WO2023128606A1 - Vcsel 소자의 개별 출력 제어가 가능한 기판 열처리 장치 - Google Patents
Vcsel 소자의 개별 출력 제어가 가능한 기판 열처리 장치 Download PDFInfo
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- WO2023128606A1 WO2023128606A1 PCT/KR2022/021502 KR2022021502W WO2023128606A1 WO 2023128606 A1 WO2023128606 A1 WO 2023128606A1 KR 2022021502 W KR2022021502 W KR 2022021502W WO 2023128606 A1 WO2023128606 A1 WO 2023128606A1
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- substrate
- vcsel
- heat treatment
- treatment apparatus
- beam irradiation
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- 238000000034 method Methods 0.000 claims abstract description 50
- 238000010438 heat treatment Methods 0.000 claims description 63
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
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- 239000007769 metal material Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910003902 SiCl 4 Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000005234 chemical deposition Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- SLLGVCUQYRMELA-UHFFFAOYSA-N chlorosilicon Chemical compound Cl[Si] SLLGVCUQYRMELA-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/687—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
- H01L21/68714—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
- H01L21/68764—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support characterised by a movable susceptor, stage or support, others than those only rotating on their own vertical axis, e.g. susceptors on a rotating caroussel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any of groups F27B1/00 - F27B15/00
- F27B17/0016—Chamber type furnaces
- F27B17/0025—Chamber type furnaces specially adapted for treating semiconductor wafers
-
- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
-
- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67098—Apparatus for thermal treatment
- H01L21/67115—Apparatus for thermal treatment mainly by radiation
-
- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/687—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
-
- 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/687—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
- H01L21/68714—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
- H01L21/68785—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support characterised by the mechanical construction of the susceptor, stage or support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/18—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities
- H01S5/183—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
Definitions
- the present invention relates to a substrate heat treatment apparatus for heat treating a flat substrate using a laser beam irradiated from a VCSEL element.
- a semiconductor wafer or a flat substrate such as a glass substrate for a flat panel display device may be manufactured into a semiconductor or flat panel display module by undergoing a heat treatment process such as an epitaxial process, a thin film crystallization process, an ion implantation process, or an activation process.
- the epitaxial process is a process of growing a thin film required on the surface of a semiconductor wafer.
- the epitaxial process is performed by injecting a process gas into a process chamber maintained at a high temperature of 600° C. or higher in a vacuum state. It is necessary to uniformly maintain the temperature of the semiconductor wafer as a whole during the process, and it is necessary to reduce the influence of the emissivity of the outer housing constituting the process chamber. Particularly, among components of the outer housing, the emissivity of components or walls facing the upper surface of the semiconductor wafer affects the process temperature of the semiconductor wafer, so it is necessary to maintain a constant emissivity.
- the heat treatment process is a method of heat treatment by uniformly irradiating a laser beam to a semiconductor wafer using a beam irradiation module in which a plurality of VCSEL elements are disposed to cover a large area and irradiates a laser beam.
- the VCSEL device may emit a laser beam from a micro-emitter.
- the beam irradiation module uses the divergence of laser beams emitted from VCSEL elements, and can uniformly heat a semiconductor wafer through overlapping of laser beams emitted from adjacent VCSEL elements.
- the beam irradiation module is composed of a plurality of VCSEL elements, and the plurality of VCSEL elements may be disposed in an area covering an entire semiconductor wafer.
- the heat treatment process requires a small temperature deviation and high temperature uniformity according to miniaturization of semiconductor technology.
- the currently used heat treatment apparatus has a problem in that it is difficult to realize the required temperature uniformity due to various limitations.
- An object of the present invention is to provide a substrate heat treatment apparatus capable of individually controlling the output of a VCSEL element capable of reducing temperature deviation of a flat substrate and increasing temperature uniformity in a heat treatment process of a flat substrate.
- An object of the present invention is to provide a substrate heat treatment apparatus capable of individually controlling a supply current supplied to a VCSEL element so that the output of the VCSEL element is uniform.
- the substrate heat treatment apparatus capable of controlling the individual output of the VCSEL element of the present invention includes a process chamber and a plurality of VCSEL elements in which a flat substrate to be heat treated is located, and a beam irradiation module for irradiating a laser beam to the flat substrate, ,
- the beam irradiation module is characterized in that the supply current is controlled so that the outputs of the VCSEL elements are the same.
- different supply currents may be supplied to each of the VCSEL devices.
- the beam irradiation module is characterized in that different supply currents are supplied to the VCSEL elements.
- the correlation between supply current and output may be set in advance for each of the VCSEL elements.
- the correlation of the VCSEL elements may be set by an equation or a lookup table.
- the VCSEL element may be supplied with a supply current for required output according to the correlation.
- the substrate heat treatment apparatus capable of individually controlling the output of the VCSEL elements of the present invention individually controls the supply power supplied to the plurality of VCSEL elements, the output of the VCSEL elements can be uniform throughout.
- the substrate heat treatment apparatus capable of controlling the individual output of the VCSEL element of the present invention supplies the supply current individually differently according to the pre-evaluated supply current and output relationship for each VCSEL element, so the output is uniformly controlled as a whole, , it is possible to reduce the temperature deviation of the flat substrate.
- FIG. 1 is a block diagram of a substrate heat treatment apparatus according to an embodiment of the present invention.
- FIG. 2 is a plan view of the beam irradiation module of FIG. 1 .
- FIG. 3 is a partial perspective view of the beam irradiation module of FIG. 2 .
- FIG. 4 is a vertical cross-sectional view of the VCSEL element of FIG. 3 along line “A-A”.
- FIG. 5 is a plan view showing a position for measuring the temperature of a semiconductor wafer in the substrate heat treatment apparatus of FIG. 1 .
- FIG. 6 is a table of measurement data of supply current and measured light output for each time interval of VCSEL elements constituting the beam irradiation module of FIG. 5 .
- FIG. 10 is a graph of a result of measuring a temperature distribution in the semiconductor wafer of FIG. 5 .
- FIG. 11 is a graph of a result of measuring a temperature distribution of a semiconductor wafer in a conventional substrate heat treatment apparatus.
- FIG. 1 is a block diagram of a substrate heat treatment apparatus according to an embodiment of the present invention.
- FIG. 2 is a plan view of the beam irradiation module of FIG. 1 .
- FIG. 3 is a partial perspective view of the beam irradiation module of FIG. 2 .
- FIG. 4 is a vertical cross-sectional view of the VCSEL element of FIG. 3 along line “A-A”.
- the substrate heat treatment apparatus 10 capable of individually controlling the output of a VCSEL device according to an embodiment of the present invention includes a process chamber 100, a beam irradiation module 200, and a gas injection module ( 300) and a substrate rotation module 400.
- the substrate heat treatment apparatus 10 may perform a manufacturing process such as an epitaxial process, a crystallization process, an ion implantation process, or an activation process for the flat substrate (a).
- the flat substrate (a) may be a semiconductor wafer or a glass substrate.
- the flat substrate (a) may be a flexible substrate such as a resin film.
- the flat substrate (a) may include various elements or conductive patterns formed on or inside the flat substrate.
- the substrate heat treatment apparatus 10 may use a VCSEL element as a heat source in a beam irradiation module for heating the flat substrate (a).
- the VCSEL element may irradiate a laser beam of a single wavelength.
- the VCSEL element may preferably be an element that irradiates a laser beam of a single wavelength of approximately 940 nm.
- the substrate heat treatment apparatus 10 may heat the flat substrate a by irradiating the laser beam generated by the beam irradiation module 200 to the flat substrate a.
- the substrate heat treatment apparatus 10 supplies current to each VCSEL element constituting the beam irradiation module 200 according to a pre-evaluated supply current and output relationship, the output of the VCSEL element can be uniform. Accordingly, the substrate heat treatment apparatus can uniformly heat the flat substrate as a whole.
- the process chamber 100 may include an outer housing 110, an inner housing 120, a beam irradiation plate 130, a substrate support 140, and an infrared transmission plate 150.
- the process chamber 100 may provide a space in which the flat substrate (a) is accommodated and heat treated.
- the flat substrate (a) may be supported by the substrate support 140 inside the process chamber 100 .
- the process chamber 100 allows the laser beam generated by the beam irradiation module 200 located outside to be irradiated to the lower surface of the flat substrate located inside.
- the process chamber 100 passes through the beam irradiation plate 130 so that the laser beam is irradiated to the lower surface of the flat substrate (a) seated on the substrate support 140 .
- the outer housing 110 is formed in a cylindrical shape with a hollow inside, and may include a side wall 111, an upper plate 112, and a lower plate 113.
- the outer housing 110 may be formed in a substantially cylindrical shape, a square cylinder shape, a pentagonal cylinder shape, or a hexagonal cylinder shape.
- the outer housing 110 may be formed in a shape having a larger horizontal cross-sectional area than the area of the flat substrate (a) subjected to internal heat treatment.
- the side wall 111 may be formed in a hollow cylindrical shape, a square cylinder shape, a pentagonal cylinder shape, or a hexagonal cylinder shape.
- the side wall 111 provides an upper space 100a of the chamber where heat treatment is performed therein.
- the side wall 111 provides a space in which parts of the beam irradiation module 200 and the substrate rotation module 400 are accommodated.
- the top plate 112 may be formed in a plate shape corresponding to the top planar shape of the side wall 111 .
- the upper plate 112 is coupled to the upper end of the side wall 111 and may seal the upper part of the side wall 111 .
- the lower plate 113 corresponds to the lower planar shape of the side wall 111 and has a lower through hole 113 formed therein.
- the lower plate 113 may be formed as a circular ring or a square ring having a predetermined width.
- the lower plate 113 may be formed in various shapes according to the shape of the lower plane of the chamber lower space 100b.
- the lower plate 113 is coupled to the lower portion of the side wall 111 and shields the outer side of the lower side wall 111 .
- a lower portion of the inner housing 120 described below may be coupled to the outside of the through hole of the lower plate 113 .
- the inner housing 120 is formed in a cylindrical shape with a hollow inside, and may be formed in a cylindrical shape, a square cylinder shape, a pentagonal cylinder shape, or a hexagonal cylinder shape.
- the inner housing 120 may have an outer diameter or outer width smaller than the inner diameter or inner width of the outer housing 110 .
- the inner housing 120 may be formed at a lower height than the outer housing 110 .
- the inner housing 120 may be formed with an upper side positioned at a lower portion of the flat substrate (a) seated inside the process chamber 100 .
- the inner housing 120 may be formed with a larger diameter or width than the diameter or width of the flat substrate (a) positioned thereon.
- the inner housing 120 may be formed to have a larger horizontal area than the flat substrate (a). Accordingly, an upper chamber 100a in which the flat substrate a is seated is formed on the upper portion of the inner housing 120 . That is, the chamber upper space 100a is formed on the upper part of the inner housing 120 inside the outer housing 110 and provides a space in which the flat substrate a is seated.
- the flat substrate (a) may be positioned in the chamber upper space 100a such that the lower surface of the region to be heat treated is exposed when viewed from the lower portion of the inner housing 120 .
- the lower side of the inner housing 120 may be coupled to be positioned at substantially the same level as the lower side of the outer housing 110 .
- the lower end of the inner housing 120 may be coupled to the inner side of the lower plate 113 .
- the space between the outer side of the inner housing 120 and the inner side of the outer housing 110 may be sealed by the lower plate 113 .
- a chamber lower space 100b may be formed between an outer surface of the inner housing 120 and an inner surface of the outer housing 110 .
- the upper chamber space 100a and the lower chamber space 100b are shielded from the outside by the outer housing 110, the inner housing 120, and the lower plate 113, and may be maintained in a vacuum or process gas atmosphere.
- the beam irradiation plate 130 is coupled to an upper portion of the inner housing 120 and may be positioned below the flat substrate (a).
- the beam irradiation plate 130 may be formed of a transparent plate through which a laser beam passes, such as quartz or glass.
- the beam irradiation plate 130 transmits the laser beam and irradiates the lower surface of the flat substrate (a). More specifically, the beam irradiation plate 130 allows the laser beam incident from the inside of the inner housing 120 through the lower surface to be irradiated to the lower surface of the flat substrate (a).
- the beam irradiation plate 130 may have an area larger than that of the flat substrate (a).
- the beam irradiation plate 130 may have a larger diameter or width than the diameter or width of the flat substrate (a).
- the beam irradiation plate 130 may preferably have a diameter or width 1.1 times greater than the diameter or width of the flat substrate (a). In this case, the beam irradiation plate 130 may irradiate the entire lower surface of the flat substrate (a) with the laser beam.
- the substrate support 140 may include an upper support 141 and a connection support 142 .
- the substrate support 140 may be positioned above the inner housing 120 to support the lower outer side of the flat substrate (a) so that the lower surface of the flat substrate (a) is exposed.
- the substrate support 140 may extend into the lower space 100b of the chamber and be coupled with the substrate rotation module 400 .
- the substrate support 140 may rotate the flat substrate (a) by the operation of the substrate rotation module 400 .
- the upper support 141 may have a substrate exposure hole 141a inside and may be formed in a ring shape having a predetermined width.
- the upper support 141 may support the lower outer side of the flat substrate (a) while exposing the lower surface of the flat substrate (a).
- the upper support 141 may have a larger diameter or width than the diameter or width of the flat substrate (a).
- the substrate exposure hole 141a may be formed at the center of the upper support 141 through upper and lower surfaces.
- the substrate exposure hole 141a may be formed with a predetermined area to entirely expose a region requiring heat treatment on the lower surface of the flat substrate (a).
- connection support 142 is formed in a cylindrical shape with upper and lower portions open, and may be formed in a shape corresponding to the shape of the inner housing 120 .
- the lower support may be formed in a cylindrical shape corresponding to this.
- the connection support 142 may be located across the upper chamber space 100a and the lower chamber space 100b.
- the connection support 142 may have an upper portion coupled to the outer side of the upper support 141 and a lower portion extending into the chamber lower space 100b to be coupled with the substrate rotation module 400 . Accordingly, the connection support 142 can rotate the upper support 141 and the flat substrate (a) while being rotated by the substrate rotation module 400 .
- the infrared transmission plate 150 may be formed in a plate shape corresponding to the planar shape of the upper portion of the side wall 111 .
- the infrared transmission plate 150 may be formed of transparent quartz.
- the infrared transmission plate 150 may be positioned between the upper plate 112 and the substrate support 140 on the upper portion of the side wall 111 .
- the infrared transmission plate 150 may separate the chamber upper space 100a of the outer housing 110 into a heat treatment space 100c and a cooling gas space 100d.
- the heat treatment space is a space where the flat substrate (a) is positioned and heat treatment is performed.
- the cooling gas space is a space into which a cooling gas for cooling the infrared transmission plate 150 is introduced, and is located above the heat treatment space.
- the lower surface of the infrared transmission plate 150 may be positioned to face the upper surface of the flat substrate (a) at the top of the flat substrate (a).
- the infrared transmission plate 150 forms the upper surface of the outer housing 110, and the side wall 111 and the upper plate 112 of the upper part of the infrared transmission plate 150 are separately formed, so that the infrared transmission plate 150 It can be coupled to the upper part of.
- the infrared transmission plate 150 is formed of transparent quartz and can transmit radiant energy generated from the flat substrate (a) to the outside during the heat treatment process.
- the infrared transmission plate 150 may transmit radiant energy of wavelengths including infrared rays to the outside.
- the infrared transmission plate 150 is maintained at a temperature of 400 ° C or less, and may be preferably maintained at a temperature of 300 to 400 ° C. Since the infrared transmission plate 150 is maintained at a temperature of 300 to 400° C., chemical deposition by process gas is prevented, thereby preventing an increase in emissivity due to deposition.
- the process gas may be different according to the type of heat treatment process. For example, as a process gas in the epitaxial process, gases such as SiH 4 , SiH 2 Cl 2 , SiHCl 3 , or SiCl 4 may be used.
- the temperature of the cooling gas is 400° C. or less, chemical vapor deposition may be significantly reduced.
- the emissivity of the infrared transmission plate 150 does not increase according to the number of heat treatment processes, a process temperature difference between the flat substrates (a) on which the process is performed can be reduced.
- the beam irradiation module 200 may include an element array plate 210 and a VCSEL element 220 .
- the beam irradiation module 200 may be positioned outside the lower portion of the process chamber 100 and irradiate a laser beam to the lower surface of the flat substrate (a) through the beam irradiation plate 130 .
- the beam irradiation module 200 may be located below the beam irradiation plate 130 inside the inner housing 120 .
- a plurality of VCSEL elements 220 may be arranged in a lattice shape on the upper surface of the element array plate 210 .
- the VCSEL elements 220 may be arranged in an x-direction and a y-direction on the upper surface of the element array plate 210 in a lattice shape.
- the element array plate 210 may be formed in a plate shape having a predetermined area and thickness.
- the element array plate 210 may be formed to correspond to the shape and area of the flat substrate (a).
- the element array plate 210 may be formed of a thermally conductive ceramic material or metal material.
- the element array plate 210 may serve to dissipate heat generated from the VCSEL element 220 .
- the VCSEL element 220 may include an element substrate 221, a laser light emitting element 222, an electrode terminal 223, and a cooling block 224.
- a plurality of the VCSEL elements 220 may be arranged on the element array plate 210 in a lattice direction.
- the VCSEL element 220 may be arranged on a surface of the element array plate 210 in an area necessary for irradiating a laser beam to the irradiation area of the flat substrate (a).
- the device substrate 221 may be coupled to the cooling block 224 by a separate adhesive layer 226 .
- a supply current may be supplied to a plurality of VCSEL elements so that light output becomes uniform. That is, since the supply current supplied to each of the VCSEL elements is individually controlled, light output may be uniform throughout.
- the optical power may mean radiant energy or output of a laser beam irradiated in VCSEL irradiation.
- the light output may be measured using a measuring means such as a pyrometer.
- the VCSEL elements may be individually supplied with different supply currents according to a previously evaluated relationship between supply current and light output. Accordingly, the VCSEL devices can uniformly control the light output as a whole and reduce the temperature deviation of the flat substrate.
- different supply currents may be independently supplied to the central portion and the outer portion of the VCSEL device based on the plane of the semiconductor wafer.
- the VCSEL element is divided into a plurality of zones, and a different supply current can be supplied independently for each zone.
- different supply currents may be supplied to the VCSEL devices even in this case. Since the laser light emitting unit constituting the VCSEL device has a unique light efficiency, the output light output may not be the same even when the same current is supplied. Therefore, the VCSEL element can measure the output according to the supply current for each element in advance, and individually determine and supply the supply current for the required output.
- the VCSEL element 220 is formed by arranging a plurality of laser light emitting units 222 in the x-axis direction and the y-axis direction.
- the VCSEL element 220 includes a light emitting frame (not shown) for fixing the laser light emitting unit 222 and a power line (not shown) for supplying current to the laser light emitting unit 222.
- the VCSEL element 220 may be formed such that the same current is applied to the entire laser light emitting unit 222 .
- the VCSEL element 220 may be formed so that different powers are applied to each laser light emitting unit 222 .
- the device substrate 221 may be formed of a general substrate used to mount electronic devices.
- the device substrate 221 may be divided into an device area 221a where the laser light emitting unit 222 is mounted and a terminal area 221b where terminals are mounted.
- a plurality of laser light emitting units 222 may be arranged in a lattice shape and mounted in the device region 221a.
- the terminal area 221b is positioned in contact with the device area 221a and a plurality of terminals may be mounted thereon.
- the laser light emitting unit 222 may be formed of various light emitting elements that emit a laser beam.
- the laser light emitting unit 222 may be preferably formed as a Vertical Cavity Surface Emitting Laser (VCSEL) unit.
- the VCSEL unit may irradiate a laser beam of a single wavelength of 940 nm.
- the VCSEL unit is formed in a quadrangular shape, and preferably may be formed in a square or rectangular shape in which the ratio of width to length does not exceed 1:2.
- the VCSEL unit is manufactured as a hexahedral chip, and a high-output laser beam is oscillated on one side. Since the VCSEL unit oscillates a high-output laser beam, the rate of temperature rise of the flat substrate (a) can be increased compared to conventional halogen lamps, and the lifetime is relatively long.
- a plurality of the laser light emitting units 222 may be arranged in an x-direction and a y-direction in the device region 221a on the upper surface of the device substrate 221 and arranged in a lattice shape.
- the laser light emitting units 222 may be formed in an appropriate number at appropriate intervals according to the area of the element region 221a and the amount of energy of the laser beam irradiated to the flat substrate (a).
- the laser light emitting units 222 may be positioned at intervals capable of radiating uniform energy when a laser beam emitted overlaps with a laser beam of an adjacent laser light emitting unit 222 . At this time, the laser light emitting unit 222 may be positioned so that the adjacent laser light emitting element 222 and the side surface are in contact with each other so that there is no separation distance.
- the electrode terminal 223 may be formed in plurality in the terminal region 221b of the device substrate 221 .
- the electrode terminal 223 includes a + terminal and a - terminal, and may be electrically connected to the laser light emitting unit 222 .
- the electrode terminal 223 may be electrically connected to the laser light emitting unit 222 in various ways.
- the electrode terminal 223 may supply current necessary for driving the laser light emitting unit 222 .
- the cooling block 224 may be formed to have a planar shape and a predetermined height corresponding to the planar shape of the device substrate 221 .
- the cooling block 224 may be formed of a thermally conductive ceramic or metal material.
- the cooling block 224 may be coupled to the lower surface of the device substrate 221 by a separate adhesive layer.
- the cooling block 224 may emit heat generated from the laser light emitting unit 222 mounted on the surface of the device substrate 221 downward. Thus, the cooling block 224 can cool the device substrate 221 and the laser light emitting unit 222 .
- the cooling block 224 may have a cooling channel 224a through which cooling water flows.
- the cooling passage 224a has an inlet and an outlet formed on a lower surface, and may be formed as a passage in various shapes inside the cooling block 224 .
- the gas dispensing module 300 may include a gas dispensing plate 310 , a gas supply pipe 320 and a gas discharge pipe 330 .
- the gas dispensing module 300 may cool the infrared penetrating plate 150 by injecting a cooling gas onto the upper surface of the infrared penetrating plate 150 .
- the cooling gas may be nitrogen gas, argon gas or compressed cooling air.
- the gas dispensing plate 310 is formed in a plate shape and may have a gas dispensing hole 311 penetrating from an upper surface to a lower surface.
- the gas injection plate 310 may be positioned parallel to the infrared transmission plate 150 between the upper plate 112 and the infrared transmission plate 150 on the top of the outer housing 110 .
- the gas dispensing plate 310 may separate the gas dispensing space into an upper gas space and a lower gas space.
- the gas dispensing hole 311 is formed to penetrate from the upper surface of the gas dispensing plate 310 to the lower surface. That is, the gas injection hole 311 may connect the upper gas space and the lower gas space. The gas dispensing hole 311 may inject the cooling gas flowing into the gas dispensing space from the outside into the lower gas space.
- a plurality of gas dispensing holes 311 may be formed to be entirely spaced apart from the gas dispensing plate 310 .
- the gas dispensing hole 311 may more uniformly inject the cooling gas supplied into the upper gas space into the lower gas space. Therefore, the gas injection plate 310 can more uniformly cool the lower infrared transmission plate 150 .
- the gas supply pipe 320 is formed in a tubular shape with both sides open, and is coupled to pass through the inside of the outer housing 110 from the top plate 112 of the outer housing 110 . That is, the gas supply pipe 320 passes through the upper plate 112 from the outside into the upper gas space.
- the gas supply pipe 320 may be formed in plurality according to the area of the upper plate 112 .
- the gas supply pipe 320 may be connected to an external cooling gas supply device to receive cooling gas.
- the gas discharge pipe 330 is formed in a tubular shape with both sides open, and may be coupled to the sidewall 111 of the outer housing 110 so as to penetrate outward in the lower gas space. That is, the gas discharge pipe 330 penetrates the lower gas space through the side wall 111 from the outside.
- the gas discharge pipe 330 may be formed in plurality according to the area of the upper plate 112 .
- the gas discharge pipe 330 may discharge the cooling gas flowing into the lower gas space to the outside.
- the substrate rotating module 400 may include an inner rotating unit 410 and an outer rotating unit 420 .
- the substrate rotation module 400 may rotate the substrate support 140 in a non-contact horizontal direction. More specifically, the inner rotation unit 410 may be coupled to the lower portion of the substrate support 140 in the chamber lower space 100b of the process chamber 100 .
- the outer rotation means 420 may be positioned to face the inner rotation means 410 outside the process chamber 100 . The outer rotation means 420 may rotate the inner rotation means 410 in a non-contact manner using magnetic force.
- the inner rotation means 410 may be formed in the same structure as a rotor of a motor.
- the inner rotation unit 410 may be formed in a ring shape as a whole and have a magnet structure in which N poles and S poles are alternately formed along the circumferential direction.
- the inner rotation unit 410 may be coupled to the lower portion of the substrate support 140, that is, to the connection support 142. At this time, the inner rotating means 410 may be positioned to be spaced apart from the top of the lower plate 113 upward.
- the inner rotation means 410 may be supported by a separate support means to prevent vibration during rotation or to rotate smoothly.
- the inner rotation unit 410 may be supported by a support bearing or a roller at the bottom.
- the outer rotation means 420 may be formed in the same structure as a stator of a motor.
- the outer rotation means 420 may include an iron core formed in a ring shape and a wire wound around the iron core.
- the outer rotation means 420 may rotate the inner rotation means 410 with magnetic force generated by power supplied to the wire.
- the outer rotation means 420 may be located outside the outer housing 110 to face the inner rotation means 410 based on the outer housing 110 . That is, the outer rotation means 420 may be positioned outside the outer housing 110 at the same height as the inner rotation means 410 .
- FIG. 5 is a plan view showing a position for measuring the temperature of a semiconductor wafer in the substrate heat treatment apparatus of FIG. 1 .
- FIG. 6 is a table of measurement data of supply current and measured light output for each time interval of VCSEL elements constituting the beam irradiation module of FIG. 5 .
- 7 shows a graph and a three-dimensional equation for the correlation of the seventh VCSEL element.
- 8 shows a graph and a three-dimensional equation for the correlation of the eighth VCSEL element.
- 9 shows a graph and a three-dimensional equation for the correlation of the ninth VCSEL element.
- a supply current supplied to each of the plurality of VCSEL elements used in the beam irradiation module 200 and a laser beam output according to the supply current are experimentally measured.
- the correlation between the supply current and the output is set using the measurement result of the VCSEL device.
- the VCSEL element may have different outputs even when the same current is supplied, depending on the characteristics of each laser light emitting unit and the electrical resistance of wires connecting the laser light emitting units. That is, since the laser light emitting unit constituting the VCSEL device has a unique light efficiency, the output light output may not be the same even when the same current is supplied. Therefore, the VCSEL element can measure the output according to the supply current for each element in advance, and individually determine and supply the supply current for the required output. In particular, different supply currents may be supplied to the VCSEL element so that the output thereof is the same as a whole.
- the correlation may be an equation or a look-up table for the supply current supplied to the VCSEL element and the optical power of the laser beam of the VCSEL element.
- the correlation is set for all VCSEL elements used in the beam irradiation module 200, respectively. Accordingly, all of the VCSEL elements may be correlated with each other prior to being mounted in the beam irradiation module 200 .
- temperature uniformity can be relatively increased in terms of temperature uniformity compared to the existing method of controlling only a part of the range from relatively few calibration values.
- the above correlation can be established as an equation after experimentally measuring the supply current supplied to each VCSEL element and the resulting output.
- the output may be an optical power measured at a location spaced a certain distance from the VCSEL element.
- the separation distance may be the distance between the VCSEL element and the substrate in the substrate heat treatment apparatus on which the VCSEL element is actually mounted.
- the output may be an optical power measured by a pyrometer located at a position spaced a certain distance from the VCSEL element.
- the output may be the temperature of the substrate to which the laser beam is irradiated.
- the separation distance may be the distance between the VCSEL element and the substrate in the substrate heat treatment apparatus on which the VCSEL element is actually mounted.
- the correlation can be established by a three-dimensional equation.
- the correlation can be set as light output to supply current.
- the supply current is supplied to the VCSEL element to be set while increasing from 0.000A to 5.530 at intervals of 0.005 to 0.010A.
- the supply current is increased at intervals of 0.2 seconds.
- the light output is measured using a pyrometer located at a set separation distance from the VCSEL element.
- 6 is a table of measurement data of supply current and measured light output for each time interval. The data displayed in FIG. 6 represents only a part of measurement data. As shown in FIG. 6 , it can be seen that the supply current increases at intervals of 0.02 seconds and the light output also increases.
- a three-dimensional function is determined by fitting data of the supplied current and the measured light output for the VCSEL element.
- FIGS. 7, 8, and 9 graphs of supply current and light output are shown, and a three-dimensional equation for the graphs is set.
- the graphs shown in FIGS. 7, 8, and 9 are set as 3D equations through a fitting process. It can be seen that No. 7, No. 8, and No. 9 are different from each other in the coefficients of each three-dimensional equation. Therefore, it can be confirmed that each VCSEL element has a difference in light output even when the supplied current is the same.
- a 3D equation for supply current and light output is set as a 3D equation for each VCSEL element.
- the table of supply current and light output shown in FIG. 6 may be used as a lookup table. That is, the table of FIG. 6 displays the light output with respect to the supply current at intervals of 0.005 to 0.010 A from 0.000 A to 5.530 for the correlation between the supply current and the light output for each VCSEL device. Accordingly, the table of FIG. 6 can be used as a lookup table displaying supply current and light output for each VCSEL element.
- the correlation between the supply current and light output may be set by a 2-dimensional equation or a 4-dimensional or higher equation in addition to a 3-dimensional equation.
- the above correlation is set as the input (i.e. x value) is the supply current and the output (i.e. y value) is the light output, but conversely the input (i.e. x value) is the light output and the output (i.e. the y value) y value) can be set as the supply current.
- a supply current required for each VCSEL element of the beam irradiation module to output the same light output is calculated by a cubic equation set for each VCSEL element.
- the VCSEL elements are controlled to receive the calculated supply current and output a laser beam.
- the beam irradiation module 200 is mounted on a substrate heat treatment apparatus, and may irradiate a laser beam to heat a flat substrate.
- the VCSEL element may irradiate the flat substrate with a laser beam having an output required to heat the flat substrate to a set heating temperature.
- the output of the VCSEL element may be set in advance according to the heating temperature of the flat substrate.
- the output of the VCSEL element may be changed by measuring the heating temperature of the flat substrate in real time during the heating process.
- Each of the VCSEL elements may be supplied with a supply current for required output. At this time, the supply current may be determined according to a preset correlation. Different supply currents may be supplied to the VCSEL elements according to a set correlation.
- the beam irradiation module 200 may include a control module for controlling supply current supplied to each VCSEL element.
- FIG. 10 is a graph of a result of measuring a temperature distribution in the semiconductor wafer of FIG. 5 .
- 11 is a graph of a result of measuring a temperature distribution of a semiconductor wafer in a conventional substrate heat treatment apparatus.
- the substrate heat treatment apparatus is set to heat the central portion of the semiconductor substrate to 528°C and heat the outer portion to 509°C.
- the beam irradiation module 200 of the substrate heat treatment apparatus sets the supply current supplied to each VCSEL element to an output required for a set heating temperature. That is, each of the VCSEL elements receives a different supply current and irradiates a laser beam.
- the flat substrate used a semiconductor wafer. As shown in FIG. 5 , the substrate heat treatment apparatus measures the temperature at each of 18 locations of the semiconductor substrate. As shown in FIG. 10 , the flat substrate is heated in the range of 526 to 530° C. in the center and heated in the range of 508 to 510° C. in the outer portion. It can be seen that the flat substrate is uniformly heated in a relatively narrow temperature range.
- the conventional substrate heat treatment apparatus heats a semiconductor wafer in a relatively wide temperature range.
- the device module of the substrate heat treatment apparatus may supply a supply current to the VCSEL device in a constant current method. That is, all of the element modules receive the same supply current and output laser beams. The element module irradiates laser beams of different outputs, and the semiconductor wafer has a wide temperature range to be heated. In addition, it can be confirmed that the semiconductor wafer is not clearly distinguished between the temperature of the central part and the outer part.
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Abstract
Description
Claims (9)
- 내부에 열처리되는 평판 기판이 위치하는 공정 챔버 및복수 개의 VCSEL 소자를 포함하며, 상기 평판 기판으로 레이저 빔을 조사하는 빔 조사 모듈을 포함하며,상기 빔 조사 모듈은 상기 VCSEL 소자들의 출력이 동일하게 되도록 공급 전류가 제어되는 것을 특징으로 하는 기판 열처리 장치.
- 제 1 항에 있어서,상기 VCSEL 소자는 각각 서로 다른 공급 전류가 공급되는 것을 특징으로 하는 기판 열처리 장치.
- 제 1 항에 있어서,상기 VCSEL 소자는 각각 공급 전류와 출력에 대한 상관 관계가 미리 설정되는 것을 특징으로 하는 기판 열처리 장치.
- 제 2 항에 있어서,상기 VCSEL 소자의 상관 관계는 방정식 또는 룩업 테이블로 설정되는 것을 특징으로 하는 기판 열처리 장치.
- 제 3 항에 있어서,상기 VCSEL 소자는 각각 상기 상관 관계에 따라 필요로 하는 출력을 위한 공급 전류가 공급되는 것을 특징으로 하는 기판 열처리 장치.
- 제 1 항에 있어서,상기 공정 챔버는상기 평판 기판의 하부에 위치하는 빔 조사판과 상기 평판 기판의 상부에 위치하는 적외선 투과판과, 상기 평판 기판이 내부에 안착되는 측벽과, 상기 측벽의 내부에서 상기 평판 기판의 상부에 상기 적외선 투과판과 상부판이 위치하는 외부 하우징 및 상기 외부 하우징의 내측에서 상기 평판 기판의 하부에 위치하며 상기 빔 조사판이 상부에 위치하는 내부 하우징을 포함하며,상기 빔 조사 모듈은 상기 내부 하우징의 내부에서 상기 빔 조사판의 하부에 위치하는 것을 특징으로 하는 기판 열처리 장치.
- 제 6 항에 있어서,상기 적외선 투과판은 투명 쿼쯔로 형성되는 것을 특징으로 하는 기판 열처리 장치.
- 제 6 항에 있어서,상기 공정 챔버는 상기 평판 기판의 외측을 지지하는 기판 지지대를 더 포함하며,상기 VCSEL을 이용한 기판 열처리 장치는 상기 기판 지지대를 지지하여 회전시키는 기판 회전 모듈을 더 포함하는 것을 특징으로 하는 기판 열처리 장치.
- 제 8 항에 있어서,상기 기판 회전 모듈은N극과 S극이 원주 방향을 따라 교대로 형성되는 링 형상이며, 상기 챔버 하부 공간의 내부에서 기판 지지대의 하부에 결합되는 내측 회전 수단 및상기 외부 하우징의 외측에서 상기 내측 회전 수단과 대향하여 위치하며 자력을 발생시켜 상기 내측 회전 수단을 회전시키는 외측 회동 수단을 구비하는 것을 특징으로 하는 기판 열처리 장치.
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US18/721,571 US20250062142A1 (en) | 2021-12-30 | 2022-12-28 | Substrate heat treatment apparatus cotrolling individually the output of the vcsel module |
CN202280084065.1A CN118435337A (zh) | 2021-12-30 | 2022-12-28 | 可单独控制垂直腔面发射激光器器件输出的基板热处理装置 |
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US (1) | US20250062142A1 (ko) |
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CN118712105A (zh) * | 2024-08-29 | 2024-09-27 | 一塔半导体(安徽)有限公司 | 一种快速热退火装置 |
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JP2001244212A (ja) * | 2000-03-02 | 2001-09-07 | Ushio Inc | 白熱ランプ点灯制御方法および光照射式加熱装置 |
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JP2014182061A (ja) * | 2013-03-21 | 2014-09-29 | Dainippon Screen Mfg Co Ltd | 温度測定装置および熱処理装置 |
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KR20210149382A (ko) * | 2020-06-02 | 2021-12-09 | 주식회사 비아트론 | Vcsel를 이용한 기판 열처리 장치 |
-
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- 2022-12-28 US US18/721,571 patent/US20250062142A1/en active Pending
- 2022-12-28 CN CN202280084065.1A patent/CN118435337A/zh active Pending
- 2022-12-28 KR KR1020220186839A patent/KR20230104009A/ko active Pending
- 2022-12-28 WO PCT/KR2022/021502 patent/WO2023128606A1/ko active Application Filing
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JP2001244212A (ja) * | 2000-03-02 | 2001-09-07 | Ushio Inc | 白熱ランプ点灯制御方法および光照射式加熱装置 |
KR20110009187A (ko) * | 2008-06-25 | 2011-01-27 | 도쿄엘렉트론가부시키가이샤 | 어닐링 장치 |
JP2014182061A (ja) * | 2013-03-21 | 2014-09-29 | Dainippon Screen Mfg Co Ltd | 温度測定装置および熱処理装置 |
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US20250062142A1 (en) | 2025-02-20 |
CN118435337A (zh) | 2024-08-02 |
KR20230104009A (ko) | 2023-07-07 |
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