Heavy Copper PCB Manufacturing
Heavy copper is not just thicker foil — trace/space, hole copper and press windows tighten together and must be reviewed by copper tier.
Since
2009
Bases
Huizhou + Ji'an
Phase-1 area
140,000 m²
Monthly capacity
~160,000 m²
ISO 9001ISO 14001IATF 16949ISO 13485ULRoHS / REACH
6 invention patents + 32 utility model patents
Copper weight wording (conservative public)
Sources differ between 18 oz and outer 8/inner 6 oz; pages use contextual conservative wording.
| Claim | Value | Note |
|---|---|---|
| Common volume window | Outer ≤8 oz / inner ≤6 oz finished | Above this → review |
| Profile peak wording | Finished copper up to 18 oz (contextual) | Not assumed simultaneous with other extremes |
Heavy-copper process control
- Adjust etch factor and width compensation with copper weight — do not copy thin-copper rules
- Review hole copper with aspect ratio (up to 20:1)
- Confirm lamination/registration window under heavy-copper stress
Heavy-copper inspection
- Inner & outer layer 100% AOI
- Flying probe for prototypes; fixture test for volume
- ENIG nickel/gold thickness via XRF
- Impedance boards verified with TDR coupons
- Multilayer X-ray registration; microsection sampling for stack-up
- Delivery yield 99.8%; scrap controlled below 0.3%
- Hole-wall/surface copper via eddy current or microsection
Application context
Power & high current
Power paths, bus bars and thermal copper areas.
Industrial control
Boards combining high-load interconnect with reliability needs.
Battery-protection related
Battery-protection contexts listed in company materials (copper and tests per order).
Project inputs & review
- Inner/outer target copper (base vs finished)
- Gerber, width rules and thermal copper notes
- Via structure, thickness and acceptance criteria
Send us the engineering package for this board type
After engineering review we return manufacturability feedback and a quotation. Extreme parameters are reviewed as a combination of material, stack-up and process — not promised as a default simultaneous window.