Hui He He

US Patent:

20200053880, Feb 13, 2020

Filed:

Oct 17, 2019

Appl. No.:

16/655621

Inventors:

- Sunnyvale CA, US
Hui HE - San Jose CA, US
Thomas W. JETTON - Sunnyvale CA, US

International Classification:

H05K 3/00
H05K 1/11
H05K 3/46
H05K 3/40
H05K 1/02
H05K 3/22

Abstract:

A printed circuit board (PCB) may include a plurality of horizontally disposed signal layers. The PCB may include a first vertically disposed differential via electrically connected to a first horizontally disposed signal layer, of the plurality of horizontally disposed signal layers, and a second horizontally disposed signal layer of the plurality of horizontally disposed signal layers. The PCB may include a second vertically disposed differential via electrically connected to the first signal horizontally disposed layer and the second horizontally disposed signal layer. The PCB may include a first set of clearances encompassing the first vertically disposed differential via and the second vertically disposed differential via, a second set of clearances encompassing the first vertically disposed stub, and a third set of clearances encompassing the second vertically disposed stub.

US Patent:

20190098765, Mar 28, 2019

Filed:

Sep 28, 2017

Appl. No.:

15/719168

Inventors:

- Sunnyvale CA, US
Hui He - San Jose CA, US
Thomas W. Jetton - Sunnyvale CA, US

International Classification:

H05K 3/00
H05K 1/11
H05K 1/02
H05K 3/46
H05K 3/40

Abstract:

A printed circuit board (PCB) may include a plurality of horizontally disposed signal layers. The PCB may include a first vertically disposed differential via electrically connected to a first horizontally disposed signal layer, of the plurality of horizontally disposed signal layers, and a second horizontally disposed signal layer of the plurality of horizontally disposed signal layers. The PCB may include a second vertically disposed differential via electrically connected to the first signal horizontally disposed layer and the second horizontally disposed signal layer. The PCB may include a first set of clearances encompassing the first vertically disposed differential via and the second vertically disposed differential via, a second set of clearances encompassing the first vertically disposed stub, and a third set of clearances encompassing the second vertically disposed stub.

US Patent:

20180376583, Dec 27, 2018

Filed:

Jun 23, 2017

Appl. No.:

15/632108

Inventors:

- San Jose CA, US
John CONTRERAS - Palo Alto CA, US
Ronald G. PARKINEN - Lake Forest CA, US
Xinzhi XING - San Jose CA, US
Hui HE - San Jose CA, US

Assignee:

Western Digital Technologies, Inc. - San Jose CA

International Classification:

H05K 1/02
H01F 17/00
H03H 7/01

Abstract:

Disclosed herein are printed circuit boards with embedded solenoid filters through which signal traces pass to filter unwanted noise and electromagnetic interference. A printed circuit board comprises a least three layers, a solenoid embedded within the at least three layers, and at least one trace extending through the solenoid. The insertion loss characteristics of the solenoid filter can be tuned by modifying the number of turns in the solenoid(s) and the width of the solenoid(s). The solenoid filter may comprise multiple solenoids connected in series, with adjacent solenoids having opposite wind directions. Surface components may be included on the board to tune the insertion loss further.

US Patent:

20170295644, Oct 12, 2017

Filed:

Jun 23, 2017

Appl. No.:

15/631336

Inventors:

- San Jose CA, US
John CONTRERAS - Palo Alto CA, US
Satoshi NAKAMURA - Yokohama, JP
Hui HE - San Jose CA, US

Assignee:

Western Digital Technologies, Inc. - San Jose CA

International Classification:

H05K 1/02
G11B 33/12
H05K 1/03
H01P 7/06
H05K 1/11

Abstract:

Disclosed herein are printed circuit boards (PCBs) with patterned ground structure filters and data storage devices comprising such PCBs. Each PCB comprises a resonator having an L-shape or a zig-zag shape in a plane of the printed circuit board and at least one signal trace. The resonator has a first dimension and a second dimension in the plane of the printed circuit board. A portion of the at least one signal trace is situated over the resonator and is separated by a distance from the resonator by a dielectric material. In some embodiments, at least part of the portion of the at least one signal trace extends in a same direction as the first dimension (in the case of an L-shaped resonator) or tracks the zig-zag shape of the resonator (in the case of a zig-zag-shaped resonator).