WO2009108275A2 - Ceramic coating comprising yttrium which is resistant to a reducing plasma - Google Patents

Ceramic coating comprising yttrium which is resistant to a reducing plasma Download PDF

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Publication number
WO2009108275A2
WO2009108275A2 PCT/US2009/000949 US2009000949W WO2009108275A2 WO 2009108275 A2 WO2009108275 A2 WO 2009108275A2 US 2009000949 W US2009000949 W US 2009000949W WO 2009108275 A2 WO2009108275 A2 WO 2009108275A2
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WO
WIPO (PCT)
Prior art keywords
plasma
yttrium
article
coating
spray
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/US2009/000949
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English (en)
French (fr)
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WO2009108275A3 (en
WO2009108275A9 (en
Inventor
Jennifer Y. Sun
Xiaoming He
Kenneth S. Collins
Thomas Graves
Senh Thach
Jie Yuan
Li Xu
Ren-Guan Duan
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Applied Materials Inc
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Applied Materials Inc
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Priority to JP2010547620A priority Critical patent/JP5674479B2/ja
Priority to CN200980106482.6A priority patent/CN102084020B/zh
Publication of WO2009108275A2 publication Critical patent/WO2009108275A2/en
Publication of WO2009108275A3 publication Critical patent/WO2009108275A3/en
Anticipated expiration legal-status Critical
Publication of WO2009108275A9 publication Critical patent/WO2009108275A9/en
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
    • C23C4/11—Oxides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249967—Inorganic matrix in void-containing component
    • Y10T428/24997—Of metal-containing material

Definitions

  • Embodiments of the present invention relate to a plasma or flame sprayed yttrium-comprising coating useful as a protective coating over processing surfaces in a semiconductor processing environment.
  • the plasma or flame sprayed yttrium- comprising coating is particularly useful in a reducing plasma to prevent particulate contamination of a substrate which is being processed.
  • Background [0007] This section describes background subject matter related to the disclosed embodiments of the present invention. There is no intention, either express or implied, that the background art discussed in this section legally constitutes prior art.
  • Corrosion (including erosion) resistance is a critical property for apparatus Attorney Docket No. AM-13,105 U.S. Express Mail No. EB 998981698 US
  • corrosive plasmas are present in the majority of semiconductor processing environments, including plasma enhanced chemical vapor deposition (PECVD) and physical vapor deposition (PVD), the most corrosive plasma environments are those used for cleaning of processing apparatus and those used to etch semiconductor substrates. This is especially true where high-energy plasma is present and combined with chemical reactivity to act upon the surface of components present in the environment.
  • the high-energy plasma is a reducing plasma, such as a hydrogen species-containing plasma
  • the formation of particulates in the processing chamber has been observed to be a problem. The particulates often contaminate the surfaces of devices contained in a substrate which is processed in the semiconductor processing chamber.
  • Process chamber liners and component apparatus present within the processing chambers used to fabricate electronic devices and micro-electro-mechanical systems (MEMS) are frequently constructed from aluminum and aluminum alloys. Surfaces of the process chamber and component apparatus (present within the chamber) are frequently anodized to provide a degree of protection from the corrosive environment. However, the integrity of the anodization layer may be deteriorated by impurities in the aluminum or aluminum alloy, so that corrosion begins to occur early, shortening the life span of the protective coating. The plasma resistance properties of aluminum oxide are not positive in comparison with some other ceramic materials.
  • Yttrium oxide is a ceramic material which has shown considerable promise in the protection of aluminum and aluminum alloy surfaces which are exposed to halogen- Attorney Docket No. AM-13,105 U.S. Express Mail No. EB 998981698 US
  • the substrate base material of the chamber wall or liner, of an apparatus component may be a ceramic material (Al 2 O 3 , SiO 2 , AlN, etc.), may be aluminum, or stainless steel, or may be another metal or metal alloy. Any of these may have a sprayed film over the base material.
  • the film may be made of a compound of a IH-B element of the periodic table, such as Y 2 O 3 .
  • the film may substantially comprise Al 2 O 3 and Y 2 O 3 .
  • a sprayed film of yttrium-aluminum-garnet (YAG) has also been mentioned. Examples of a sprayed film thickness range from 50 ⁇ m to 300 ⁇ m, for example.
  • YAG yttrium-aluminum-garnet
  • particulates and contaminants produced during the IC fabrication operations have reduced the yield of acceptable devices.
  • IC integrated circuit
  • yttrium-comprising ceramics included yttrium oxide (Y 2 O 3) , Y 2 O 3 -ZrO 2 solid solution, YAG, and YF 3 in addition to more exotic ceramic coating compositions designed to provide particular mechanical, physical or electrical properties.
  • plasma spray-coating apparatus prior to the present invention was about 25 ⁇ m or larger.
  • An unexpected improvement in corrosion/erosion resistance to reducing plasmas was obtained when the effective particle diameter fed to a plasma spray-coating apparatus was reduced to less than about 22 ⁇ m , and typically less than about 15 ⁇ m, with the effective particle diameter frequently ranging between about 15 ⁇ m and about 5 ⁇ m.
  • Smaller effective particle diameter powders, down to 0.1 ⁇ m, may be used in instances when the spray-coating system can be adapted to handle such particles.
  • Substrates spray- coated using the reduced particle size powders show a corresponding substantial and unexpected reduction in the average porosity of the yttrium-comprising spray coating.
  • the average porosity of the yttrium oxide coating produced using the previous spray coating technique which employed an effective powder diameter for the yttrium oxide of 25 ⁇ m or larger, ranges from above 1.5 % to about 4 %, measured using Image-Pro PlusTM Version 6.0 software in combination with an SEM microstructure image.
  • a yttrium oxide coating having an average porosity of about 0.47 % was achieved using a 15 ⁇ m effective powder diameter.
  • the average surface roughness of the yttrium oxide coating produced using the 25 ⁇ m effective diameter powder was about 200 ⁇ -inch Ra (5.0 ⁇ m Ra) compared with an average surface roughness of only 51.2 ⁇ -inch Ra (1.28 ⁇ m Ra) for the yttrium oxide coating produced using the 15 ⁇ m diameter powder yttrium oxide feed to the laser spray coating apparatus.
  • the average surface roughness may range from about 3 ⁇ m Ra to about 0.6 ⁇ m Ra.
  • the yttrium oxide coating produced using the 25 ⁇ m effective diameter yttrium oxide powder performed well for about 7.5 - 8 hours, while the yttrium oxide coating produced using the 15 ⁇ m (or smaller) diameter powder performed well for a time period in excess of 10 hours.
  • the break down voltage (V BD ) for the yttrium oxide coating produced using the 25 ⁇ m diameter powder was 750 V/mil, while the break down voltage for the yttrium oxide coating produced using the 15 ⁇ m diameter powder was at least 875 V/mil.
  • the sprayed coatings having a thickness of 300 ⁇ m or less exhibit porosities ranging from about 0.15 % to less than about 1.5 %, measured using the Image-Pro PlusTM software in the manner previously described.
  • Empirically generated data showed that a spray-coated yttrium oxide processing component produced using the improved spray coating technique employing the smaller effective diameter powders, according to embodiments of the present invention, was even more resistant to erosion in a reducing plasma and produced fewer particulates than a solid yttrium oxide component. This was presumed to be due to the fact that the solid yttrium oxide component required the use of a sintering additive, which Attorney Docket No. AM-13,105 U.S. Express Mail No. EB 998981698 US
  • YAG Yttrium Aluminum Garnet, which is commonly used in a Y 3 Al 5 O 12 form
  • a Y 2 O 3 -ZrO 2 solid solution or a YF 3 composition (or a combination thereof) to the plasma spray-coating apparatus to form a YAG, or Y 2 O 3 -ZrO 2 solid solution, or YF 3 (or a combination thereof) coating.
  • These materials reduce or avoid, respectively the formation of Y(OH) 3 .
  • Figure 1 is a cross-sectional schematic 100 of one type of plasma spraying system of the kind known in the art which may be used to apply coatings of the present invention.
  • Figures 2A, 2B, and 2C show comparative photomicrographs 200, 210, and 220 of the surface of a previously known as-coated plasma sprayed yttrium oxide coating at magnifications of 300X, 1000X, and 500OX, respectively.
  • Figures 2D, 2E, and 2F show photomicrographs 230, 240, and 250 of the surface of the as-coated plasma sprayed yttrium oxide coating illustrated in Figures 2 A through 2C after exposure to a reducing chemistry plasma.
  • Figure 2D is at a magnification of 300X
  • Figure 2E is at a magnification of 100OX
  • Figure 2F is at a magnification of 5000X.
  • Figures 3 A, 3B, and 3 C show photomicrographs 300, 310, and 320 of the surface of a lapped (polished) as-coated plasma sprayed yttrium oxide coating at Attorney Docket No. AM-13,105 U.S. Express Mail No. EB 998981698 US
  • magnifications of 300X, 100OX, and 5000X respectively.
  • Figures 3D, 3E, and 3F show photomicrographs 330, 340, and 350 of the surface of the lapped (polished) sprayed yttrium oxide coating illustrated in Figures 3 A through 3 C after exposure to a reducing chemistry plasma.
  • Figure 3D is at a magnification of 300X
  • Figure 3E is at a magnification of 100OX
  • Figure 3F is at a magnification of 5000X.
  • Figure 4A is a comparative example which shows a graph 400 of the range of the surface roughness in microns from a centerline 410 along the surface of an as-coated plasma sprayed yttrium oxide coating produced using the technology available prior to the present invention.
  • Figure 4B shows a graph 420 of the range of the surface roughness in microns from a centerline 430 along the surface of an as-coated plasma sprayed yttrium oxide coating produced using the technology of embodiments of the present invention.
  • Figures 5 A and 5B are comparative photomicrographs 510 and 520, which show a top view of the morphology of a plasma sprayed yttrium oxide coating prepared using plasma spray technology prior to the present invention, at magnifications of 200X and 1000X, respectively.
  • Figures 5C and 5D are photomicrographs 530 and 540, which show a top view of the morphology of plasma sprayed yttrium oxide coating prepared using the plasma spray technology of an embodiment of the present invention, at magnifications of 200X and 1000X, respectively.
  • Figure 6A is a photomicrograph 600 showing a cross-sectional side view of an aluminum alloy substrate 602 having a yttrium oxide coating 606 deposited over the surface 604 of the aluminum alloy substrate 602. This is a comparative photomicrograph which shows the characteristics of this structure which was prepared using plasma spray technology prior to the present invention, at a magnification of 200X.
  • Figure 6B is a photomicrograph 610 showing a cross-sectional side view of an aluminum alloy substrate 612 having a yttrium oxide coating 616 deposited over the surface 614 of the aluminum alloy substrate 612. This photomicrograph shows the characteristics of this structure which was prepared using plasma spray technology which is an embodiment of the present invention, at a magnification of 200X.
  • Figure 7A shows a block diagram 700 which compares an erosion rate for a plasma sprayed yttrium oxide coating (over an aluminum alloy substrate) applied using the prior art spray coating technology 704, with the erosion rate for a bulk substrate of yttrium oxide 706, with the erosion rate for a plasma sprayed yttrium oxide coating (over an aluminum substrate) applied using an embodiment of the present invention 708, where each of these test specimen substrates was exposed to the same plasma containing reducing species.
  • Figure 7B shows a block diagram 720 which compares an erosion rate for a series bulk, sintered materials. Each of these test specimen substrates was exposed to the same plasma containing reducing species.
  • Figure 8 shows a Table 800, listing the compositions of the various bulk materials for which the erosion rates are presented in Figure 7B.
  • Figure 9 shows a phase diagram 900 showing the majority of the materials which are listed in Table 800.
  • FIG. 1 shows a cross-sectional schematic 100 of a type of plasma spraying system which is useful in applying the coatings of the present invention.
  • the particular apparatus illustrated in Figure 1 is an APS 7000 Series Aeroplasma Spraying System available from Aeroplasma K.K. (Tokyo, Japan).
  • the apparatus 100 includes the following components: first DC main electrode 102; first auxiliary electrode 104; first argon source 106; first air source 108; spray material powder source 110; cathode torch 112; accelerator nozzle 114; plasma arc 116; second DC main electrode 118; second auxiliary electrode 120; anode torch 122; spray base material source 124; second argon source 126; second air source (plasma trimming) 128 (128A and 128B); spray film 130; plasma jet 132; molten powder source 134; third argon source 136; and twin anode ⁇ torch 138.
  • Twin anode ⁇ torch 138 consists of two anode torches, so that each of the anode torches bears half of the thermal load. Using twin anode torch ⁇ 138, a high voltage can be obtained with relatively low current, so that the thermal load on each of the torches will be low. Each nozzle and electrode rod of the torches is water-cooled separately, and the arc starting point and ending point are protected by inert gas, so that stable operation at 200 hours or more is ensured, the service life of consumed parts is extended, and maintenance costs are reduced. [0049] A stable high temperature arc is formed between the cathode torch 112 and the Attorney Docket No. AM-13,105 U.S. Express Mail No. EB 998981698 US
  • anode torch 122 and spray material can be fed directly into the arc.
  • the spray material is completely melted by the high temperature arc column.
  • the arc starting and ending points are protected by inert gas, so that air or oxygen can be used for the plasma gas introduced through the accelerator nozzle 1 14.
  • a plasma trimming function 128 is used for twin anode ⁇ . Plasma -trimming trims the heat of the plasma jet that does not contribute to melting of the spray material, and reduces the thermal load on the substrate material and film to make spraying at short distances possible.
  • While one kind of plasma spray coating apparatus is shown in Figure 1, one skilled in the art will recognize that other kinds of coating apparatus can be used to carry out the present invention as well.
  • Figures 2A, 2B, and 2C show comparative photomicrographs 200, 210, and 220 of the upper surface of an as-coated plasma sprayed yttrium oxide coating having a thickness of about 200 ⁇ m, which was deposited using the technology prior to the present invention.
  • the photomicrographs are at magnifications of 300X, 1000X 5 and 5000X, respectively.
  • the flaky surface texture, which would enable direct particulate formation is readily apparent at all of the magnifications, but particularly at the 5000X magnification.
  • Figures 2D, 2E, and 2F show photomicrographs 230, 240, and 250 of the surface of the as-coated plasma sprayed yttrium oxide coating illustrated in Figures 2A through 2C after exposure to a reducing chemistry plasma.
  • Figure 2D is at a magnification of 300X
  • Figure 2E is at a magnification of 100OX
  • Figure 2F is at a magnification of 5000X.
  • the reducing plasma recipe was and is as shown in Table One, for the data in Figures 2, 3, and Figure 7B, in a 300 mm eMaxTM CT+ chamber of the Attorney Docket No. AM-13, 105 U.S. Express Mail No. EB 998981698 US
  • test specimen substrate evaluated was located on the wafer and then put at the ESC location within the processing chamber. It is clear that a large amount of the flaky topography which was illustrated in Figures 2A, 2B, and 2C has been removed during exposure to the reducing plasma. It is likely that the material which was removed is accountable for particulates which appear on the surface of a device-containing semiconductor structure processed using the reducing chemistry plasma.
  • Figures 3 A, 3B, and 3C show photomicrographs 300, 310, and 320 of the surface of a lapped (polished) as-coated plasma sprayed yttrium oxide coating at magnifications of 300X, 100OX, and 5000X respectively. It is readily apparent that the flaky material has been removed from the upper surface of the coating.
  • Figures 3D, 3E, and 3F show photomicrographs 330, 340, and 350 of the surface of the lapped (polished) plasma sprayed yttrium oxide coating illustrated in Figures 3A through 3C after exposure to a reducing chemistry plasma.
  • Figure 3D is at a magnification of 300X
  • Figure 3E is at a magnification of 1000X
  • Figure 3F is at a magnification of 5000X.
  • the reducing plasma was produced in the manner described in Attorney Docket No. AM-13, 105 U.S. Express Mail No. EB 998981698 US
  • Another embodiment of the present invention pertains to improvement of the spray coating technique, to obtain a more dense spray coating which would be less susceptible to attack by reducing plasmas.
  • a substantial, unexpected reduction in porosity and surface roughness of the spray-coated yttrium oxide surface could be obtained by using a smaller particle size yttrium oxide powder feed to the plasma spray coating apparatus which was used to apply the coating to the aluminum alloy substrate.
  • the average, conventional effective particle diameter of yttrium oxide powder fed to the plasma spray-coating apparatus prior to the present invention was larger than 25 ⁇ m in diameter.
  • Empirical data was developed which showed that a reduction in this average powder diameter to about 22 ⁇ m or smaller, typically ranging between about 15 ⁇ m and about 0.1 ⁇ m, significantly reduced the porosity of the yttrium oxide coating produced on the aluminum alloy substrate surface.
  • Table Two shows the improvement in the physical properties of a plasma sprayed yttrium oxide coating, which properties were achieved using an embodiment of the present invention in which the size of the yttrium oxide powder feed Attorney Docket No. AM- 13 , 105 U.S. Express Mail No. EB 998981698 US
  • the average porosity of the yttrium oxide coating produced using the conventional 25 ⁇ m diameter yttrium oxide powder ranged from about 1.5 % to about 4%, while the average porosity of the yttrium oxide coating produced using a size-reduced equivalent diameter yttrium oxide powder size ranged from less than 1.5 % down to about 0.15 %.
  • a 15 ⁇ m equivalent diameter powder produced a coating having a porosity of about 0.47 %. This decrease in porosity is particularly significant as an indicator of the ease of attack of the plasma containing reducing species.
  • the average surface roughness Ra of the yttrium oxide coating produced using the conventional 25 ⁇ m diameter powder was about 200 ⁇ -inch Ra (5.0 ⁇ m Ra) compared with an average Attorney Docket No. AM-13,105 U.S. Express Mail No. EB 998981698 US
  • FIG. 4 A is a comparative example which shows a graph 400 of the range of the surface roughness in microns from a centerline 410 along the surface of an as-coated plasma sprayed yttrium oxide coating produced using the technology available prior to the present invention.
  • Figure 4B shows a graph 420 of the range of the surface roughness in microns from a centerline 430 along the surface of an as-coated plasma sprayed yttrium oxide coating.
  • the plasma-sprayed coating was produced using the embodiment of the invention in which a reduced effective diameter powder is fed to the plasma spraying apparatus.
  • FIGS. 5 A and 5B are comparative photomicrographs 510 and 520, which show a top view of the morphology of a plasma sprayed yttrium oxide coating prepared using plasma spray technology prior to the present invention, at magnifications of 200X and 100OX, respectively.
  • Figures 5C and 5D are photomicrographs 530 and 540, which show a top view of the morphology of plasma sprayed yttrium oxide coating prepared using the embodiment of the present invention in which a reduced effective diameter powder is fed to the plasma spraying apparatus.
  • Figures 5C and 5D are at magnifications of 200X and 100OX, respectively.
  • a comparison of Figures 5 A and 5B with Figures 5 C and 5D illustrates the reduction in surface area which is subject to attack by the plasma.
  • Figure 6A is a comparative photomicrograph 600 showing a cross-sectional side view of an aluminum alloy substrate 602 having a yttrium oxide coating 606 deposited over the surface 604 of the aluminum alloy substrate 602.
  • This comparative photomicrograph shows the characteristics of the structure which was prepared using plasma spray technology prior to the present invention, to produce a yttrium oxide coating having a thickness of about 200 ⁇ m.
  • the magnification in the photomicrograph is 200X.
  • the aluminum alloy substrate 602 of the test specimen is shown at the base of the photomicrograph 600.
  • the roughness of the surface 604 of the aluminum alloy is clearly defined.
  • the general porosity of the spray coated yttrium oxide 606 is also Attorney Docket No. AM- 13, 105 U.S. Express Mail No. EB 998981698 US
  • Figure 6B is a photomicrograph 610 which shows the improvement in the plasma spray-coated yttrium oxide coating achieved when the reduced effective diameter powder size yttrium oxide is fed to the plasma sprayer.
  • Figure 6B shows a cross- sectional side view of an aluminum alloy substrate 612 having a yttrium oxide coating 616 deposited over the surface 614 of the aluminum alloy substrate. Again, the magnification is 200X. The aluminum alloy substrate 612 of the test specimen is shown at the base of the photomicrograph 610.
  • FIG. 6A shows a block diagram 700 which compares an erosion rate for a for various yttrium oxide-comprising substrates.
  • Block 704 shows the erosion rate for a plasma sprayed yttrium oxide coating (over an aluminum alloy substrate) applied using the previous spray coating method, which employed yttrium oxide particle feed to the plasma sprayer which had an average effective particle diameter of 25 ⁇ m or larger.
  • Block 706 shows the erosion rate for a bulk specimen substrate (of the kind previously known in the art) of yttrium oxide 706.
  • Block 708 shows the erosion rate for a plasma sprayed yttrium oxide coating (over an aluminum substrate, where the yttrium oxide coating was applied using an embodiment Attorney Docket No. AM- 13, 105 U.S. Express Mail No. EB 998981698 US
  • NSTU Neutral Species Tuning Unit (ratio). **CSTU: Changed Species Tuning Unit (Ampere).
  • Figure 7B shows a block diagram 720 which compares an erosion rate for a series of bulk materials, each having a different chemical composition. Each of these test specimens was exposed to the same plasma containing reducing species per the recipe provided in Table One, in the 300 mm eMax CT+ processing chamber. The performance of YAG bulk material confirmed the theories about the avoidance of the formation of Y(OH) 3 in a reducing plasma as a method of improving erosion resistance.
  • Block 724 represents an HFOl substrate
  • Block 726 represents an NB04 substrate
  • Block 728 represents a Y-ZrO2 substrate
  • Block 730 represents an NBOl substrate
  • Block 732 represents an HPM substrate
  • Block 734 represents a YA3070 substrate
  • Block 736 represents a Y2O3 substrate
  • Block 738 represents a YZ20 substrate
  • Block 740 represents a YAG substrate.
  • Blocks 736, 738, and 740 are of the highest interest, because they represent bulk substrates for Y 2 O 3 , a Y 2 O 3 -ZrO 2 solid solution containing 20 atomic % ZrO 2 , and YAG, respectively.
  • Figure 8 shows a Table 800, which lists the chemical compositions of various starting powders of various bulk materials, the erosion rates of which are illustrated in Figure 7B.
  • Figure 9 shows a phase diagram 900 which illustrates the chemical compositions of starting powders and phases in the final materials formed, where the materials are listed in Table 800.
  • the discovery was made that the mechanism of attack of the yttrium oxide surface is through the formation of yttrium hydroxide, Y(OH) 3 .
  • thermodynamics data (Gibbs formation free energy) for various Attorney Docket No. AM- 13, 105 U.S. Express Mail No. EB 998981698 US
  • YAG, Y 2 O 3 -ZrO 2 solid solution, or YF 3 , or combinations thereof are excellent materials for use as a protective coating in a plasma environment which contains reducing active species.
  • V BD break down voltage
  • the average (equivalent diameter) particle size of the powder used to deposit a plasma sprayed YAG, Y 2 O 3 -ZrO 2 solid solution , or YF 3 coating ranges from about 22 ⁇ m to about 5 ⁇ m.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Drying Of Semiconductors (AREA)
  • Cleaning Or Drying Semiconductors (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
PCT/US2009/000949 2008-02-26 2009-02-13 Ceramic coating comprising yttrium which is resistant to a reducing plasma Ceased WO2009108275A2 (en)

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JP2010547620A JP5674479B2 (ja) 2008-02-26 2009-02-13 還元プラズマに耐性のイットリウム含有セラミックコーティング
CN200980106482.6A CN102084020B (zh) 2008-02-26 2009-02-13 可抵抗还原等离子体的含钇陶瓷涂层

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US12/072,530 2008-02-26
US12/072,530 US20090214825A1 (en) 2008-02-26 2008-02-26 Ceramic coating comprising yttrium which is resistant to a reducing plasma

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WO2009108275A3 WO2009108275A3 (en) 2009-11-05
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US11773479B2 (en) 2014-04-25 2023-10-03 Applied Materials, Inc. Plasma erosion resistant thin film coating for high temperature application
US12492464B2 (en) 2016-05-03 2025-12-09 Applied Materials, Inc. Protective metal oxy-fluoride coatings

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US20080213496A1 (en) * 2002-02-14 2008-09-04 Applied Materials, Inc. Method of coating semiconductor processing apparatus with protective yttrium-containing coatings
US10622194B2 (en) 2007-04-27 2020-04-14 Applied Materials, Inc. Bulk sintered solid solution ceramic which exhibits fracture toughness and halogen plasma resistance
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JP2009212293A (ja) * 2008-03-04 2009-09-17 Tokyo Electron Ltd 基板処理装置用の部品及び基板処理装置
US8206829B2 (en) * 2008-11-10 2012-06-26 Applied Materials, Inc. Plasma resistant coatings for plasma chamber components
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US20090214825A1 (en) 2009-08-27
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CN102084020A (zh) 2011-06-01
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