Measuring each Layer dimesions

[magarcia9]

When a PCB is fabricated  is it normal to ask the PCB magnufacturer that the customer wants to witness the measuring dimension of each layer? For example copper thickness, trace width, and copper pour.

This question was ask by mechanical engineers at my company.

[doggg1]

Hello,

You can have a cross section of the board sent to you. This is not part of any of your boards, but is actually a part of the extra material which holds the boards together on the, for example 18" by 24" overall panel. It has example layers so you can measure the copper thickness on each layer and prepreg between them. Your board house can get these to you a day or two before the boards show up, or can email you a picture of the cross section if you want it. in 25 years of doing boards, I have never needed them. I inspect the operation before I do business.

db

[Glen77354]

to: magarcia9

I agree with doggg1.  I've bought boards for 20 years and I want to visit a board house and assess their capabilities before starting business.  Having said that, I might ask them for samples for various purposes - or cut up a couple of the boards received myself to analyse the quality of the process.

n most instances, especially if you don't have the tools, the board house will cut and provide prepared samples to you, with, or without their own data.  There could be a small fee, but for those initial orders, it is worth it to gain the confidence.

Good luck!