scholarly journals Failure analysis of high aspect ratio flexible wing aeroelastic loading

2018 ◽  
Author(s):  
Kamran Ahmad ◽  
Yasir Baig ◽  
Muhammad Ismail
Keyword(s):  
Aspect Ratio ◽  
Failure Analysis ◽  
High Aspect Ratio ◽  
Flexible Wing

scholarly journals High Aspect Ratio, Vertical Bipolar Junction Transistor NPN Device Fault Isolation & Analysis Techniques

2021 ◽  
Author(s):  
Kevin Distelhurst ◽  
Dan Bader
Keyword(s):  
Aspect Ratio ◽  
Failure Analysis ◽  
Analog Circuits ◽  
High Aspect Ratio ◽  
Analog Circuit ◽  
Fault Isolation ◽  
Nanometer Scale ◽  
Bipolar Junction Transistor ◽  
Performance Improvements ◽  
Junction Transistor

Abstract Analog components are still an important aspect of our society's electronic portfolio. They play a role in the emerging and expanding 5G electronic industry, for instance. The NPN bipolar junction transistor (BJT) is the foundation of many analog circuits and has continually evolved to meet more demanding specifications [1], [2]. Certain embodiments of these NPNs pose difficulties in failure analysis. One such embodiment is a vertical NPN BJT with high aspect ratio dimensions. Specifically, the dimensions involved are nanometer thick NP & PN junctions that extend microns in length. These dimensions provide desired performance improvements but a subtle, nanometer scale defect present anywhere along this length can cause substantial electrical shifts detrimental to an analog circuit. Several simple and complex techniques using common failure analysis tools can isolate these defects as discussed in this paper.

scholarly journals Active Gust Load Alleviation of High-Aspect Ratio Flexible Wing Aircraft

2018 ◽  
Author(s):  
Yvonne Ferrier ◽  
Nhan T. Nguyen ◽  
Eric Ting ◽  
Daniel Chaparro ◽  
Xuerui Wang ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Flexible Wing ◽  
Gust Load Alleviation
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