How many IP3 fiducials should I read?

2017/2/28 6:46:43

Okay here is the deal. I am fairly new to the company here, but one thing I have noticed is that we read way to many fiducials, in my opinon anyway. One for example is this. One assembly was reading 17 fids. Smallest pitch was .25mil I say you only need two globals. I changed it to that, they still placed fine, yet everyone else in my department dissagress with me. I heard someone say something about reading locals for ALL fine pitch (.25 and smaller) within 2.5' radius around the part. I have never heard of that before. If I am right, (which I think I am) When should you use locals? If ever.. Please help give me any feedback you can.. thanks..

Boris Drazic

2017/3/2 6:46:43

I have learned a lot from your article. Quite useful and impressive info.

Rolf Niemand

2017/3/2 6:46:43

Interesting and useful!

Csaba Simon

2017/3/2 6:46:43

Many thanks. Your idea is very valuable. Will certainly share this post with my pals.


2017/3/2 6:46:43

Your article answered all my puzzles.


2017/3/2 6:46:43

Remarkable.Great help to my learning.

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