pcb dielectric constant

Hi, I would like to know if a multilayer PCB with a high dielectric constant (e=10) and low losses at high frequencies is possible to manufacture. Thanks a lot.

No

You could probably bond ONE layer of flexible er=10 board on top of a sandwich of standard FR4 boards. I have successfully done that with standard "duroid" type boards at lower er's. Need a processing house that can get the thru holes right!

Rich

I've seen RO3010 with e=10.2 at Rogers. Many manufacturers employ ROXXXX for high freq pcb-s. RO3010 wouldn't be a possible option? Thank a lot again.

Hybrids are available from long time using PCBs with low-loss material in top of FR4.

But I believed that you are looking for multilayer PCB using ONLY low-loss and high Er materials. I never seen yet let’s say: 8 layer, 10cm x 10cm board, all layers RO3010.

I haven't tried it, but apparently you can do simple circuits, like directional couplers, with multilayer duroid bonded together.

http://www.secomtel.com/UpFilesPDF/PDF/ROGERS/rt331.pdf

Can I suggest LTCC material than FR4

Generally Rogers RO3000 series is suited for multilayer fabrication. But no high Er prepreg material is provided, instead FEP film is intended for substrate bonding according to Rogers fabrication guidelines. You can build an all RO3010 multilayer with thin low Er FEP layers in between.

I need a PCB with only the top layer of high dielectric constant. I didn't find a manufacturer for RO3010 top layer multilayer PCB. Could you recommend me one?
I also consider the possibility of mounting some alumina pieces on top/in the middle the PTFE substrate, but it seems more complex.

try R6002 or 4350 ideal for multilayer fab with FR4 as bot have similar process involved

Unfortunately, both are low Er.

how much er and what freq are u looking for

I try to replace alumina substrate (e=10). Freqs till 18GHz, at least till 6GHz.

I've seen at LabTech Mw multilayer PCBs with RO3010 are possible.

Thanks.