Items		Capacity	2019	2020
Max. Layer		36L	38L	40L
Width/Space	Inner layer	75/75um	50/50um	50/50um
	Out layer	75/75um	50/50um	50/50um
Minimum holes		80um	50um	50 um
Ratio		12.5:1	12.5:1	15:1
Copper thickness		8 oz	8 oz	8 oz
Impedance tolerance		±10%	±8%	±5%
Material	high frequency  /Microwave	SV	SV	SV
	Halogen-free	SV	SV	SV
	Lead-free	SV	SV	SV
	Mixed pressing	P	P	SV
	Metal base/core	P	P	SV
	High Tg	SV	SV	SV
HDI	1+C+1	P	P	SV
Rigid-Flex	14 layers	P	P	SV
Buried capacitors, resistors		P	P	SV
Surface treatment		OSP、ENIG、Selective Electricity、Immersion Tin、Immersion Silver、HASL、Etc.

P:Samples； SV:Low volume