What is the recommendations of 2-4 mils for solder mask expansion. But why is it necessary?

1 year ago

I see recommendations of 2-4 mils for solder mask expansion. But why is it necessary?

Why are there teardrops on PCB pads?

1 year ago

I received the PCB design file from supplier. There are some teardrops, which I have seldom seen. Why are there…

Why does the manufacturer use a flying probe tester when they already have an in-circuit tester?

1 year ago

Last week, I visit a PCBA manufacturer for our new project. They not only introduce in-circuit tester but also flying…

Do modern LED lights use thermal vias?

1 year ago

I have a technical question about thermal management with mid-power LED diodes.Do you use thermal vias on the PC board…

Why the PCB is cold, but LED bulbs are still hot?

1 year ago

I have a THERMAL problem when designing a power LED ALUMINUM PCB. I have 10 5W UV power LEDs.Coldwater flows…

Are vias reliable in flexible circuits?

1 year ago

As we all know, flex PBC is flexible. I am curious about the reliability of vias in it. Is it…

What’s the thickness of FR4 substrate that one should take when designing a micro-strip antenna with an HFSS tool?

1 year ago

I am designing a micro-strip antenna with an HFSS toll, what's the thickness of FR4 substrate that one should take…

What board can be used as foundation for building a power electronic converter?

1 year ago

The power electronic converter is for high power application. I am going to design it for a new project. Any…

Why would a PCB designer use thicker-than-normal copper for a PC board design?

1 year ago

When I sourcing PCB online, I found some of them are with heavy copper. Why would the designer use copper…

A Comprehensive Guide to PCB Prepreg

1 year ago

Prepreg, short for pre-impregnated composite fibers, is an essential material in the manufacture of multilayer printed circuit boards. However, it is often…