Single or multi-layer printed circuit board with improved edge via design
OwnerAlan Wang, Kevin Olsoninventors
Life of this patent
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Abstract
A circuit board includes an electrically conductive sheet having an insulative coating surrounding the conductive sheet, with a surface of the insulative coating around an edge of the conductive sheet having an arcuate or rounded shape. At least one electrical conductor is conformally deposited on at least the rounded insulative coating around the edge of the conductive sheet and defined via photolithographic and metallization techniques. Each electrical conductor on the insulative coating thereon around the edge of the conductive sheet conforms to the arcuate or rounded shape of the insulative coating and, therefore, has an arcuate or rounded shape.
Claims20
A circuit board comprising:
- an electrically conductive sheet coated with an insulative coating that forms an insulating top layer covering one surface of the conductive sheet, an insulating bottom layer covering another surface of the conductive sheet and an insulating edge layer covering an edge of the conductive sheet;
- and
- a first electrical conductor on one of the insulating top layer and the insulating bottom layer and on at least part of the insulating edge layer, wherein:
- the insulating edge layer and the portion of the first electrical conductor thereon each have an arcuate or rounded shape;
- and
- the portion of the first electrical conductor on the insulating edge layer is electrically isolated from the edge of the conductive sheet by the insulating edge layer.
A method of forming a circuit board comprising:
- (a) providing an electrically conductive sheet having top and bottom surfaces and an edge;
- (b) conformally coating the top and bottom surfaces and the edge of the electrically conductive sheet with an insulating material;
- (c) exposing the conformally coated insulating material to an elevated temperature such that the insulating material at least partially melts and flows around the edge of the electrically conductive sheet whereupon, upon removal of the elevated temperature, the insulating material around the edge of the electrically conductive sheet has an arcuate or rounded shape or outline;
- and
- (d) following step (c), forming a first conductor on the insulating material with at least a portion of the first conductor on the insulating material around the edge of the electrically conductive sheet, whereupon said portion of the first conductor has an arcuate or rounded shape or outline.
A circuit board comprising:
- an electrically conductive sheet including an insulating edge layer covering an edge of the conductive sheet;
- and
- an electrical conductor on the insulating edge layer, wherein:
- the insulating edge layer and the electrical conductor have an arcuate or rounded shape or outline.
A circuit board comprising:
- an electrically conductive sheet;
- an insulative coating surrounding the conductive sheet with a surface of the insulative coating around an edge of the conductive sheet being rounded;
- and
- at least one electrical conductor conformally deposited on at least the rounded insulative coating around the edge of the conductive sheet and defined via photolithographic and metallization techniques such that said electrical conductor on the rounded insulative coating around the edge of the conductive sheet has a rounded surface.
Dependencies are inferred from the claim text.