JP5462161B2 - Iii−v族mesfetでのダマシンコンタクト製造方法 - Google Patents
Iii−v族mesfetでのダマシンコンタクト製造方法 Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
- H01L21/28506—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
- H01L21/28575—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising AIIIBV compounds
- H01L21/28587—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising AIIIBV compounds characterised by the sectional shape, e.g. T, inverted T
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Electrodes Of Semiconductors (AREA)
- Junction Field-Effect Transistors (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
Description
・絶縁体(dielectric)スタックを堆積すること。
・絶縁体スタックに少なくとも1つの孔を設けること。
・少なくとも1つの孔に導電材料を充填すること。
・導電材料層を堆積すること。
・少なくとも1つの孔の外側にある余分な導電材料を除去すること。
・300℃〜500℃の温度で脱ガス(degas)を行うこと。
・ArプラズマまたはH2/N2リアクティブ・プレクリーン(reactive pre-clean)を用いて少なくとも1つの孔をクリーニングすること。
上述のように、れらの材料の堆積がダマシン技術について最適化され、即ち、20nm〜100nmの幅を持つ小さな孔または溝を充填するのに最適化されている場合、ゲートコンタクト10aと下地のHEMTの間にショットキーコンタクトを形成することは容易ではない。
ダマシンプロセスを用いてAlGaN/GaN HEMTの上にTaN/Cuオーミックコンタクトをさらに形成する実現可能性を示すために、上記実験で説明したものと同様な実験を行った。この場合、ソースおよびドレインコンタクト7を形成するために、80%のTaと20%のNを持つ、非化学量論的でTaリッチのTaNで用いた。窒素雰囲気、500℃、60秒のアニール工程の後、図5に示すようなオーミック挙動が観測された。
熱膨張および格子不整合を克服するために、GaNバッファ層2を備えた8インチまたは200mmのSi(111)基板1の上に、低圧有機金属化学気相成長(MOCVD)プロセスを用いて、AlGaN/GaNヘテロ構造を成長させる。これは、第1の実験について記載したように行った。
Claims (10)
- III−V族MESFET上にコンタクトを製造する方法であって、
第1および第2メインコンタクト(7)を設けることと、
その後、制御コンタクト(10a,22)を設けることとを含み、
第1および第2メインコンタクト(7)を設けることは、ダマシンプロセスを用いてオーミックコンタクトを形成するように行われ、
制御コンタクト(10a,22)を設けることは、
・絶縁体スタック(11)を堆積すること、
・絶縁体スタック(11)に少なくとも1つの孔(8)を設けること、
・少なくとも1つの孔(8)に導電材料を充填すること、および
・ダマシンプロセスを用いてT字状の形状を有するショットキーコンタクトを形成すること、によって行われ、
少なくとも1つの孔(8)に導電材料を充填することは、
・孔(8)のクリーニングを行うこと、
・孔(8)に導電材料層(10)を堆積すること、および
・少なくとも1つの孔(8)の外側にある余分な導電材料を除去すること、によって行われ、
孔(8)のクリーニング工程は、
・300℃〜500℃の温度で脱ガスを行うこと、および
・H 2 /Heリアクティブ・プレクリーンを用いて孔(8)をクリーニングすること、を含む方法。 - T字状の制御コンタクト(22)は、デュアルダマシンプロセスを用いて設けられる請求項1記載の方法。
- 余分な導電材料を除去することは、化学機械研磨によって行われる請求項1記載の方法。
- 導電材料層(10)を堆積する前に、下地層内の導電材料の拡散を防止したり、絶縁体スタック上での導電材料の接着性を改善したり、及び/又は、少なくとも1つの孔(8)への導電材料の充填を改善するためのバリア層(9)を堆積することをさらに含む請求項1記載の方法。
- バリア層(9)は、TiおよびTiNを含むグループから選ばれた1つ又はそれ以上の材料を含み、前記導電材料は、Alを含む請求項4記載の方法。
- バリア層(9)は、TaおよびTaNを含むグループから選ばれた1つ又はそれ以上の材料を含み、導電材料は、Cuを含む請求項4記載の方法。
- 少なくとも1つの孔(8)を設ける前に、絶縁体スタック(11)を平坦化することをさらに含む請求項1〜6のいずれかに記載の方法。
- 絶縁体スタック(11)を平坦化することは、化学機械研磨によって行われる請求項7記載の方法。
- 絶縁体スタック(11)は、SiN,SiO2およびSiCからなるグループから選ばれた少なくとも1つの材料を含む請求項1〜8のいずれかに記載の方法。
- 請求項1〜9のいずれかに記載の方法用いて、制御コンタクト(10a,22)をゲートコンタクトとして形成することによって、高電子移動度トランジスタを製造する方法。
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PCT/BE2007/000084 WO2009012536A1 (en) | 2007-07-20 | 2007-07-20 | Damascene contacts on iii-v cmos devices |
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JP2010533987A JP2010533987A (ja) | 2010-10-28 |
JP5462161B2 true JP5462161B2 (ja) | 2014-04-02 |
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Country | Link |
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US (1) | US8492261B2 (ja) |
EP (1) | EP2176880A1 (ja) |
JP (1) | JP5462161B2 (ja) |
WO (1) | WO2009012536A1 (ja) |
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-
2007
- 2007-07-20 JP JP2010517237A patent/JP5462161B2/ja active Active
- 2007-07-20 EP EP07784901A patent/EP2176880A1/en not_active Withdrawn
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102014018543B4 (de) | 2014-12-12 | 2024-05-08 | Siempelkamp Maschinen- Und Anlagenbau Gmbh | Verfahren zur Herstellung von Rohren |
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JP2010533987A (ja) | 2010-10-28 |
US8492261B2 (en) | 2013-07-23 |
WO2009012536A1 (en) | 2009-01-29 |
US20100176421A1 (en) | 2010-07-15 |
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