• What is wave soldering?

    Wave soldering is to make the solder side of the PCB directly contact with high temperature liquid tin for welding purposes,its high temperature liquid tin maintains an inclined surface, and a special device makes liquid tin form a wavy phenomenon, so it is called “wave soldering”,its main material is soldering tin bar. Wave soldering is currently the most commonly used and effective method, wave soldering system has a large enough tin can handle the maximum circuit board width you expect.Wave soldering is suitable for medium batch or large quantity welding. Advantage:...

  • The advantage of robot in PCB industry

    The advantage of robot in PCB industry Like the automobile industry and other manufacturing industries, industrial robots have brought many advantages to enterprises in the PCB industry. 1.Reduce the use of work, speed up the pace of work, improve work efficiency. 2.Improve operation precision and product quality. 3.To avoid the potential threat to the health and safety of workers from the operating environment and save the investment in environmental safety. 4.Reduce the loss of efficiency, quality and accident rate caused by repeated and boring processes...

  • Why PCB Design Software is Proving So Vital to Modern Circuit Board Ingenuity

    Printed circuit board (PCB) design software is a remarkable tool when it comes to designing PCB for electronic devices. By using the PCB design software, an engineer not only addresses issues associated with power integrity and signal, but is also able to modify and improve the entire circuit structure. PCB design software can be easily integrated with other associated plugin PLM software that can assist engineers to better analyze layouts and designs of PCBs. In recent years, the demand for PCB design software from the electronics manufacturing industry has been robust. According to the latest data released by Future Market Insights (FMI), the global market for PCB design software is set to witness a CAGR of more than 12% between 2016 and 2026 to rake in $4,755.1 million in revenues by the end of the forecast period. Needless to say, PCB design software eliminates issues faster and significantly reduces circuit......

  • The veteran’s answer about Crystal Oscillator (Part one)

    Someone who has just started to join in Electronic Industry,they often faced the questions about Crystal Oscillator,even they have researched a lot of resources from refernce books or internet,but many of them are still in confusion. Today I share with you some typical questions and answers from the veteran electronic engineer. What’s the fonction of Crystal Oscillator? The main fonction is providing a clock signal for the whole system. For example,the run model of CPU is step by step,every step defined an instruction that base on Crystal Oscillator. What’s the relation between Crystal Oscillator and timing sequence? Timing sequence is counted on the clock’s order,and the clock is generated by a Crystal Oscillator. Why we often set some different Crystal Oscillator on the same PCB? Evey different CPU or Chip has different frequencies,they need matched Crystal Oscillator to run. For example,USB1.1 needs 48MHz clock to be divided, so 12MHz crystal......

  • The veteran’s answer about Crystal Oscillator (Part two)

    USB1.1 needs 48MHz clock to be divided, so 12MHz crystal oscillator is required, and the frequency is 4 times that of 48MHz. Why don’t choose 48MHz Crystal Oscillator directly? Because high frequency crystal oscillator is easy to be affected by peripheral circuits or affect peripheral circuits. Most of the time,we get high frequency by using low frequency crystal oscillator with second harmonic generation. But it’s not absolute,many circuits is often used a crystal oscillator of 50M or more. That’s a key point that we need a special attention when we do PCB layout.   Why we use 32.768KHz crystal oscillator when the RTC clock needs a more accurate 1S (1 second)? Because all digital circuits are expressed by binary system,32768 is 1000000000000000 in binary system. So as long as we detect the highest bit changes, we will know that 1 second, don’t need to check every bit, the circuit is......

The merits and demerits of common surface treatment in PCB industry(HAL and LFHAL)

With the continuous improvement of the living environment, the environmental issues involved in PCB production are getting more and more attention,especially Lead and Bromine. The basic purpose of PCB surface treatment is to ensure good weldability and electrical performance.Because the copper is unlikely to remain the original for a long time exposed in the air, so the copper surface needs to be treated to avoid oxidized. Now there are many PCB surface treatment typies application, the common typies are HAL/LF-HAL, OSP, flsh gold, hard gold, immersion tin, immersion silver,ENEPIG and so on. Let's check them out! 1.Hot air level and Lead free hot air level The general process of HAL/LF-HAL process is: microerosion --- preheating --- coating flux --- HAL/LF-HAL --- cleaning. Hot air leveling is the process of coating molten tin solder on PCB surface and heating compressed air,to form a coating of both anti-oxidation and good weldable on the copper surface. HAL/LF-HAL is divided into two types: vertical and horizontal. Generally, it is considered...

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A new type of headset that can read the ideas from your brain

The voice technology has always had a prominent problem:you will feel a bit strange with yourself when you talk to someone.However,the technology is continue rising under the people's demands,people have less self-awareness of their machines when they in conversations.  Any non-language device is an inevitable trend,it accomplishes work in a similar manner,but not in dialogues.A team of Massachusetts Institute of Technology has been studying such a device,but we must admit that hardware design does not completely remove the entire self-awareness.  AlterEgo is a head-worn or jaw-mounted device that could read neuromuscular signals through a built-in electrode.As MIT said,this hardware can read the ideas from people's brain.  Master Arnav Kapur said in an interview:"The initial motivation for this idea is to create an IA device——an intelligent enhancement device.Our idea is that Is it possible to have an internal computing platform that can connect humans and computers in some ways and let us feel like an internal extension of our own ideas?"...

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Layer stack-up design tutorial

Since Shenzhen Renchuangyi Electronic Co., Ltd(shourt name RCYPCB) always offers Multilayers PCB service,many of customers usually ask us how to design a suitable layer stack-up for the boards. We think that it is time to write a tutorial for layer stack-up design. Firstly,we will expound what the layer stack-up is. The high speed development of electronics has been promoted the PCBs towards to micromation,light weight, high frequency and longer lifetime, which results in the prevalent trend of multilayer PCBs,so it leads out the concept of stack-up. Layer stack-up refers to the arrangement of signal layers,prepreg layers and base core that make up a construction of PCB layout design. A construction of PCB stack-up design bring to many advantages: 1)A suitable layer stack-up can help customer optimize their product's external noise and reduce resistance. 2)A suitable layer stack-up can also help customer to save costs and improve production efficiency. 3)A suitable layer stack-up can reduce electromagnetic interference of customers' design as...

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PCB factory Trident Q2 revenue hits a new high record

Thailand's second largest PCB maker Trident publishes announcement in June, new orders and new customers continue to inject, coupled with ongoing new pcb factory capacity out, monthly revenue soared high, reaching 641 million yuan, the monthly increase 5.6% annual growth of 25.2%, the new high record for single month, the cumulative second quarter revenue will be 1.835 billion yuan, also simultaneously record high single quarter, annual growth of 12.1% to the current growth rate, the third quarter coupled with traditional season, the third quarter is expected to challenge corporate estimated monthly and single-season high, full-year revenue growth of more than 20 percent. Currently Trident has received huge orders from Japanese consumer customers, most of them are 6 and above layers PCB, and begin to ship this season, inject new growth momentum, in addition to the existing product line of new customers, with the third quarter traditional shipping season, for the third quarter have the opportunity to climb. The last major shipping customers...

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Flex PCB & Rigid-flex PCB

Flexible PCB or FPC is a patterned arrangement of printed circuitry and components that utilizes flexible based material with or without flexible coverlay. These flexible electronic assemblies may be fabricated using the same components used for rigid printed circuit boards, but allowing the board to conform to a desired shape (flex) during its application. Rigid-flex PCB are the electronic boards using a combination of flexible and rigid PCB board technologies in an application, Most rigid flex PCB consist of multiple layers of flexible circuit substrates attached to one or more rigid boards externally and/or internally, depending upon the design of the application. Rigid flex design doesn't just maximize space and weight but greatly improves reliability. Flexible circuit and Rigid flex circuit are used extensively in applications and industries including: ● Communicatio ● Industrial ● Consumer Electronic ● Aerospace ● Automotive ● Military ● Medical ● Transportatio With a large number of investments on the facilities of flexible printed circuit board and continuously innovating the flexible circuit board manufacturing technology, Our Flex...

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Application of Plasma Surface Pretreatment in PCB Manufacture Process

China plays an important role in the PCB manufacturing in the word. In recent years, the global status of PCB manufacting has a tremendous change, and most PCB manufacturing has transferred to Asia,especially China. China has become to a main PCB supplier of the word. In the premise that electronic products tend to be more complex,the precision and quality requirements of PCB are also more strict. With the popularization of Plasma surface treatment technology, the PCB manufacturing technology has been innovated greatly.The main functions of Plasma are as following: Hole wall erosion,scraps removing. Plasma is good for obtaining a better roughness of the hole wall and helpful for the metallization of the hole. PTFE material activation treatment. Plasma is easy to operate and keep stable/reliable quality,it's suitable for mass production very much. Carbide removing. Plasma is useful to remove drilling dirts,especially for comolex resin material and micro via. The Carbide is produced by laser drilling,it must be removed before the hole metallization process. The plasma treatment...

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How to handle surplus or failed plating additives?

Many of plating liquid are appended with additives,they will produce any analyte when the time out, it is bad for the plating,so we must be cleaned the plating tanks in a fixed cycle. If the pating surface is too light,the dispersion ability is often not so good,and it's easy to cause surface peel off,even caused broken when under the high voltage. Some operators did what they did according to the process requirements, but they did not catch the key point. The key point should be treated with hydrogen peroxide first, then heated(not heating the plating liquid first), and then added with any activated carbide. When there are many organic impurities, potassium permanganate is used for treatment. At this time should adjust the pH value of 3, and then heated to 60 ~ 80 °C, add the previously dissolved potassium permanganate, the amount of 0.3 ~ 1.59 / L or less, after stirring for more than 8h, filtered and adjusted The pH...

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How to solve the cycle watermarks around the plating hole?

Phenomenon: Single side or double side,every hole,hole's periphery,watermark,likes any water remain after naturally dried. Possible reason and solution: Some people called this phenomenon as fisheye,this phenomenon is in relation to the Chlorine content. If there is absolute watermark,it maybe apply for an imperfect water clean before baking,the remained water in the holes were very easy to flow on the copper surface,so the watermark arose in the baking process. This phenomenon is particularly likely to occur with small holes or deep holes. The water marks should be teardrops rather than concentric circles, and the edge hole will also have some traces of floating water droplets caused by drying. This phenomenon will be improved by washing.   China PCB manufacturer factory supplier, printed circuit board, rigid PCB, flex-rigid PCB, Asia PCB,Chinese PCB, China PCB-Fabrik,Китайская фабрика печатных плат, Kiina PCB-tehdas, China fábrica de PCB,Çin PCB fabrikası, סין מפעל PCB ...

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Impedance matching in hi-tech PCB

The electronics engineers often encounter impedance matching problems. What the impedance matching is and why we do impedance matching? This article takes you to find out! In electronics, the blocking effect on the circuit is often referred to as impedance. Impedance's unit is ohms, commonly referred to as Z,Z= R+i[ωL–1/(ωC)]. Impedance could adjust the load power and suppress signal reflection. There are two main methods for impedance matching. One is to change the resistance of the group and the other is to adjust the transmission line.Impedance matching is very important in circuit design and can effectively improve product performance and product life. RcyPCB is a professional PCB manufacturer in China,we can offer rigid PCB and flex-rigid PCB up to 26 layers,including prototype service and mass production.What's more,as a trusted China PCB manufacturer,we can support you the hi-tech PCB with impedance,but without any additional costs. China PCB manufacturer factory supplier, printed circuit board, rigid PCB, flex-rigid PCB, Asia PCB,Chinese PCB, China PCB-Fabrik,Китайская фабрика печатных плат,...

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The base material selection for High Speed PCB

One of our customer from Europe,they always design and purchase PCB from RcyPCB company.Last week I received an email from this customer,thier engineer planed to design a High-speed project,but they don't know how to choose the base material.This also no wonder,because they focus on some normal projects in last several years,the High-speed design is a new thing for them.I think this is a typical question that worth to share with more people,maybe someone is in needed. We usually select the high speed material depend on the Df value: The material Df 0.01 to 0.005 is suitable for 10GB/s digital circuits; The material Df 0.005 to 0.003 is suitable for 25GB/s digital circuits; The material Df under 0.0015 is suitable for 50GB/s or above digital circuits. The common high speed materials as below: 1)Rogers: RO4003,RO3003,RO4350,RO5880… 2)TUC: TU862,872SLK,883,933 … 3)Panasonic: Megtron4,Megtron6,Megtron7… 4)Isola: FR408HR,IS620,IS680 … 5)Nelco: N4000-13,N4000-13EPSI … 6)Nanya: NPG-170D,NPG-171 … 7)ITEQ: IT-200LK,IT-150DA … 8)Shengyi,Taizhou Wangling… For example,transmiting 25GB/s,its fundamental frequency is 12.5GHz,the third resonance frequency is 37.5GHz,the fifth resonance frequency is 62.5GHz,so the high speed transmission...

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