Thermal mapping of defects in AlGaN∕GaN heterostructure field-effect transistors using micro-Raman spectroscopy

2005 ◽  
Vol 87 (10) ◽  
pp. 103508 ◽  
Author(s):  
J. W. Pomeroy ◽  
M. Kuball ◽  
D. J. Wallis ◽  
A. M. Keir ◽  
K. P. Hilton ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Micro Raman Spectroscopy ◽  
Thermal Mapping ◽  
Heterostructure Field Effect Transistors ◽  
Gan Heterostructure

Flip Chip Mounting for Improved Thermal Management of AlGaN/GaN HFETs

2005 ◽  
Vol 892 ◽  
Author(s):  
Hangfeng Ji ◽  
Andrei Sarua ◽  
Martin Kuball ◽  
Jo Das ◽  
Wouter Ruythooren ◽  
...  
Keyword(s):  
Thermal Management ◽  
Field Effect ◽  
Flip Chip ◽  
Field Effect Transistors ◽  
Operating Temperature ◽  
Ir Thermography ◽  
Device Management ◽  
Micro Raman Spectroscopy ◽  
Heterostructure Field Effect Transistors ◽  
Gan Heterostructure

AbstractWe report on a temperature study of flip-chip mounted multi-finger AlGaN/GaN heterostructure field effect transistors (HFETs) using micro-Raman spectroscopy and infrared (IR) thermography. Flip-chip mounting can be used to improve thermal device management, in particular, for devices grown on low thermal conductivity substrates such as sapphire. In this study, we compare two flip-chip mounted HFETs of different flip-chip contact bump layout designs and a non flip-chip mounted HFET. Both temperature measurements and 3D temperature simulations are presented. The results show that minimizing the distance between the bumps and the active area of the HFET is essential for obtaining a low device operating temperature.

Residual strain in recessed AlGaN/GaN heterostructure field-effect transistors evaluated by micro photoluminescence measurements

2012 ◽  
Vol 9 (3-4) ◽  
pp. 911-914 ◽  
Author(s):  
Martin Mikulics ◽  
Hilde Hardtdegen ◽  
Andreas Winden ◽  
Alfred Fox ◽  
Michel Marso ◽  
...  
Keyword(s):  
Residual Strain ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Heterostructure Field Effect Transistors ◽  
Gan Heterostructure
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