JP2009059816A - Ed型インバータ回路および集積回路素子 - Google Patents
Ed型インバータ回路および集積回路素子 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 claims abstract description 106
- 239000000758 substrate Substances 0.000 claims abstract description 21
- -1 nitride compound Chemical class 0.000 claims abstract description 11
- 125000006850 spacer group Chemical group 0.000 claims description 9
- 150000004767 nitrides Chemical class 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- 239000000969 carrier Substances 0.000 claims 1
- 229910002704 AlGaN Inorganic materials 0.000 description 52
- 238000005530 etching Methods 0.000 description 11
- 230000005533 two-dimensional electron gas Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- 238000000206 photolithography Methods 0.000 description 5
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 239000002019 doping agent Substances 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 238000000059 patterning Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009616 inductively coupled plasma Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- QBJCZLXULXFYCK-UHFFFAOYSA-N magnesium;cyclopenta-1,3-diene Chemical compound [Mg+2].C1C=CC=[C-]1.C1C=CC=[C-]1 QBJCZLXULXFYCK-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- RLOWWWKZYUNIDI-UHFFFAOYSA-N phosphinic chloride Chemical compound ClP=O RLOWWWKZYUNIDI-UHFFFAOYSA-N 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
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- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
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- H01L29/772—Field effect transistors
- H01L29/778—Field effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT ; with two-dimensional charge-carrier layer formed at a heterojunction interface
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Abstract
【解決手段】基板上に形成された窒化物系化合物半導体からなる第1半導体層と、第1半導体層上に形成されるとともに、所定の位置に開口部を有し、第1半導体層よりもバンドギャップが大きい窒化物系化合物半導体からなる第2半導体層と、第2半導体層の開口部内に露出した第1半導体層の表面に形成されたゲート絶縁膜と、ゲート絶縁膜上に形成された第1ゲート電極と、第2半導体層上の第1ゲート電極を挟む位置に形成され、第2半導体層とオーミック接触する第1ソース電極および第1ドレイン電極と、第2半導体層上に形成され、第2半導体層とショットキー接触する第2ゲート電極と、第2半導体層上の第2ゲート電極を挟む位置に形成され、第2半導体層とオーミック接触する第2ソース電極および第2ドレイン電極と、を備える。
【選択図】 図1
Description
図1は本発明の実施の形態1に係るED型インバータ回路の模式的な断面図である。図1に示すように、このED型インバータ回路100は、サファイア、SiC、Siなどからなる基板101上に、AlN層とGaN層を交互に積層して形成したバッファ層102と、p−GaN層103が形成されている。さらに、p−GaN層103上には、AlGaN層104が形成されている。このAlGaN層104は、所定の位置に開口部104aを有している。
つぎに、本発明の実施の形態2について説明する。本実施の形態2に係るED型インバータ回路は、図1に示すED型インバータ回路100とほぼ同様の構造を有するが、AlGaN層と各ソース電極およびドレイン電極との間にキャリア濃度が高いキャップ層が形成されている点が異なる。
つぎに、本発明の実施の形態3について説明する。本実施の形態3に係るED型インバータ回路は、図1に示すED型インバータ回路100とほぼ同様の構造を有するが、バッファ層上にundope−GaN層が形成される点と、AlGaN層の開口部内に露出したundope−GaN層上にp−GaN層が形成され、このp−GaN層上にゲート絶縁膜が形成される点とが異なる。
つぎに、本発明の実施の形態4について説明する。本実施の形態4に係るED型インバータ回路は、図1に示すED型インバータ回路100とほぼ同様の構造を有するが、p−GaN層とAlGaN層との間にundope−GaN層を備える点が異なる。
つぎに、本発明の実施の形態5について説明する。本実施の形態5に係るED型インバータ回路は、図1に示すED型インバータ回路100とほぼ同様の構造を有するが、p−GaN層とAlGaN層との間にAlNからなるスペーサ層を備える点が異なる。
図6は、本実施の形態6に係る集積回路素子を示す回路図である。図6に示すように、この集積回路素子1000は、エンハンスメント型のMOSFETであるトランジスタT11とディプレッション型のHEMTであるトランジスタT12とが集積された実施の形態1に係るED型インバータ回路100を奇数個備え、これらのED型インバータ回路100をリング状に接続して形成したDFCL(Direct−coupled FET Logic)リングオシレータである。なお、VDDは電源電圧、Voutは出力電圧である。この集積回路素子1000は、実施の形態1に係るED型インバータ回路100から構成されており、遅延時間等の特性の制御性および高温下での信頼性が高いリングオシレータとなる。
101〜501 基板
102〜502 バッファ層
103、203、316、403、503 p−GaN層
104〜504 AlGaN層
104a〜504a、417a、518a 開口部
105〜505 ゲート絶縁膜
106〜506、109〜509 ゲート電極
107〜507、110〜510 ソース電極
108〜508、111〜511 ドレイン電極
212〜215 n+−GaN層
303、417 undope−GaN層
303a 表面
518 スペーサ層
1000 集積回路素子
T11〜T51、T12〜T52 トランジスタ
Claims (6)
- 基板上に形成された窒化物系化合物半導体からなる第1半導体層と、
前記第1半導体層上に形成されるとともに、所定の位置に開口部を有し、前記第1半導体層よりもバンドギャップが大きい窒化物系化合物半導体からなる第2半導体層と、
前記第2半導体層の開口部内に露出した第1半導体層の表面に形成されたゲート絶縁膜と、
前記ゲート絶縁膜上に形成された第1ゲート電極と、
前記第2半導体層上の前記第1ゲート電極を挟む位置に形成され、前記第2半導体層とオーミック接触する第1ソース電極および第1ドレイン電極と、
前記第2半導体層上に形成され、前記第2半導体層とショットキー接触する第2ゲート電極と、
前記第2半導体層上の前記第2ゲート電極を挟む位置に形成され、前記第2半導体層とオーミック接触する第2ソース電極および第2ドレイン電極と、
を備えることを特徴とするED型インバータ回路。 - 基板上に形成された窒化物系化合物半導体からなる第1半導体層と、
前記第1半導体層上に形成されるとともに、所定の位置に開口部を有し、前記第1半導体層よりもバンドギャップが大きい窒化物系化合物半導体からなる第2半導体層と、
前記第2半導体層の開口部内に露出した第1半導体層の表面にエピタキシャル成長により形成された窒化物系化合物半導体からなる第3半導体層と、
前記第3半導体層上に形成されたゲート絶縁膜と、
前記ゲート絶縁膜上に形成された第1ゲート電極と、
前記第2半導体層上の前記第1ゲート電極を挟む位置に形成され、前記第2半導体層とオーミック接触する第1ソース電極および第1ドレイン電極と、
前記第2半導体層上に形成され、前記第2半導体層とショットキー接触する第2ゲート電極と、
前記第2半導体層上の前記第2ゲート電極を挟む位置に形成され、前記第2半導体層とオーミック接触する第2ソース電極および第2ドレイン電極と、
を備えることを特徴とするED型インバータ回路。 - 前記第1半導体層と前記第2半導体層との間に形成され、前記第2半導体層の開口部と連接する第1連接開口部を有し、前記第1半導体層よりもキャリア濃度が低い窒化物系化合物半導体からなる第4半導体層を備えることを特徴とする請求項1または2に記載のED型インバータ回路。
- 前記第1半導体層または前記第4半導体層と前記第2半導体層との間に形成され、前記第2半導体層の開口部と連接する第2連接開口部を有し、AlNからなるスペーサ層を備えることを特徴とする請求項1〜3のいずれか1つに記載のED型インバータ回路。
- 前記第2半導体層と、前記第1ソース電極、前記第1ドレイン電極、前記第2ソース電極、および前記第2ドレイン電極の少なくとも1つとの間に形成された、前記第2半導体層よりもキャリア濃度が高いキャップ層を備えることを特徴とする請求項1〜4のいずれか1つに記載のED型インバータ回路。
- 請求項1〜5のいずれか1つに記載のED型インバータ回路を備えることを特徴とする集積回路素子。
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JP2007224605A JP4514063B2 (ja) | 2007-08-30 | 2007-08-30 | Ed型インバータ回路および集積回路素子 |
CN2008102149532A CN101378062B (zh) | 2007-08-30 | 2008-08-29 | Ed反相电路及包含ed反相电路的集成电路元件 |
US12/325,784 US7821035B2 (en) | 2007-08-30 | 2008-12-01 | ED inverter circuit and integrate circuit element including the same |
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JP2007224605A JP4514063B2 (ja) | 2007-08-30 | 2007-08-30 | Ed型インバータ回路および集積回路素子 |
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Cited By (6)
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US20110254055A1 (en) * | 2010-03-29 | 2011-10-20 | Furukawa Electric Co., Ltd. | Field effect transistor and manufacturing method thereof |
JP2012523701A (ja) * | 2009-04-08 | 2012-10-04 | エフィシエント パワー コンヴァーション コーポレーション | 補償型ゲートmisfet及びその製造方法 |
JP2012195506A (ja) * | 2011-03-17 | 2012-10-11 | Toshiba Corp | 窒化物半導体装置 |
JP2013211839A (ja) * | 2012-02-29 | 2013-10-10 | Semiconductor Energy Lab Co Ltd | 半導体装置 |
JP2013251892A (ja) * | 2012-05-02 | 2013-12-12 | Semiconductor Energy Lab Co Ltd | 半導体装置 |
JP2016028445A (ja) * | 2015-10-16 | 2016-02-25 | ローム株式会社 | 窒化物半導体装置 |
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JP5707767B2 (ja) * | 2010-07-29 | 2015-04-30 | 住友電気工業株式会社 | 半導体装置 |
KR102065115B1 (ko) * | 2010-11-05 | 2020-01-13 | 삼성전자주식회사 | E-모드를 갖는 고 전자 이동도 트랜지스터 및 그 제조방법 |
JP6130995B2 (ja) * | 2012-02-20 | 2017-05-17 | サンケン電気株式会社 | エピタキシャル基板及び半導体装置 |
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CN101378062A (zh) | 2009-03-04 |
US7821035B2 (en) | 2010-10-26 |
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