CN103746182A - Process for printing antenna on surface of radio frequency module - Google Patents

Abstract

The invention relates to the technical field of antenna manufacturing, in particular to a process for printing an antenna on the surface of a radio frequency module, which comprises the steps of firstly completing the manufacture of the radio frequency module, wherein the radio frequency module contains an IC chip; then, the electrodes of the IC chip in the radio frequency module are connected in a laser drilling and conductive object electroplating mode, so that the electrodes of the IC chip extend to the surface of the radio frequency module; and then, obtaining an antenna which is in conductive communication with the IC chip on the surface of the radio frequency module by screen printing an antenna pattern on the surface of the radio frequency module, and finally, attaching a protective film for preventing oxidation and damage to obtain a finished product. The invention realizes that the antenna is printed on the surface of the radio frequency module by the screen, which is beneficial to the development of wireless electronic products towards smaller, lighter and thinner directions; the precision and the thickness reach the micron level, the process can realize the technical advantages of high speed, high precision and no pollution and the possibility of large-scale industrialization, accords with industrial utilization, and has good economic benefit and social benefit.

Description

The process of printing the antenna on the surface of the RF module

technical field

The invention relates to the technical field of antenna manufacturing, in particular to the technical field of radio frequency module antenna manufacturing.

Background technique

With the development of today's wireless electronic products in the direction of smaller, lighter and thinner, various ultra-small and thin radio frequency module chips have been widely used, such as radio frequency identification identification cards, which can enable employees to enter the building lock The warehouse can track the location of the goods, the radio frequency transponder on the car can also be used to collect tolls or parking fees, the radio frequency tag can also be attached to the livestock to facilitate identification and maintenance management, and some radio frequency tags can also be attached On clothing, personal belongings, and even implanted in the human body. In the long run, the market for radio frequency module chips (RFID), especially high-frequency long-distance electronic tags (UHF RFID) and active radio frequency module chips (Active RFID), will gradually mature in the next few years, and it will be another market with broad market potential. Market prospect and huge capacity market.

At present, there are four main manufacturing processes for traditional RFID tag antennas: copper wire winding RFID tag antennas, electroplating copper to manufacture RFID tag antennas, conductive ink printing RFID tag antennas and metal aluminum foil etching to manufacture RFID tag antennas. According to the known technology, they have their own factors that restrict their wide application: the process scheme of copper wire winding RFID tag antenna is not only limited by the size and number of coils of the RFID tag antenna in actual production, but also limited by the packaging process. The pressure effect of the copper wire wound RFID tag antenna is destroyed, so that the design value of the copper wire wound RFID tag antenna deviates greatly from the theoretical value, which will eventually affect the inductance value of the copper wire wound RFID tag antenna. , and its scope of application is also limited.

The process scheme of electroplating copper to manufacture RFID tag antennas, due to the large production investment, long cycle, and difficult disposal of waste liquid, plus the uniformity of coating distribution of electroplating copper to manufacture RFID tag antennas, the firmness of the coating and the substrate PET and the like These requirements further increase the difficulty of electroplating copper to manufacture the RFID tag antenna process.

The conventional process scheme of conductive ink printing RFID tag antenna has a defect that the resistivity is very large and the precision reaches the micron level; secondly, the antenna of conductive ink printing RFID tag cannot be bent, and its bending resistance is poor; thirdly, conductive ink The surface printing quality of the printed RFID tag antenna ink layer, the uniformity of the thickness of the ink layer, and the key control of the subsequent process of mounting the RFID tag chip, etc., further increase the difficulty of the conductive ink printing RFID tag antenna process.

The technical scheme of metal aluminum foil etching to manufacture RFID tag antennas has the disadvantages of high cost, low precision, large tag size, low efficiency, environmental pollution, single tag substrate, limited application fields of tags, and environments such as anti-metal shielding, waterproof, and anti-folding. The friendliness is poor, which also restricts the wide application of metal aluminum foil etching to manufacture RFID tag antenna technology.

In view of the defects and inconveniences of the above-mentioned conventional RFID tag antenna manufacturing process, the applicant upholds the spirit of research, innovation and excellence, and uses professional vision and professional knowledge to propose a method that is suitable for industrial use and is conducive to improving production efficiency and Quality antenna printing process on the surface of the RF module.

Contents of the invention

The purpose of the present invention is to overcome the defects of the prior art and provide an optimized and high-end process scheme, which is suitable for industrial use and is beneficial to improve the production efficiency and quality of the antenna printing process on the surface of the radio frequency module.

To achieve the above object, the present invention adopts the following technical solutions:

The process of printing the antenna on the surface of the radio frequency module. This process first completes the production of the radio frequency module, and the radio frequency module contains the IC chip; then connects the electrodes of the IC chip in the radio frequency module by laser drilling and electroplating conductors , to realize that the electrodes of the IC chip extend to the surface of the radio frequency module; and then print the antenna pattern on the surface of the radio frequency module by screen printing, and the antenna connected to the IC chip can be obtained on the surface of the radio frequency module, and finally paste it to prevent oxidation and Damaged protective film, get finished product.

The screen is first coated with a photosensitive mask material on the screen fabric, and then covered on the photosensitive mask material through a mask plate, and after being illuminated, the antenna pattern on the mask plate is copied on the silk mesh fabric, and the antenna pattern It is the printing window.

The surface of the radio frequency module refers to the surface of compounds and the like that protect the chip.

In view of the defects and inconveniences of the four known traditional RFID tag antenna manufacturing processes, the present invention proposes a solution for manufacturing radio frequency module RFID tag antennas with high-end screen printing technology with a precision and thickness of micron level. Printing the antenna screen on the surface of the radio frequency module is conducive to the development of wireless electronic products in the direction of smaller, lighter and thinner; this process can realize the technical advantages of high speed, high precision, pollution-free and large-scale industrialization Possibly, it is in line with industrial utilization, is conducive to improving production efficiency and quality, and has good economic and social benefits.

Description of drawings:

Accompanying drawing 1 is the schematic top view of the structure that the antenna of the present invention is printed on the surface of the radio frequency module;

Accompanying drawing 2 is the three-dimensional structural diagram of the antenna of the present invention printed on the surface of the radio frequency module.

Detailed ways:

The present invention is further described below in conjunction with accompanying drawing:

Referring to Fig. 1, shown in 2, the present invention relates to a kind of technology that antenna is printed on the surface of radio frequency module, this technology first completes radio frequency module 1 and makes, and radio frequency module 1 contains IC chip 3; Then by laser drilling and The electrode of the IC chip 3 in the radio frequency module is connected by electroplating conductive material 2, the conductive material 2 has good conductivity, and the electrode of the IC chip 3 is extended to the surface of the radio frequency module; The screen printing antenna pattern, the screen is to first coat the photosensitive mask material on the screen fabric, and then cover the photosensitive mask material through the mask plate, and then light the photosensitive mask material to harden, and then water Part of the photosensitive mask material that is not irradiated by light is washed away, so that the antenna pattern on the mask plate can be copied on the screen fabric, and the antenna pattern is the printing window; then, the gold, silver, copper, aluminum, etc. The antenna base material of ink nature is coated on the screen, and the antenna pattern is printed on the surface of the radio frequency module 1 through the printing window of the screen, and the antenna 4 that is conductively connected with the IC chip 3 can be obtained on the surface of the radio frequency module. A protective film to prevent oxidation and damage is applied to obtain the finished product. In the present invention, the surface of the radio frequency module 1 refers to the surface of compounds and the like that protect the chip, such as polymers, outer casings, and the like. The wire mesh can be a foil mesh drilled from nickel foil, which has good structure.

The invention realizes the antenna screen printing on the surface of the radio frequency module, and the precision and thickness of the antenna reach the micron level, which is conducive to the development of wireless electronic products in the direction of smaller, lighter and thinner; this process can achieve high speed, high precision, Pollution-free technical advantages and the possibility of large-scale industrialization are in line with industrial utilization and are conducive to improving production efficiency and quality. They are suitable for various ultra-small and thin RF module chip applications, such as ultra-thin mobile phones, touch screens, digital cameras, and digital video cameras. And other 3C products and other component configurations have good economic and social benefits.

Claims (3)

1. The process of printing the antenna on the surface of the radio frequency module, which is characterized in that: the process first completes the production of the radio frequency module (1), and the radio frequency module (1) contains the IC chip (3); then through laser drilling and electroplating The electrode of the IC chip (3) in the RF module is connected by means of a conductive object (2), so that the electrode of the IC chip (3) extends to the surface of the RF module; and then passes the wire mesh on the surface of the RF module (1) By printing the antenna pattern, the antenna (4) conductively connected with the IC chip (3) can be obtained on the surface of the radio frequency module, and finally a protective film to prevent oxidation and damage is attached to obtain the finished product. 2. The process of printing the antenna on the surface of the radio frequency module according to claim 1, characterized in that: the screen is first coated with a photosensitive mask material on the screen fabric, and then covered with a photosensitive mask through a mask. On the mask material, after being illuminated, the antenna pattern on the mask plate is copied on the screen fabric, and the antenna pattern is the printing window. 3. The process of printing the antenna on the surface of the radio frequency module according to claim 1, characterized in that: the surface of the radio frequency module (1) refers to the surface of the compound and the like that protect the chip.

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