WO2013145348A1 - 半導体素子用基板の反り矯正装置及び反り矯正方法 - Google Patents
半導体素子用基板の反り矯正装置及び反り矯正方法 Download PDFInfo
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- WO2013145348A1 WO2013145348A1 PCT/JP2012/067989 JP2012067989W WO2013145348A1 WO 2013145348 A1 WO2013145348 A1 WO 2013145348A1 JP 2012067989 W JP2012067989 W JP 2012067989W WO 2013145348 A1 WO2013145348 A1 WO 2013145348A1
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- semiconductor element
- element substrate
- injection
- warpage
- substrate
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- H10P95/00—
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/10—Measuring as part of the manufacturing process
- H01L22/12—Measuring as part of the manufacturing process for structural parameters, e.g. thickness, line width, refractive index, temperature, warp, bond strength, defects, optical inspection, electrical measurement of structural dimensions, metallurgic measurement of diffusions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/30—Electron-beam or ion-beam tubes for localised treatment of objects
- H01J37/317—Electron-beam or ion-beam tubes for localised treatment of objects for changing properties of the objects or for applying thin layers thereon, e.g. for ion implantation
- H01J37/3171—Electron-beam or ion-beam tubes for localised treatment of objects for changing properties of the objects or for applying thin layers thereon, e.g. for ion implantation for ion implantation
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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
- H01L21/02—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
- H01L21/26—Bombardment with radiation
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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
- H01L21/02—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
- H01L21/26—Bombardment with radiation
- H01L21/263—Bombardment with radiation with high-energy radiation
- H01L21/265—Bombardment with radiation with high-energy radiation producing ion implantation
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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
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67288—Monitoring of warpage, curvature, damage, defects or the like
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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
- H01L21/6838—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 with gripping and holding devices using a vacuum; Bernoulli devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/20—Sequence of activities consisting of a plurality of measurements, corrections, marking or sorting steps
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/20—Sequence of activities consisting of a plurality of measurements, corrections, marking or sorting steps
- H01L22/26—Acting in response to an ongoing measurement without interruption of processing, e.g. endpoint detection, in-situ thickness measurement
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/01—Manufacture or treatment
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- H10P72/0616—
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- H10P72/78—
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- H10P74/23—
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
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- H10P74/203—
Definitions
- the present invention relates to a warp correction device and a warp correction method for a semiconductor element substrate for correcting a warp generated in a semiconductor element substrate such as a sapphire substrate.
- a semiconductor element such as a light emitting diode is manufactured by forming a semiconductor film, for example, a GaN-based compound semiconductor film by epitaxial crystal growth on a main surface (polished surface) of a semiconductor element substrate such as sapphire, and forming an electrode or the like. .
- the semiconductor film is formed while heating the semiconductor element substrate, and then cooled to room temperature. For this reason, a warp that protrudes toward the semiconductor film side occurs due to a difference in thermal expansion between the semiconductor element substrate and the semiconductor film during cooling.
- Patent Document 1 discloses a technique for correcting the warp using a large press device that presses with a pressure of 4.9 ⁇ 10 4 to 4.9 ⁇ 10 6 Pa.
- Patent Document 2 discloses a technique for correcting a warp by modifying the inside of the sapphire substrate by condensing and scanning a pulse laser.
- Patent Document 1 it is necessary to provide a press mechanism in an MOCVD apparatus that performs epitaxial growth, which increases the cost of the apparatus and is not suitable for mass production.
- the frequency of occurrence of cracks in the semiconductor element substrate during pressing increases, and the yield may decrease.
- An apparatus is a warp correction device that corrects a warp of a semiconductor element substrate, and a spray material to a back surface that is opposite to a main surface or opposite to a film formation surface of the semiconductor element substrate.
- An injection mechanism having a nozzle for performing an injection process, an adsorption table that adsorbs a main surface or a film formation surface of the semiconductor element substrate and holds the semiconductor element substrate, and an injection region of an injection material by the nozzle
- a moving mechanism for moving the suction table so that the semiconductor element substrate moves relative to the semiconductor element substrate, and an injection processing chamber in which the semiconductor element substrate held on the suction table is accommodated and an injection process is performed inside
- a measurement mechanism for measuring the warpage amount of the semiconductor element substrate, and a difference between a preset target warpage amount and the warpage amount of the semiconductor element substrate measured by the measurement mechanism.
- the apparatus is configured by means having a low apparatus cost such as an injection mechanism, and is appropriate based on a preset target warpage amount and a warpage amount of the semiconductor element substrate measured by the measurement mechanism. It is possible to perform an injection process for correcting warpage of the semiconductor element substrate by setting appropriate injection process conditions. For this reason, according to this apparatus, the curvature of the board
- the apparatus may perform pass / fail determination by measuring a warpage amount of the semiconductor element substrate subjected to the injection process by a measurement mechanism and determining whether the warpage amount is equal to or less than a target warpage amount (within an allowable range of the target warpage amount). Therefore, the yield can be improved and the warp correction process can be performed efficiently.
- the suction table is provided in a region on which the semiconductor element substrate is placed, and a suction portion that sucks and fixes the semiconductor element substrate; and in the region and from the suction portion And a purge unit that is provided on the outer edge side of the region and injects compressed air from the gap formed between the outer edge of the semiconductor element substrate and the suction table toward the outside of the region.
- the semiconductor element substrate is warped when it is sucked and fixed to the suction table. For this reason, a gap is formed between the semiconductor element substrate and the suction table at the outer peripheral edge of the semiconductor element substrate, and the injection surface enters and the deposition surface on which the semiconductor film is formed on the main surface of the semiconductor element substrate Or the main surface may be damaged.
- the purge portion injects compressed air from the gap between the semiconductor element substrate and the suction table to the outside of the region on which the semiconductor element substrate is placed. Intrusion can be prevented. For this reason, it can prevent that the board
- the suction table is provided at a position corresponding to a region where at least an outer edge of the semiconductor element substrate is not formed with a semiconductor element, and includes a suction portion that sucks and fixes the semiconductor element substrate. May be.
- the semiconductor element substrate can be adsorbed and held in the outer edge (near the outer periphery) area of the semiconductor element substrate where the semiconductor element is not formed.
- the element can be prevented from being damaged.
- At least one of the injection mechanism and the suction table causes the semiconductor element to be injected to the injection material injection region by the nozzle so that the injection material is injected onto the entire back surface of the semiconductor element substrate.
- the working substrate may be scanned relatively.
- a suction part that sucks and removes the spray material is provided on one side surface of the jet processing chamber, and the semiconductor element substrate is held on the other side surface of the jet processing chamber.
- An opening through which the suction table passes is formed, and when the suction table holding the semiconductor element substrate is inserted, the opening allows outside air to flow between the suction table or the semiconductor element substrate. You may open to the magnitude
- the inside of the injection processing chamber may be partitioned by a wall portion in which a slit that does not hinder movement of the semiconductor element substrate is formed.
- the suction table is configured to be movable in a horizontal plane by the moving mechanism, and both end portions of the wall portion are connected to an upper surface and a bottom portion of the injection processing chamber, and the nozzle The slit may be formed at a position overlapping with a movable horizontal plane of the suction table.
- the wall can prevent the spray material from diffusing throughout the spray processing chamber. Further, it is possible to avoid the operation for processing the semiconductor element substrate from being obstructed by the slit.
- the apparatus may include a cleaning mechanism that is provided on a side surface on the opening side of the injection processing chamber and that removes the injection material adhering to the semiconductor element substrate.
- control device performs the injection process again when it is determined in the pass / fail determination that the warp of the semiconductor element substrate subjected to the injection process is larger than the target warp amount. May be operated.
- the warpage amount of the semiconductor element substrate is measured after the warp correction processing, and when it is determined that the warpage amount is larger than the target warpage amount, the warpage correction processing is performed again, so that the yield can be improved. At the same time, the warp correction process can be performed efficiently.
- control device sets the injection processing condition based on a temporary target warp amount larger than the target warp amount and performs the injection processing, and the injection processing based on the target warp amount after the rough correction processing.
- the injection mechanism may be operated so as to perform a finish correction process for setting conditions and performing an injection process.
- a method includes a measurement mechanism for measuring a warpage amount of a semiconductor element substrate, a preset target warpage amount, and warpage amount data of the semiconductor element substrate measured by the measurement mechanism.
- the semiconductor is subjected to warpage correction processing for setting warpage correction processing for correcting warpage of the semiconductor element substrate by jetting an injection material on the back surface, and the warpage correction processing.
- a control device for performing at least one of pass / fail judgment of the element substrate and a nozzle for performing an injection process for injecting an injection material to the back surface opposite to the main surface or the film forming surface of the semiconductor element substrate A semiconductor element substrate warpage correction method using a semiconductor element substrate warpage correction apparatus.
- This method calculates a difference between a step of measuring a warpage amount of a substrate for a semiconductor element by the measurement mechanism, warpage amount data measured by the measurement mechanism, and a preset target warpage amount, and performs an injection process.
- a step of setting conditions, a step of performing a warp correction process by spraying an injection material from the back surface opposite to the main surface of the semiconductor element substrate or the opposite side of the film formation surface under the spray processing conditions, and warp correction And determining whether or not the warpage amount of the processed semiconductor element substrate is equal to or less than a preset target warpage amount.
- a method for correcting a warp of a semiconductor element substrate using the above-described warp correction apparatus for a semiconductor element substrate wherein the warpage amount of the semiconductor element substrate is measured.
- a step of measuring by the mechanism a step of transporting the semiconductor element substrate whose warpage amount is measured onto the suction table, and holding the semiconductor element substrate on the suction table, and a warpage amount measured by the measurement mechanism.
- warp correction process On the basis of a difference between the target warpage amount and a preset target warpage amount, and a step of setting an injection process condition of the injection mechanism and an opposite side of the main surface of the semiconductor element substrate or the film formation surface in the injection process condition
- warp correction Amount of warpage of the substrate for a semiconductor device management has been performed, comprising a step of determining whether or not less than the target amount of warpage preset, the.
- the warp of the semiconductor element substrate can be corrected without requiring a complicated processing step.
- the manufacturing cost of a curvature correction apparatus can be made cheap.
- the size of the warp correction device can be reduced.
- the warpage amount of the semiconductor element substrate may be calculated by measuring and calculating heights from 3 to 6 reference positions with respect to one straight line. With this configuration, the warpage amount of the semiconductor element substrate can be measured with a small number of measurement points, so that the processing time can be shortened.
- the step of performing the warp correction treatment may be performed before the step of forming a resist film for forming a circuit pattern on the thin film layer formed on the semiconductor element substrate.
- a warp correction apparatus and a warp correction method for a semiconductor element substrate capable of correcting the warp of the semiconductor substrate by a method suitable for mass production efficiently are provided.
- FIG. 5 is a sectional view taken along line VV shown in FIG. 4. It is explanatory drawing which shows the structure of an adsorption
- suction table. 6A is a longitudinal sectional view
- FIG. 6B is a BB cross-sectional view of FIG. 6A, and FIG.
- FIG. 6C is a CC cross-sectional view of FIG. 6A. It is a flowchart which shows operation
- the warp correction device is, for example, a device that corrects warpage by spraying an injection material onto a semiconductor element substrate.
- the semiconductor element substrate for correcting the warp with the warp correction device is a substrate made of, for example, sapphire, SiC, GaAS, GaP, GaAlAs, etc., and a semiconductor film such as a GaN-based compound semiconductor film is formed on the main surface, A substrate for forming a semiconductor element such as a light emitting diode (LED) element or a laser diode (LD) element.
- a semiconductor element such as a light emitting diode (LED) element or a laser diode (LD) element.
- FIG. 1 shows a conceptual diagram of a method for correcting warpage of a substrate for a semiconductor element by an injection process.
- a substrate W for a semiconductor element such as a sapphire wafer on which a semiconductor film G such as a GaN-based compound is formed has a warp such that the deposition surface side on which the semiconductor film G is formed is convex on the main surface. Warp is corrected without damaging the film-forming surface or the main surface of the semiconductor element substrate W by injecting and colliding the injection material F with the nozzle N on the back surface side of the substrate W for semiconductor element where the warpage has occurred. can do.
- the warp correction device 1 for a semiconductor element substrate includes, for example, an injection mechanism 10, a transport mechanism 52, a suction table 20, a moving mechanism 30, a measurement mechanism 51, an injection processing chamber 40, and suction.
- the unit 40b and the control device 54 are provided.
- the injection mechanism 10 includes a nozzle 11 for performing an injection process of injecting an injection material onto the semiconductor element substrate W.
- the transport mechanism 52 transports the semiconductor element substrate W.
- the transport mechanism 52 transports the semiconductor element substrate W between the measurement mechanism 51 and the ejection processing chamber 40, for example.
- the suction table 20 holds the semiconductor element substrate W by sucking the film formation surface or the main surface of the semiconductor element substrate W.
- the moving mechanism 30 moves the suction table 20 so that the semiconductor element substrate W moves relative to the injection region of the injection material by the nozzle 11.
- the measurement mechanism 51 measures the amount of warpage of the semiconductor element substrate W.
- the ejection processing chamber 40 accommodates the semiconductor element substrate W held on the suction table 20. An injection process is performed inside the injection processing chamber 40.
- the suction unit 40 b sucks and removes the spray material from the side surface direction of the suction table 20 in the spray processing chamber 40.
- the control device 54 controls the operation of each of the above devices.
- control device 54 for example, various arithmetic devices such as a personal computer, motion controllers such as a programmable logic controller (PLC) and a digital signal processor (DSP), a high-function mobile terminal, a high-performance mobile phone, and the like may be used. it can.
- PLC programmable logic controller
- DSP digital signal processor
- the semiconductor element substrate W is accommodated in the case 53 with distinction between before and after the warp correction process.
- the injection mechanism 10 includes a nozzle 11 and a storage tank (not shown) that stores the injection material. Moreover, the injection mechanism 10 is provided with the injection material hopper 12, the compressed air supply apparatus (not shown), the collection
- the injection material hopper 12 supplies a predetermined amount of the injection material to the nozzle 11 in a fixed amount.
- the compressed air supply device supplies compressed air to the nozzle 11.
- the collection device 13 is connected to the suction unit 40b and collects the injection material after the injection process.
- the classifying device 14 classifies the injection material collected by the collection device 13 into a usable injection material and an unusable injection material.
- the dust collector 15 exhausts and removes dust from the classifier 14.
- the nozzle 11 includes a gas injection unit 11a, a supply port 11b, a mixing chamber 11c, and an injection material injection unit 11d.
- the gas injection unit 11a is connected to a compressed air supply device.
- the supply port 11b is connected to the injection material hopper 12 and supplies the injection material.
- the mixing chamber 11c communicates with the gas injection unit 11a and the supply port 11b, and mixes the compressed air supplied from the gas injection unit 11a and the injection material supplied from the supply port 11b to form a solid-gas two-phase flow. To do.
- the injection material injection unit 11d injects the solid-gas two-phase flow introduced from the mixing chamber 11c onto the workpiece.
- the nozzle 11 is disposed on the upper surface of the ejection processing chamber 40 so as to be able to eject vertically downward, and can perform an ejection process on the semiconductor element substrate W that is attracted and fixed to the adsorption table 20.
- the nozzle 11 in which the injection port 11e is formed in a rectangular shape is employed. Thereby, since the area
- the injection process of the injection material by the injection mechanism 10 is performed as follows.
- compressed air is supplied to the gas injection unit 11a of the nozzle 11, the compressed air is injected from the tip toward the injection material injection unit 11d.
- the supply amount of the injection material is controlled by the injection material hopper 12, and the injection material is supplied from the supply port 11b to the mixing chamber 11c by the negative pressure generated when the compressed air passes through the mixing chamber 11c from the gas injection unit 11a.
- the injection material conveyed to the mixing chamber 11c is mixed with the compressed air injected from the gas injection unit 11a and accelerated, passes through the injection material injection unit 11d, and is injected from the injection port 11e onto the semiconductor element substrate W. Is done.
- the suction table 20 is formed in a thin rectangular parallelepiped shape having a rectangular horizontal surface.
- One end portion of the suction table 20 is attached to the moving mechanism 30, and a suction portion 21 that sucks the semiconductor element substrate W onto the upper surface (region on which the semiconductor element substrate is placed) of the other end portion on the opposite side.
- the adsorbing portion 21 is formed of, for example, a polyether ether ketone (PEEK) material so that no adsorbing mark is attached to the adsorbing surface of the semiconductor element substrate W.
- PEEK polyether ether ketone
- a negative pressure portion 22 is provided adjacent to the suction portion 21.
- the negative pressure part 22 includes openings arranged concentrically, for example.
- the negative pressure portion 22 is formed so that the position of the opening is a double concentric circle.
- the negative pressure portion 22 communicates with the suction pipe 24 to generate a negative pressure, suck the semiconductor element substrate W, and fix it to the suction portion 21.
- An annular purge portion 23 is formed on the suction table 20 where the semiconductor element substrate W is placed and outside the suction portion 21 (on the outer edge side of the region).
- the purge unit 23 communicates with a purge pipe 25 that supplies compressed air, and directs compressed air outward (outside the region) from a gap formed between the outer edge of the semiconductor element substrate W and the suction table 20. Can be injected.
- the moving mechanism 30 moves the suction table 20 so as to move the semiconductor element substrate W sucked and held by the suction table 20 relative to the injection region FA of the injection material by the nozzle 11, for example, an XY stage. It is a moving mechanism.
- the nozzle 11 is fixed to the injection processing chamber 40, and the semiconductor element substrate W moves relative to the injection region FA of the injection material by moving only the suction table 20.
- the direction of insertion into the moving mechanism 30 in the injection processing chamber 40 is defined as the X direction
- the direction perpendicular to the insertion direction is defined as the Y direction.
- the injection processing chamber 40 is directly connected to the collection device 13 on the side surface opposite to the accommodation port 40a, and a wall portion 40c in which a slit is formed so as not to hinder the horizontal movement of the suction table 20 (see FIG. 9). (See FIG. 5). As shown in FIG.
- the width (height direction) of the slit of the wall portion 40c is larger than the thickness of the semiconductor element substrate W and the suction table 20, and the thickness of the semiconductor element substrate W and the suction table 20 It is formed so that the difference from the slit width is small.
- a suction portion 40 b that sucks and removes the spray material from the side surface of the suction table 20 is formed.
- the housing opening 40a is opened to a size such that a gap is formed between the semiconductor element substrate W and the suction table 20 when the suction table 20 on which the semiconductor element substrate W is placed is inserted.
- the outside air is sucked from the gap by the suction force of the collecting device connected to the suction part 40b.
- an airflow is generated inside the injection processing chamber 40 from the accommodation port 40a toward the suction part 40b. If the containing port 40a is too large, the pressure loss becomes large, and if it is too small, it becomes difficult to suck the outside air, which prevents the generation of the air flow.
- the gap between the housing port 40a and the semiconductor element substrate W can be set to 0.5 mm to 5.0 mm, for example.
- Internal injection processing chamber 40 is partitioned into spaces A 1 and space A 2 by a wall 40c.
- the wall portion 40c extends in a direction (vertical direction) perpendicular to the X direction and the Y direction, and both ends thereof are connected to the ceiling surface (upper surface) and the bottom portion of the injection processing chamber 40, and the injection by the nozzle 11 It is arranged so as to surround the material injection area FA.
- the upper surface of the space A 1 is arranged nozzle 11, most of the injection material injected from the nozzle 11, without going to the space A 2 is inhibited in the wall portion 40c, is recovered by the recovery device
- the A slit is formed in the wall part 40c in the position which overlaps with the horizontal surface in which the adsorption
- the air blow performed by the cleaning mechanism 41 does not inject only compressed air, but may provide other means.
- some moisture or an electrostatic removing agent may be injected with compressed air, ions or radicals may be injected with compressed air by corona discharge or the like, or may be combined with ultrasonic waves (ultrasonic air blow ).
- the measurement mechanism 51 is a device that measures the warp of the semiconductor element substrate W, and employs a known measurement device such as a laser displacement meter, a non-contact measurement device using interference fringes, or a contact measurement device such as a probe. Can do. In this embodiment, a laser displacement meter is employed.
- the transport mechanism 52 is a means for transporting the semiconductor element substrate W between the case 53, the measurement mechanism 51, and the suction table 20, and may be a robot arm, for example.
- FIG. 7 is a flowchart showing the operation of the warp correction apparatus 1.
- the warp of the semiconductor element substrate W on which the semiconductor film is formed is measured by the measurement mechanism 51 (S10, S12).
- the semiconductor element substrate W is transported from the case 53 before processing to the measurement mechanism 51 by the transport mechanism 52 (S10).
- the warpage of the semiconductor element substrate W is measured.
- FIG. 8 shows an example of a method for measuring warpage. As shown in FIG. 8, the semiconductor device substrate W is placed on the measuring table so that the main surface polished on the mirror surface of the semiconductor element substrate W is formed with the semiconductor film formed on the upper surface, and the upper surface is measured by the laser displacement meter. Then, the measurement area is scanned and the height is measured (S12).
- the control device 54 stores a calibration curve that has been measured and set in advance, calculates the difference between this ⁇ t and a preset target warpage amount, and based on the result, the operation of the nozzle 11, etc.
- the injection processing conditions are set.
- the semiconductor element substrate W is transported to the suction table 20 by the transport mechanism 52 (S14).
- the semiconductor element substrate W is placed so that the film-forming surface Ws, in which a semiconductor film is formed on the mirror-polished main surface, is in contact with the suction portion 21 of the suction table 20, and the negative pressure generated in the negative pressure portion 22. Adsorbed and fixed by At this time, compressed air is ejected from the purge unit 23, and the ejected air flows outward from the gap between the film formation surface Ws of the semiconductor element substrate W and the suction table 20.
- the suction table 20 is moved by the moving mechanism 30, and the semiconductor element substrate W is introduced into the ejection processing chamber 40 from the accommodation port 40a of the ejection processing chamber 40 (S14).
- the injection material is injected from the nozzle 11, the suction table 20 is moved by the moving mechanism 30, the semiconductor element substrate W is scanned within the injection region FA of the injection material, and the injection material is uniformly distributed over the entire back surface Wr.
- An injection process is performed so as to be injected (S16).
- the collision energy due to the injection material can be applied to the entire semiconductor element substrate W, so that the warpage can be effectively corrected.
- the collision energy can be effectively applied, and the swell of the semiconductor element substrate W after the injection process can be prevented.
- the scanning trajectory T of the center C of the semiconductor element substrate W scans in the X direction from the end of the semiconductor element substrate W to the injection region FA of the injection material, and in the Y direction at a predetermined pitch.
- This is a trajectory of scanning in a comb shape by repeatedly returning to the X direction after shifting.
- the injection port 11e is formed in a rectangular shape, the injection width of the injection material by one scan in the X direction can be increased by arranging the long side in the Y direction. Therefore, the efficiency of the injection process can be improved.
- the semiconductor element substrate W Since the semiconductor element substrate W is warped downward in the state of being sucked and fixed to the suction table 20, the semiconductor element substrate W is located between the semiconductor element substrate W and the suction portion 21 at the outer peripheral end portion. There is a possibility that a gap is formed and the spray material enters and damages the film formation surface Ws.
- the compressed air is jetted outward from the gap between the film formation surface Ws of the semiconductor element substrate W and the suction table 20 by the purge unit 23, it is possible to prevent the propellant from entering the gap. Therefore, it is possible to prevent the film formation surface Ws from being damaged.
- the spray material sprayed onto the semiconductor element substrate W is sucked and recovered by the recovery device 13 from the suction portion 40b. Since the suction part 40b is configured to suck the spray material from the side surface direction of the suction table 20, the spray material can be made difficult to adhere to the back surface Wr of the semiconductor element substrate W.
- the spray material sucked and collected by the collecting device 13 is classified by the classifying device 14. Of the propellant classified by the classifier 14, only the reusable propellant having a particle diameter equal to or larger than a certain value is reintroduced into the storage tank of the propellant hopper 12 and used. Since the suction part 40b is directly connected to the recovery device 13, the duct wear and pressure loss are small, and a large suction force can be generated to effectively suck and recover the injection material.
- the semiconductor element substrate W for which the injection process has been completed is carried out of the injection process chamber 40 from the accommodation port 40a of the injection process chamber 40 by the moving mechanism 30 (S18). At this time, the jetting material adhering to the semiconductor element substrate W is blown off by the cleaning mechanism 41 disposed in front of the storage port 40a and removed by suction.
- the inside of the injection processing chamber 40 has a negative pressure, the injection material or the like does not leak to the outside from the accommodation port 40a.
- the semiconductor element substrate W for which the injection process has been completed is transported to the measurement mechanism 51 by the transport mechanism 52, and the amount of warpage is measured (S18, S20).
- the control device 54 it is determined whether or not the measured warpage amount is equal to or less than a preset target warpage amount.
- the warp correction processing is terminated, and the semiconductor element substrate W is transported by the transport mechanism 52 and the processed semiconductor It is accommodated in the case 53 for the element substrate W (S22: Yes, S23).
- the transport mechanism 52 takes out the unprocessed semiconductor element substrate W from the unprocessed case 53 and provides it to a warp correction process (jetting process).
- the injection processing condition is set based on the warpage amount, and the warp correction processing is performed again (S22: No, S24: setting process). That is, the above-described steps S14 to S20 are executed again. If the warpage amount is larger than the target warpage amount even after the second warp correction process, it may be disposed as a rejected product. Thereby, while being able to improve a yield, the curvature correction process can be performed efficiently. Note that how many times the warp correction processing is repeated can be set as appropriate. This completes the operation shown in FIG.
- the warp correction process shown in FIG. 7 includes a rough correction process in which an injection process condition is set based on a provisional target warp amount larger than the target warp amount and warp correction process (injection process) is performed, and a target warp after the rough correction process. It can also be performed in two stages: a finishing correction process in which the injection process condition is set based on the amount and fine adjustment is performed.
- an injection processing condition is set so that the rough target processing is a temporary target warpage amount of 50 ⁇ m or less. After performing the injection process and measuring the warpage amount, it is possible to perform the injection process again by setting an injection processing condition for setting the warpage amount to 20 ⁇ m or less. Thereby, processing efficiency can be improved in rough correction processing, and correction accuracy can be ensured by finishing correction processing.
- the warp correction process is terminated without performing the finish correction process.
- the injection conditions such as the injection material, the injection speed and the injection pressure, and the scanning conditions for the semiconductor element substrate W are appropriately selected and set in accordance with the semiconductor element substrate material, the semiconductor film material, the warpage amount, and the like. .
- the propellant may be made of any material as long as it can give sufficient impact energy to the semiconductor element substrate W.
- alumina abrasive grains having an average particle diameter of 10 to 70 ⁇ m can be preferably used. If the average particle diameter is too large, the surface roughness of the back surface Wr of the semiconductor element substrate W is lowered, and if it is too small, the collision energy may be insufficient.
- the injection amount depends on the supply amount of the injection material to the nozzle. If the spray material is excessively supplied to the nozzle in order to increase the injection amount, the spray material cannot be supplied satisfactorily to the nozzle. There is a risk of not.
- the scanning conditions of the suction table 20 also depend on the type of nozzle 11. For example, when a rectangular nozzle 11 having an injection port 11e of 15 ⁇ 4.8 mm is used, the relative movement speed of the suction table 20 is selected from 5 to 200 mm / sec in consideration of the coverage, and the feed pitch is 20 mm. It can be. However, since the range of the injection area FA injected from the nozzle 11 varies depending on the injection distance, it is necessary to select an optimum feed pitch for the injection distance.
- the semiconductor element substrate W whose warp has been corrected by the warp correction apparatus 1 forms a resist film and performs etching, whereby a circuit pattern is formed on the semiconductor film (thin film layer).
- a photoresist is generally used for forming the resist film. Since the resist film is formed on the semiconductor element substrate W without warping, the boundary of the circuit pattern can be clearly developed. If the boundary of the circuit pattern is not clearly developed, a firm circuit pattern cannot be formed in a later etching process, resulting in a deterioration in the quality of the semiconductor element. For example, in the case of an optical element such as an LED, the boundary cannot be clearly developed, so that the thickness of the semiconductor element becomes non-uniform and the luminance decreases.
- a transparent electrode, a pad electrode, a protective film, etc. are formed on the deposited compound semiconductor. Then, a scribe line is formed with a laser or the like, and cut into a semiconductor element (chip) along the scribe line. Since the thickness of the electrode can be made uniform by correcting the warp, the electric resistance value can be reduced. Thereby, when producing light emitting elements, such as LED, a brightness
- the suction table 20 is moved by the moving mechanism 30 to move the semiconductor element substrate W relative to the fixed nozzle 11.
- the nozzle 11 includes another moving mechanism and the nozzle 11 is moved.
- the semiconductor element substrate W may be moved relative to the nozzle 11 by scanning or by moving the nozzle 11 and the suction table 20 together.
- the semiconductor element substrate W has a region where no semiconductor element is formed in the vicinity of the outer periphery, for example, a region 1 mm from the outermost periphery. Therefore, it is possible to employ a configuration in which the suction portion 21 is provided at least at a position corresponding to the region, for example, in an annular shape, and the semiconductor element substrate W can be sucked and held in the region. According to this, it is possible to prevent the semiconductor element from being damaged by the intrusion of the injection material without providing the purge portion 23.
- the nozzle 11 is disposed so as to be able to spray substantially perpendicularly to the semiconductor element substrate W, but may be disposed in an inclined manner. For example, when the nozzle 11 is tilted to the opposite side to the recovery device 13, the spray material after colliding with the semiconductor element substrate W is directed toward the recovery device 13, so that it can be efficiently sucked and removed.
- the suction type nozzle 11 is used.
- the pressure type direct pressure type in which the injection material is injected after the amount of the injection material in the storage tank is determined by the compressed air supplied to the storage tank of the injection material hopper 12.
- Nozzles can also be applied.
- the shape of the ejection port 11e of the nozzle 11 is not limited to a rectangular shape, and various shapes such as a circular shape can be used.
- the injection process is performed on the entire back surface Wr of the semiconductor element substrate W, when the warp of the semiconductor element substrate W is small, the injection process is performed by performing a fixed point injection on the center of the semiconductor element substrate W or the like. It can also be done.
- Example 2 The result of correcting the warp of the semiconductor element substrate by the warp correction device 1 according to the embodiment will be described as an example.
- three semiconductor element substrates W on which a GaN-based compound semiconductor of about 3 to 5 ⁇ m is formed on a sapphire substrate having a diameter of 4 inches and a thickness of 0.65 ⁇ m are prepared, and the warp described in the embodiment is performed.
- the warp of the semiconductor element substrate W was corrected under the conditions shown in Table 1 using a correction device.
- Table 2 shows the change in warpage for each number of scans. Under any condition, the warpage amount was corrected to 10 ⁇ m or less, and it was found that the warpage of the semiconductor element substrate can be corrected by the warpage correction apparatus 1 according to the embodiment.
- the device components such as the injection mechanism 10 are configured by means having a low device cost, and a predetermined target warpage amount is set. Since the warp correction processing for correcting the warp of the semiconductor element substrate W can be performed by setting appropriate injection processing conditions based on the warp data of the semiconductor element substrate W measured by the measurement mechanism 51, mass production can be performed efficiently.
- the warp of the semiconductor element substrate W can be corrected by a method suitable for the above.
- the warp of the semiconductor element substrate W that has undergone the warp correction process can be measured by the measurement mechanism 51 to determine whether or not the warp correction amount is equal to or less than the target warp amount, the yield can be improved and the warp correction process can be performed. Can be performed efficiently.
- Suction part, 40c Wall part, 41 ... Cleaning mechanism, 51 ... Measuring mechanism, 52 ... Conveyance mechanism, 53 ... Case, 54 ... Control device, W ... Substrate for semiconductor element , Ws ... film formation surface, Wr ... back surface, FA ... injection region of the injection material.
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Abstract
Description
上述した実施形態では、移動機構30により吸着テーブル20を移動させることにより、固定されたノズル11に対し半導体素子用基板Wを相対移動させたが、ノズル11が別の移動機構を備えノズル11を走査させる、または、ノズル11と吸着テーブル20とをともに移動させることにより、ノズル11に対し半導体素子用基板Wを相対移動させてもよい。
実施形態に係る反り矯正装置1によって半導体素子用基板の反りを矯正した結果を実施例として説明する。本実施例では、φ4インチで厚さが0.65μmのサファイア基板上に、3~5μm程度のGaN系化合物半導体を成膜した半導体素子用基板Wを3枚用意し、実施形態に記載の反り矯正装置を用いて、表1の条件にて該半導体素子用基板Wの反りを矯正した。
実施形態に係る半導体素子用基板の反り矯正装置1及び反り矯正方法によれば、噴射機構10など装置構成要素が、装置コストが低い手段から構成されているとともに、あらかじめ設定された目標反り量と測定機構51により測定された半導体素子用基板Wの反りデータとに基づき適切な噴射処理条件を設定して半導体素子用基板Wの反りを矯正する反り矯正処理を行うことができるので、効率良く量産に適した方法で半導体素子用基板Wの反りを矯正することができる。また、反り矯正処理が行われた半導体素子用基板Wの反りを測定機構51により測定し目標反り量以下か否かを判断することができるので、歩留まりを向上させることができるとともに、反り矯正処理を効率的に行うことができる。
Claims (14)
- 半導体素子用基板の反りを矯正する反り矯正装置であって、
前記半導体素子用基板における主面の反対側または成膜面の反対側である裏面へ噴射材を噴射する噴射処理を行うノズルを有する噴射機構と、
前記半導体素子用基板の主面または成膜面を吸着して前記半導体素子用基板を保持する吸着テーブルと、
前記ノズルによる噴射材の噴射領域に対して前記半導体素子用基板が相対移動するように前記吸着テーブルを移動させる移動機構と、
前記吸着テーブルに保持された前記半導体素子用基板を収容し、内部で噴射処理が行われる噴射処理室と、
前記半導体素子用基板の反り量を測定する測定機構と、
あらかじめ設定された目標反り量と前記測定機構により測定された前記半導体素子用基板の反り量との差に基づいて、前記噴射機構の噴射処理条件の設定処理、及び、噴射処理が行われた前記半導体素子用基板の合否判定の少なくとも一方を行う制御装置と、
を備える半導体素子用基板の反り矯正装置。 - 前記吸着テーブルは、
前記半導体素子用基板が載置される領域に設けられ、前記半導体素子用基板を吸着して固定する吸着部と、
前記領域内であって前記吸着部よりも前記領域の外縁側に設けられ、前記半導体素子用基板の外縁と吸着テーブルとの間に形成される隙間から前記領域外に向けて圧縮空気を噴射するパージ部と、
を備える請求項1に記載の半導体素子用基板の反り矯正装置。 - 前記吸着テーブルは、少なくとも前記半導体素子用基板の外縁であって半導体素子が形成されない領域に対応する位置に設けられ、前記半導体素子用基板を吸着して固定する吸着部を備える請求項1に記載の半導体素子用基板の反り矯正装置。
- 前記噴射機構及び前記吸着テーブルの少なくとも一方が、前記半導体素子用基板の前記裏面全面に噴射材が噴射されるように、前記ノズルによる噴射材の噴射領域に対して前記半導体素子用基板を相対的に走査する請求項1~3のいずれか一項に記載の半導体素子用基板の反り矯正装置。
- 前記噴射処理室の一方の側面には、噴射材を吸引して除去する吸引部が設けられ、
前記噴射処理室の他方の側面には、前記半導体素子用基板を保持した前記吸着テーブルを通過させる開口部が形成されており、
前記開口部は、前記半導体素子用基板を保持した前記吸着テーブルを挿入した際に、該吸着テーブルまたは該半導体素子用基板との間で外気を吸引するための空隙を形成する大きさに開口されている請求項1に記載の半導体素子用基板の反り矯正装置。 - 前記噴射処理室の内部は、前記半導体素子用基板の移動を妨げないスリットが形成された壁部で区切られている請求項5に記載の半導体素子用基板の反り矯正装置。
- 前記吸着テーブルは、前記移動機構によって水平面内を移動可能に構成され、
前記壁部は、鉛直方向の両端部が前記噴射処理室の上面及び底部に連結され、かつ、前記ノズルの噴射領域を囲んで配置され、
前記スリットは、前記吸着テーブルの移動可能な水平面内と重なる位置に形成された請求項6に記載の半導体素子用基板の反り矯正装置。 - 前記噴射処理室の開口部側の側面に設けられ、半導体素子用基板に付着した噴射材を除去するためのクリーニング機構を備える請求項5に記載の半導体素子用基板の反り矯正装置。
- 前記制御装置は、前記合否判定において、噴射処理が行われた半導体素子用基板の反りが前記目標反り量より大きいと判断した場合に、再度噴射処理を行うように前記噴射機構を動作させる請求項1に記載の半導体素子用基板の反り矯正装置。
- 前記制御装置は、目標反り量より大きな仮の目標反り量に基づいて噴射処理条件を設定し噴射処理を行う粗矯正処理と、粗矯正処理後に目標反り量に基づいて噴射処理条件を設定し噴射処理を行う仕上げ矯正処理と、を行うように前記噴射機構を動作させる請求項1に記載の半導体素子用基板の反り矯正装置。
- 半導体素子用基板の反り量を測定する測定機構と、あらかじめ設定された目標反り量と前記測定機構により測定された半導体素子用基板の反り量との差に基づいて、噴射機構の噴射処理条件の設定処理、及び、噴射処理が行われた前記半導体素子用基板の合否判定の少なくとも一方を行う制御装置と、半導体素子用基板における主面の反対側または成膜面の反対側である裏面へ噴射する噴射処理を行うノズルを有する噴射機構と、を備える半導体素子用基板の反り矯正装置を用いた半導体素子用基板の反り矯正方法であって、
半導体素子用基板の反り量を前記測定機構で測定する工程と、
前記測定機構で測定された反り量とあらかじめ設定された目標反り量との差に基づいて、前記噴射機構の噴射処理条件を設定する工程と、
前記噴射処理条件で、半導体素子用基板の主面の反対側または成膜面の反対側である裏面より噴射材を噴射して反り矯正処理を行う工程と、
反り矯正処理が行われた半導体素子用基板の反り量が、あらかじめ設定された目標反り量以下か否かを判定する工程と、
を備える半導体素子用基板の反り矯正方法。 - 請求項1に記載の半導体素子用基板の反り矯正装置を用いた半導体素子用基板の反りの矯正方法であって、半導体素子用基板の反り量を前記測定機構で測定する工程と、
反り量が測定された半導体素子用基板を前記吸着テーブル上に搬送し、該半導体素子用基板を該吸着テーブルに保持する工程と、
前記測定機構で測定された反り量とあらかじめ設定された目標反り量との差に基づいて、前記噴射機構の噴射処理条件を設定する工程と、
前記噴射処理条件で、半導体素子用基板の主面の反対側または成膜面の反対側である裏面より噴射材を噴射して反り矯正処理を行う工程と、
反り矯正処理が行われた半導体素子用基板を前記測定機構に搬送し、該半導体素子用基板の反り量を測定する工程と、
反り矯正処理が行われた半導体素子用基板の反り量が、あらかじめ設定された目標反り量以下か否かを判定する工程と、
を備える半導体素子用基板の反り矯正方法。 - 前記半導体素子用基板の反り量は、1の直線に対して3~6点の基準位置からの高さを測定して演算することにより算出される請求項11または請求項12に記載の半導体素子用基板の反り矯正方法。
- 前記反り矯正処理を行う工程は、前記半導体素子用基板上に形成された薄膜層に回路パターンを形成するためのレジスト膜を形成する工程の前に行う請求項11または請求項12に記載の半導体素子用基板の反り矯正方法。
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| US9824894B2 (en) * | 2014-04-09 | 2017-11-21 | Tokyo Electron Limited | Method for correcting wafer bow from overlay |
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| KR102312811B1 (ko) | 2014-05-01 | 2021-10-15 | 신에쯔 한도타이 가부시키가이샤 | 웨이퍼의 휨의 평가방법 및 웨이퍼의 선별방법 |
| KR20160145637A (ko) * | 2014-05-01 | 2016-12-20 | 신에쯔 한도타이 가부시키가이샤 | 웨이퍼의 휨의 평가방법 및 웨이퍼의 선별방법 |
| JP2018041080A (ja) * | 2016-09-05 | 2018-03-15 | 東京エレクトロン株式会社 | 半導体プロセッシング中のオーバレイを制御するための湾曲を制御する応力の位置特定チューニング |
| JP7164289B2 (ja) | 2016-09-05 | 2022-11-01 | 東京エレクトロン株式会社 | 半導体プロセッシング中のオーバレイを制御するための湾曲を制御する応力の位置特定チューニング |
| JP2018190808A (ja) * | 2017-05-01 | 2018-11-29 | 日本特殊陶業株式会社 | セラミック配線基板の製造方法 |
| WO2018211879A1 (ja) * | 2017-05-16 | 2018-11-22 | 新東工業株式会社 | 表面処理加工方法及び表面処理加工装置 |
| US11389930B2 (en) | 2017-05-16 | 2022-07-19 | Sintokogio, Ltd. | Surface treatment processing method and surface treatment processing device |
| WO2019244782A1 (ja) * | 2018-06-22 | 2019-12-26 | 東京エレクトロン株式会社 | 基板処理装置、基板処理方法、及び記憶媒体 |
| JP2020174076A (ja) * | 2019-04-08 | 2020-10-22 | 東京エレクトロン株式会社 | 成膜装置、成膜方法、および成膜システム |
| KR20210091651A (ko) | 2020-01-14 | 2021-07-22 | 신토고교 가부시키가이샤 | 블라스트 가공 장치 및 블라스트 가공 방법 |
| JP2023000134A (ja) * | 2021-06-17 | 2023-01-04 | 株式会社ディスコ | 研削装置 |
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| Publication number | Publication date |
|---|---|
| US9136192B2 (en) | 2015-09-15 |
| CN103503112B (zh) | 2016-08-17 |
| KR20140144128A (ko) | 2014-12-18 |
| KR101830470B1 (ko) | 2018-02-20 |
| CN103503112A (zh) | 2014-01-08 |
| US9230868B2 (en) | 2016-01-05 |
| JP6149728B2 (ja) | 2017-06-21 |
| TWI520248B (zh) | 2016-02-01 |
| US20140287538A1 (en) | 2014-09-25 |
| US20150332978A1 (en) | 2015-11-19 |
| JPWO2013145348A1 (ja) | 2015-12-10 |
| TW201340228A (zh) | 2013-10-01 |
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