Dell Products Inc.

Ching-Huei Chen

Bhyrav M Mutnury

Chun-Lin Liao

Sandor Tibor Farkas

Steven Richard Ethridge

Chi-Hsiang Hung

Pei-Ju Lin

Back drilling vias of a PCB, including: identifying a particular diameter of a particular via of multiple vias of the PCB; back drilling of the particular via with a first drill bit having a first diameter, the first diameter a first percentage greater than the particular diameter of the particular via; determining whether the first diameter of the first drill bit is a threshold percentage greater than the particular diameter of the particular via; determining that the first diameter of the first drill bit is less than the threshold percentage greater than the particular diameter of the particular via, and in response: back drilling of the particular via with a second drill bit having a second diameter, the second diameter a second percentage greater than the particular diameter of the particular via, the second diameter greater than the first diameter.

Back drilling vias of a printed circuit board

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.

Detecting a via stripping issue in a printed circuit board

An aperiodically overlapping spiral-wrapped cable shield system includes a cable having cable components such as a pair of conductors, at least one insulator surrounding the pair of conductors, and at least one drain wire. The cable also includes a cable shield that is spirally wrapped around the cable components with a varying wrap pitch that provides a plurality of overlapping cable shield portions with varying overlap areas. When signals are transmitted using the cable components in the cable, the varying overlap areas of the plurality of overlapping cable shield portions create a plurality of varying LC circuits that are configured to generate a resonance that does not exceed a signal integrity resonance threshold for a signals.

Aperiodically overlapping spiral-wrapped cable shield system

A printed circuit board includes a circuit trace and a connector pad. The connector pad provides electrical and mechanical mounting of a connector lead of a surface mount device and provides a circuit path between the surface mount device and the circuit trace. The connector pad includes 1) a connector pad base electrically coupled to the circuit trace, and 2) a first connector pad island electrically isolated from the connector pad base. The connector pad base has a length that is substantially equal to a length of a contact portion of the connector lead.

Growing community of inventors

Pingtun, Taiwan

Ching-Huei Chen