contacts along the first direction parallel.

Therefore, during manufacture of the radio frequency identification module, the chip can be placed on the inductor using a mounter and other equipment, and then the electrical connection between the chip and the inductor can be quickly completed using surface mount technology (SMT). The manufacturing process is simple and fast. Moreover, no printed circuit board is required, which is conducive to miniaturization and automatic production, and can reduce material and manufacturing costs.

Description of drawings

Figure 1 is an exploded perspective view of the embodiment.

Fig. 2 is a cross-sectional view of the assembled embodiment.

FIG. 3 is a schematic diagram of the bottom of the chip and the top of the inductor in an embodiment.

Explanation of reference signs:

10 chips 11 electrical contacts

20 Inductor 21 Core 22 Coil

23 Sealant 24 Electrode

W1,W2 Distance A First direction

Detailed ways

In order to clearly illustrate the specific structure and technical effects of the present utility model, the accompanying drawings are described below. The directional descriptions such as up, down, front, back, left, and right described in the description are intended to help understanding, and are not intended to limit the implementation of the present utility model.

The embodiment provided by the utility model is a radio frequency identification module, please refer to Fig. 1 to Fig. 3, it is mainly composed of a chip 10 and an inductor 20, the chip 10 is directly electrically connected to the aforementioned inductor by using surface-mounting technology device 20. Wherein, the aforementioned chip 10 is used to provide a signal processing function, and the inductor 20 is used as an induction coil to generate an induced current through electromagnetic induction.

Please refer to FIG. 2 and FIG. 3 , the chip 10 has a body 11 and a plurality of electronic contacts 12 are formed on the bottom surface of the body 11 . There is an integrated circuit inside the main body 11, and the electronic contact 12 can be made of conductive materials such as copper foil, solder pad, solder ball or lead frame (Lead Flame), and is electrically connected with the integrated circuit inside the main body 11 as an electronic signal transmission path . In this embodiment, the number of the aforementioned electronic contacts 12 is four, and in other embodiments, there may be only two or more electronic contacts 12 to realize the function of the chip 10 . As shown in FIG. 3 , the aforementioned electronic contacts 12 are distributed on the left and right sides of the bottom surface of the body 11 , and the distance between two adjacent electronic contacts 12 along the length direction of the body 11 (which can be defined as the first direction A) is W1.

Please refer to FIG. 2 and FIG. 3 , the inductor 20 has a magnetic core 21, a coil 22 wound around the magnetic core 21, a sealant 23 to seal the aforementioned magnetic core 21 and the coil 22, and two electrodes 24 are provided on the top of the sealant 23. noodle. The aforementioned electrodes 24 can be made of conductive materials by printing, coating or electroplating, and are electrically connected to the wires of the coil 22 . As shown in FIG. 3 , the distance between the two electrodes 24 along the parallel first direction A is W2, and the distance W2 is less than or equal to the distance W1, so that the projection of the electronic contact 12 along the direction of connecting the chip 10 to the inductor 20 falls completely. within the two electrodes 24 .

During manufacture of the radio frequency identification module of this embodiment, conductive material can be printed or coated on the predetermined position of the electrode 24, and then the electronic contact 12 of the chip 10 is automatically placed on the inductor by using equipment such as a surface mount system. The electrode 24 of the inductor 20 is then reflowed to form the electrode 24, and at the same time, the electrical connection between the chip 10 and the inductor 20 is completed. The manufacturing process is simple and fast.

It is worth mentioning that the applicable inductors of the present invention are not limited to the aforementioned embodiments. The magnetic core and the encapsulant may also be integrated into a single magnetic core component by using magnetic composite materials, and the coil is also packaged inside the single magnetic core component.

It can be seen from the foregoing description that the radio frequency identification module provided by the present invention can be manufactured automatically and quickly, and does not need to use a printed circuit board (PCB) as a substrate, which is conducive to miniaturization and further reduces material costs.

Claims (6)

1. a kind of radio frequency identification module, includes a chip and an inductor, which there are more than two electronics to connect Point, the inductor have a magnetic core, and a coil and two electrodes are set to the inductor surface and electrically connect with the coil It connects, it is characterised in that：The projection that described two above electronic contacts connect direction along the chip with the inductor is fallen completely In described two electrodes, which is directly connected to described two electricity of the inductor with described two above electronic contacts Pole.

2. radio frequency identification module as described in claim 1, which is characterized in that described two above electronic contacts are copper Foil, weld pad, tin ball or lead frame.

3. radio frequency identification module as described in claim 1, which is characterized in that the coil is wound in the magnetic core, the inductance Device also there is an adhesive body to seal the magnetic core and the coil.

4. radio frequency identification module as claimed in claim 3, which is characterized in that described two electrodes are set to the adhesive body Surface.

5. radio frequency identification module as described in claim 1, which is characterized in that the coil is located inside the magnetic core.

6. the radio frequency identification module as described in claim 1 to 5 any of which, which is characterized in that described two electrode edges A parallel first direction be smaller than or the spacing equal to two neighboring electronic contact along the parallel first direction.