Heavy Copper


circuit_heavy_copperHeavy Cu does not have a set definition per IPC. We generally define Heavy Copper PCB as the use of 3 ounce copper or higher in inner and/or outer layers of a printed circuit or power distribution board. Saturn is UL-Certified for up to 6-oz copper on inner and outer layers and capable of producing both plated and non-plated PCBs with up to 20 oz copper for double-sided and multilayers.


Heavy copper can be used for a variety of purposes to include high power distribution heat dissipation, planar transformers, and power convertors. New industries such as EV and PV utilize heavy copper for its high current-carrying capabilities while BMS uses it in conjunction with Flex PCB.

Fabrication Issues

Here you will find information on heavy copper fabrication issues that we have resolved:

  •  Delamination
  •  Inner layer alignment
  •  Over-etching
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Sample Boards

20 oz Cu PTH Power Supply
Mouse over pictures below to see description


Heavy Copper Sample Boards

Click here for additional Heavy Copper sample boards from our sister company Saturn Flex.

About Us

Domestic PCB Fabricator

Bare printed circuit board manufacturer (NAICS: 334412)
Romulus, MI (since 1985)
(734) 941-8100

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