Author Topic: PCB 101  (Read 3255 times)

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Offline johnallen76Topic starter

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PCB 101
« on: March 14, 2013, 07:50:47 pm »
I'm new to PCB design - Student at the University
I plan to build a Spartan 6 board for my final project
I'm guessing this might turn into a 6, 8 or 10 layer board

I need help in understanding what drill size to use.
What are the most common sizes used and why.

signal via
power via
mounting holes

for

4mil/4mil   designs
5/5 deisgns
8/8 designs
 

Offline marshallh

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Re: PCB 101
« Reply #1 on: March 14, 2013, 08:38:05 pm »
Practical lower limit for mechanical drills is about 12mil. It is possible to go smaller with classic bits, but breakage is an issue and it's expensive.

With a 12/13mil drill and a modest annular ring you should be break out 1mm BGAs. 6/6 is really the biggest you could get away with. 5/5 is better.

For mounting i use a 3/8 plated drill but this depends on what you'll be using it for.

What you really need to do is to get your hands on some high end PCBs and study them.
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Offline John steave

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Re: PCB 101
« Reply #2 on: September 30, 2013, 04:45:45 pm »
For your kind attention I am telling you to build your knowledge about PCB because you just try to build project upon PCB. That's well and good, there are plenty of places where you try to solve your problem.                           
I’m not recommending but perhaps you could check out this   PCB
« Last Edit: September 30, 2013, 04:47:33 pm by John steave »
 

Offline mikeselectricstuff

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Re: PCB 101
« Reply #3 on: September 30, 2013, 05:04:12 pm »
I'm new to PCB design - Student at the University
I plan to build a Spartan 6 board for my final project

In which case I strongly suggest you base it around a devboard or ready-made module. This is not the sort of thing to start learning PCB layout with
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