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公开(公告)号：US10806024B2
公开(公告)日：2020-10-13
申请号：US16774867
申请日：2020-01-28
Applicant: Dell Products L.P.
Inventor： Bhyrav Murthy Mutnury , Chun-Lin Liao
Abstract: In one or more embodiments, a circuit board may include a trace pair and a serpentine region of the trace pair, which may include: a first subregion in which the first trace includes a first portion that has a third width and a first length and in which the second trace includes a second portion, at least substantially parallel to the first portion, that has a fourth width, greater than the second width, and a second length; and a second subregion, adjacent to the first subregion, in which the first trace includes a third portion that has the third width and a third length and in which the second trace includes a third portion that has the fourth width and a third length, different from the second length.
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公开(公告)号：US20200253036A1
公开(公告)日：2020-08-06
申请号：US16264939
申请日：2019-02-01
Applicant: Dell Products L.P.
Inventor： Umesh Chandra , Chun-Lin Liao , Bhyrav M. Mutnury
Abstract: A differential trace pair system includes a board including a board structure having a first, a second, a third, and a fourth board structure member, wherein a distance between the first and the third board structure members is longer than a distance between the second and the fourth board structure members. The differential trace pair system further includes a differential trace pair that 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 second differential trace having a serpentine structure that includes a first portion that continuously transitions away from the first differential trace and a second portion that is contiguous with the first portion, the second portion continuously transitions towards the first differential trace.
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公开(公告)号：US11026321B2
公开(公告)日：2021-06-01
申请号：US16264939
申请日：2019-02-01
Applicant: Dell Products L.P.
Inventor： Umesh Chandra , Chun-Lin Liao , Bhyrav M. Mutnury
Abstract: A differential trace pair system includes a board including a board structure having a first, a second, a third, and a fourth board structure member, wherein a distance between the first and the third board structure members is longer than a distance between the second and the fourth board structure members. The differential trace pair system further includes a differential trace pair that 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 second differential trace having a serpentine structure that includes a first portion that continuously transitions away from the first differential trace and a second portion that is contiguous with the first portion, the second portion continuously transitions towards the first differential trace.
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公开(公告)号：US20190261505A1
公开(公告)日：2019-08-22
申请号：US16295228
申请日：2019-03-07
Applicant: Dell Products L.P.
Inventor： Bhyrav M. Mutnury , Chun-Lin Liao
Abstract: In one or more embodiments, a circuit board may include a trace pair and a serpentine region of the trace pair, which may include: a first subregion in which the first trace includes a first portion that has a third width and a first length and in which the second trace includes a second portion, at least substantially parallel to the first portion, that has a fourth width, greater than the second width, and a second length; and a second subregion, adjacent to the first subregion, in which the first trace includes a third portion that has the third width and a third length and in which the second trace includes a third portion that has the fourth width and a third length, different from the second length.
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公开(公告)号：US10306749B1
公开(公告)日：2019-05-28
申请号：US15898845
申请日：2018-02-19
Applicant: Dell Products L.P.
Inventor： Bhyrav Murthy Mutnury , Chun-Lin Liao
Abstract: In one or more embodiments, a circuit board may include a trace pair and a serpentine region of the trace pair, which may include: a first subregion in which the first trace includes a first portion that has a third width and a first length and in which the second trace includes a second portion, at least substantially parallel to the first portion, that has a fourth width, greater than the second width, and a second length; and a second subregion, adjacent to the first subregion, in which the first trace includes a third portion that has the third width and a third length and in which the second trace includes a third portion that has the fourth width and a third length, different from the second length.
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Patent Agency Ranking
公开(公告)号：US12123907B2
公开(公告)日：2024-10-22
申请号：US17729886
申请日：2022-04-26
Applicant: Dell Products L.P.
Inventor： Ching-Huei Chen , Bhyrav Mutnury , Chun-Lin Liao , Chi-Hsiang Hung , Pei-Ju Lin
CPC classification number: G01R31/2812 , G01R1/07
Abstract: A flying probe includes a test module and a processor. The test module measures a plurality of delta capacitances associated with a plurality of vias in a printed circuit board. The plurality of vias include first, second, third and fourth vias. Each different delta capacitance is measured between a different pair of the vias. The processor compares all the delta capacitances to a threshold value. In response to multiple delta capacitances associated with the first via being greater than or equal to the threshold value, the processor detects a possible via stripping issue for the first via.
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公开(公告)号：US10813211B2
公开(公告)日：2020-10-20
申请号：US16221078
申请日：2018-12-14
Applicant: Dell Products L.P.
Inventor： Pei-Yang Weng , Chun-Lin Liao , Bhyrav Murthy Mutnury
IPC: H05K1/02 , H05K3/00 , G06F30/392 , G06F30/394 , G06F30/398 , G06F119/10
Abstract: Traces on a PCB can be spaced closer together than in conventional layouts, which previously required the pair-to-pair spacing for the high-speed differential stripline signals to be at least 5H if the signals are originating from the same source and 7H when the signals on two pairs of transmission lines in the traces originate from different sources. Traces may be spaced closer together when, for example, a ratio of the core height to the prepreg height of the printed circuit board is approximately equal to one. Traces may be spaced closer together when, for example, a ratio of the trace spacing distance to the core height distance is less than approximately one. By implementing one or both of these design rules, printed circuit board layouts can be designed, and printed circuit boards manufactured from those designs, that have an intra-group spacing between the first pair and the second pair measured at a point at which the first pair is closest to the second pair of less than approximately five times the prepreg height (the limit for previous printed circuit board designs).
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公开(公告)号：US20190274213A1
公开(公告)日：2019-09-05
申请号：US15910773
申请日：2018-03-02
Applicant: Dell Products L.P.
Inventor： Umesh Chandra , Chun-Lin Liao , Bhyrav M. Mutnury
Abstract: A circuit board pad mounting orientation system includes a board. A signal transmission line is included on the board. A plurality of connector pads are positioned on the board. At least one connector pad receives the signal transmission line adjacent a first end of that connector pad. At least one connector pad includes a second end that provides a reduction in a width of that connector pad to indicate a mounting orientation for coupling to the connector pad that receives the signal transmission line. In a specific example, a first connector pad receives the signal transmission line, includes the first end, and includes the second end that is opposite the first connector pad from the first end and that provides the reduction in the width of the first connector pad to indicate the mounting orientation for coupling to the first connector pad.
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公开(公告)号：US10779404B2
公开(公告)日：2020-09-15
申请号：US15951593
申请日：2018-04-12
Applicant: Dell Products L.P.
Inventor： Vasa Mallikarjun Goud , Chun-Lin Liao , Bhyrav M. Mutnury
Abstract: A circuit board pad resonance control system includes a board. A signal transmission line is included on the board. A plurality of connector pads are positioned on the board. A first connector pad receives the signal transmission line adjacent a first end of that connector pad. The first connector pad includes a mounting surface that mounts directly to a coupling element that is configured to couple a subsystem to the board, and reduces a resonance that is produced by an open portion of a signal transmission path that is created when the coupling element is directly mounted to the mounting surface of the first connector pad in a first orientation. In a specific example, the mounting surface may include a plurality of protrusions, a plated surface, and/or a mask that reduces the conductivity of the connector pad which reduces signal integrity issues due to resonance.
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公开(公告)号：US20200170103A1
公开(公告)日：2020-05-28
申请号：US16774867
申请日：2020-01-28
Applicant: Dell Products L.P.
Inventor： Bhyrav Murthy Mutnury , Chun-Lin Liao
Abstract: In one or more embodiments, a circuit board may include a trace pair and a serpentine region of the trace pair, which may include: a first subregion in which the first trace includes a first portion that has a third width and a first length and in which the second trace includes a second portion, at least substantially parallel to the first portion, that has a fourth width, greater than the second width, and a second length; and a second subregion, adjacent to the first subregion, in which the first trace includes a third portion that has the third width and a third length and in which the second trace includes a third portion that has the fourth width and a third length, different from the second length.
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