Aluminum printed circuit board has excellent electrical performance, heat dissipation, electromagnetic shielding, high dielectric strength and bending resistance. It is widely used in many industries, such as high-power LED lighting, power supply, TV backlight, automobile, computer, air conditioning frequency conversion module, avionics, telecommunications, health care, audio, etc. Even the most commonly used mobile phone camera,…
When the temperature rises to a certain area, the substrate will change from "glass state" to "rubber state", and the temperature at this time is called the glass transition temperature (TG) of the PCBs. In other words, TG is the maximum temperature (??) at which the substrate remains rigid. At high temperature, ordinary PCB substrate…
1. What is halogen free substrate According to jpca-es-01-2003 standard: the copper clad laminate with chlorine (Cl) and bromine (Br) content less than 0.09% wt (weight ratio) is defined as halogen-free copper clad laminate. (at the same time, total CI + br ≤ 0.15% [1500ppm]). 2. Why should halogen be banned Halogen refers to…
With the increasing complexity of electronic components and switches, faster signal flow is needed to improve the transmission frequency. Due to the short rise time of the electronic component pulse, it is necessary to regard the conductor width as the electronic component in high frequency technology. According to the different parameters, the high frequency signal…
With the service of 5g, the 5th generation mobile communication system, is expected to be provided in the future. In this trend, the multi-layer substrate materials, which play a central role in the servers and routers supporting the communication network backbone system, should be halogen-free PCB materials in addition to high-capacity and high-speed transmission. With…
The birth and development of FPC and PCB gave birth to the new product of rigid flex PCB. Therefore, the rigid flexible PCB is a circuit board with FPC characteristics and PCB characteristics formed by combining flexible FPC and rigid pcb together according to relevant process requirements through pressing and other processes. Because rigid flexible…
Answer: the quality of transmission lines for high-speed transmission and high-frequency signal transmission is much stricter than that of transmission wires. It is no longer "open / short circuit" test pass, or notch, burr does not exceed 20% of the line width. It must be required to measure the characteristic impedance value, and the impedance…
Antenna module is an indispensable module in almost all communication electronic equipment. A good antenna design scheme can not only make the equipment run more stable, but also is one of the important embodiment of equipment quality.Although the antenna design seems to be a small part, it is not easy to ensure the stability of…
Before introducing VIPPO, I want to divide the production process of vias into two parts: the first half is called “drilling”, and the second half is called “plug hole”. These holes include through holes, blind holes, buried holes, back drills, etc.; plug holes are the process of copper-plated plug holes, including full plugs, half plugs,…
Allegro PCB design – Gerber output settingsAdd photo drawing layer manually Output the photo drawing command in the menu manufacture = > artwork or click the toolbar icon. The open window is as follows: The above figure is the layer control window of photo output, and another window is the control window of output parameters. We can…
A Multilayer Flexible Printed Circuit Board (FPCB), often referred to as a flex PCB or flex circuit, is a specialized type of printed circuit board that offers flexibility and the ability to have multiple layers of conductive traces. It is designed to provide electrical connections while being highly flexible, making it suitable for applications where…
HASL (Hot Air Solder Leveling) is a metallic surface finishing technique, which is performed on the outermost layer of the PCB board to protect the exposed copper surfaces like tracks until the component placement and soldering is completed. The HASL coating is composed of Solder with 63% Tin and 37% Lead, and during the…
With the increasingly complex and high-speed circuit design, how to ensure the integrity of various signals (especially high-speed signals), that is to say, to ensure the signal quality, has become a difficult problem. At this time, the characteristic impedance matching of the control signal trace becomes the key. If the impedance control is not strict, it…
OSP, an abbreviation for Organic Solderability Preservative, it is a method for Printed circuit board Plating. It uses a water based organic compound that selectively bonds to copper and provides an organometallic layer that protects the Copper for Soldering. What's the difference between "μm" and "oz" for copper weight? 35μm=1oz, 70μm=2oz, and so on What's…
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In today’s world of modern technologies, we see high tech PCBA 2devices all around us, from our houses to our offices, workplaces, roads, marketplaces, education institutions everywhere we see modernization of technology and key to all these technologies is advancement in Electronics Industry. Day by day, scientist and engineers and working on advancements in micro-electronics,…
