With the increasing miniaturization of electronic products and the increasing integration of ICs and CPUs, the manufacturing industry is in urgent need of transformation and upgrading. The design of electronic products changes with each passing day, and intelligence and automation have also become the development trend of enterprises. Surface mount technology (SMT), as a new generation of electronic assembly technology, has developed rapidly in the past ten years and has a wide range of applications. It has penetrated into various industries and fields, and has partially or completely replaced the traditional in many fields. The circuit board through-hole insertion technology. The process can be roughly divided into: printing, patching, welding and testing (each process can be added to the inspection link to control the quality). With its own characteristics and advantages, SMT technology has caused fundamental and revolutionary changes in electronic assembly technology. According to the latest forecast of the Ministry of Industry and Information Technology, there will be hundreds of sets of SMT equipment in demand every year in the next few years, and SMT technology still has a strong momentum for development.
High-precision printing, the first pass of SMT production
SMT printing is the first process of a surface mount production line, and the quality of it has an extremely significant impact on the pass rate of SMT products. An important factor that affects the quality of solder paste printing is the motion control accuracy of each part of the printing machine. At present, the production of SMT products is developing in the direction of high yield and "zero defect". In production, the printing machine needs to be stable and uninterrupted for a long time. High-speed operation puts high demands on the speed, stability and reliability of its motion control system. The innovative technologies of large printing and assembly factories are constantly challenging the limits of quality and production efficiency.
DEK NeoHorizon 03iX from Advanced Assembly Systems Co., Ltd.
The world's leading SMT equipment supplier ASM Advanced Assembly System Co., Ltd. (2017 Munich Shanghai Electronic Production Equipment Exhibition, booth number: E3 Hall 3106) is a good example. Its DEK NeoHorizon iX printing platform can be used for any The product provides a powerful and highly accurate solution. DEK NeoHorizon Back-to-Back further enhances the concept of DEK dual-track printing. This simple and ingenious solution enables it to be transformed into two single-track machines at any time, protecting investment At the same time, respond to changes at any time.
At the same time, the modular structure of DEK NeoHorizon iX can also bring full flexibility, with the help of groundbreaking DEK HawkEye technology to improve process inspection. In addition, the DEK ProFlow ATx closed print head and DEK automatic solder paste replenishing device can greatly reduce manual operations and improve efficiency and cost. The new and efficient DEK Cyclone Duo stencil bottom cleaning system can minimize cleaning time and use of consumables.
Focus on SMT full-line production, SMT placement machine with high performance, high efficiency and high integration
The placement machine is a device used to achieve high-speed, high-precision, and fully automatic placement of components. It is related to the efficiency and accuracy of the SMT production line. It is the most critical equipment for the SMT production line and the highest technology and stability requirements. It often accounts for the entire More than half of the investment in the production line, its development trend can be summarized by "three highs and four modernizations", that is, high performance, high efficiency, high integration, flexibility, intelligence, green, and diversification.
Specifically, the SMT placement machine has undergone 3 generations of development, and has evolved from the early low speed (1-1.5 seconds/piece) and low precision (mechanical centering) to high speed (0.08 seconds/piece) and high precision (optical Automatic placement machine with centering accuracy ±60um/4q). The first-generation placement machine does not have visual identification devices, precise servo systems, automatic plate feeding and automatic nozzle change functions, only a stepping multi-axis system with low precision; the second-generation placement machine has visual identification functions, placement The number of heads has also been expanded from 2 to more. Automatic transmission and imported servo technology XY-axis system can also be imported; the third-generation placement machine has higher-level upgrades, such as device identification and placement optimization functions, and the Z-axis height is adopted Precise servo technology meets the requirements for thickness detection and replenishment of different devices and ICs, and high-precision placement. The third-generation placement machine is actually a precision industrial robot composed of computers, optics, precision machinery, and ball screws. , Linear guide, linear motor, harmonic drive, vacuum system and various sensors constitute mechatronics high-tech equipment.
Fuji Machine Manufacturing Co., Ltd.'s NXT-H placement machine
With the miniaturization and higher functionality of various electronic devices, the requirements for higher density and complexity in the mounting form are higher than today, especially for the mixed mounting of SMD and semiconductor. increase. In order to promote the reduction of production costs and shorten the delivery time, Fuji Machinery Manufacturing Co., Ltd. (2017 Munich Shanghai Electronic Production Equipment Exhibition, booth number: E3 Hall 3106) developed the NXT-H that combines the back-end semiconductor processes into the placement process. NXT-H achieves high productivity while having a high accuracy that greatly exceeds that of general placement machines. The placement accuracy is up to ±5μm and the production capacity is up to 24,900CPH. NXT-H inherits the concept of the NXT series with a cumulative number of 53,000 modules shipped. After modularization of each unit mainly for placement heads, it can be widely used for 4, 6, 8, 12 through the supply device MWU12i. With a wafer size of inches, the replacement module can mount up to 25 types of wafers with one machine.
High quality and green counterparts, SMT reflow soldering pays more attention to energy saving and environmental protection
SMT reflow soldering is a soldering method in which solder joints are formed by remelting the solder surface placed in advance, and no additional solder is added during the soldering process. The heating circuit inside the device heats air or nitrogen to a sufficiently high temperature. Blowing to the circuit board where the components are already attached, so that the solder on both sides of the components melts and then adheres to the motherboard has become the mainstream process of SMT. Most of the components on the board are soldered to the circuit board through this process.
However, the air quality is deteriorating day by day, and the environmental protection of SMT welding equipment is gradually being valued by more and more people. The VisionXP+Vac welding system of Reed Thermal Equipment (Dongguan) Co., Ltd. (2017 Munich Shanghai Electronic Production Equipment Exhibition, Booth No.: E3 Hall 3106) adopts the concept of energy saving and environmental protection in line with current trends, and combines high-quality sustainable production with modern Combining the needs of the manufacturing industry, it pays special attention to factors such as high energy efficiency, low emissions and lowest cost in the research and development process, and it is a high-efficiency energy saving assistant. The system is equipped with a brand-new vacuum module unit, which can realize vacuum reflow soldering in one step, directly and effectively solving the problems of pores, voids and voids after soldering (when the solder is in the best melting state): 2mbar vacuum can reduce the void rate To less than 2%. The VisionXP+Vac vacuum unit module adopts a detachable design, so it can also be used in a non-vacuum reflow soldering process to flexibly match different production requirements.
VisionXP+Vac Welding System from Reed Thermal Equipment Co., Ltd.
Quality control testing, SMT "smart" manufacturing is indispensable!
In recent years, the rise of various types of smart terminal devices (such as smart phones and Pads) has resulted in the miniaturization of packaging and high-density assembly, as well as various new packaging technologies that are becoming more refined, and the requirements for circuit assembly quality are becoming higher and higher. Compared with first-piece inspection methods such as manual visual inspection, automatic optical inspection, ICT needle bed test, and functional test (FCT), X-RAY inspection technology has more advantages and is widely used in SMT, LED, BGA, CSP flip-chip Chip inspection, semiconductor, packaging components, lithium battery industry, electronic components, auto parts, photovoltaic industry, aluminum die casting, molded plastic, ceramic products and other special industries.
All X-RAY inspection equipment, whether it is a two-dimensional or three-dimensional system, is basically an X-ray projection microscope, which can improve the inspection system, increase the "one pass rate" and strive for the goal of "zero defect" , Especially SMT first article inspection can find the factors that affect product quality in the production process as soon as possible, and prevent batch defects or scrap.
The LX2000 inspection equipment launched by UFJ (2017 Munich Shanghai Electronics Manufacturing Equipment Exhibition, Booth No. 3702, Hall E3) is an online X-Ray inspection system with high efficiency, large inspection area and high resolution, which can effectively guarantee welding Quality, as well as CX6000 components automatic counting X-RAY, desktop economical CX3000 X-RAY. A major technological innovation point of UFJ’s LX2000 online intelligent inspection equipment. In addition to innovative features such as ultra-flexible software interface, automatic programming inspection and defect identification, the equipment also has defective products that can be automatically judged and picked, equipped with maintenance workstations, and will be inspected. The data fed back to the front-end manufacturing process to achieve closed-loop process improvement and won the 2016 "China SMT Innovation Achievement Award".