Hi!
We are making a device based on OPT8241-CDK-EVM schematics, also almost every components from it is used in our device. So, as you know, it has some BGA-0.4mm elements, because of this nobody in our country can not manufacture such comlex HDI PCB (min. spacing 2.9mil, min. trace width 3.22 mil, min. drill 6mil). Can you tell me or give a advice where in the world can we fabricate such PCB?
Thank you for answer, in advance!