China plays an important role in PCB manufacturing in the world. In recent years, the global status of PCB manufacturing has tremendous change, and most PCB manufacturing has transferred to Asia, especially China. China has become the main PCB supplier of the world. In the premise that electronic products tend to be more complex, the […]
Author Archives: RCY
Many plating liquids are appended with additives, they will produce an 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 plating surface is too light, the dispersion ability is often not so good, and it’s easy to cause the […]
How to solve the cycle watermarks around the plating hole? Phenomenon: Single side or double side, every hole, hole’s periphery, watermark, like any water remain after naturally dried. Possible reason and solution: Some people called this phenomenon fisheye, this phenomenon is in relation to the Chlorine content. If there is an absolute watermark, it may […]
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 […]
One of our customers from Europe, they always design and purchase PCB from RCY PCB company. Last week I received an email from this customer, their 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 […]
First of all, let’s take a look at this example of case,the context is that there was a project with BGA balls, but the BGA balls were peeled off in the thermal shock. We reviewed all production records and inspection results and excluded the possibility of everything except the reason of gold thickness.The good thickness […]
If we could know the possible risks ahead of the PCB design, the risks will be avoided in advance, the success rate of PCB design will be improved greatly. Many companies have set an index to check the success rate of the first article,the key point of the successful first article is signal integrity design. […]
The higher level of plated edges is the so-called half-hole technology for printed circuits, also named Castellations PCB or Castellated-Hole-PCB. Plated drills are cut in half on the outline of the PCB so that the shape appears like a stamp. Sounds simple but requires multiple additional processes and careful production planning during the CAM layout […]
USB1.1 needs a 48MHz clock to be divided, so a 12MHz crystal oscillator is required, and the frequency is 4 times that of 48MHz. Why don’t choose 48MHz Crystal Oscillator directly? Because a high-frequency crystal oscillator is easy to be affected by peripheral circuits or affect peripheral circuits. Most of the time, we get high […]
Someone who has just started to join in Electronic Industry often faced questions about Crystal Oscillator, even they have researched a lot of resources from reference books or the 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 […]