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OEM China High Quality heavy copper 3 oz per ft2 to 10 oz per ft2 in the outer and inner layers

Short Description:

Heavy copper PCB is also known as thick copper PCB, in which there are 3 ounces (oz) of copper or more on the internal and external layers of a printed circuit board.


Layers: 10L 4OZ Heavy copper PCB

Base Material:S1170


Min. Hole:0.25mm

Minimum Line Width/Clearance:0.25mm/0.25mm

Minimum Clearance between Inner Layer PTH and Line: 0.2mm


Aspect Ratio:10 : 1

Surface treatment:Hard Gold plating

surface copper ≧4OZ

Speciality:  Full Body hard gold plating , finished Copper Thickness: 4 OZ

Applications:power electronic devices

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What is Heavy copper PCB?

Heavy copper PCB products are widely used in power electronic equipment and power supply system.The additional copper PCB thickness enables the board to conduct a higher current, achieve good thermal distribution and implement complex switches in a limited space.

This unique type of thick copper PCB has a finished copper weight of more than 4 ounces (140 microns), compared to the standard PCB copper thickness of 1oz or 2oz.


YMS Heavy copper PCB manufacturing capabilities:

YMS Heavy copper PCB manufacturing capabilities overview
Feature capabilities
Layer Count 1-30L
Base Material FR-4 Standard Tg,  FR4-mid Tg,FR4-High Tg
Thickness 0.6 mm - 8.0mm
Maximum Outer Layer Copper  Weight (Finished) 15OZ
Maximum Inner Layer Copper  Weight (Finished) 30OZ
Minimum line Width and Space 4oz Cu 8mil/8mil; 5oz Cu 10mil/10mil; 6oz Cu 12mil/12mil; 12oz Cu 18mil/28mil; 15oz Cu 30mil/38mil .etc.
BGA  PITCH 0.8mm(32mil)
Min mechanical Drilled Size 0.25mm(10mil)
Aspect Ratio for through hole 16:1
Surface Finish HASL, Lead free HASL,ENIG,Immersion Tin, OSP, Immersion Silver, Gold Finger, Electroplating Hard Gold, Selective OSP,ENEPIG.etc.
Via Fill Option The via is plated and filled with either conductive or non-conductive epoxy then capped and plated over(VIPPO)
Copper filled, silver filled
Registration ±4mil
Solder Mask Green, Red, Yellow, Blue, White, Black, Purple, Matte Black, Matte green.etc.

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What is HDI PCB?

HDI stands for High Density Interconnector. A circuit board which has a higher wiring density per unit area as opposed to conventional board is called as HDI PCB. HDI PCBs have finer spaces and lines, minor vias and capture pads and higher connection pad density.

What is copper weight on PCB?

1 ounce

Copper Weight or Copper Thickness in a Printed Circuit Board represents the thickness of 1 ounce of copper rolled out over an area of 1 square foot. For example, a PCB that has a copper weight of 1 oz will have a layer of copper that is 1.4 mils in thickness.

What is the thickness of 1 oz of copper on a PCB?


The copper in a PCB is rated in ounces, and represents the thickness of 1 ounce of copper rolled out to an area of 1 square foot. For example a PCB that uses 1 oz. copper has a thickness of 1.4mils.

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