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Failure Analysis for Space Applications
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Proceedings Papers
ISTFA2018, ISTFA 2018: Conference Proceedings from the 44th International Symposium for Testing and Failure Analysis, 566-571, October 28–November 1, 2018,
Abstract
View Papertitled, SEM/EDS Characterization of Uncommon Metal Whiskers and Determination of Underlying Growth Mechanisms
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for content titled, SEM/EDS Characterization of Uncommon Metal Whiskers and Determination of Underlying Growth Mechanisms
Two case-studies on uncommon metals whiskers, performed at the Reliability Analysis Laboratory (RAL) of Northrop Grumman Innovation Systems, are presented. The components analyzed are an Oven Controlled Crystal Oscillator (OCXO) and an Electromechanical Relay. Investigative techniques were used to determine the chemical and physical makeup of the metal whiskers and develop an understanding of the underlying effects and mechanisms that caused the conditions conducive to whisker growth.
Proceedings Papers
ISTFA2017, ISTFA 2017: Conference Proceedings from the 43rd International Symposium for Testing and Failure Analysis, 618-620, November 5–9, 2017,
Abstract
View Papertitled, Case Study Failure Analysis of an Ultra-High Vacuum Enclosure Made of a Silicon Chip and Borosilicate Glass for the Cold Atom Laboratory
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for content titled, Case Study Failure Analysis of an Ultra-High Vacuum Enclosure Made of a Silicon Chip and Borosilicate Glass for the Cold Atom Laboratory
In this paper, a failure analysis case study on a custom-built vacuum enclosure is presented. The enclosure’s unique construction and project requirement to preserve the maximum number of units for potential future use in space necessitated a fluorocarbon liquid bath for fault isolation and meticulous sample preparation to preserve the failure mechanism during failure analysis.
Proceedings Papers
ISTFA2017, ISTFA 2017: Conference Proceedings from the 43rd International Symposium for Testing and Failure Analysis, 621-630, November 5–9, 2017,
Abstract
View Papertitled, VLSI for Space Applications—Single Event Effect Investigation and Optical Analysis on an Integrated Laser Platform
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for content titled, VLSI for Space Applications—Single Event Effect Investigation and Optical Analysis on an Integrated Laser Platform
Today’s VLSI devices are neither designed nor manufactured for space applications in which single event effects (SEE) issues are common. In addition, very little information about the internal schematic and usually nothing about the layout or netlist is available. Thus, they are practically black boxes for satellite manufacturers. On the other hand, such devices are crucial in driving the performance of spacecraft, especially smaller satellites. The only way to efficiently manage SEE in VLSI devices is to localize sensitive areas of the die, analyze the regions of interest, study potential mitigation techniques, and evaluate their efficiency. For the first time, all these activities can be performed using the same tool with a single test setup that enables a very efficient iterative process that reduce the evaluation time from months to days. In this paper, we will present the integration of a pulsed laser for SEE study into a laser probing, laser stimulation, and emission microscope system. Use of this system will be demonstrated on a commercial 8 bit microcontroller.
Proceedings Papers
ISTFA2017, ISTFA 2017: Conference Proceedings from the 43rd International Symposium for Testing and Failure Analysis, 631-634, November 5–9, 2017,
Abstract
View Papertitled, Failure Analysis Case Study of a 1.5 Meter Space Flex Harness
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for content titled, Failure Analysis Case Study of a 1.5 Meter Space Flex Harness
This paper presents the failure analysis on a 1.5m flex harness for a space flight instrument that exhibited two failure modes: global isolation resistances between all adjacent traces measured tens of milliohm and lower resistance on the order of 1 kiloohm was observed on several pins. It shows a novel method using a temperature controlled air stream while monitoring isolation resistance to identify a general area of interest of a low isolation resistance failure. The paper explains how isolation resistance measurements were taken and details the steps taken in both destructive and non-destructive analyses. In theory, infrared hotspot could have been completed along the length of the flex harness to locate the failure site. However, with a field of view of approximately 5 x 5 cm, this technique would have been time prohibitive.
Proceedings Papers
ISTFA2017, ISTFA 2017: Conference Proceedings from the 43rd International Symposium for Testing and Failure Analysis, 635-642, November 5–9, 2017,
Abstract
View Papertitled, Case Study—Failure Analysis of a Printed Circuit Board Latent Failure and Resulting Implication of Weaknesses in Panel Coupons and Lot DPA
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for content titled, Case Study—Failure Analysis of a Printed Circuit Board Latent Failure and Resulting Implication of Weaknesses in Panel Coupons and Lot DPA
Multiple, independent, system level test failures that occurred around the same time were traced back to a short circuit on the same type of printed circuit board (PCB). The PCBs were removed from the application and sent to the authors' lab for analysis. This paper reviews the analysis techniques and results that led to the failure mechanism being identified. The discussion focuses on steps taken to exonerate the authors' lab and processes as possible sources of contamination. Additional investigation that leads to the conclusion that the issue is systemic is also covered. The paper then focuses on the containment effort as well as root cause identification at the manufacturers. It was concluded that the failure mechanism causing the short circuit in the failed PCB is due to ionic contamination trapped inside the PCB. The normal chemistry required to process the plated through holes contaminated the voids/fractures created by drilling process.