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Thick Copper PCB

Thick copper PCB products are used extensively in power electronic devices and power supply systems. A growing trend in the PCB industry, this unique type of heavy copper PCB features a finished copper weight of more than 4oz (140μm), compared to the 1oz (35μm) or 2oz (70μm) copper weight generally found in those with a standard PCB copper thickness.

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. Other advantages include increased mechanical strength at connector sites, the ability to create a smaller product size by incorporating multiple weights on the same layer of circuitry and the ability to use exotic materials to their maximum capacity with minimal risk of circuit failure.

Copper PCB Manufacturing Capabilities Table

KML is a highly skilled PCB manufacturer that can develop and produce a superior thick copper PCB product of the highest quality. We offer a thick copper PCB manufacturing service that uses copper weights of up to 15oz (525μm). Check our capabilities in the following table:

Quality GradeStandard IPC 2
Number of Layers2 - 24layers
Order Quantity1pc - 10000+pcs
Build Time2days - 5weeks
MaterialFR-4 Standard Tg 140°C, FR4-High Tg 170°C
Board SizeMin 6mm x 6mm | Max 457mm x 610mm
Board Thickness0.6mm - 6.5mm
Max Outer Layer Copper Weight (Finished)15oz
Max Inner Layer Copper Weight12oz
Min Tracing/SpacingFor External layers: 
4oz Cu 9mil/9mil 
5oz Cu 11mil/11mil 
6oz Cu 13mil/13mil 
12oz Cu 20mil/32mil 
15oz Cu 32mil/40mil 

For Internal layers: 
4oz Cu 8mil/12mil 
5oz Cu 10mil/14mil 
6oz Cu 12mil/16mil 
12oz Cu 20mil/32mil 
Solder Mask SidesAs per the file
Solder Mask ColorGreen, White, Blue, Black, Red, Yellow
Silkscreen SidesAs per the file
Silkscreen ColorWhite, Black, Yellow
Surface FinishHASL - Hot Air Solder Leveling 
Lead Free HASL - RoHS 
ENIG - Electroless Nickle/Immersion Gold - RoHS
Min Annular Ring6mil
Min Drilling Hole Diameter10mil
Other TechniquesGold fingers 
Blind/Buried Vias

Finished Copper PCBs of Superior Quality

KML has a decade of experience in manufacturing and assembling high-performing standard and heavy copper PCB products that help our customers achieve their productivity and profitability goals. We make it a standard operating procedure to have our highly skilled engineers run design for manufacture on every circuit file, and address all questions and concerns before production. This helps to ensure the finished electronic boards meet your performance expectations. Our capable staff includes an in-house quality control department - we guarantee the quality of our printed circuit boards.

(Note: To ensure we can fabricate your thick copper PCB correctly, it is important to take the greater width of traces and spacing between the traces caused by the increased copper weight into consideration.)

Get Custom Quotation for Your Thick Copper PCB Project

Thick Copper PCB manufacturing price can be get within seconds. Just click below button to enter our PCB Quote page, then fill in your circuit spec, the PCB price will show up in the right column. Whenever you are ready to order, follow our online guide to submit the order, upload PCB design file (Gerber format preferred | Preorder Checklist) and issue the payment. We will schedule your heavy copper PCB fabrication right away.