Confirm that one routing plane solves the interconnect
Map every net between endpoints and identify unavoidable crossings. Review connector pin assignments and available width before adding a second copper layer. Include power and return conductors in the routing study rather than counting signal traces alone. The single-sided fabrication guide explains the package needed to discuss this construction.
Single-layer section checklist
| Stack feature | Specify | Engineering question |
|---|---|---|
| Conductor | One named copper layer | Can all nets and returns route? |
| Base | Dielectric and any base adhesive | Which laminate construction is proposed? |
| Protection | Coverlay or specified alternative | Where must conductors remain exposed? |
| Support | Local stiffener and bondline | Which interfaces need reinforcement? |
Draw every physical layer
A proposed section might include coverlay film, its adhesive, patterned copper, and a base dielectric; an adhesive-based laminate includes an additional base bonding layer. Label the example as a proposal until material and process review is complete. Show terminal openings as separate sections where necessary. Use the coverlay guide to document insulation around exposed features.
Keep support and movement regional
If a terminal or component area needs support, add a local stiffener section without treating it as a conductive layer. Mark the free span and intended installed shape. For repeated motion, qualify the actual copper pattern and protective construction. A simple copper count can make a design easier to describe, but it does not supply a universal bend radius or service-life guarantee.
Before you release the design
- Check crossings before selecting copper count.
- Include protection and bonding in thickness.
- Show exposed terminal sections.
- Mark supported and moving regions.
Watch points
- One copper layer does not mean one physical material layer.
Practical questions
Can contacts be exposed from another side?
Special access constructions require explicit review and drawings. Do not infer them from a single-layer label.
Does single-layer mean no assembly support is needed?
No. Component and connector loads may still require a defined stiffener or fixture strategy.
Technical references
References support the material or design context. Check the exact grade, part number, document revision and project conditions before release.Updated 27 September 2026 · Technical content policy · Engineering guidance supports project review; the agreed drawing defines the build.