公开(公告)号：US09869643B2

公开(公告)日：2018-01-16

申请号：US14163756

申请日：2014-01-24

Applicant: Cisco Technology, Inc.

Inventor： ShiJie Wen ,  Richard J. Wong

IPC: G01N23/02

CPC classification number: G01N23/02 ,  G01N2223/313 ,  G01N2223/314 ,  G01N2223/6113 ,  G01N2223/646

Abstract: Masks that selectively attenuate radiation for inspections of printed circuit boards (PCB) are disclosed. A PCB may be inspected for defects by exposing the PCB with radiation and analyzing the radiation transmitted through the PCB. By employing a radiation mask having first and second segments between the PCB and a radiation source, the radiation may be selectively attenuated to attenuate a first portion of the radiation with a first attenuation level to prevent performance degradation to sensitive semiconductor devices as part of a first sectional area of the PCB, and yet provide substantially non-attenuation or attenuation at a second attenuation level for a second portion of the radiation incident upon a second sectional area of the PCB which is free from sensitive semiconductor devices. In this manner, the selective attenuation enables inspection of the first and second sectional areas of the PCB without damage to the sensitive semiconductor devices.

公开(公告)号：US11762380B2

公开(公告)日：2023-09-19

申请号：US17813692

申请日：2022-07-20

Applicant: Cisco Technology, Inc.

Inventor： Mark A. Gustlin ,  Richard J. Wong ,  Rakesh Chopra

IPC: G05B23/02 ,  H05K7/20

CPC classification number: G05B23/0283 ,  G05B23/0232 ,  H05K7/20836

Abstract: Embodiments herein describe coupling traditional fan and shaper control along with aggregated knowledge of the temperature history of a hardware device to optimally manage the temperature of the hardware device to preserve its expected life while also providing the lower power, best performing solution possible. In one embodiment, a cooling application manages the expected life by trading off performance and power versus temperature to achieve a desired (or accepted) lifetime. In one embodiment, the cooling application calculates a historical temperature value for the hardware device which is then used to determine the expected life of the hardware device.

公开(公告)号：US11429093B2

公开(公告)日：2022-08-30

申请号：US16723882

申请日：2019-12-20

Applicant: Cisco Technology, Inc.

Inventor： Mark A. Gustlin ,  Richard J. Wong ,  Rakesh Chopra

IPC: G05B23/02 ,  H05K7/20

Abstract: Embodiments herein describe coupling traditional fan and shaper control along with aggregated knowledge of the temperature history of a hardware device to optimally manage the temperature of the hardware device to preserve its expected life while also providing the lower power, best performing solution possible. In one embodiment, a cooling application manages the expected life by trading off performance and power versus temperature to achieve a desired (or accepted) lifetime. In one embodiment, the cooling application calculates a historical temperature value for the hardware device which is then used to determine the expected life of the hardware device.