JP2019009308A - 半導体装置 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 79
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 131
- 239000000758 substrate Substances 0.000 claims description 24
- 239000011229 interlayer Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 229910002601 GaN Inorganic materials 0.000 description 74
- 229910002704 AlGaN Inorganic materials 0.000 description 29
- 239000000969 carrier Substances 0.000 description 9
- 230000005684 electric field Effects 0.000 description 7
- 230000007547 defect Effects 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000003071 parasitic effect Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005468 ion implantation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- RNQKDQAVIXDKAG-UHFFFAOYSA-N aluminum gallium Chemical compound [Al].[Ga] RNQKDQAVIXDKAG-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000005533 two-dimensional electron gas Effects 0.000 description 1
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Abstract
Description
第1実施形態における半導体装置について、図1〜図5を参照して説明する。本実施形態の半導体装置は、図1に示されるように、活性領域1と当該活性領域1を囲む不活性領域2とを有している。そして、活性領域1には、図2に示されるように、4端子構造のHEMTを備えたスイッチングデバイスが形成されている。なお、特に限定されるものではないが、本実施形態では、活性領域1は、図1中の紙面上下方向を長手方向とする略長方形状とされている。
本発明の第2実施形態について説明する。本実施形態は、第1実施形態に対してJG電極21の配置箇所を変更したものであり、その他に関しては第1実施形態と同様であるため、第1実施形態と異なる部分についてのみ説明する。
本発明の第3実施形態について説明する。本実施形態は、第2実施形態に対してJG電極21の配置箇所を変更したものであり、その他に関しては第2実施形態と同様であるため、第2実施形態と異なる部分についてのみ説明する。
本発明は上記した実施形態に限定されるものではなく、特許請求の範囲に記載した範囲内において適宜変更が可能である。
2 不活性領域
11 基板
12 u−GaN層
13 u−AlGaN層
14 u−GaN層
17 MOSゲート電極
18 ソース電極
19 ドレイン電極
20 p−GaN層
21 JG電極
Claims (5)
- 活性領域(1)と、当該活性領域を囲む不活性領域(2)とを有し、前記活性領域に横型のスイッチングデバイスが形成された半導体装置であって、
前記活性領域は、
基板(11)上に形成され、ドリフト領域を構成する第1のGaN系半導体にて構成された第1半導体層(12)および前記第1のGaN系半導体よりもバンドギャップエネルギーが大きい第2のGaN系半導体にて構成された第2半導体層(13)にて構成されるヘテロジャンクション構造を有し、前記第2半導体層にリセス部(15)が形成されたチャネル形成層(12、13)と、
前記リセス部内に形成されたゲート絶縁膜(16)および当該ゲート絶縁膜の上に形成されたMOS構造のゲート電極となるMOSゲート電極(17)を有するゲート構造部と、
前記第2半導体層の上において、前記ゲート構造部を挟んだ両側に配置されたソース電極(18)およびドレイン電極(19)と、
前記第2半導体層の上において、前記ゲート構造部と前記ドレイン電極との間における前記ドレイン電極から離れた位置に配置され、不純物がドープされていない第3のGaN系半導体にて構成された第3半導体層(14)と、
前記第3半導体層の上に形成されたp型の第4のGaN系半導体によって構成された第4半導体層(20)と、
前記第4半導体層に接触させられたジャンクションゲート電極(21)と、を備えるスイッチングデバイスを有し、
前記ジャンクションゲート電極は、前記ソース電極と電気的に接続されて当該ソース電極と同電位とされ、かつ前記活性領域内にのみ配置されている半導体装置。 - 前記ジャンクションゲート電極は、前記ドレイン電極を囲む環状とされている請求項1に記載の半導体装置。
- 前記ドレイン電極は、前記不活性領域に形成されたドレインパッド(27)と、前記活性領域から前記不活性領域まで延設されたドレイン配線(27a)を介して接続されており、
前記ジャンクションゲート電極は、前記ドレイン配線と異なる位置であって、前記ドレイン電極を囲むように配置されている請求項1に記載の半導体装置。 - 前記ソース電極は、前記不活性領域に形成されたソースパッド(26)と、前記活性領域から前記不活性領域まで延設されたソース配線(26a)を介して接続されており、
前記ドレイン電極は、前記不活性領域に形成されたドレインパッド(27)と、前記活性領域から前記不活性領域まで延設されたドレイン配線(27a)を介して接続されており、
前記ジャンクションゲート電極は、前記ソース電極、前記ソースパッドおよび前記ソース配線と、前記ドレイン電極、前記ドレインパッド、および前記ドレイン配線との全ての間に位置するように配置されている請求項1に記載の半導体装置。 - 前記ジャンクションゲート電極は、前記MOSゲート電極を覆う層間絶縁膜(22)の上に形成される電極層(23)を介して連結され、前記ソース電極と一体化されている請求項1ないし4のいずれか1つに記載の半導体装置。
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JP2017124349A JP6769400B2 (ja) | 2017-06-26 | 2017-06-26 | 半導体装置 |
CN201880042217.5A CN110785836B (zh) | 2017-06-26 | 2018-05-25 | 半导体装置 |
PCT/JP2018/020230 WO2019003746A1 (ja) | 2017-06-26 | 2018-05-25 | 半導体装置 |
US16/693,598 US11056584B2 (en) | 2017-06-26 | 2019-11-25 | Semiconductor device |
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Cited By (2)
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JP2020194919A (ja) * | 2019-05-29 | 2020-12-03 | 株式会社デンソー | 半導体装置 |
JP2021089934A (ja) * | 2019-12-03 | 2021-06-10 | 株式会社東芝 | 半導体装置 |
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US10529802B2 (en) * | 2017-09-14 | 2020-01-07 | Gan Systems Inc. | Scalable circuit-under-pad device topologies for lateral GaN power transistors |
DE102020112069B4 (de) * | 2020-02-27 | 2022-03-03 | Taiwan Semiconductor Manufacturing Co. Ltd. | Source-leckstromunterdrückung durch source-umgebende gate-struktur und verfahren zur herstellung der gate-struktur |
US20220216332A1 (en) * | 2021-01-07 | 2022-07-07 | Semiconductor Components Industries, Llc | Non-linear hemt devices |
US11664431B2 (en) * | 2021-01-08 | 2023-05-30 | Taiwan Semiconductor Manufacturing Company, Ltd. | Ring transistor structure |
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