System and method for integrating optical layers in a PCB...

Details System and method for integrating optical layers in a PCB... System and method for integrating optical layers in a PCB...

2006-04-04

2006-04-04

Kianni, Kaveh (Department: 2883)

Optical waveguides

Planar optical waveguide

Thin film optical waveguide

C385S129000, C385S014000, C065S386000

Reexamination Certificate

active

07024086

ABSTRACT:
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 n1completely surrounded by polymer material with refractive index n2where n1has a higher index than n2allows the islands of n1indexed 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.

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