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Multilayer PCB

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Detailed Product Description

  • Electrical Test:100% pass
  • Visual Inspection:100% pass

4 layer PCB with board thickness 1.6mm surface finish HASL Lead free , and copper 1 oz 


Description of Model number SKTECH-3254-C:

CB SIZE 189 x 177mm=4PCS
BOARD TYPE
Number of Layers Multilayer, 4 layer PCB
Surface Mount Components YES
Through Hole Components NO
TECHNOLOGY
Minimum Trace and Space: 3mil/4mil
Minimum / Maximum Holes: 0.25/3.50mm
Number of Different Holes: 27
Number of Drill Holes: 3011
Number of Milled Slots: 0
Number of Internal Cutouts: 0
Impedance Control no


Multilayer pcb Introduction
Multilayer PCB's represent one of the most complicated products in the PCB industry. A breakdown of a multilayer PCB shows that it consists of three basic elements: thin rigid laminates, prepreg sheet for bonding the laminates and copper foils.
Purpose of Multilayer PCBs
* To accommodate a larger number of interconnections that steadily increasing use of high pin-count integrated circuits(IC).
* To establish an electrical performance of the multilayer PCB, such as voltage and ground planes, EMC-shielding and circuit speed etc.


Thin laminate (base masterial FR-4)

Vendor Model Thickness Copper TG ER
SHENGYI S1141 0.05-3.2 mm 17-105 μm ≥130 ≤5.4
SHENGYI S1170 0.05-3.2 mm 17-105 μm ≥170 ≤5.4
ITEQ IT-140 0.05-1.5 mm 17-175 μm >135 <5.4
ITEQ IT-180 0.05-1.5 mm 17-175 μm >170 <5.4
ITEQ IT-180A 0.05-1.5 mm 17-175 μm >170 <5.4


Comparison of different Prepreg.

Type of Prepreg Finished Thickness Resin Content
mm mil %
7628H(7630) 0.213 8.4 50
7628(43%) 0.195 7.6 43
7628(41%) 0.185 7.3 41
2116HR 0.135 5.3 57
2116 0.120 4.7 52
2113 0.100 4.0 56
1080 0.076 3.0 64
1060 0.050 2.0 71