JP5640379B2 - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- JP5640379B2 JP5640379B2 JP2009298319A JP2009298319A JP5640379B2 JP 5640379 B2 JP5640379 B2 JP 5640379B2 JP 2009298319 A JP2009298319 A JP 2009298319A JP 2009298319 A JP2009298319 A JP 2009298319A JP 5640379 B2 JP5640379 B2 JP 5640379B2
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/601—Insulated-gate field-effect transistors [IGFET] having lightly-doped drain or source extensions, e.g. LDD IGFETs or DDD IGFETs
- H10D30/608—Insulated-gate field-effect transistors [IGFET] having lightly-doped drain or source extensions, e.g. LDD IGFETs or DDD IGFETs having non-planar bodies, e.g. having recessed gate electrodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/0223—Manufacture or treatment of FETs having insulated gates [IGFET] having source and drain regions or source and drain extensions self-aligned to sides of the gate
- H10D30/0225—Manufacture or treatment of FETs having insulated gates [IGFET] having source and drain regions or source and drain extensions self-aligned to sides of the gate using an initial gate mask complementary to the prospective gate location, e.g. using dummy source and drain electrodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/025—Manufacture or treatment of FETs having insulated gates [IGFET] of vertical IGFETs
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/63—Vertical IGFETs
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/791—Arrangements for exerting mechanical stress on the crystal lattice of the channel regions
- H10D30/792—Arrangements for exerting mechanical stress on the crystal lattice of the channel regions comprising applied insulating layers, e.g. stress liners
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/17—Semiconductor regions connected to electrodes not carrying current to be rectified, amplified or switched, e.g. channel regions
- H10D62/213—Channel regions of field-effect devices
- H10D62/221—Channel regions of field-effect devices of FETs
- H10D62/235—Channel regions of field-effect devices of FETs of IGFETs
- H10D62/292—Non-planar channels of IGFETs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/01—Manufacture or treatment
- H10D64/017—Manufacture or treatment using dummy gates in processes wherein at least parts of the final gates are self-aligned to the dummy gates, i.e. replacement gate processes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/01—Manufacture or treatment
- H10D64/025—Manufacture or treatment forming recessed gates, e.g. by using local oxidation
- H10D64/027—Manufacture or treatment forming recessed gates, e.g. by using local oxidation by etching at gate locations
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/20—Electrodes characterised by their shapes, relative sizes or dispositions
- H10D64/27—Electrodes not carrying the current to be rectified, amplified, oscillated or switched, e.g. gates
- H10D64/311—Gate electrodes for field-effect devices
- H10D64/411—Gate electrodes for field-effect devices for FETs
- H10D64/511—Gate electrodes for field-effect devices for FETs for IGFETs
- H10D64/512—Disposition of the gate electrodes, e.g. buried gates
- H10D64/513—Disposition of the gate electrodes, e.g. buried gates within recesses in the substrate, e.g. trench gates, groove gates or buried gates
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- Insulated Gate Type Field-Effect Transistor (AREA)
- Electrodes Of Semiconductors (AREA)
Description
1.第1実施形態(溝が矩形形状)
2.第2実施形態(溝がテーパー形状)
3.その他
(A)装置構成
図1〜図4は、本発明の第1実施形態に係る半導体装置100を示す図である。
上記の半導体装置を製造する製造方法の要部に関して説明する。
上記の半導体装置を製造する際には、まず、図5,図6に示すように、トランジスタ形成工程を実施する。
つぎに、図7,図8に示すように、平坦化膜形成工程を実施する。
つぎに、図9,図10に示すように、ダミーゲート電極・ダミーゲート絶縁膜除去工程を実施する。
つぎに、図11,図12に示すように、溝形成工程を実施する。
つぎに、図13,図14に示すように、高誘電体膜形成工程を実施する。
つぎに、図15,図16に示すように、金属膜形成工程を実施する。
つぎに、図2〜図4に示したように、ゲート電極・ゲート絶縁膜形成工程を実施して、半導体素子110を完成させる。
以上のように、本実施形態においては、半導体基板101に半導体素子110が設けられている。この半導体素子110は、電界効果トランジスタであって、ゲート絶縁膜111z,ゲート電極111g,一対のソース・ドレイン領域112s,112dを有する。半導体素子110において、ゲート絶縁膜111zは、半導体基板101の表面に設けられている。また、ゲート電極111gは、半導体基板101の表面においてゲート絶縁膜111zを介して設けられている。そして、一対のソース・ドレイン領域112s,112dは、半導体基板101においてゲート電極111gを挟むように設けられている。
つまり、一対のソース・ドレイン領域112s,112dは、凸部CVと凹部TRとの各部分において、上面が平坦であり、半導体基板101内で同じ深さまで形成されている。
本発明の第2実施形態について説明する。
図17は、本発明の第2実施形態に係る半導体装置100bを示す図である。
以上のように、本実施形態においては、第1実施形態の場合と同様に、FETである半導体素子110bにおいて、チャネルの幅方向xが凹凸形状に形成されている。このため、実効的なチャネル幅を増加させることができる。また、凹凸形状の側壁にてチャネルが形成されるので、Πゲートと同様な効果等によって、Sファクタを改善できる。
なお、上記においては、図17に示したように、溝Mbの底面が半導体基板101の表面(xy面)に対して水平に沿った場合について示したが、これに限定されない。
本発明の実施に際しては、上記の実施形態に限定されるものではなく、種々の変形形態を採用することができる。
Claims (1)
- 半導体基板の表面において半導体素子を構成するゲート絶縁膜およびゲート電極を形成する部分にダミーゲート絶縁膜を介してダミーゲート電極を形成すると共に、前記半導体素子を構成する一対のソース・ドレイン領域を、当該ダミーゲート電極を挟むように形成する第1ステップと、
前記ダミーゲート電極の上面が露出し、前記一対のソース・ドレイン領域の上面が被覆されるように前記半導体基板の表面に平坦化膜を形成する第2ステップと、
前記ダミーゲート電極および前記ダミーゲート絶縁膜を除去することによって、前記半導体基板において前記ダミーゲート電極および前記ダミーゲート絶縁膜が形成されていた表面を露出させ、当該表面部分に前記ソース・ドレイン領域に対して自己整合的な構成の開口を形成する第3ステップと、
前記半導体基板において前記ソース・ドレイン領域に対して自己整合的な構成の前記開口内における前記半導体基板の表面についてエッチング処理を実施することで、前記半導体基板において前記ゲート電極が設けられる部分の表面を凹凸面に形成し、前記半導体基板の凹凸面のうち凸部では、前記一対のソース・ドレイン領域の表面と同一の面となり、前記半導体基板の凹凸面のうち凹部では、前記一対のソース・ドレイン領域の表面から内部へ向けて溝を設ける第4ステップと、
前記半導体基板に形成された前記凹凸面を被覆するように絶縁膜を成膜することによって、前記半導体基板の凹凸面のうち凸部では、前記一対のソース・ドレイン領域の表面と同一の面を覆うように前記ゲート絶縁膜を形成し、前記半導体基板の凹凸面のうち凹部では、前記一対のソース・ドレイン領域の表面から内部へ向けて設けられた溝の面を覆うように前記ゲート絶縁膜を形成する第5ステップと、
前記凹凸面に形成されたゲート絶縁膜を被覆するように導電膜を成膜することによって、前記半導体基板の凹凸面のうち凸部では、前記ゲート絶縁膜の上面にゲート電極を形成し、前記半導体基板の凹凸面のうち凹部では、前記ゲート絶縁膜が設けられた溝の内部を埋め込むようにゲート電極を形成する第6ステップと
を有し、
前記半導体基板の凹凸面の凸部と凹部とにおいて、前記一対のソース・ドレイン領域が同一の形状になるように、かつ、前記ゲート電極に対して自己整合的に、当該一対のソース・ドレイン領域を形成する、
半導体装置の製造方法。
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009298319A JP5640379B2 (ja) | 2009-12-28 | 2009-12-28 | 半導体装置の製造方法 |
| US12/967,857 US8937349B2 (en) | 2009-12-28 | 2010-12-14 | Semiconductor component and manufacturing method thereof |
| CN2010105982465A CN102130171B (zh) | 2009-12-28 | 2010-12-21 | 半导体元件和用于制造半导体元件的方法 |
| US14/573,771 US9548360B2 (en) | 2009-12-28 | 2014-12-17 | Semiconductor component and manufacturing method thereof |
| US15/371,826 US9748384B2 (en) | 2009-12-28 | 2016-12-07 | Semiconductor component and manufacturing method thereof |
| US15/658,950 US9991383B2 (en) | 2009-12-28 | 2017-07-25 | Semiconductor component and manufacturing method thereof |
| US15/956,254 US10727335B2 (en) | 2009-12-28 | 2018-04-18 | Semiconductor component and manufacturing method thereof |
| US16/899,157 US11043590B2 (en) | 2009-12-28 | 2020-06-11 | Semiconductor component and manufacturing method thereof |
| US17/329,393 US11848380B2 (en) | 2009-12-28 | 2021-05-25 | Semiconductor component and manufacturing method thereof |
| US18/506,567 US12439630B2 (en) | 2009-12-28 | 2023-11-10 | Semiconductor component and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009298319A JP5640379B2 (ja) | 2009-12-28 | 2009-12-28 | 半導体装置の製造方法 |
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| Publication Number | Publication Date |
|---|---|
| JP2011138947A JP2011138947A (ja) | 2011-07-14 |
| JP5640379B2 true JP5640379B2 (ja) | 2014-12-17 |
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| JP2009298319A Active JP5640379B2 (ja) | 2009-12-28 | 2009-12-28 | 半導体装置の製造方法 |
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| Country | Link |
|---|---|
| US (8) | US8937349B2 (ja) |
| JP (1) | JP5640379B2 (ja) |
| CN (1) | CN102130171B (ja) |
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| CN102931235B (zh) * | 2011-08-12 | 2016-02-17 | 中芯国际集成电路制造(上海)有限公司 | Mos晶体管及其制造方法 |
| CN103000504A (zh) * | 2011-09-14 | 2013-03-27 | 中国科学院微电子研究所 | 半导体器件及其制造方法 |
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| US20110156136A1 (en) | 2011-06-30 |
| US8937349B2 (en) | 2015-01-20 |
| US10727335B2 (en) | 2020-07-28 |
| US20200303546A1 (en) | 2020-09-24 |
| US20170092762A1 (en) | 2017-03-30 |
| CN102130171A (zh) | 2011-07-20 |
| US20240088290A1 (en) | 2024-03-14 |
| US20210296496A1 (en) | 2021-09-23 |
| US11043590B2 (en) | 2021-06-22 |
| US20180240908A1 (en) | 2018-08-23 |
| CN102130171B (zh) | 2013-12-11 |
| US9991383B2 (en) | 2018-06-05 |
| US20150102402A1 (en) | 2015-04-16 |
| US11848380B2 (en) | 2023-12-19 |
| US9548360B2 (en) | 2017-01-17 |
| US12439630B2 (en) | 2025-10-07 |
| US20170330967A1 (en) | 2017-11-16 |
| JP2011138947A (ja) | 2011-07-14 |
| US9748384B2 (en) | 2017-08-29 |
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