SMD surface mount device welding process and packaging form

With the rapid development of intelligent electronic equipment and process technology, the requirements for the integration of microelectronic systems are becoming higher and higher. Surface mount devices have become the current mainstream electronic assembly technology due to their small size, light weight and high power.

SMD PCBA board - SMD PCB assembly

Now fumax will take you to share more about surface mount devices.

  1. What is surface mount device packaging? What is the abbreviation of surface mount device packaging?
    The abbreviation of surface mount device package is SMD.
    Surface mount device SMD (Surface Mount Device) packaging is to attach electronic components directly to the substrate, that is, the chip component is packaged and placed on the printed circuit board, and a reflow oven is used to melt the solder alloy for interconnection of the electronic system to realize the chip component. The main technology for interconnecting with the substrate.
  2. The most basic installation and use process of SMD surface mount devices mainly includes the following steps:

Install the base plate: Fix the base plate on the table

Dot paste or glue: According to the size of the component, apply the patch glue to the predetermined position. If the assembly process uses reflow soldering, you need to apply paste on the substrate pad. Currently, medium-high temperature grade Sn- Ag solder paste.

Installing SMD: Generally, an automated professional placement machine is used, which mainly includes: suction head for picking and placing SMD, X-Y workbench, program control system and feeding part.

SMD surface mount device welding process and packaging form

Thermal curing: It is carried out after dispensing and patching, and the glue is cured through a curing oven under certain temperature and time control. , thereby improving the bonding strength of SMD and preventing components from being displaced due to vibration and impact during storage and transportation.

SMD welding: Wave soldering using patch adhesive bonding and reflow soldering using solder paste bonding.

SMD surface mount device welding process and packaging form

Cleaning: Remove residual adhesive to prevent corrosion of the substrate.

Inspection and Testing: Solderability is inspected according to standards and testing requirements.

  1. Common surface mount device package sizes
    Common SMD mounting methods are divided into four types: SO mounting, QFP mounting, LCCC mounting and PLCC mounting.
    (1) SO mounting is divided into SOP mounting and SOL mounting, using wing-shaped electrode pin shapes, with pin spacings of 1.27mm, 1.0 mm, 0.8mm, 0.65mm and 0.5mm.
    (2) The PQFP mounting rectangle has wing-shaped electrode pins on all four sides, with a thickness of 1.0mm or 0.5mm. Chips packaged in QFP are generally large-scale integrated circuits, with the number of electrode pins ranging from 20 to 400. The minimum pin spacing is 0.4mm, and the maximum
    is 1.27mm.
    (3) LCCC mounting is a kind of mounting without pins. The chip is mounted on the ceramic carrier. The leadless electrode soldering terminals are arranged on the four sides of the bottom surface of the mounting. The number of electrode pins is 18~156. The spacing is 1.27mm.
    (4) PLCC mounting is a rectangular mounting of integrated circuits. Its pins are hooked inward. The number of electrode pins is 16 to 84, and the spacing is 1.27mm.
  2. Device package appearance

Top 11 surface mount device service manufacturers in China

What surface mount device service manufacturers are there in China? In China, there are many surface mount device service manufacturers. These manufacturers provide manufacturing and assembly services for a variety of surface mount devices, including quartz crystal resonators, oscillators, filters, etc.
fumax PCB assembly manufacturer is a one-stop service provider in Shenzhen, China, which provides customized circuit board PCBA design and development, SMT patching, DIP welding, assembly testing, software programming, SMD packaging, component procurement, and painting.
Fumax company supports OEM/ODM service.

SMD surface mount device - SMD factory

The following are the major surface mount device service manufacturers in China provided by fumax PCB assembly manufacturers:

  1. Shenzhen Fumax Technology Co., Ltd.
    Founded in 2007, it is located in Shenzhen, Guangdong Province. fumax is equipped with high-precision imported equipment, including fully automatic solder paste printing machines, SPI, multiple high- and medium-speed placement machines, 10 temperature zone reflow soldering, wave soldering, selective wave soldering, X-Ray detection, AOI equipment, automatic Soldering machine and so on.
    Specializing in PCB assembly, SMD assembly, PCB custom design, PCB assembly customization, SMT patch processing, SMT patch processing, DIP plug-in processing, and electronic component procurement. International PCB and PCB assembly design, SMT patch processing and other international trade services.
    The main production types are computer motherboards, TVs, graphics cards, network cards, cameras, wireless modules, radio products, mobile hard drives, sound cards, MODEM, industrial control and medical instrument boards, switches, optoelectronic products (small spacing), communication boards, MID ( Tablet computers), smart furniture, smart wearables and other products provide PCB and PCBA services.
  2. Shenzhen Jiashengda Electronics Co., Ltd.
    Shenzhen Jiashengda Electronics Co., Ltd. provides patch assembly services. They specialize in electronic component sales and technical consulting, including the purchase and sale of capacitors, resistors, magnetic materials, electronic components, electronic components and related materials.
  3. Shenzhen Chuangxiang Electronics Co., Ltd.
    Shenzhen Chuangxiang Electronics Co., Ltd. also provides patch assembly services. They not only have professional and skilled processing workers, but also have high-precision and high-efficiency patch production lines, which can provide customers with one-stop service from design to production.
  4. Shenzhen Huazhicai Electronics Co., Ltd.
    Shenzhen Huazhicai Electronics Co., Ltd. is a processing enterprise specializing in SMT patch processing, SMT patch processing, DIP plug-in processing and assembly. The company has fully automatic SMT production lines and semi-automatic production lines, which can process small components such as 0603 and 0402 and high-density chip components such as BGA. At the same time, the company also has a complete quality inspection system and can provide customers with a full range of quality inspection services.
    Huazhicai Electronics’ patch assembly services include one-stop services from design to production. They can customize production according to customer requirements and strictly conduct quality control in accordance with IPC-A-610C standards. In addition, they also provide SMT steel mesh production, silk screen printing, material purchasing and other services.
  5. Shenzhen Xinchuangyuan Electronics Co., Ltd.
    Shenzhen Xinchuangyuan Electronics Co., Ltd. provides sales of electronic components, sales of integrated circuits, sales of optoelectronic devices, sales of semiconductor lighting devices, sales of semiconductor discrete devices, sales of solar thermal power generation products, sales of communication equipment, sales of mechanical and electrical equipment, and refrigeration and air-conditioning equipment. Manufacturing and sales, civil aviation materials sales and other businesses.
  6. Shenzhen Honglida Electronics Co., Ltd.
    Shenzhen Honglida Electronics Co., Ltd. provides PCB assembly services. They can carry out customized production according to customer requirements and strictly conduct quality control in accordance with IPC-A-610C standards. In addition, they also provide SMT steel mesh production, silk screen printing, material purchasing and other services.
  7. Shenzhen SMIC Microelectronics Co., Ltd.
    Shenzhen SMIC Microelectronics Co., Ltd. is a limited liability company specializing in electronic component sales and technical consulting. It was established in 2007 and is located in Shenzhen, Guangdong Province. The company’s paid-in capital is RMB 3 million, and its registered capital is RMB 5 million.
  8. Shenzhen Huazhicai Electronics Co., Ltd.
    Shenzhen Huazhicai Electronics Co., Ltd. provides PCB assembly services. PCB (Printed Circuit Board) is the abbreviation of printed circuit board. It is a support for electronic components and a provider of circuit connections for electronic components. It is made with electronic printing technology, so it is called a “printed” circuit board.
    PCB assembly refers to soldering electronic components to PCB boards to achieve specific functions and circuit connections. PCB assembly is a very important part of electronic product manufacturing, which directly affects the quality, performance and reliability of the product.
    Huazhicai Electronics’ PCB assembly services include one-stop services from design to production. They can carry out customized production according to customer requirements and strictly conduct quality control in accordance with IPC-A-610C standards. In addition, they also provide SMT steel mesh production, silk screen printing, material purchasing and other services.
  9. Shenzhen Xingweitong Electronics Co., Ltd.
    Shenzhen Xingweitong Electronics Co., Ltd. provides SMD assembly services. SMD (Surface Mounted Devices) is a surface mount device that is widely used in the manufacturing of electronic products. SMD assembly is a manufacturing process in which SMD devices are pasted onto a PCB board and fixed using a welding process.
    Xingweitong Electronics’ SMD assembly services include one-stop services from design to production. They can carry out customized production according to customer requirements and strictly conduct quality control in accordance with IPC-A-610C standards. In addition, they also provide SMT steel mesh production, silk screen printing, material purchasing and other services.
  10. Shenzhen Furitai Electronics Co., Ltd.
    Shenzhen Furitai Electronics Co., Ltd. is a high-tech enterprise specializing in the R&D, production and sales of SMD electronic components. The company has advanced production equipment, testing equipment and a professional technical team, and is committed to providing customers with high-quality SMD electronic components and solutions.
    SMD (Surface Mounted Devices) is a surface mount device that is widely used in the manufacturing of electronic products. Furitai Electronics’ SMD products cover a variety of types, including SMD resistors, SMD capacitors, SMD diodes, SMD transistors, etc. These products have the advantages of miniaturization, high precision, and high reliability, and are suitable for use in various electronic products, such as consumer electronics, communication equipment, automotive electronics and other fields.
    Furitai Electronics’ SMD production line has a fully automatic production line and an advanced quality inspection system, which can realize automated production and online inspection to ensure that every product meets quality requirements. At the same time, the company also has a professional technical team to provide customers with a full range of technical support and solutions to help customers improve production efficiency and reduce costs.
  11. Shenzhen Licheng Microelectronics Technology Co., Ltd.
    Shenzhen Licheng Microelectronics Technology Co., Ltd. is a national high-tech enterprise focusing on the research, development, production and sales of integrated circuits and discrete devices. The company has advanced production equipment, testing equipment and a professional technical team, and is committed to providing customers with high-quality integrated circuits and discrete devices and solutions.
    Licheng Microelectronics’ products cover a variety of types, including power management chips, LED driver chips, MOS tubes, diodes and triodes, etc. These products have the advantages of high efficiency, stability and safety, and are suitable for use in various electronic products, such as power supplies, lighting, home appliances and other fields.
    Licheng Microelectronics’ production bases are located in Shenzhen and Suzhou. They have advanced production lines and strict quality control systems to ensure that every product meets quality requirements. At the same time, the company also has a professional technical team to provide customers with a full range of technical support and solutions to help customers improve production efficiency and reduce costs.
    Licheng Microelectronics has always adhered to the business philosophy of “market-oriented, customer-centered”, adhering to the corporate spirit of “integrity, professionalism, innovation, and win-win”, and is committed to becoming the world’s leading supplier of integrated circuits and discrete devices.
surface mount printed circuit board assemblies

These manufacturers usually provide comprehensive surface mount device manufacturing services, including design, manufacturing, assembly and testing.

SMD PCB manufacturer in China - SMD factory

In addition, these manufacturers also provide inventory management and logistics distribution services for various surface mount devices. If you need more information about these manufacturers, it is recommended to search the Internet or contact a local surface mount device service manufacturer to obtain detailed information.

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