We have a few customers are Universities in US,Singapore,UK and Australia.Here is a project for university as well .
Here is a set of 4 layer ,3 designs per set. Gold thickness :5 U'' (0.13um),min hole 0.13mm.
BGA pad to hole 4.25mil， board thickness 1.4mm,Serpentine line impedance
Impedance control
single ended: 24 mil ,50 ohm +/-8%.
Differential impedance：9/7 mil,100 ohm +/-8%
BGA pad to hole 4.25mil， board thickness 1.4mm,Serpentine line impedance
Impedance control
single ended: 24 mil ,50 ohm +/-8%.
Differential impedance：9/7 mil,100 ohm +/-8%
 Serpentine line impedance |  0.12mm via,BGA. board 15*13m |
