I have gotten some great contacts here, thank you all for your 
suggestions!  You've been a wonderful help!  I'm still in process, 
lots of ground to cover here.

Dave

Dear Colleagues:

I am involved in the design of a critical medical product which 
requires the use of a multi-layer rigid flex board.  This board 
(flex) has a 2 layer section, and a 4 layer section.  The thickness 
tolerance is ultra critical, and the 2 layer section cannot exceed 0.004" max.

I am looking for a high quality vendor that can reliably produce / 
reproduce a product with a 4 mil max thickness on a double sided flex.

Thanks in advance for your recommendations.

Dave.

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