Material

Material

Shengyi  FR-4/Kingboard CEM-1/aluminum

/

TG

Shengyi TG140°，
kingboard TG>130°

 /

Heat Conductivity  for Alu.  boards

1.0

/

CTI

Class 3（CTI≥175V）

/

Specification

Surface  finish

HASL, immersion gold, OSP

/

HASL  is not acceptable for 0.4mm board

Layers

1-6

/

 Finished  Board thickness

0.6-2.0mm

0.4mm or 2.4mm

1-2  layers :0.4-2.4MM;
4layers  :0.8-2.4MM;
6layers  :1.2-2.4MM .

Thickness  Tolerance

T≥1.0mm

±10%

±8%

T<1.0mm

±0.1mm

±10%

Finished  Copper thickness

1OZ(35um)/2OZ(70um)

/

2-6  layers :1oz;2oz;
1-layer  :1oz

finished  inner copper thickness

1OZ(≥1.2mil)

/

Inner  copper thickness

Bow  and twist

Per cater-corner length，≤0.75%

/

For  boards without SMT, the max. 1.5%

Drill

PTH deviation

±3mil

±2mil

NPTH  deviation

±2mil

±1mil

Hole Position Deviation

±3mil

/

Hole wall roughness（Max.）

1.5mil

1mil

Min.  drilling bit diameter

0.3mm

 0.25mm

Max.  drilling bit diameter

6.5mm

/

For  vias  larger than 6.5mm,multiple drilling or milling is recommended

Min.  slot width

0.6mm

/

For  HASL, the min. finished slot width is 0.45mm，for other surface finish, it is 0.5mm

Board  thickness/via diameter

≤6：1

≤7：1

7：1≤value≥6：1，add  one more day for fabrication

PTH deviation

width

±4mil

/

length

±5mil

/

NPTH  deviation

width

±3mil

/

length

±4mil

/

Hole  wall copper thickness

Thinnest

≥0.71mil

≥1mil

average

≥0.8mi

≥1mil

VIA  space (same net)

≥8mil

≥6mil

VIA  space (different net)

≥17mil

≥14mil

Min.  space for component vias  in different net

≥24mil

≥20mil

Max. PTH

Round  hole

8mm

10mm

Slot  holes

6*10mm

8*12mm