Presentation 2006-10-05
RF characteristics of AlGaN/GaN-HEMTs on Si substrates
Hideyuki OKITA, Juro MITA, Yoshiaki SANO, Toshiharu MARUI, Masanori ITO, Shinichi HOSHI, Fumihiko TODA, Shohei SEKI, Takashi EGAWA,
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Abstract(in English) AlGaN/GaN-HEMTs (High Electron Mobility Transistors) on Silicon substrate, with recessed ohmic and recessed gate electrodes were fabricated. By optimizing ohmic and gate recess depth, we obtained a superior maximum extrinsic trans-conductance (g_) of 400mS/mm, having a gate length of 1μm. Three terminals off-state breakdown voltage was 200V. HEMTs with gate length 0.2μm exhibited maximum unity current cut-off frequency (f_T) of 56GHz, and the maximum oscillation frequency (f_) of 115GHz. To determine the shift and uniformity of threshold voltage (V_) by gate recessing, stepper exposure technique with fine alignment accuracy was used to fabricate AlGaN/GaN-HEMT on 3 inches Si substrate. To minimize difference of wafers, we made gate recessed part in the half, and non-gate recessed part in the other half, in the same wafer. As a result, we found that, the standard deviation of V_, in recessed and non-recessed part, was 43mV and 75mV respectively, which were very small. We also fabricated HEMTs with gate length of 0.7μm, with gate width of 840μm(420μm×2). From the load-pull power measurement at 2.14GHz, Vds of 50V bias, saturated output power (P_) was 6.1W (7.2W/mm).
Keyword(in Japanese) (See Japanese page)
Keyword(in English) AlGaN/GaN-HEMT / Si substrate / recessed ohmic / recessed gate / RF characteristics / Uniformity
Paper # ED2006-154,CPM2006-91,LQE2006-58
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Conference Information
Committee LQE
Conference Date 2006/9/28(1days)
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Registration To Lasers and Quantum Electronics (LQE)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) RF characteristics of AlGaN/GaN-HEMTs on Si substrates
Sub Title (in English)
Keyword(1) AlGaN/GaN-HEMT
Keyword(2) Si substrate
Keyword(3) recessed ohmic
Keyword(4) recessed gate
Keyword(5) RF characteristics
Keyword(6) Uniformity
1st Author's Name Hideyuki OKITA
1st Author's Affiliation Research & Development Group, Oki Electric Industry Co., Ltd.()
2nd Author's Name Juro MITA
2nd Author's Affiliation Research & Development Group, Oki Electric Industry Co., Ltd.
3rd Author's Name Yoshiaki SANO
3rd Author's Affiliation Research & Development Group, Oki Electric Industry Co., Ltd.
4th Author's Name Toshiharu MARUI
4th Author's Affiliation Research & Development Group, Oki Electric Industry Co., Ltd.
5th Author's Name Masanori ITO
5th Author's Affiliation Research & Development Group, Oki Electric Industry Co., Ltd.
6th Author's Name Shinichi HOSHI
6th Author's Affiliation Research & Development Group, Oki Electric Industry Co., Ltd.
7th Author's Name Fumihiko TODA
7th Author's Affiliation Research & Development Group, Oki Electric Industry Co., Ltd.
8th Author's Name Shohei SEKI
8th Author's Affiliation Research & Development Group, Oki Electric Industry Co., Ltd.
9th Author's Name Takashi EGAWA
9th Author's Affiliation Research Center for Nano-Device and System, Nagoya Institute of Technology
Date 2006-10-05
Paper # ED2006-154,CPM2006-91,LQE2006-58
Volume (vol) vol.106
Number (no) 271
Page pp.pp.-
#Pages 6
Date of Issue