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US 7,583,880 B2Granted
Methods of forming printed circuit boards having optical functionality
AssigneeRohm and Haas Electronic Materials LLC
InventorsEdgardo Anzures, Philip D. Knudsen
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Abstract
Provided are methods of forming printed circuit boards having optical functionality. The methods involve applying a dry-film to a printed circuit board substrate and forming an optical waveguide over the dry-film. The invention finds particular applicability in the electronics and optoelectronics industries.
Claims12
A method of forming a printed circuit board having optical functionality, comprising:
- applying a dry-film layer to a printed circuit board substrate;
- and
- forming an optical waveguide directly on the dry-film layer, the forming comprising:
- forming a first clad layer directly on the dry-film layer, wherein the first clad layer forms a lowermost portion of the waveguide;
- forming a core layer on the first clad layer;
- patterning the core layer to form a core;
- and
- forming a second clad layer on the first clad layer and the core.
5 more elements
Dependencies are inferred from the claim text.