WO2004008510A1 - 基板の表面処理方法 - Google Patents
基板の表面処理方法 Download PDFInfo
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- WO2004008510A1 WO2004008510A1 PCT/JP2003/008722 JP0308722W WO2004008510A1 WO 2004008510 A1 WO2004008510 A1 WO 2004008510A1 JP 0308722 W JP0308722 W JP 0308722W WO 2004008510 A1 WO2004008510 A1 WO 2004008510A1
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- substrate
- process gas
- processing
- film
- component
- Prior art date
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- 239000000758 substrate Substances 0.000 title claims abstract description 134
- 238000000034 method Methods 0.000 title claims abstract description 93
- 230000003287 optical effect Effects 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 63
- 238000012545 processing Methods 0.000 claims description 28
- 238000006243 chemical reaction Methods 0.000 claims description 14
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 9
- 229910052753 mercury Inorganic materials 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 230000001678 irradiating effect Effects 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 150000004767 nitrides Chemical class 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims 4
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 1
- 150000002500 ions Chemical class 0.000 abstract description 17
- 238000005086 pumping Methods 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 24
- 150000003254 radicals Chemical class 0.000 description 20
- 238000004381 surface treatment Methods 0.000 description 14
- 239000010409 thin film Substances 0.000 description 14
- 230000005291 magnetic effect Effects 0.000 description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 230000001443 photoexcitation Effects 0.000 description 7
- 229910052786 argon Inorganic materials 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000010494 dissociation reaction Methods 0.000 description 6
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 230000005294 ferromagnetic effect Effects 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 230000005593 dissociations Effects 0.000 description 3
- 208000018459 dissociative disease Diseases 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000000427 thin-film deposition Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 229910019222 CoCrPt Inorganic materials 0.000 description 1
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- -1 argon ions Chemical class 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 229910052805 deuterium Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 150000005837 radical ions Chemical class 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000005469 synchrotron radiation Effects 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
- G11B5/8404—Processes or apparatus specially adapted for manufacturing record carriers manufacturing base layers
-
- 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
Definitions
- the present invention relates to a method for treating the surface of a conductive substrate using a photoexcitation process.
- the surface treatment includes depositing a thin film on a substrate, oxidizing, nitriding or carbonizing the substrate surface, flattening or etching the substrate surface.
- a method of directly decomposing a process gas in a gas phase to generate radicals, or a method of directly exciting a molecular atom chemically bonded to a substrate surface and releasing the same is already known.
- high light energy was required, and the use of vacuum ultraviolet rays of 20 eV or more and soft X-rays of 100 eV or more had to be used.
- a high-power excimer laser can be used for the former, and synchrotron radiation can be used for the latter, but both are extremely expensive light sources and point light sources. Difficulty irradiating a large area from above, and has not been put into practical use at present.
- the process gas touches the vacuum ultraviolet ray / soft X-ray light source, the light source is damaged. Therefore, it is desirable that the light source be protected by an optical window. Since there is no optical window material that can pass through, the pressure of the process gas can be reduced to less than 0.001 atm or a pressure difference can be set by using a complicated device such as a differential pumping mechanism. The light source needed to be protected. In the former case, the reaction efficiency is remarkable In the latter case, the reaction area was narrowed to within a few millimeters, which caused practical problems.
- a conductive substrate is placed in a processing container maintained at 0.001 to 1 atm, and a negative bias voltage is applied to the substrate while a container having a light output window is provided.
- the problem can be solved by irradiating ultraviolet rays having a light energy of 3 to 10 eV from a light source accommodated in the substrate and supplying a process gas into the processing container to treat the surface of the substrate.
- the conductive substrate is not limited to a metal, but also includes, for example, a wide band gap semiconductor such as aluminum nitride, which is not conductive at room temperature but shows conductivity at a high temperature, and further includes a ceramic material.
- ultraviolet light having a relatively small energy of 3 to 10 eV, particularly preferably 4 to 9 eV, is used. Ultraviolet light at this energy level can be generated by a general-purpose and inexpensive light source such as a low-pressure mercury lamp. This type of light source emits ultraviolet light at a wavelength of 18 5 11 111 or 2 5 4 11 m, but ultraviolet light at a wavelength of 1 85 nm is highly likely to generate ozone, so this light source is not used in normal applications.
- UV light of a wavelength of And those already used as an ultraviolet light source for removing a resist from a semiconductor can be applied.
- this light source can have any shape, not a point, but a line or a plane. If several light sources are juxtaposed, a large area can be easily irradiated.
- a deuterium lamp or a xenon (Xe) lamp can be used as a light source that generates ultraviolet light that meets the conditions of the present invention.
- the work function of a substance is 3 to 5 eV, and therefore, sufficient electron emission can be obtained at 3 eV or more, particularly 4 eV or more.
- 3 e V electrons exercise energy especially released at 4 e V or more ultraviolet radiation is very small and less than the number e V, by adjusting the negative bi ⁇ scan voltage applied to the substrate
- the significance of the upper limit of 10 eV is as follows. As described above, when the process gas touches the ultraviolet light source, the ultraviolet light source is damaged. Therefore, it is desirable to use a light source housed in a container having a light output window.
- the light output window absorbs light with a wavelength shorter than the energy band gap (up to 10 eV) (ie, light with a large eV), so in conventional processes using high energy UV, A light output window cannot be provided to prevent light absorption and the process gas will not reach the UV source. For example, special measures such as balancing the pressure between the processing section and the light source section have been devised.
- low-energy ultraviolet rays (light having energy that cannot decompose or ionize a process gas) are converted into ⁇ -energy electrons on the substrate surface to which a negative bias voltage is applied.
- the conversion enables extremely efficient surface processing, and the provision of a light output window enables surface treatment even if some light is absorbed.
- By providing the light output window there is no backflow of the process gas to the light source, so any kind of gas such as corrosive gas can be used without any problem, and the above-mentioned pressure balance with the light source part should be considered. Pressure can be set arbitrarily and the applicable range of the process can be expanded.
- the upper limit energy of ultraviolet light that can be used in the present invention is determined by the light absorption coefficient of the light output window, and is at most 10 eV when lithium fluoride is used (the wavelength of the transmission limit of lithium fluoride is 12 2). 0 nm). If a synthetic quartz glass for optics, which is cheaper than lithium fluoride, is used as the light output window, it will be about 7.8 eV. Thus, in the present invention, the energy range of the applied ultraviolet light is 3 to 10 eV, preferably 4 to 9 eV.
- the pressure in the processing container accommodating the substrate is set to 0.001 to 1 atm, preferably to 1 atm. Keep the pressure between 0.1 atm and 0.5 atm.
- the pressure in the processing chamber is kept relatively high, the number of electrons emitted from the substrate surface by irradiation with ultraviolet rays (photoelectrons by photoexcitation and secondary electrons by scattering in the solid) is several; Just traveling a small distance of um collides with molecules in the process gas, generating radicals and ions by electron impact dissociation. The distance traveled by an emitted electron before it collides with a gas molecule becomes shorter as the gas pressure increases.
- the pressure in the processing container is set to 0.01 atm, preferably to 0.01 atm or more.
- the pressure in the processing vessel is higher than the atmospheric pressure, the dissociation reaction due to electrons emitted from the substrate surface becomes difficult depending on the ultraviolet light having an energy of 3 to 10 eV. Therefore, the upper limit of the pressure in the processing container is set to 1 atm, preferably 0.5 atm.
- the relatively high pressure of the process gas not only has the advantage that the processing apparatus does not need to have a high vacuum specification, but also allows the heat generated by the ultraviolet lamp to be efficiently cooled by the process gas.
- the pressure of the process gas in the reaction vessel is 0.001 to 1 atm, but gas molecules used in many processes except for oxygen emit ultraviolet light of 3 to 10 eV. Since it hardly absorbs, the ultraviolet light can irradiate the substrate surface without being attenuated by absorption regardless of the gas pressure. Therefore, electron emission from the substrate surface does not depend at all on the process gas pressure, and highly efficient electron emission is possible even near atmospheric pressure.
- the preferable value of the process gas pressure is related to the control of the surface treatment process together with the negative bias voltage applied to the substrate. That is, when performing the surface treatment, the process current generally increases with the increase in the gas pressure, and the current value decreases again after exceeding the peak. On the other hand, when the negative bias voltage is increased, the current gradually increases, a breakdown occurs at a certain voltage, discharge occurs, and the current rapidly increases.
- the control stable region before the occurrence of the discharge is used.
- a suitable range of the bias voltage and the gas pressure is determined in advance by experiment according to the process target, and the stable region where the discharge does not occur, In addition, process control is performed by selecting a suitable range for obtaining the highest possible processing speed.
- radical generation for surface treatment has been conventionally performed by plasma generation using a microphone mouth wave, DC discharge, an electron gun, or the like. Since the energy for generating these radicals is supplied from the outside of the processing chamber, radicals having a higher density are generated far from the substrate surface. Therefore, the transfer of radicals to the substrate surface becomes a problem, and most of the generated radicals are not linked to surface processes such as thin film deposition.
- the reaction efficiency is low and economically high compared to the input power, causing unnecessary thin film deposition.
- electrons emitted from the substrate surface trigger the process, so that not only radical generation and plasma generation occur in the substrate surface region, but also depending on gas pressure
- radical generation with a higher density proceeds very close to the substrate surface and closer to the surface. Therefore, the input power for radical generation is not wasted, and a larger proportion of generated radicals can be involved in surface processes.
- radicals and ions generated in the immediate vicinity of the substrate surface can be efficiently transferred to the substrate surface, and the substrate surface can be treated.
- the positive ions generated here are subjected to acceleration toward the substrate surface due to the above-mentioned bias, and collide with the substrate surface, causing emission of electrons with high efficiency.
- ultraviolet rays are generated secondarily when the positive ions are relaxed, that is, when the positive ions recombine with electrons to form neutral radicals.
- ion irradiation with kinetic energy precisely controlled is included, and therefore, high reaction efficiency even at a low temperature, improvement in adhesion of a thin film, and densification can be achieved by ion assist.
- conventional plasma processes involve high-energy ions and neutral particles, and surface and thin film damage is a problem.
- nanoscale thin film deposition and atomic scale surface treatment are difficult to control.
- the method of the present invention has great advantages.
- various surface treatments can be performed by selecting a process gas.
- a process gas For example, if methane gas is used as a carbon source and a mixed gas of hydrogen and hydrogen is used as a process gas, a carbon film, particularly a diamond-like film, can be formed on the surface of the substrate. This film has utility as a protective coating on hard disks.
- a film derived from the component can be formed on the substrate.
- a gas containing oxygen, nitrogen or carbon is used as the above gas, an oxide film, a nitride film or a carbon film of the substrate material is formed.
- These films can be used for the formation of an aluminum thin film of a TMR magnetic head, the formation of a gate oxide film of MOSFET, and the passivation of a titanium metal surface.
- a gas containing a non-reactive component can also be used as a process gas in the present invention.
- the surface of the substrate can be planarized by using argon gas and utilizing the energy of collision with the substrate.
- it can be used for flattening the surface of a copper thin film electrode of a TMR magnetic head.
- the process device of the present invention has an ultraviolet light source housed in a container having an optical output window, a bias power source, and a counter mesh electrode, which are main components. It is not only simple, but also inexpensive, easy to maintain, and has excellent features that can be accommodated by improving existing equipment. In addition, by increasing the size of the ultraviolet light source or arranging the arrangement, the invention can be applied to a substrate having a large area or a substrate having irregularities.
- FIG. 1 is a conceptual diagram for explaining the principle of electron emission from the substrate surface in the present invention.
- FIG. 1 conceptually shows an apparatus for performing the method of the present invention.
- reference numeral 1 denotes a processing container, which can be depressurized to a predetermined pressure through an exhaust port 8 by an exhaust device (not shown). Further, a process gas can be supplied from the process gas inlet 7 through a piping system (not shown).
- Reference numeral 2 denotes a substrate, which is placed on the substrate holder 2a in an insulated state with respect to the container 1 and housed in the container.
- Opposite mesh electrode 3 is arranged opposite substrate 2, and electrode 3 is electrically insulated from container 1. This electrode 3 and the base
- a DC power supply 4 is connected between the substrate 2 and the substrate 2, and a negative bias voltage is applied to the substrate 2 with respect to the mesh electrode 3.
- An ultraviolet light source 5 for example, a low-pressure mercury lamp is arranged in the container 1, and irradiates the surface of the substrate 2 with ultraviolet light through the mesh electrode 3.
- the ultraviolet rays With the irradiation of the ultraviolet rays, first, electrons are emitted from the surface of the substrate 2 as shown by A. The electrons are accelerated by the electric field between the substrate 2 and the mesh electrode 3 and try to fly toward the electrode 3. Since the pressure in the processing vessel 1 is high, that is, the density of the gas molecules is large, the electrons collide with the gas molecules after traveling for a very short distance to generate radicals and ions 6. Since the radical ions are generated very close to the surface of the substrate 2, they can be efficiently transferred to the surface of the substrate 2 and the surface treatment of the substrate can be performed.
- the generated positive ions are accelerated toward the substrate surface by the above-mentioned bias voltage, and collide with the substrate surface, thereby emitting electrons with high efficiency as shown by B. Further, in the process of relaxing the positive ions, ultraviolet rays are generated secondarily, which causes new electron emission as shown by C.
- the electron emission multiplies up to a certain saturation limit as if positive feedback was applied, so that even if the power of the UV light source to be triggered is low, a sufficient number of electron emissions for the surface process can be obtained. It is possible to pursue.
- a diamond-like protective film was formed on the substrate of the hard disk.
- the hard disk has, for example, an underlayer of Cr, a ferromagnetic metal layer of CoCrPt alloy formed on an A1 substrate, and a protective film formed on the ferromagnetic metal layer.
- a bias voltage of minus 150 V was applied to the substrate.
- a mixed gas of hydrogen and methane gas (mixing ratio of methane gas at a flow rate of 1%) was used as the process gas, and the pressure inside the vessel was kept at 0.3 atm while evacuating.
- the substrate surface was irradiated with ultraviolet light using a low-pressure mercury lamp, a diamond-like film was formed on the surface of the ferromagnetic metal layer.
- the growth rate of the film was 0.3 nm to 0.5 nmZ second, and a sufficient thickness (3 nm) as a protective film for the hard disk was obtained in about 10 seconds.
- This film had a diamond-like crystal structure and exhibited sufficient hardness to be used as a protective coating.
- An alumina thin film was formed on a TMR magnetic head.
- a lower electrode layer (Cu), a magnetic layer, an insulating layer having a tunnel effect, a magnetic layer, an upper electrode layer (Cu), etc. are sequentially formed on a Si substrate.
- an insulating layer an alumina thin film is used.
- the substrate on which the A1 thin film is formed on the lower electrode layer (Cu) and the magnetic layer is accommodated in a processing container, and a bias voltage of minus 50 V is applied to the substrate, and argon is used as a process gas. Oxygen diluted with helium (flow rate 5%) was supplied.
- the surface of the substrate was irradiated with ultraviolet rays using a low-pressure mercury lamp while maintaining the pressure inside the container at 0.01 atm, the aluminum on the substrate was oxidized and an alumina thin film (1.5 nm thick) was formed. .
- This thin film is sufficiently dense and has high flatness, which greatly contributes to the improvement of the detection sensitivity characteristics of the TMR magnetic head.
- the present invention since it is necessary that a bias voltage can be applied to the surface of the target substrate, when the temperature of the substrate is room temperature, it is generally limited to metals having good electric conductivity.
- the present invention can be applied to an insulating film such as alumina.
- Alumina band gap It is as large as about 9 eV, and it is difficult to excite electrons from the valence band to the conduction band with the ultraviolet rays currently considered, and even if it can be excited, it may be positively charged by electron emission.
- the Fermi level of the magnetic layer is located almost in the middle of the band gap of alumina, from the viewpoint of the valence electrons of the substrate having electrical conductivity, the conduction band of alumina is not affected by ultraviolet irradiation of 4-5 eV. Electrons can be emitted through the bottom, so there is no problem in principle. However, it is difficult to deposit a metal film on a sufficiently thick alumina substrate at room temperature, but it is possible to increase the temperature.
- a single crystal silicon wafer is used as a substrate in a processing container to form a gut insulating film for a MOSFET (field-effect transistor having a metal oxide semiconductor structure), and a bias voltage of minus 100 V is applied to the substrate.
- Oxygen (flow rate ratio: 1%) diluted with argon or the like was supplied as a process gas while applying pressure.
- the substrate surface was irradiated with ultraviolet rays using a low-pressure mercury lamp while maintaining the pressure in the processing vessel at 0.05 atm, a 2 nm silicon oxide film was formed in 2 seconds.
- this silicon oxide film is dense, it does not contain impurities at the same time, and greatly contributes to the improvement of the characteristics of MOSFET. (Example 4) Flattening of substrate surface
- the method of the present invention was applied to planarize a copper thin film electrode of a TMR magnetic head.
- a copper thin-film electrode of the TMR magnetic head is used as a substrate, housed in a processing vessel, and a bias voltage of minus 200 V is applied to the substrate to shake the copper atoms on the substrate surface and promote surface diffusion.
- argon as a process gas.
- the surface of the substrate was irradiated with ultraviolet rays using a low-pressure mercury lamp while maintaining the pressure in the container at 0.02 atm. As a result, the substrate surface was flattened due to the collision of argon ions.
- a light source housed in a container having a light output window capable of irradiating ultraviolet light having an energy of 3 to 10 eV is used.
- Such energy-level UV radiation can be obtained, for example, with a low-pressure mercury lamp.
- This lamp is a general-purpose lamp commonly used for removing the resist of semiconductors, etc., and is easily available and inexpensive.
- this lamp is a linear or planar light source, it is suitable for illuminating large-area substrates. By increasing the size of such an ultraviolet lamp or devising an arrangement method, the present invention can be applied to a large-area substrate or a substrate having irregularities.
- the gas pressure at which plasma is generated has upper and lower limits. Therefore, when controlling processes at the nanoscale, raw material gases have been diluted with an inert gas such as argon.
- an inert gas such as argon.
- the dilution can be performed at an arbitrary ratio.
- the plasma generation in the conventional method occurs over a much wider area than the substrate area because the density distribution is not uniform, and thus wasteful.
- the plasma generation can be performed arbitrarily according to the substrate size. It is possible to generate radicals.
- the pressure in the reaction vessel is selected to be as high as 0.01 atm to 1 atm, preferably from 0.01 atm to 0.5 atm.
- ions and radicals are generated in the vicinity of the substrate surface due to collisions between the components of the process gas and the electrons, and these ions are produced with high efficiency.
- the surface of the substrate can be treated.
- the kinetic energy is extremely low and does not cause the electron impact dissociation reaction. There is no accumulation of foreign substances or formation of substances due to reactions. This has the effect of not only facilitating the maintenance of the processing equipment, but also preventing the occurrence of defects and contamination of the thin film due to particles peeled off from unnecessary deposits.
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Chemical Vapour Deposition (AREA)
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10392913T DE10392913T5 (de) | 2002-07-10 | 2003-07-09 | Verfahren zur Behandlung der Oberfläche eines Substrats |
GB0500273A GB2406713B (en) | 2002-07-10 | 2003-07-09 | Surface treating method for substrate |
AU2003248256A AU2003248256A1 (en) | 2002-07-10 | 2003-07-09 | Surface treating method for substrate |
US10/520,633 US7871677B2 (en) | 2002-07-10 | 2003-07-09 | Surface treating method for substrate |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-201148 | 2002-07-10 | ||
JP2002201148A JP3932181B2 (ja) | 2002-07-10 | 2002-07-10 | 基板の表面処理方法および装置 |
Publications (1)
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PCT/JP2003/008722 WO2004008510A1 (ja) | 2002-07-10 | 2003-07-09 | 基板の表面処理方法 |
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US (1) | US7871677B2 (ja) |
JP (1) | JP3932181B2 (ja) |
KR (1) | KR100979192B1 (ja) |
CN (1) | CN100355029C (ja) |
AU (1) | AU2003248256A1 (ja) |
DE (1) | DE10392913T5 (ja) |
GB (1) | GB2406713B (ja) |
WO (1) | WO2004008510A1 (ja) |
Families Citing this family (12)
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JP4828162B2 (ja) * | 2005-05-31 | 2011-11-30 | 株式会社日立ハイテクノロジーズ | 電子顕微鏡応用装置および試料検査方法 |
JP4876708B2 (ja) * | 2006-05-11 | 2012-02-15 | Tdk株式会社 | トンネル磁気抵抗効果素子の製造方法、薄膜磁気ヘッドの製造方法及び磁気メモリの製造方法 |
US7527695B2 (en) * | 2006-06-21 | 2009-05-05 | Asahi Glass Company, Limited | Apparatus and method for cleaning substrate |
US8455060B2 (en) * | 2009-02-19 | 2013-06-04 | Tel Epion Inc. | Method for depositing hydrogenated diamond-like carbon films using a gas cluster ion beam |
KR102194821B1 (ko) * | 2013-10-17 | 2020-12-24 | 삼성디스플레이 주식회사 | 유기물 증착 장치 및 유기물 증착 방법 |
US9953665B1 (en) * | 2013-12-11 | 2018-04-24 | Kansai University | Systems and methods for applying electric fields during ultraviolet exposure of lubricant layers for hard disk media |
JP6954524B2 (ja) | 2017-03-10 | 2021-10-27 | 昭和電工株式会社 | 薄膜製造方法、磁気ディスクの製造方法およびナノインプリント用モールドの製造方法 |
CN115793401A (zh) * | 2017-03-15 | 2023-03-14 | Asml荷兰有限公司 | 用于输送气体的设备及用于产生高谐波辐射的照射源 |
KR102021017B1 (ko) * | 2017-11-27 | 2019-09-18 | 한국에너지기술연구원 | 진공 플라즈마 반응 장치 및 이의 조립 방법 |
KR102116867B1 (ko) * | 2018-05-08 | 2020-05-29 | 주식회사 원익큐엔씨 | 임플란트 표면개질 처리장치 |
JP6913060B2 (ja) * | 2018-07-24 | 2021-08-04 | 株式会社日立ハイテク | プラズマ処理装置及びプラズマ処理方法 |
JP7292671B2 (ja) * | 2019-06-17 | 2023-06-19 | 株式会社レゾナック | 磁気記録媒体の製造方法 |
Citations (4)
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JPS61189631A (ja) * | 1985-02-18 | 1986-08-23 | Sanyo Electric Co Ltd | アモルフアス半導体膜の製造方法 |
JPH08115891A (ja) * | 1994-10-13 | 1996-05-07 | Satoshi Matsumoto | 半導体の処理方法 |
JPH0967674A (ja) * | 1995-08-28 | 1997-03-11 | Sony Corp | 薄膜形成方法及び装置 |
JP2002075876A (ja) * | 2000-08-30 | 2002-03-15 | Miyazaki Oki Electric Co Ltd | 真空紫外光を用いたcvd半導体製造装置 |
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JPS59215732A (ja) * | 1983-05-24 | 1984-12-05 | Semiconductor Energy Lab Co Ltd | 窒化珪素被膜作製方法 |
US4595601A (en) * | 1984-05-25 | 1986-06-17 | Kabushiki Kaisha Toshiba | Method of selectively forming an insulation layer |
US5183511A (en) | 1986-07-23 | 1993-02-02 | Semiconductor Energy Laboratory Co., Ltd. | Photo CVD apparatus with a glow discharge system |
JPH02182883A (ja) * | 1989-01-10 | 1990-07-17 | Nec Corp | 紫外線励起化学気相成長装置 |
JP3023854B2 (ja) * | 1990-10-09 | 2000-03-21 | 富士通株式会社 | シリコン半導体基板の平坦化方法 |
-
2002
- 2002-07-10 JP JP2002201148A patent/JP3932181B2/ja not_active Expired - Lifetime
-
2003
- 2003-07-09 KR KR1020057000449A patent/KR100979192B1/ko not_active IP Right Cessation
- 2003-07-09 WO PCT/JP2003/008722 patent/WO2004008510A1/ja active Application Filing
- 2003-07-09 US US10/520,633 patent/US7871677B2/en not_active Expired - Fee Related
- 2003-07-09 GB GB0500273A patent/GB2406713B/en not_active Expired - Fee Related
- 2003-07-09 AU AU2003248256A patent/AU2003248256A1/en not_active Abandoned
- 2003-07-09 DE DE10392913T patent/DE10392913T5/de not_active Ceased
- 2003-07-09 CN CNB038162911A patent/CN100355029C/zh not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS61189631A (ja) * | 1985-02-18 | 1986-08-23 | Sanyo Electric Co Ltd | アモルフアス半導体膜の製造方法 |
JPH08115891A (ja) * | 1994-10-13 | 1996-05-07 | Satoshi Matsumoto | 半導体の処理方法 |
JPH0967674A (ja) * | 1995-08-28 | 1997-03-11 | Sony Corp | 薄膜形成方法及び装置 |
JP2002075876A (ja) * | 2000-08-30 | 2002-03-15 | Miyazaki Oki Electric Co Ltd | 真空紫外光を用いたcvd半導体製造装置 |
Also Published As
Publication number | Publication date |
---|---|
CN1669126A (zh) | 2005-09-14 |
GB2406713B (en) | 2006-04-26 |
GB0500273D0 (en) | 2005-02-16 |
KR100979192B1 (ko) | 2010-08-31 |
GB2406713A (en) | 2005-04-06 |
US20050271831A1 (en) | 2005-12-08 |
KR20060014019A (ko) | 2006-02-14 |
JP2004047610A (ja) | 2004-02-12 |
DE10392913T5 (de) | 2005-08-18 |
AU2003248256A1 (en) | 2004-02-02 |
JP3932181B2 (ja) | 2007-06-20 |
CN100355029C (zh) | 2007-12-12 |
US7871677B2 (en) | 2011-01-18 |
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