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US 12,016,114 B2Granted
Setting the impedance of signal traces of a circuit board using a reference trace
AssigneeSuper Micro Computer, Inc.
InventorsManhtien V. Phan, Mau-Lin Chou, Chih-Hao Lee
Life of this patent
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Abstract
A circuit board has an edge connector with signal traces. The signal traces are formed on a dielectric layer of the circuit board. A reference trace is formed within the dielectric layer or on another surface of the dielectric layer. Parameters of the reference trace are adjusted to set an impedance of a single-ended signal trace or a differential impedance of two adjacent signal traces.
Claims8
A circuit board comprising:
- a dielectric layer;
- a first contact finger and a second contact finger that are on an edge connector of the circuit board, the first and second contact fingers being on a first surface of the dielectric layer and configured to carry a differential signal;
- a reference plane that is on a second surface of the dielectric layer;
- and
- a reference trace that is within the dielectric layer, the reference trace being directly under and between the first and second contact fingers, the reference trace being configured to set a differential impedance of the first and second contact fingers,
- wherein the reference plane, the reference trace, the first contact finger, and the second contact finger each comprises a metal.
3 more elements
Dependencies are inferred from the claim text.