Laser Trimming Machine for Sensor
The laser resistance trimming machine of Wuhan Questt ASIA Technology Co., Ltd. is specially developed and produced for the thick film circuit and thin film circuit industry. Source trimming (resistance adjustment) and active trimming (circuit function adjustment) are mainly used for high-precision trimming of thin-film, thick-film, hybrid integrated circuits and various electronic modules, involving the following industries:
l lAutomotive Electronics
l lCommunication electronics
l lMilitary industry is in scientific research
l lIndustrial Electronics
The laser resistance trimming machines produced by our company are independently developed from the core measurement control system, software system, etc., and have all independent intellectual property rights, which can provide customers with comprehensive laser resistance trimming application solutions.
LT7 series laser resistance trimming machine is a high-end configuration type laser resistance trimming machine launched by Wuhan Questt. LT7 series products adopt advanced special laser for laser resistance trimming.
High precision of resistance adjustment
Fast resistance adjustment
High reliability and stability
Low operating and maintenance costs
The laser electro-optical conversion efficiency reaches 25%, and the average daily power consumption is less than 10 degrees, which is 1/10 of the traditional flash lamp pumped solid-state laser. Long-term use can save users a lot of energy expenditure, reduce carbon emissions, long service life, high performance Stable and maintenance-free, reducing downtime.
The principle of laser resistance trimming is to use a very fine laser beam to hit the thick and thin film resistors, and realize the cutting of thick and thin film circuits by vaporizing the resistor body. The laser beam cuts the thick and thin film resistors according to the program predetermined by the computer, and changes the resistance value of the resistors by changing the geometric shapes of the thick and thin film resistors. As the laser cutting process progresses, the real-time measurement circuit monitors the changes in the resistance values of the thick and thin film resistors in real time, and the resistance values of the thick and thin film resistors are constantly approaching the target resistance value. That is, the laser resistance trimming process is realized.
When the thick film resistor is used in the electronic module, the function modification of the electronic module can be realized by adjusting the resistance change so that the output signal of the electronic module also changes.
Laser resistance trimming changes the conductive cross-sectional area and conductive length of the resistor body, and can trim the resistor body below the target resistance value to the required accuracy range.
Equipment outline drawing (subject to the actual object)
Used to cut thick and thin film resistors, it is a "light knife" for resistor cutting. This machine adopts advanced special laser for laser resistance adjustment, with good beam quality, high peak power and excellent incision quality. Small and compact, air-cooled, with high efficiency and reliability not found in other lasers. The core device pump source, crystal, Q switch, etc. are all imported.
Special laser for laser resistance trimming
(2)． Laser beam positioning system
It is used to realize the positioning of the laser beam and the control of the movement track (cutting path). Adopt precision galvanometer system. Controls the position of the beam in the X and Y directions. Shorten beam positioning time and trimming time, high work efficiency, high speed and high precision.
(3)．CCD image positioning system
Imaging system with dedicated lens and CCD. The laser coaxial imaging technology is used to ensure that the laser target point and the imaging target point are overlapped within the laser scanning range.
Imported image recognition software is used to achieve automatic image positioning through image matching.
(4)．Step-and-repeat mechanical motion platform
The imported precision linear motor system is adopted, and the grating ruler is closed-loop controlled. The movement precision is high and the speed is fast, which greatly improves the movement acceleration. It can realize convenient loading and unloading, and high-speed cyclic resistance adjustment of multiple unit circuits, which greatly improves production efficiency. Features high speed and high precision..
The resistance measurement adopts the method of four-wire system plus current measurement and voltage measurement. It has multiple high-precision constant current sources, and the corresponding range of each resistance can be automatically matched to obtain the best measurement accuracy. The resistance measurement generally uses the following probes Special probes for board soldering are used for measurement. The measurement system can be automatically calibrated by an external standard resistance board. Optional GPIB interface for external instrument control or measurement.
Electronic module function adjustment generally provides special probe measurement methods for product characteristics.
(6)．Laser focusing system
The laser focal length is directly controlled by the computer. By setting the focal length zero point and inputting the thickness of the workpiece, the focus can be automatically realized. This function can realize the resistance adjustment of different types of thick film resistor products, which improves the application range and efficiency of the laser resistance adjustment machine.
The movement of the probe is controlled by a high-speed motor, the running distance can be set arbitrarily, and the programming control function can be realized.
· Powerful application software based on WINDOWS platform.
·With the powerful software programming function in the industry, it can adapt to various resistance adjustment and function adjustment of electronic modules, and easily realize the special needs of customers and high automatic operation.
·Powerful database function, the entire production process is recorded and traceable.
·The software of unqualified products changes color and highlights the prompt function, which can effectively prevent unqualified products from flowing into the next process.
·The positioning coordinates are obtained in real time through the image, which is easy to operate and improves the positioning accuracy of the product.
·The multi-function measurement platform can be realized by programming, and it has the function of resistance measurement and sorting.
4.Main configuration of a single device
|serial No .||Part Name||Brand Specifications|
|1||End-Pumped Fiber-Coupled Solid-State Lasers||5W@10K|
|3||custom imaging lens||RONASMITH|
|4||Image recognition system||Belgium:EURESYS|
|6||step-and-repeat system||HIWIN Linear Motor 300*300|
|8||CCD coaxial monitoring||Wuhan Questt|
|9||Measurement control system||Wuhan Questt|
|10||Dedicated software system||Wuhan Questt|
|11||Industrial control computer||ADLINK|
|12||work platform||Granite for Micro-processing|
|13||Dust purification device||Shanghai|
|14||Negative pressure adsorption system||SMC|
|15||Probe Soldering Station||Wuhan Questt|
2．Laser beam positioning system
3. Image surveillance system
4. measuring system
Four-wire system, two-wire system computer program control
0.1Ω< Rx < 100Ω ±0.02% + 0.5% / Rx
100Ω< Rx < 100KΩ ±0.02%
100KΩ< Rx < 100MΩ ±0.02% + 0.05% * Rx
5. Computers and Software Systems
6. Step-and-repeat mechanical motion system
7. Other technical indicators