Impedance Controlled Printed Circuit Board

We are offering impedance controlled printed circuit board.
bicheng provides impedance controlled pcb's for r&d, high-tech, it research companies and organizations, large or small.
technical parameters
*controlled dielectric
*controlled impedance
*design coupons
*test coupons
*polar cits500
*tolerance +/-10%
*differential impedance
*single end impedance
actual pcb case
it's a typical sample we offer for high power electronics:
230*230mm=1 pcb fr-4 tg170 4 layers 35 um copper each layer 2.4mm finished thick
min.track/space: 4/4mil min.hole 0.25mm enig surface finish
l1 and l4: track /space 5.1/6mil, 90+/-10% ohm differential impedance
l1, l2 and l4, track /space 6.1/7.8mil, 100+/-10% ohm differential impedance
related pcb products & services:
*high tg 170
*high cti 600v
*multi-layer
*blind vias, half hole, via in pad,
*countersunk hole *gold finger
*bga,csp,qfn
*enig, hasl, immersion silver, osp
*prototype
*mass production
*moq: 1 pcb
*door to door shipment.