博文

Material selection of avionics PCB

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  Aerospace electronics requirements C ircuit boards   are almost everywhere in all equipment s , machinery,  and vehicles used today. Broadly speaking, we can classify these systems as business systems or critical systems. Commercial systems include cellular phones, computers, televisions and household appliances. The critical system is a system with more stringent requirements, because failures may lead to terrible consequences and even loss of life. The PCBs that make up these critical systems usually have to withstand higher performance standards, such as IPC-6011, which requires uninterrupted service for Class 3 high-reliability electronic products. The board used in the avionics system must comply with the regulations. IPC-6012DS Space and military avionics application appendix of IPC-6012D, qualification and performance specifications for rigid printed boards or IPC-6013D flexible/rigid-flex printed boards. In addition to these regulations and standards, the develo...

Aviation PCB design and layout

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  Aerospace PCB  manufacturing requires materials that can withstand large amounts of vibration, extreme temperatures, and other harsh conditions. Certain aviation PCBs even need to be able to operate in space and must be very durable. Plates made of lightweight materials such as aluminum can also be used in aerospace. Anodized aluminum can be used to improve oxidation resistance. Printed Aviation Circuit Board For beginners, their design must be more powerful, which requires specific layout and design techniques. Making circuit boards for airplanes is a difficult and time-consuming task. Pay special attention to the thermal management of the PCB, while considering the special design and layout techniques of high-frequency RF components. Therefore, in order to manufacture printed circuit boards for aerospace equipment, basic design and layout must be considered to make them more superior. This means that the designer must define the correct  board material , specify preci...

HDI PCB in medical equipment

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  In the past few decades, PCB size has become smaller and smaller, and  PCB engineers   have more reasons to use  HDI PCB   than ever before. Why is high-density board important to medical technology? Medical equipment must meet the highest standards, which means the best technology currently available. The quality of life is also problematic-the less invasive and invasive the device, the earlier the patient will use it. When we look at implants, the most cutting-edge technology needs in the design of medical electronic devices are most obvious. For example, pacemakers need to be small, light and reliable. High-speed transmission in HDI PCBs is ideal for medical devices, where device response time can mean life or death. The demand for smaller circuit boards and better performance results in HDI PCBs requiring more components to be placed on each side of the original circuit board. It needs to be in a smaller space, so that the signal transmission speed is fast...

The challenge of 5G communication to PCB technology

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  5G communication is a huge and complex integrated technology, and its challenges to the  PCB process   are mainly focused on: large size, multilayer, high frequency, high speed, low loss, high density, rigid-flex combination, high and low frequency mixed pressure, etc. So many process technologies put forward new or higher requirements for PCB materials, design, processing, and quality control. PCB companies need to understand the changing needs and propose comprehensive solutions. Material requirements:   A very clear direction for  5G PCB   is high-frequency and high-speed materials. In terms of high-frequency materials, it can be clearly seen that the leading  PCB material   manufacturers in the traditional high-speed field in China have begun to deploy high-frequency plates and introduced a series of new materials. This will break the current dominance of foreign brands in the high-frequency sheet industry. After healthy competition, the per...

Ways to reduce PCB cost

As PCB design   is more and more commonly used with existing development boards, and daughter boards are used to drive hydraulic devices and servo motors or perform tasks based on light, motion, and sound, the trend of PCB design gradually tends to open source hardware models and Control System. After completing the product and printed circuit board design , you need to start building prototypes before mass production of PCBs. Several PCB design software packages, such as printed circuit board layout design tools and individual design tools, have simulation capabilities. Doing so can minimize the number of design errors before building the main PCB prototype. If you are designing a complex project, you may need to consider a modular design in which all the main functions are located in separate modules. During the inspection, modules that do not meet the design constraints can be exchanged. Rotating a single module is faster and more efficient than rotating the entire design. All o...

What is a resin plug hole

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  In recent years, resin plug holes   have beco me  very popular in the  PCB industry   and have a wide range of applications.  Especially  some products with high layers and thick boards have a higher use rate of resin plug holes. So what is a resin plug hole? What are the benefits?   What is a resin plug hole?   With the continuous change and reform of electronic chip structure and design methods, circuit board modules have also undergone great changes. With the change of modules, the problem of green oil plugging in electronic chips has deeply troubled many  smt  processing manufacturers . In order to solve this problem, many  pcb engineers   have put in research efforts until the 1990s,  a Japanese  pcb manufacturer   invented resin, which can plug this kind of hole, and then plate copper on the surface, which can solve the problem of blowing in the hole caused by the green oil plug hole. However, the te...

The hazards of using expired PCB

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  1. Expired PCB may cause oxidation of the solder pad on the PCB surface Oxidation of the soldering pad will cause poor soldering, which may eventually lead to the failure of the PCB function or the risk of dropping parts. Different surface treatments of  circuit boards  will have different anti-oxidation effects. In principle,  ENIG  requires it to be used up within 12 months, while  OSP  requires it to be used up within six months. It is recommended to follow the shelf life of the PCB board factory. OSP boards can generally be sent back to the board factory to wash off the OSP film and re-apply a new layer of OSP, but there is a chance that the copper foil circuit will be damaged when the OSP is removed by pickling, so it is best to contact the board factory to confirm whether the OSP film can be reprocessed. ENIG boards cannot be reprocessed. Generally, it is recommended to perform "press-baking" and then test whether there is any problem with the ...