| 摘要 |
Polymers of differing refraction indices are embedded within a PCB to provide optical connectivity of the PCB with other circuit boards via an optic backplane. The creation of islands of polymer material of refractive index n 1 completely surrounded by polymer material with refractive index n 2 where n 1 has a higher index than n 2 allows the islands of n 1 indexed polymer to serve as optical waveguides. A process of forming a multi-layered PCB with the optical waveguide islands using successive laminations and using laser ablation to write the optical connection scheme is taught. Further, the use of uniquely marked targets in a copper layer to align the optical waveguides in production is also taught. Additionally, the use of clearing polymer materials and reinforcing polymer voids with lamination to allow a simple, high tolerance insertion of through-holes is taught.
|
