1、HDI structure：3+N+3 with stacked via,platted for blind hole2、VIPPO filled by Non-conductive and platted over3、Vias are cleaned by plasma process4、Specific impedance controlled with 55+/-5 Ohms 53+/-5 Ohms； Differential impedance controlled with 90+/-5% Ohms， 100+/-10, Ohms，106Ω±12 Ohms
BVH productApplication：Industrial control product
HDI productApplication：Telecom