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Dear Technet,
I hv an issue with a 4-layers boards. I am not sure what my customer's
requirement, because I am not familar with PCB fabrication. Pls escuse me.
>From the fab diagram, this is one of the drawing what being showed.
Customer's Requirement: ______________
0.4
--------------
| 0.6 |
--------------
0.4
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PCB supplier's recommendation: ______________
0.11 x 2
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| 1.0 |
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0.11 x 2
--------------
Could anybody can explain to me what it means ? And what the differecnce
between the cust's requirement & the supplier's recommendation in term of
board processing and also when come to PCB assembly.
And could anybody tell me how to determine the PCB inner & external copper
thickness. I realise some of our boards, of same model, but differ in
weight & thickness, and sometimes twist after reflow from batch to batch.
Thks and Regards..
Poh Kong Hui
Nera Electronics
Email: [log in to unmask]
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