About Us
About Us
About Us
About Us
11

Years of experience

About Us

Xianglong(shenzhen)
Xianglong (Shenzhen) Electronic Technology Co., Ltd. was established in 2010, with a factory area of 30,00 square meters,200 employees, located in Shenzhen, Guangdong, China. Our company is mainly engaged in the development, design, production and assembly of PCB. Our products are used in communication equipment, medical equipment, automotive electronics, smart home and security equipment. Provide customers with high-quality products , fast and on-time delivery services. And have professional technical consultant to provide you with reply on your doubt and problem at any time. We have advanced technology and equipment, from design review to manufacturing, to quality control and testing. You can rely on our professional manufacturing and sales team with more than 10 years of experience in the electronics industry to produce your products. Leave it to us. 85% of our products are sold overseas, exported to Europe, America, Asia and other countries. If you want to know more about us and what we can do to help solve your specific PCB and PCBA assembly needs, please contact us instant messenger or call (+86)0755-2322 6243 free of charge. We are warmly and patiently to communicate with you, win your business by demonstrating our capabilities, and by providing reliable, fair-cost and long-term partnerships. Hope you can become our important customer.
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More than
More than
100
+
Employes
Export to The World
Export to The World
200
+
Countries
The factory area
The factory area
3000
square meters
Our Advantage

XiangLong (Shenzhen) Electronic Technology Co., Ltd. can provides EMS, including but not limited to the following services, PCB design, PCB layout, PCB prototype, BOM fabrication , PCB inspection and PCB assembly.

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Why use automatic optical inspection assembly
Oct 22, 2021 Why use automatic optical inspection assembly
Automatic optical inspection equipment is already a must in every electronic factory, and it is constantly being enhanced and updated to improve its capabilities. This inspection equipment is used in many industries, including printed circuit board manufacturing, bare board inspection, solder paste printing, and assembly. For PCB assembly, the AOI system will check the placement and soldering of the components, and feedback potential problems in the test to our operators. From wrong parts to bad welded connections. The automatic optical inspection (AOI) system will check your PCBA. The system can quickly evaluate thousands of details that cannot be captured by the naked eye, and feedback any detected problems to the operator. AOI PCB inspection equipment relies on high-resolution camera systems and different lighting sources, such as fluorescent, LED, ultraviolet, and infrared, to capture a series of images. These images are processed by the system, which is programmed to inspect different details of the assembled board. The AOI system will scan each assembly board and compare these images with the images of the standard board stored in the file. When it finds inconsistencies with the standard board, it will mark these areas as possible defects so that technicians can inspect them in more detail. This will better ensure product quality.
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What is the PCB metal edging?
Aug 12, 2021 What is the PCB metal edging?
There are 2 types of printed circuit boards for PCB circuit boards, one with non-metallic edges and the other with metalized edges. In the past, there was not much demand for PCBs with metal edges, and now there are more customer demands. Higher-quality printed circuit board metal edges have attracted more attention because it enhances the functionality of several products that use these printed circuit boards. With the miniaturization and high-speed operation of circuits, the timing and signal integrity of digital signals have become prominent issues. In addition, due to the integrity of the power supply, the medium and high speed digital signals in the system will cause electromagnetic interference and electromagnetic compatibility problems. High-speed digital signals will not only cause serious interference inside the system, but also radiate to the outside of the system, causing the equipment to exceed the safety limit standards. The side-board radiation of a multilayer PCB is a relatively common source of electromagnetic radiation. The current-carrying power layer and ground layer will generate electromagnetic radiation at its edges. Due to insufficient power supply bypass, most of the noise comes from stray currents in the power and ground planes. At high frequencies, vias act as stubs and may have high inductance. This kind of through hole can radiate the magnetic field between the layers of the circuit board, and finally gather at the edge. The PCB board metallization edge process uses metal to surround the entire board edge. This will short-circuit the high-frequency signals reaching the edge of the circuit board and prevent them from radiating. Although this improves the performance of the circuit board, the edge metallization process increases the cost of the printed circuit board.
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What is different between FPC(Flexible printed circuit board) and FFC(Flexible Flat Cable)?
Jul 24, 2021 What is different between FPC(Flexible printed circuit board) and FFC(Flexible Flat Cable)?
1. Different materials: FFC is composed of PET insulation material and extremely thin tinned flat copper wire. FPC is composed of copper foil, acrylic & epoxy resin thermosetting  adhesive and Polyimide film. 2. Different manufacturing methods: FPC processes the flexible copper clad foil by chemical etching to obtain flexible circuit boards with different shapes of single-sided or double-sided and multi-layer structures.FFC is a flat copper foil sandwiched between the upper and lower insulating foil films, which are pressed together through the production line of high-tech automated equipment. The finished product is simpler and thicker. 3. Different applications: FPC can carry out impedance control, anti-static interference, designed to have bending and angle, commonly used in FPC antennas, FPC touch screens, FPC capacitive screens, notebooks, SLR cameras, smart phones, wearable devices, automotive electronics, medical equipment, industrial control equipment, Military equipment, sensors, antennas and other modern electronic products. FFC is easy to solve electromagnetic shielding (EMI). It is often used in the connection between the print head of the printer and the motherboard, plotters, scanners, copiers, audio, LCD appliances, fax machines, various DVD players, etc., PCB board to PCB board It is used as data transmission cable in miniaturized electrical equipment.
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The meaning of PCB board for graphics card
Jul 12, 2021 The meaning of PCB board for graphics card
The graphics board refers to the PCB circuit board on the graphics card. It can also be called the graphics card motherboard, because the graphics card is composed of a heat sink + GPU + video memory + circuit board + other components. The components of the graphics card are all placed on the PCB board. Good or bad, directly determines the quality and stability of the electrical performance of the graphics card. The PCB board is the basis of the graphics card. The more PCB layers, the more complex the design, the more precise the workmanship, and the better the overclocking and stability. The PCB board not only supports the components of the entire graphics card, but also plays a vital role in the stability of the graphics card. It is the soul of the quality of the graphics card. At present, motherboards and graphics cards mostly use multi-layer boards, which greatly increases the area that can be wired. However, based on cost considerations, six-layer or four-layer board designs are generally used, and only a small number of high-end graphics cards use eight-layer board designs. With the gradual maturity of the current PCB industry, the GPU industry is bound to usher in new developments.
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Why does PCB have a craft edge?
Jul 07, 2021 Why does PCB have a craft edge?
In the process of SMT patch processing, the PCB is completed by track transmission. The PCB board needs to be fixed during track transmission. Conventional equipment uses the splint method and there should be no components and parts in the clamped range and the crawler range. Lead interference, otherwise it will affect the normal transmission of the PCB board due to the inability to clamp and fix, or reduce the work efficiency due to the collision of the patch parts and the equipment too close. Therefore, it is necessary to add some blank areas on both or four sides of the PCB as process edges, reserve a safe distance, and expand the space from the patch parts in the PCB to the edge of the board to assist PCB production and processing. The reserved width of the craft side is generally recommended to be 5.0mm.   However, not all PCB boards need to add process edges. If the space between the patch parts in the PCB board and the board edge is large enough and not within the crawler range, there is no need to add additional process edges.
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