Suppression of self-heating effect in AlGaN/GaN high electron mobility transistors by substrate-transfer technology using h-BN

Masanobu Hiroki, Kazuhide Kumakura, Yasuyuki Kobayashi, Tetsuya Akasaka, Toshiki Makimoto, Hideki Yamamoto

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    Abstract

    We fabricated AlGaN/GaN high electron mobility transistors (HEMTs) on h-BN/sapphire substrates and transferred them from the host substrates to copper plates using h-BN as a release layer. In current-voltage characteristics, the saturation drain current decreased by about 30% under a high-bias condition before release by self-heating effect. In contrast, after transfer, the current decrement was as small as 8% owing to improved heat dissipation: the device temperature increased to 50°C in the as-prepared HEMT, but only by several degrees in the transferred HEMT. An effective way to improve AlGaN/GaN HEMT performance by a suppression of self-heating effect has been demonstrated.

    Original languageEnglish
    Article number193509
    JournalApplied Physics Letters
    Volume105
    Issue number19
    DOIs
    Publication statusPublished - 2014 Nov 10

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    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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