Lightguides and Optical Storage Elements in Polyimide
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-01
Optical interconnection is increasingly important as it becomes necessary to bring optical connections onto the electronic IC card to electro-optic chips which do the electrical-to-optical and optical- to-electrical conversions. This will be done for packaging-density, speed, and reliability reasons. In this environment, it is desirable to be able to process lightguides onto the IC cards and boards using materials and processes compatible with the IC packaging industry. Polyimide is a solution-coated, high temperature, electronic packaging material already in popular use in the IC industry. Techniques are described herein which provide the ability to guide light in this material over centimeters of distance. Also, the guides can be made to withstand processing up to 200oC.