WO1993001134A1 - Method of producing pure water, system therefor and cleaning method - Google Patents
Method of producing pure water, system therefor and cleaning method Download PDFInfo
- Publication number
- WO1993001134A1 WO1993001134A1 PCT/JP1992/000837 JP9200837W WO9301134A1 WO 1993001134 A1 WO1993001134 A1 WO 1993001134A1 JP 9200837 W JP9200837 W JP 9200837W WO 9301134 A1 WO9301134 A1 WO 9301134A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pure water
- catalyst
- water
- contact
- cleaning
- Prior art date
Links
Classifications
-
- 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
- H01L21/02041—Cleaning
- H01L21/02043—Cleaning before device manufacture, i.e. Begin-Of-Line process
- H01L21/02052—Wet cleaning only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0073—Degasification of liquids by a method not covered by groups B01D19/0005 - B01D19/0042
- B01D19/0078—Degasification of liquids by a method not covered by groups B01D19/0005 - B01D19/0042 by vibration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/12—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electromagnetic waves
- B01J19/122—Incoherent waves
- B01J19/126—Microwaves
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/302—Treatment of water, waste water, or sewage by irradiation with microwaves
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J2219/12—Processes employing electromagnetic waves
- B01J2219/1203—Incoherent waves
- B01J2219/1206—Microwaves
- B01J2219/1209—Features relating to the reactor or vessel
- B01J2219/1221—Features relating to the reactor or vessel the reactor per se
- B01J2219/1224—Form of the reactor
- B01J2219/1227—Reactors comprising tubes with open ends
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/04—Non-contaminated water, e.g. for industrial water supply for obtaining ultra-pure water
Definitions
- the present invention relates to a method and an apparatus for producing pure water and a cleaning method, and more particularly to a method and an apparatus for producing pure water and a cleaning method suitably used, for example, in a cleaning step of an LSI production process.
- the conventional technology will be described by taking a cleaning process of the LSI process as an example.
- an oxide film is formed on a silicon wafer, windows are opened in a predetermined pattern in the oxide film, and then washed, p-type or n-type elements are introduced according to the purpose, and heat is applied.
- the step of diffusing or annealing the impurities into silicon in a diffusion furnace is repeated to form a device.
- the cleaning step is a very important step for manufacturing high-performance devices, and it is necessary to completely remove dirt on silicon.
- the silicon surface after removal of the oxide film is hydrophobic, and usually has poor wettability with pure water. It is difficult to completely remove impurities by washing. As a result, as described above, it is not possible to further improve the performance of the device, and this is a major obstacle to achieving higher performance of the device.
- the present invention improves the wettability of pure water on the surface of a substrate, especially the surface of a silicon wafer from which an oxide film has been removed, and brings pure water into contact with the silicon surface to completely remove impurities on silicon.
- An object of the present invention is to provide a method for producing pure water and a method for cleaning the equipment. Disclosure of the invention
- a first gist of the present invention resides in a method for producing pure water, which comprises applying a microphone mouth wave with water in contact with a catalyst.
- a second gist of the present invention is a catalyst holding means in which a catalyst is held so as to come into contact with water introduced inside, in the middle of a pipe for sending pure water to a use point, and ff self-catalyst holding means And a microwave generating means for applying a microwave to the water guided to the pure water.
- a third aspect of the present invention resides in a method for cleaning a substrate, comprising cleaning a substrate using pure water produced by the method described in the first aspect.
- the pure water of the present invention is, for example, pure water used in a washing step of a semiconductor manufacturing process.
- pure water from which impurities have been removed is used.
- other water may be used.
- FIG. 1 shows a configuration example of the pure water apparatus of the present invention, and an example of a manufacturing method will be described with reference to the drawings.
- the permeated water is sent to the first ion exchange tower 6-1 by the pump 5, where it is converted into pure water having a specific resistance of about 16 to 18 ⁇ ⁇ cm, and stored in the pure water tank 7.
- the pure water in the pure water tank 7 is sent to the second ion exchange tower 6-2 by the circulation pump 8, and becomes pure water having a specific resistance of 18 M ⁇ ⁇ cm or more.
- the pure water is further circulated through a route returning to the pure water tank 7 through the sterilizing means 9, the ultrafilter 10, and the use point 13.
- the sterilization means 9 in the circulation path is for preventing the generation of bacteria in pure water, and for example, an ozone injection device, an ultraviolet lamp, or the like is used. Of course, other means may be used. Further, the ultrafilter 10 is provided for removing minute suspended substances, dead bodies of patella killed by the sterilizing means 7, and the like.
- the catalyst holding means 11 and the microwave generating means 12 are provided between the above-described circulation path and the use point 13, and the microwave is applied while the catalyst is brought into contact with pure water. Further, a pump may be provided upstream of the catalyst holding means according to the flow rate to be used.
- a pump may be provided upstream of the catalyst holding means according to the flow rate to be used.
- any suitable means can be used as long as it can transmit microwaves and hold the catalyst.
- pure water inlet 15 and outlet 16 are used.
- Tef mouth with a larger inner diameter (trade name of polyfluorinated titanium fiber fabric manufactured by du Pont, same hereafter)
- a container 14 1 mm with micro holes of about 5 to 5 / m
- a Teflon sheet filter 18 having a thickness of about 18 mm is inserted, and a catalyst 17 is inserted between these Teflon sheet filters to form a catalyst layer.
- the catalyst for example, Pd, Pt and the like are used, and the particle size is preferably 1 to 10 m from the viewpoint of reactivity.
- the width of the catalyst layer is preferably small to suppress induction heating by microwaves, for example, about lmm. Microwaves are applied to the above Teflon sheet and catalyst layer. It is introduced parallel (ie, perpendicular to the flow direction of pure water).
- the microphone mouth wave generating means of the present invention an appropriate one can be used as long as it can generate a microphone mouth wave having a frequency of 1 to 10 GHz, but in order to efficiently cut off hydrogen bonding of water, a magnetron type is used. Are preferred. The output varies depending on the amount of pure water used, but about 1 KW is used.
- FIG. 1 is an ife diagram showing one configuration example of the pure water apparatus of the present invention.
- FIG. 2 is a schematic diagram showing an example of the catalyst holding means.
- Fig. 3 is a graph showing the variation in the mutual conductance characteristics of the MOS transistor.
- A shows the case where conventional pure water is used in the washing step, and
- B shows the pure state of the embodiment in the washing step. In this case, water was used.
- Pd powder having a diameter of 1 to 2 m and 50 m 1 of pure water were placed in a beaker, and irradiated with a magnetron microwave of 2.45 GHz at 100 W for 1 minute.
- a sample was prepared by adding the above Pd to pure water and a sample irradiated with only the microphone mouth wave.
- the silicon wafer whose oxide film was removed with hydrofluoric acid was immersed in these samples, and the wettability of pure water to silicon was examined.
- a Teflon catalyst holding means 11 having the five 1 mm-wide catalyst layers shown in FIG. 2 was provided.
- a Teflon sheet filter 18 having a hole diameter of 2 / ⁇ m was used, and Pd powder having a diameter of 5 to 6 was used as a catalyst.
- the holding means 11 was put in a resonator 19 of a magnetron type microwave generator 12, and a microwave of 2.45 GHz and 700 W was applied to the catalyst via a microwave waveguide 20.
- the flow rate of pure water was set to 2 LZ min by providing a pump upstream of the holding means 11.
- the channel length is 0.5 um and the channel width is 1.5 m, and three types of contact holes for source and drain are 11 um, 0.6 ⁇ .mx 0.6 / 111 and 0.3 / zmxO.3 / zm.
- Contactors bets opening was performed Ri by the reactive ion etching using CF 4 and H 2 gas. After that, the wafer was cleaned by RC A treatment, etched with dilute hydrofluoric acid, and the final cleaning was performed using the conventional pure water cleaning and the pure water of the present example. After that, A1 is deposited by bias sputtering, and after patterning, the characteristics of each transistor are evaluated, and the mutual inductance g is evaluated.In order to observe ⁇ W of residual impurities in the contact part with high sensitivity, metallization is performed. Later alloying annealing was not performed.
- Figure 3 shows the evaluation results. Evaluation ⁇ matter number. 10 to: L 00 or so transistors evening performed on the measured values of g m is shown by a value obtained by normalizing the average value g m * of each population. As tz m, 0 and 3 jw m decreases; the conventional samples A final wash was carried out with pure water, when the contactor bets hole L ⁇ mxlm, although variation of g m is small, contactors Tosaizu 0 6.. It can be seen that the variation increases when g m Z g— * is smaller than 1. This is because, as the contact hole becomes smaller, the conventional pure water has poor wettability and is not sufficiently washed, so that impurities remain at the bottom and the electrical contact between metal and silicon after metallization is reduced. It was bad.
- the cleaning of the silicon wafer becomes more complete, and a small amount of impurities that cannot be removed with conventional pure water are removed. As a result, a high-performance device can be manufactured.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Water Supply & Treatment (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Toxicology (AREA)
- Hydrology & Water Resources (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Health & Medical Sciences (AREA)
- Cleaning Or Drying Semiconductors (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Physical Water Treatments (AREA)
- Silicon Compounds (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP92914443A EP0641742A1 (en) | 1991-07-02 | 1992-07-02 | Method of producing pure water, system therefor and cleaning method |
US08/167,981 US5439596A (en) | 1991-07-02 | 1992-07-02 | Method of producing pure water, system therefor and cleaning method therefor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3/188145 | 1991-07-02 | ||
JP18814591A JP3237871B2 (ja) | 1991-07-02 | 1991-07-02 | 純水製造方法及び装置並びに洗浄方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993001134A1 true WO1993001134A1 (en) | 1993-01-21 |
Family
ID=16218538
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1992/000837 WO1993001134A1 (en) | 1991-07-02 | 1992-07-02 | Method of producing pure water, system therefor and cleaning method |
Country Status (4)
Country | Link |
---|---|
US (1) | US5439596A (ja) |
EP (1) | EP0641742A1 (ja) |
JP (1) | JP3237871B2 (ja) |
WO (1) | WO1993001134A1 (ja) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3055475B2 (ja) * | 1996-11-08 | 2000-06-26 | 日本電気株式会社 | マイクロ波励起の洗浄方法およびその装置 |
US6348157B1 (en) | 1997-06-13 | 2002-02-19 | Tadahiro Ohmi | Cleaning method |
JP4135780B2 (ja) * | 1997-08-29 | 2008-08-20 | ユーシーティー株式会社 | 薬液定量注入装置および方法 |
US6714300B1 (en) | 1998-09-28 | 2004-03-30 | Therma-Wave, Inc. | Optical inspection equipment for semiconductor wafers with precleaning |
US6689284B1 (en) | 1999-09-29 | 2004-02-10 | Kabushiki Kaisha Toshiba | Surface treating method |
US6524934B1 (en) | 1999-10-28 | 2003-02-25 | Lorimer D'arcy H. | Method of manufacture for generation of high purity water vapor |
US6861619B1 (en) | 2000-02-07 | 2005-03-01 | Therma-Wave, Inc. | Method and apparatus for preparing semiconductor wafers for measurement |
US6261853B1 (en) | 2000-02-07 | 2001-07-17 | Therma-Wave, Inc. | Method and apparatus for preparing semiconductor wafers for measurement |
ATE381876T1 (de) * | 2001-06-01 | 2008-01-15 | Comm And Power Ind Inc | Mikrowellenapplikator zur erwärmung einer strömenden flüssigkeit |
JP2006334494A (ja) * | 2005-06-01 | 2006-12-14 | Yoshinori Kanno | フィルター、空気洗浄装置、冷凍機器および水質浄化装置 |
JP2009022855A (ja) * | 2007-07-18 | 2009-02-05 | Tokyo Electric Power Co Inc:The | マイクロ波による処理装置 |
KR100966303B1 (ko) * | 2009-11-17 | 2010-06-28 | 김성우 | 압전 소자를 이용한 수도 계량기 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6146290A (ja) * | 1984-08-13 | 1986-03-06 | Toshiba Corp | 流体処理装置 |
JPS63270590A (ja) * | 1987-04-28 | 1988-11-08 | Matsushita Electric Ind Co Ltd | 浄水器 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4013552A (en) * | 1972-08-18 | 1977-03-22 | Ecquacon Corporation | Sewage treatment process |
US4219415A (en) * | 1978-08-09 | 1980-08-26 | Nassef N A | Method and apparatus for disposal of organic wastes |
US4345983A (en) * | 1981-05-21 | 1982-08-24 | Queen's University At Kingston | Method for disposal of chemical waste |
US4456512A (en) * | 1982-03-10 | 1984-06-26 | The Dow Chemical Company | Photochemical reactor and method |
US4582629A (en) * | 1982-03-29 | 1986-04-15 | Conoco Inc. | Use of microwave radiation in separating emulsions and dispersions of hydrocarbons and water |
US5068030A (en) * | 1990-11-09 | 1991-11-26 | Oxford Science Industrial Co., Ltd. | Water filtering sterilizing and heating apparatus |
US5215634A (en) * | 1990-12-10 | 1993-06-01 | Alberta Oil Sands Technology And Research Authority | Microwave induced catalytic conversion of methane and a hydrating agent to C3 oxygenates |
-
1991
- 1991-07-02 JP JP18814591A patent/JP3237871B2/ja not_active Expired - Fee Related
-
1992
- 1992-07-02 EP EP92914443A patent/EP0641742A1/en not_active Withdrawn
- 1992-07-02 WO PCT/JP1992/000837 patent/WO1993001134A1/ja not_active Application Discontinuation
- 1992-07-02 US US08/167,981 patent/US5439596A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6146290A (ja) * | 1984-08-13 | 1986-03-06 | Toshiba Corp | 流体処理装置 |
JPS63270590A (ja) * | 1987-04-28 | 1988-11-08 | Matsushita Electric Ind Co Ltd | 浄水器 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0641742A4 * |
Also Published As
Publication number | Publication date |
---|---|
JP3237871B2 (ja) | 2001-12-10 |
EP0641742A4 (en) | 1994-10-06 |
EP0641742A1 (en) | 1995-03-08 |
US5439596A (en) | 1995-08-08 |
JPH057869A (ja) | 1993-01-19 |
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