CCA Foil and Copper Foil: Structure and Processing
Compare the foil constructions against the intended electrical and processing requirements. Specify total thickness, layer structure, width, surface quality and edge condition, then assess handling, lamination or joining with the actual part. Define the allowed material system before considering substitution.
Engineering comparison
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| Decision | CCA foil | copper foil | Acceptance basis | Your input or result |
|---|---|---|---|---|
| Foil structure | Thin copper-aluminum layered sheet | Thin copper sheet of specified grade and condition | Define total gauge, each layer and layer-ratio basis. | |
| Slitting | Inspect layer continuity and exposed laminate edges | Inspect slit edge, burr and copper surface | Agree edge quality, pinhole and handling criteria for the actual width. | |
| Electrical path | Assess sheet and joint resistance for the composite section | Assess sheet and joint resistance for the copper section | Use equal length, current path, temperature and resistance targets. | |
| Joining | Qualify contact to the copper surface and exposed aluminum edges | Qualify contact to the copper grade and finish | Specify coating, joint stack and exposure; B566 round-wire scope is not foil qualification. |
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Products and specifications
Include the drawing, intended application and acceptance criteria when requesting a comparison.
Review a foil construction