non standart 2.2mm 4 layer pcb manufacturer need in china.

[orpheus]

hello all.

we need 4 layer fr4 pcb board. but with non standarts stack up.

top layer - 35 um copper
prepreg - 0.8 mm
mid layer1 - 35 um copper
core - 0.5 or 0.6 mm
mid layer 2 - 35 um copper
prepreg - 0.8 mm
bottom layer - 35 um copper

so total thickness it about 2.2 mm. most of chinese factories says they cant produce a pcb like this.

also cant we use 2 inner core layer instead of preprgs ( for better dielectric stability)

 

[kevin54]

Try checking with PCBFabrication (Printed Circuit Board (PCB) Fabrication - Home Page). I've bought lots of boards from them and they are quite good. They manufacture in China but have a sales office in USA. If by "core" you mean something like Rogers RO4003C or RO4350B in 0.5mm thickness, they offer those materials, although I don't know if they can give you the layer stackup you want. It would have to be a custom quote, you'll need to email them.