An Advanced Reliability Improvement and Failure Analysis Approach to Thermal Stress Issues in IC Packages

2009 ◽  
Author(s):  
Michael Hertl ◽  
Diane Weidmann ◽  
Alex Ngai
Keyword(s):  
Thermal Stress ◽  
Failure Analysis ◽  
Deformation Measurement ◽  
Stress Conditions ◽  
Analysis Approach ◽  
New Approach ◽  
Reliability Improvement

Abstract A new approach to reliability improvement and failure analysis on ICs is introduced, involving a specifically developed tool for Topography and Deformation Measurement (TDM) under thermal stress conditions. Applications are presented including delamination risk or bad solderability assessment on BGAs during JEDEC type reflow cycles.

Analysis Approach on DMOS Transistor Vth Mismatch Due to Trapped Charges

2015 ◽  
Author(s):  
Hashim Ismail ◽  
Ang Chung Keow ◽  
Kenny Gan Chye Siong
Keyword(s):  
Failure Analysis ◽  
Threshold Voltage ◽  
Gate Oxide ◽  
Analysis Approach ◽  
Test Results ◽  
Root Cause ◽  
Switching Event ◽  
Output Transistor ◽  
Event Based ◽  
Trapped Charge

Abstract An output switching malfunction was reported on a bridge driver IC. The electrical verification testing revealed evidence of an earlier over current condition resulting from an abnormal voltage sense during a switching event. Based on these test results, we developed the hypothesis that a threshold voltage mismatch existed between the sense transistor and the output transistor. This paper describes the failure analysis approach we used to characterize the threshold voltage mismatch as well as our approach to determine the root cause, which was trapped charge on the gate oxide of the sense transistor.

New Approach of Laser-SQUID Microscopy to LSI Failure Analysis

2009 ◽  
Vol E92-C (3) ◽  
pp. 327-333 ◽  
Author(s):  
Kiyoshi NIKAWA ◽  
Shouji INOUE ◽  
Tatsuoki NAGAISHI ◽  
Toru MATSUMOTO ◽  
Katsuyoshi MIURA ◽  
...  
Keyword(s):  
Failure Analysis ◽  
New Approach

scholarly journals Improved image-based deformation measurement for geotechnical applications

2016 ◽  
Vol 53 (5) ◽  
pp. 727-739 ◽  
Author(s):  
S.A. Stanier ◽  
J. Blaber ◽  
W.A. Take ◽  
D.J. White
Keyword(s):  
Measurement Precision ◽  
Deformation Measurement ◽  
Centrifuge Model Test ◽  
Displacement Fields ◽  
New Approach ◽  
Performance Benchmarking ◽  
Image Velocimetry ◽  
Spatially Varying ◽  
Deformation Modes ◽  
Sand Plug

This paper describes and benchmarks a new implementation of image-based deformation measurement for geotechnical applications. The updated approach combines a range of advances in image analysis algorithms and techniques best suited to geotechnical applications. Performance benchmarking of the new approach has used a series of artificial images subjected to prescribed spatially varying displacement fields. An improvement by at least a factor of 10 in measurement precision is achieved relative to the most commonly used particle image velocimetry (PIV) approach for all deformation modes, including rigid-body displacements, rotations, and strains (compressive and shear). Lastly, an example analysis of a centrifuge model test is used to demonstrate the capabilities of the new approach. The strain field generated by penetration of a flat footing and an entrapped sand plug into an underlying clay layer is computed and compared for both the current and updated algorithms. This analysis demonstrates that the enhanced measurement precision improves the clarity of the interpretation.

Virulence-associated genes and toxin-antitoxin system genes of Shigella flexneri: Presence and expression in normal and thermal stress conditions

Meta Gene ◽  
2021 ◽  
Vol 27 ◽  
pp. 100825
Author(s):  
Abbas Maleki ◽  
Mehrnoush Safikhani Moslem ◽  
Ebrahim Kouhsari ◽  
Iraj Pakzad ◽  
Zahra Ghafouri ◽  
...  
Keyword(s):  
Thermal Stress ◽  
Shigella Flexneri ◽  
Stress Conditions

Environmental barrier coating (EBC) durability modeling using a progressive failure analysis approach

2012 ◽  
Author(s):  
Ali Abdul-Aziz ◽  
Galib Abumeri ◽  
William Troha ◽  
Ramakrishna T. Bhatt ◽  
Joseph E. Grady ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Progressive Failure ◽  
Analysis Approach ◽  
Environmental Barrier ◽  
Progressive Failure Analysis ◽  
Environmental Barrier Coating ◽  
Barrier Coating

scholarly journals Parameters Assessment of the FMEA Method by Means of Fuzzy Logic

2018 ◽  
Vol 2 (Special edition 2) ◽  
pp. 123-132
Author(s):  
Jasminka Bonato ◽  
Martina Badurina ◽  
Julijan Dobrinić
Keyword(s):  
Fuzzy Logic ◽  
Failure Analysis ◽  
Failure Mode ◽  
Mathematical Function ◽  
Analysis Method ◽  
Effect Analysis ◽  
New Approach ◽  
System Failures ◽  
Numerical Indicator ◽  
Fmea Method

The paper aims at presenting the FMEA method based on the fuzzy technique, representing a new approach to the failure analysis and its effects on the observed system. The FMEA (Failure Mode and Effect Analysis) method has assigned the risks a coefficient i.e. a numerical indicator that very clearly defines the degree of risk. The risk is calculated as a mathematical function of RPN which depends on the effects S, probability O that some case will lead to a failure and to a probability that a failure D can not be detected before its effects are realized. RPN = S O D. The FMEA method, based on the fuzzy logic, makes a more reliable evaluation of the observed system failures possible.

Applying Interval Fuzzy Petri Net to Failure Analysis

2020 ◽  
Vol 11 (1) ◽  
pp. 14-30
Author(s):  
Lajmi Fatma ◽  
Jalel Ghabi ◽  
Hedi Dhouibi
Keyword(s):  
Fuzzy Logic ◽  
Failure Analysis ◽  
Petri Nets ◽  
Graphical Representation ◽  
Logic Gate ◽  
New Approach ◽  
Novel Method ◽  
Definition Of ◽  
Fuzzy Logic Technique ◽  
The Relationship

In this article, the authors propose a new approach for modelling and failure analysis by combining the graphical representation provided by Petri nets and fuzzy logic. The graphical method is used for describing the relationship between conditions and events. The use of Petri nets in failure analysis enables replacing logic gate functions in fault trees. The Fuzzy logic technique allows natural language descriptions of process entities as well as an if-then rule-based definition of production. In addition, this study devises an alternative, a trapezoidal graph method in order to account for failure scenarios. Examples validating this novel method in dealing with failure analysis are also provided.

Sign in / Sign up

Export Citation Format

Share Document