US 10,897,813 B2Granted

Differential trace pair system

AssigneeDell Products L.P.

InventorsUmesh Chandra, Bhyrav M. Mutnury, Chun-Lin Liao

Life of this patent

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Abstract

A differential trace pair system includes a board having a first, a second, a third, and a fourth board structure member. A differential trace pair in the board includes a first differential trace extending between the first and the third board structure members, and a second differential trace extending between the second and the fourth board structure members. The differential trace pair includes a serpentine region that includes a first portion and a second portion where the first and the second differential traces have a first width, are substantially parallel, and spaced apart by a first differential trace pair spacing, and a third portion in which the second differential trace includes a second width that is greater than the first width, the first and second differential traces are substantially parallel and spaced apart by a second differential trace pair spacing that is greater than the first differential trace pair spacing.

Claims4

Dependent claims

A method for providing a differential trace pair, comprising:

forming a first differential trace on a board, wherein the first differential trace includes a first differential trace region along which the first differential trace has a first width;
and
forming a second differential trace on the board that is part of a differential trace pair with the first differential trace, wherein the second differential trace includes a serpentine region that extends adjacent the first differential trace region, and wherein the serpentine region includes:
a first portion and a second portion that:
each have the first width;
are each substantially parallel to the first differential trace;
and
that are each spaced apart from the first differential trace by a first differential trace pair spacing;
and
a third portion that is located between the first portion and the second portion and that:
has a second width that is greater than the first width of a first differential trace section of the first differential trace region that:
is paired with the third portion of the serpentine region;
and
has substantially the same length as the third portion of the serpentine region;
and
is spaced apart from the first differential trace section of the first differential trace region by a second differential trace pair spacing that is greater than the first differential trace pair spacing.

13 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/687,408Filed 18 Nov 2019 · continuation
Priority: 29 Nov 2017
Published: US 2020/0092986 A119 Mar 2020
Granted: 19 Jan 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

H05K 1/0245
High frequency adaptations: lay-out of balanced signal pairs, e.g. differential lines or twisted lines
H05K 1/0248
High frequency adaptations: skew reduction or using delay lines
H05K 1/025
High frequency adaptations: impedance arrangements, e.g. impedance matching, reduction of parasitic impedance
H05K 1/111
Printed elements for providing electric connections to or between printed circuits: pads for surface mounting, e.g. lay-out

Family

Application15/825,746Parent of this continuation · filed 29 Nov 2017
US 2020/0092986 A1Pre-grant publication · published 19 Mar 2020
US 10,485,096 B2Parent of this continuation
US 2019/0166687 A1Published application
US 10,897,813 B2This patent

From the US filing history. Foreign family members aren’t listed.