Background
Our customer, a military and defense contractor, wanted to use flexible circuit technology to build a planar transformer comprised of primary and secondary windings, with very high current carrying capability.
Services & Solutions
Our challenge was to build a circuit with 50 μm line and space and 27 μm traces. We also needed to solve four persistent problems associated with the design requirements:
- Very thick copper traces on the surface of thin polymers
- Thick bonding layers required to conform to traces and provide insulation between layers
- High layer count—ultimately 54 layers
- Through-hole issues resulting from thick dielectric and conductor layers
Results
Using systematic process rigor, our engineers were able overcome all four design obstacles and quickly delivered a reliable circuit to our customer.
