Electrical assembly having impedance controlled signal traces
AssigneeResearch In Motion Limited
InventorsEric Gary Malo, Cameron Russell Steeves, Hassan Daniel Hosseinpor
Life of this patent
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Abstract
An electrical assembly having controlled impedance signal traces and a portable electronic device comprising an electrical assembly having controlled impedance signal traces are provided. In accordance with one embodiment, there is provided an electrical assembly, comprising: a chassis for mounting electronic components, the chassis being made from a conductive material and forming a first ground plane; a first dielectric layer overlaying the chassis; a first signal trace overlaying the first dielectric layer; and a second dielectric layer overlaying the first signal trace.
Claims7
An electrical assembly, comprising:
- a chassis made from a conductive material and forming a first ground plane;
- a flexible printed circuit board overlaying the chassis, the flexible printed circuit board including:
- a first dielectric layer directly overlaying the chassis;
- a first signal trace overlaying the first dielectric layer;
- a second dielectric layer overlaying the first signal trace;
- wherein the first and second dielectric layers are integrally formed to form a dielectric substrate layer in which the first signal trace is embedded;
- a ground layer within the dielectric substrate layer forming a second ground plane;
- and multiple conductive vias connecting the first ground plane formed by the chassis to the second ground plane in the flexible printed circuit board.
Dependencies are inferred from the claim text.