WO2005055304A1 - プラズマ発生器及びプラズマエッチング装置 - Google Patents
プラズマ発生器及びプラズマエッチング装置 Download PDFInfo
- Publication number
- WO2005055304A1 WO2005055304A1 PCT/JP2004/017725 JP2004017725W WO2005055304A1 WO 2005055304 A1 WO2005055304 A1 WO 2005055304A1 JP 2004017725 W JP2004017725 W JP 2004017725W WO 2005055304 A1 WO2005055304 A1 WO 2005055304A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plasma
- coil
- sample
- winding
- plasma generator
- Prior art date
Links
- 238000001020 plasma etching Methods 0.000 title claims abstract description 21
- 238000004804 winding Methods 0.000 claims abstract description 64
- 238000005530 etching Methods 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 22
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000000758 substrate Substances 0.000 abstract description 9
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000001312 dry etching Methods 0.000 description 3
- 238000009616 inductively coupled plasma Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/321—Radio frequency generated discharge the radio frequency energy being inductively coupled to the plasma
- H01J37/3211—Antennas, e.g. particular shapes of coils
-
- 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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/3065—Plasma etching; Reactive-ion etching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/321—Radio frequency generated discharge the radio frequency energy being inductively coupled to the plasma
Definitions
- the present invention relates to a plasma generator that generates plasma in a cylinder around which a coil is wound, and a plasma etching apparatus that performs dry etching on a sample using plasma.
- dry etching using plasma has been widely used in the past (for example, see Patent Documents 1 to 3).
- dry etching using plasma low-pressure process gas plasma is generated in a reduced-pressure atmosphere, and the sample is etched by the generated plasma.
- an AC voltage is applied to a coil to generate plasma, and an AC voltage is applied to a substrate electrode on which a sample is placed, and the plasma is generated.
- the generated plasma is drawn in, and etching is performed by the drawn-in plasma.
- a plasma is considered as a single-turn lossy conductor, and is coupled to a non-resonant high-frequency coil wound many times around a dielectric discharge chamber. Therefore, a method is known in which high-frequency power is inductively coupled to plasma by a transformer operation. This inductively coupled plasma generation method can generate high-density plasma with a relatively low-cost configuration.
- FIG. 5 is a configuration diagram of such a conventional plasma etching apparatus.
- reference numeral 31 denotes a reactor, which comprises an upper plasma generation chamber 32a for generating plasma and a lower reaction chamber 32b for performing plasma treatment on a sample 50 by injecting the generated plasma into the bow I.
- a reactor which comprises an upper plasma generation chamber 32a for generating plasma and a lower reaction chamber 32b for performing plasma treatment on a sample 50 by injecting the generated plasma into the bow I.
- a coil 33 is concentrically wound on the outer surface of the cylindrical plasma generation chamber 32a by a plurality of turns in a uniform spiral shape.
- Power supply 40 is connected.
- a magnetic field generating coil 38 is provided around the plasma generation chamber 32a.
- a gas introduction pipe 34 for introducing a process gas into the reactor 31 is connected to the plasma generation chamber 32a.
- a platen 37 having a substrate electrode 36 on which a sample 50 to be etched is placed is provided at the bottom of the reaction chamber 32b.
- a high-frequency AC power supply 42 is connected to the substrate electrode 36 via a matching unit 41. Further, an exhaust port 35 is opened in the reaction chamber 32b.
- the inside of the reactor 31 is evacuated through the exhaust port 35 while introducing the process gas from the gas introduction pipe 34 into the plasma generation chamber 32a.
- a high-frequency AC voltage to the coil 33 while maintaining the inside of the plasma generation chamber 32a at a predetermined pressure, plasma of the process gas is generated and maintained.
- the plasma is spread in a direction perpendicular to the axis of the plasma generation chamber 32a by passing a DC current through the DC magnetic field generating coil 38.
- the plasma generated in the plasma generation chamber 32a is drawn into the reaction chamber 32b by the application of the AC voltage to the substrate electrode 36, and the sample 50 is etched by the plasma captured by the bow I. .
- Patent Document 1 Japanese Patent Application Laid-Open No. 7-320894
- Patent Document 2 JP-A-10-270193
- Patent Document 3 Japanese Patent Application Laid-Open No. 2000-30893
- FIG. 6 is a diagram showing a positional relationship between the plasma generator (coil 33) and the sample 50 in this conventional example. Since the coil 33 is wound spirally uniformly, the distance (Dl, D2) between the plasma generation region and the sample 50 indicated by the broken line is different in the circumferential direction of the sample 50 (D1 ⁇ D2). As a result, the etching rate was large in the area of the sample 50 where the distance (D1) was short, and the etching rate was low in the area of the sample 50 where the distance (D2) was long. Therefore, the etching rate of the sample 50 becomes uneven in the circumferential direction. As a result, uniform etching cannot be performed in the circumferential direction.
- the coil 33 must be wound at a pitch of a predetermined distance or more so as not to generate a discharge between the adjacent coils 33. Therefore, when the coil 33 is wound in a uniform spiral shape, as described above, The difference in the circumferential distance between the plasma generation region and the sample 50 is inevitable.
- the present invention has been made in view of such circumstances, and uses a plasma generator capable of generating plasma for making the etching speed uniform in the circumferential direction of a sample, and using the plasma generator. It is an object of the present invention to provide a plasma etching apparatus capable of performing a uniform etching process in the circumferential direction of a sample.
- a plasma generator includes a cylindrical body, and a coil wound around a peripheral surface of the cylindrical body.
- a process gas is introduced into the cylindrical body, and an alternating current is applied to the coil.
- the plasma generator having one winding of the coil, and the winding direction and a surface perpendicular to the axis of the cylinder.
- the coil is not wound around the outer periphery of the cylinder (plasma generation chamber) in a uniform spiral, that is, perpendicular to the winding direction and the axis of the cylinder (plasma generation chamber).
- the first winding area has an angle within a predetermined range
- the second winding area has an angle larger than the first winding area.
- the coil is wound around the outer periphery of the cylindrical body (plasma generation chamber).
- FIG. 7 is a diagram showing a positional relationship between a plasma generator (coil) and a sample in the example of the present invention.
- the predetermined range has an absolute value.
- the predetermined range has an absolute value of 1.5 degrees or less, and the winding direction in the first winding region is made as horizontal as possible. Therefore, there is almost no difference in the etching speed in the circumferential direction of the sample.
- a plasma generator according to a third aspect of the present invention is the plasma generator according to the first aspect, wherein a ratio of the first winding region to the entire circumference of the cylindrical body is 75% or more.
- the proportion of the first winding region is set to 75% or more, and the first winding region in which the winding direction is horizontal or substantially horizontal is made as large as possible. Therefore, the area where the difference in the etching rate does not occur is widened.
- the pitch of the wound coils is equal to or longer than a distance at which no discharge occurs between adjacent coils.
- a plasma etching apparatus is a plasma etching apparatus for performing etching of a sample with plasma, comprising the plasma generator according to any one of the first to fourth aspects of the invention.
- a plasma of a process gas generated by the plasma generator is used.
- the etching rate in the circumferential direction of the sample is the same, and a uniform etching shape is obtained.
- the angle between the winding direction and the plane perpendicular to the axis of the cylinder (plasma generation chamber) is not uniform, and the coil is formed so as to be horizontal or substantially horizontal. Since it is wound around the outer periphery of the (plasma generation chamber), the distance between the plasma generation region and the sample can be made equal or substantially equal in the circumferential direction of the sample. Therefore, this plasma generation When the apparatus is applied to a plasma etching apparatus, the etching rate in the circumferential direction of the sample can be made the same, and a uniform etching shape in the circumferential direction can be obtained.
- the winding direction of the coil in the first winding region is set to a horizontal or substantially horizontal direction. Accordingly, the effects of the present invention as described above can be exhibited.
- the ratio of the first winding area is set to 75% or more, so that a large area where the coil is horizontal or substantially horizontal can be obtained. The effects of the present invention can be exhibited.
- plasma generated so that the distance between the plasma generation region and the sample is equal in the circumferential direction of the sample is used, so that etching in the circumferential direction of the sample is performed.
- the speed can be made uniform, and a uniform etched shape can be obtained.
- FIG. 1 is a configuration diagram of a plasma etching apparatus using a plasma generator according to the present invention.
- FIG. 2 is a view showing a measurement position of an etching rate in a sample.
- FIG. 3 is a chart and a graph showing measurement results of an etching rate when a sample is etched using a conventional plasma etching apparatus.
- FIG. 4 is a chart and a graph showing measurement results of an etching rate when a sample is etched using the plasma etching apparatus of the present invention.
- FIG. 5 is a configuration diagram of a plasma etching apparatus using a conventional plasma generator.
- FIG. 6 is a diagram showing a positional relationship between a plasma generator (coil) and a sample when a conventional plasma generator is used.
- FIG. 7 is a diagram showing a positional relationship between a plasma generator (coil) and a sample when the plasma generator of the present invention is used. Explanation of reference numerals
- FIG. 1 is a configuration diagram of a plasma etching apparatus using a plasma generator according to the present invention.
- reference numeral 1 denotes a reactor, an upper plasma generation chamber 2a for generating plasma by energizing the coil 3, and a lower reaction for drawing the generated plasma and performing plasma processing on a sample 20.
- Room 2b room 2b.
- a coil 3 is wound around the outer surface of the cylindrical plasma generation chamber 2a non-uniformly for a plurality of turns (for example, three turns). The winding form of the coil 3 will be described later in detail.
- a high frequency AC power supply 10 is connected to the coil 3 via a matching unit 9.
- a DC magnetic field generating coil 8 for spreading the plasma in a direction perpendicular to the axis of the plasma generation chamber 2a is provided.
- the plasma generation chamber 2 a is connected to a process gas source (not shown) and communicates with a gas introduction pipe 4 for introducing a process gas into the reactor 1.
- the reaction chamber 2b is provided with an exhaust port 5 to which an exhaust device (not shown) is connected.
- an exhaust device not shown
- a platen 7 having a substrate electrode 6 on which a sample 20 to be etched is placed is provided at the bottom of the reaction chamber 2b. High-frequency alternating current is applied to the substrate electrode 6 via the matching unit 11. Power supply 12 is connected.
- the inside of the reactor 1 is evacuated through the exhaust port 5 while introducing the process gas from the gas introduction pipe 4 into the plasma generation chamber 2a.
- a high-frequency AC voltage to the coil 3 while maintaining the inside of the plasma generation chamber 2a at a predetermined pressure, plasma of the process gas is generated and maintained.
- the plasma is spread in a direction perpendicular to the axis of the plasma generation chamber 2a by passing a DC current through the DC magnetic field generating coil 8.
- the plasma generated in the plasma generation chamber 2a is drawn into the reaction chamber 2b by the application of the AC voltage to the substrate electrode 6, and the sample 20 is etched by the plasma injected into the reaction chamber 2b.
- the basic configuration of the plasma generator of the present invention shown in FIG. 1 and the above-described conventional plasma generator shown in FIG. 5 are the same, and the principle of plasma generation is also the same.
- the shape of the coil wound around the plasma generation chamber is greatly different. If the coils are wound too tightly, discharge occurs between the adjacent coils. Therefore, it is necessary to wind the coils so that the adjacent coils are separated by a predetermined distance or more.
- the coil 33 is uniformly spirally wound around the peripheral surface of the plasma generation chamber 32a. Therefore, the angle between the plane perpendicular to the axis of the plasma generation chamber 32a and the winding direction of the coil 33 becomes equal everywhere.
- the coil 3 is not wound in a uniform spiral shape, and in one turn, the coil 3 is in a horizontal direction or a substantially horizontal direction.
- the coil 3 in the first winding area 3a, the coil 3 is wound so that the angle between the plane perpendicular to the axis of the plasma generation chamber 2a and the winding direction of the coil 3 is within a predetermined range.
- the second winding region 3b the coil 3 is wound with a larger inclination.
- the ratio of the first winding region 3a to the entire circumference of the plasma generation chamber 2a is larger than the ratio of the second winding region 3b.
- FIGS. 3A and 3B show measurement results in the conventional example
- FIGS. 4A and 4B show measurement results in the present invention example.
- FIGS. 3 (a) and 4 (a) show the measured values of the etching rate in tabular form, and the values in the upper column indicate the distance from the central force of the sample (the direction of the arrow in FIG.
- FIGS. 3 (b) and 4 (b) show the measured values of the etching rate in a graph format, and the horizontal axis represents the distance between the center force of the sample (the direction of the arrow in FIG. mm), and the vertical axis represents the etching rate (A / min).
- the winding form of the coil 3 shown in FIG. 1 of the present invention will be additionally described.
- the coil 3 is wound horizontally in the first winding area 3a, that is, the plane perpendicular to the axis of the plasma generation chamber 2a and the winding direction of the coil 3 Is preferably 0 degree.
- the inclination of the coil 3 is a value close to 100%.
- volume 1 The effect unique to the present invention can be obtained when the ratio of the gyration region 3a to the whole is 75% or more.
- the winding form (horizontality) of the coil 3 in the first winding area 3a is determined by the angle between the plane perpendicular to the axis of the plasma generation chamber 2a and the winding direction of the coil 3.
- the winding form (horizontality) of the coil 3 in the first winding region 3a may be defined by the amount by which the coil 3 moves in the height direction in one turn. In this case, if the amount of movement in the height direction in the first winding area 3a in one turn is 10 mm or less, the above-described effects unique to the present invention can be obtained.
- the first turn area 3 a and the second turn area 3 b are provided one by one.
- the first winding area 3a and Z that are horizontal or substantially horizontal or the second winding area 3b with a large inclination may be provided at a plurality of locations.
- the angle between the surface perpendicular to the axis of the plasma generation chamber 2a and the winding direction of the coil 3 is uniform and one kind.
- the angles may be made to differ by a plurality of types.
- the angle in the second winding area 3b is larger than the maximum angle in the first winding area 3a.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Plasma Technology (AREA)
- Drying Of Semiconductors (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020067012450A KR101176583B1 (ko) | 2003-12-02 | 2004-11-29 | 플라즈마 발생기 및 플라즈마 에칭 장치 |
US10/596,161 US20070086143A1 (en) | 2003-12-02 | 2004-11-29 | Plasma generator and plasma etching apparatus |
EP04819806A EP1699076A4 (en) | 2003-12-02 | 2004-11-29 | PLASMA GENERATOR AND PLASMA SETUP DEVICE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-403616 | 2003-12-02 | ||
JP2003403616A JP2005166950A (ja) | 2003-12-02 | 2003-12-02 | プラズマ発生器及びプラズマエッチング装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005055304A1 true WO2005055304A1 (ja) | 2005-06-16 |
Family
ID=34650075
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/017725 WO2005055304A1 (ja) | 2003-12-02 | 2004-11-29 | プラズマ発生器及びプラズマエッチング装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070086143A1 (ja) |
EP (1) | EP1699076A4 (ja) |
JP (1) | JP2005166950A (ja) |
KR (1) | KR101176583B1 (ja) |
WO (1) | WO2005055304A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100405878C (zh) * | 2005-12-07 | 2008-07-23 | 北京北方微电子基地设备工艺研究中心有限责任公司 | 等离子体刻蚀装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2976440B1 (fr) * | 2011-06-09 | 2014-01-17 | Ecole Polytech | Procede et agencement pour engendrer un jet de fluide, procede et systeme de transformation du jet en un plasma et applications de ce systeme |
KR102654925B1 (ko) | 2016-06-21 | 2024-04-05 | 삼성디스플레이 주식회사 | 디스플레이 장치 및 이의 제조 방법 |
US11456159B2 (en) * | 2019-10-25 | 2022-09-27 | Xia Tai Xin Semiconductor (Qing Dao) Ltd. | Plasma processing system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10149788A (ja) * | 1996-11-19 | 1998-06-02 | Hitachi Ltd | 半導体デバイスの製造方法及び処理方法並びにヘリコン波プラズマ型イオン源及び集束イオンビーム装置 |
JP2003224110A (ja) * | 2002-01-29 | 2003-08-08 | Fujitsu Ltd | 誘導結合型プラズマ装置 |
JP2003234293A (ja) * | 2002-02-06 | 2003-08-22 | Canon Inc | ヘリコン波プラズマ装置及びヘリコン波プラズマ処理方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3458912B2 (ja) * | 1994-11-15 | 2003-10-20 | アネルバ株式会社 | プラズマ処理装置 |
JP3889918B2 (ja) * | 2000-08-25 | 2007-03-07 | 富士通株式会社 | プラズマエッチング方法、プラズマエッチング装置及びプラズマ処理装置 |
US20020170677A1 (en) * | 2001-04-07 | 2002-11-21 | Tucker Steven D. | RF power process apparatus and methods |
US7513971B2 (en) * | 2002-03-18 | 2009-04-07 | Applied Materials, Inc. | Flat style coil for improved precision etch uniformity |
-
2003
- 2003-12-02 JP JP2003403616A patent/JP2005166950A/ja active Pending
-
2004
- 2004-11-29 US US10/596,161 patent/US20070086143A1/en not_active Abandoned
- 2004-11-29 WO PCT/JP2004/017725 patent/WO2005055304A1/ja not_active Application Discontinuation
- 2004-11-29 KR KR1020067012450A patent/KR101176583B1/ko active IP Right Grant
- 2004-11-29 EP EP04819806A patent/EP1699076A4/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10149788A (ja) * | 1996-11-19 | 1998-06-02 | Hitachi Ltd | 半導体デバイスの製造方法及び処理方法並びにヘリコン波プラズマ型イオン源及び集束イオンビーム装置 |
JP2003224110A (ja) * | 2002-01-29 | 2003-08-08 | Fujitsu Ltd | 誘導結合型プラズマ装置 |
JP2003234293A (ja) * | 2002-02-06 | 2003-08-22 | Canon Inc | ヘリコン波プラズマ装置及びヘリコン波プラズマ処理方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1699076A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100405878C (zh) * | 2005-12-07 | 2008-07-23 | 北京北方微电子基地设备工艺研究中心有限责任公司 | 等离子体刻蚀装置 |
Also Published As
Publication number | Publication date |
---|---|
KR20060127008A (ko) | 2006-12-11 |
US20070086143A1 (en) | 2007-04-19 |
KR101176583B1 (ko) | 2012-08-23 |
EP1699076A4 (en) | 2010-01-13 |
EP1699076A1 (en) | 2006-09-06 |
JP2005166950A (ja) | 2005-06-23 |
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