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GaN-Based Super Heterojunction Field Effect Transistors Using the Polarization Junction Concept

GaN-Based Super Heterojunction Field Effect Transistors Using the Polarization Junction Concept,10.1109/LED.2011.2105242,IEEE Electron Device Letters,

GaN-Based Super Heterojunction Field Effect Transistors Using the Polarization Junction Concept   (Citations: 1)
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GaN super heterojunction field effect transistors (super HFET) based on the polarization junction concept are demonstrated for the first time. The super HFET has charges of 2-D electron gas and hole gas, respectively induced by positive and negative polarization charges at GaN/AlGaN/GaN hetero- interfaces. Analogous to the RESURF concept, these unintention- ally doped positive and negative polarization charges compensate each other in the OFF state condition to enhance the breakdown capability of the super HFET. The super HFETs have been fab- ricated on sapphire substrates and the electrical measurements show breakdown voltages over 1.1 kV with specific on-resistance of 6.1 mΩ · cm 2 . Index Terms—GaN, polarization junction (PJ), super junction, 2-D hole gas.
Journal: IEEE Electron Device Letters - IEEE ELECTRON DEV LETT , vol. 32, no. 4, pp. 542-544, 2011
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    • ...Recently, we have developed novel GaN wafers for PJ devices [9] and reported the first demonstration of GaN-HFETs based on the PJ concept, named Super HFETs [10]...
    • ...However, the base can be electrically connected to the gate electrode as reported in [10] or to the source electrode to form three-terminal devices, as explained in this study...
    • ...From the on-state and off-state characteristics, a relationship between Ron⋅A and BV of the fabricated Super HEMTs is plotted in Fig. 7. In the same plot, relationships of the other reported conventional GaN-based HFETs with FP technologies [2-4], gate injection transistors reported in [13], and Super HFETs with base connected to gate [10] are shown...

    Akira Nakajimaet al. GaN based Super HFETs over 700V using the polarization junction concep...

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