Dear customers, Please kindly have an alert that according to our project experience, we foresee that many ICs will be in very tight supply or even out of stock for a long time, so please schedule your crucial projects of 2021 beforehand. : For more details, please have an alert to this news, down load Electronic Components Price Increase Reminder_Weller Technology Co., Limited

Multi-layer PCB stack up sequence

Introduction PCB stackup is an important factor in determinate the EMC (Electron-Magnetic compatibility) of a electronic product. When we talk about the PCB stack up, we are referring a multi-layer printed circuit board ). A good stack-up can be very helpful in reducing the radiation and the electromagnetic interference from loops on the PCB. On … Continued

How to Choose the Best PCB fabrication Manufacturer

Nowadays,PCB manufacturing is hot competitive, and there is lot of worldwide manufacturing capacity factories for any technology challenge circuit boards. If you’re ready to look for a professional PCB manufacturer for your next project, more or less it can be difficult to determine who is the best option to produce your circuit board. Different PCB fabricators … Continued

The guidelines of PCB silkscreen design

Silkscreen is one of important compositions to a complete PCB board fabrication, especially it’s high importance to PCB assembly. What is the PCB silkscreen? The silkscreen is a layer of ink printed on the bare circuit board used to identify the electronic components, Rev. no.#,test points, marks, logos, symbols, etc. Normally it is printed on … Continued

How to specify PCB layer orientation in PCB design.

To perform the correct PCB production of your printed circuit board, it must have a label in the copper of the PCB top and PCB bottom layer, for multilayer PCB additionally on the inner layers. In China, it was once common practice to label the Component Side (assembly side) with BS, and the solder side … Continued

How to understand PCB Copper balance in PCB fabrication

A symmetric copper distribution (copper balance) on the circuit board is very important, because asymmetric copperleads to bow and twist effects in PCB fabrication process,and finally will affect the soldering quality of components in PCB assembly process. This warping of the form is caused by thermal loads in the circuit board, such as those caused … Continued

How to design couple of different PCBs in one panel

Optimize the global manufacturing cost of PCB and PCBA prototypes When it comes to start a PCB design for prototypes, Most circuit board designers like to put various PCBs (the same layer count and stack up but with difference in size, shape etc) into one panel to optimize the cost in the PCB fabrication and … Continued

Two options of potting epoxy resin to PCB assembly devices.

WellerPCB as a China Printed Circuit Board manufacturer and your offshore PCB Manufacturer has several years of experience successfully manufacturing PCB’s that are RoHS compliant and are compliant with lead-free assembly. We offer a variety of laminate and surface finish options.

What is the PCB impedance coupons

The breif summary about PCB impedance PCB board with controlled impedance trace is very important for signal transmission quality.Especially for quick switching parts with signal rise times of 1 to 2ns, the signal integrity must be guaranteed through good impedance characteristics in the conductor trace connections. What is the PCB impedance coupons The PCB impedance … Continued

Standard 16 layer PCB stackup options

Our standard 16L layers stackup is the most common options selected by most PCB designers. The standard 16 layer stackup can be utilized in most applications for multilayer PCB board. As the standard options, you can get a variable 16 layer stack up from Weller’s engineering suggestion, which is defined by following with 3 options … Continued