WO2011052817A1 - 금속 유기물 화학 기상 증착장치 및 이를 위한 온도제어방법 - Google Patents
금속 유기물 화학 기상 증착장치 및 이를 위한 온도제어방법 Download PDFInfo
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- WO2011052817A1 WO2011052817A1 PCT/KR2009/006260 KR2009006260W WO2011052817A1 WO 2011052817 A1 WO2011052817 A1 WO 2011052817A1 KR 2009006260 W KR2009006260 W KR 2009006260W WO 2011052817 A1 WO2011052817 A1 WO 2011052817A1
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- Prior art keywords
- temperature
- heating zone
- chemical vapor
- vapor deposition
- metal organic
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- 238000000034 method Methods 0.000 title claims abstract description 91
- 238000005229 chemical vapour deposition Methods 0.000 title claims abstract description 54
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 52
- 239000002184 metal Substances 0.000 title claims abstract description 52
- 238000010438 heat treatment Methods 0.000 claims abstract description 162
- 239000000758 substrate Substances 0.000 claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 12
- 239000013212 metal-organic material Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims 1
- 238000000151 deposition Methods 0.000 abstract description 10
- 230000008021 deposition Effects 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract 2
- 239000007921 spray Substances 0.000 abstract 1
- 235000012431 wafers Nutrition 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229910052594 sapphire Inorganic materials 0.000 description 3
- 239000010980 sapphire Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 208000020401 Depressive disease Diseases 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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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
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67248—Temperature monitoring
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/46—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for heating the substrate
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/52—Controlling or regulating the coating process
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41875—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by quality surveillance of production
-
- 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
-
- 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
- H01L21/68771—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 supporting more than one semiconductor substrate
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/45—Nc applications
- G05B2219/45031—Manufacturing semiconductor wafers
Definitions
- the present invention relates to a metal organic chemical vapor deposition apparatus and a temperature control method therefor, and more particularly to a metal organic chemical vapor deposition apparatus and a temperature control for controlling the temperature of the heating zone divided into a plurality of areas It is about a method.
- Nitride materials are best known as materials for manufacturing light emitting devices.
- the stacked structure of a light emitting device using a nitride material generally has a buffer layer made of GaN crystals, an n-type doped layer made of n-type GaN crystals, an active layer made of InGaN, and p-type GaN formed on a substrate such as sapphire. It has a structure in which type doping layers are sequentially stacked. Each layer is in turn stacked in one metal organic chemical vapor deposition chamber.
- the temperature uniformity over the entire area of the susceptor has a significant effect on process efficiency.
- the temperature for forming the n-type doping layer is 1200 ° C
- the temperature for forming the active layer is 700 ° C to 900 ° C.
- the process temperature may be repeatedly changed at 700 ° C and 900 ° C.
- the temperature control is the most important technology to effectively perform the process and to obtain a high quality light emitting device. As the temperature control is effectively performed, a high efficiency light emitting device can be obtained. Accordingly, the present invention is to more effectively control the temperature of the metal organic chemical vapor deposition apparatus.
- An object of the present invention is to provide a metal organic chemical vapor deposition apparatus and a temperature control method therefor for allowing the temperature of the susceptor to be effectively controlled for each epitaxial process in the metal organic chemical vapor deposition apparatus.
- Metal organic chemical vapor deposition apparatus according to the present invention and a temperature control method therefor to effectively control the temperature conditions required for each epitaxial process in the metal organic chemical vapor deposition apparatus performing the process while changing the temperature from room temperature to 1200 degrees Celsius
- the temperature ramping required during the process is evenly applied to the entire substrates, thereby improving the deposition uniformity and the process efficiency.
- FIG. 1 is a view showing an embodiment of a metal organic chemical vapor deposition apparatus.
- FIG. 2 is a diagram showing a first embodiment of a temperature control configuration of a metal organic chemical vapor deposition apparatus.
- FIG. 3 is a flowchart illustrating a first control method using a temperature control configuration of a metal organic chemical vapor deposition apparatus according to the embodiment of FIG. 2.
- FIG. 4 is a flowchart illustrating a second control method using the temperature control configuration of the metal organic chemical vapor deposition apparatus according to the embodiment of FIG. 2.
- 5 is a graph exemplarily showing temperature ramping tendency in each temperature control region.
- FIG. 6 is a view showing a second embodiment of the temperature control configuration of the metal organic chemical vapor deposition apparatus.
- FIG. 7 is a flowchart illustrating a control method using a temperature control configuration of a metal organic chemical vapor deposition apparatus according to the embodiment of FIG. 6.
- Metal organic chemical vapor deposition apparatus comprises a chamber; A susceptor rotatably installed in the chamber and having at least one substrate seated thereon; A plurality of heaters for heating the susceptor and independently controlling a temperature; A gas injector positioned above the susceptor to inject group 3 and group 5 gases to the susceptor; A plurality of temperature sensors positioned at one side of the susceptor and measuring a temperature of a heating area heated by the respective heaters; And a control unit which holds a temperature setting value required for the heating zone, and controls the temperature of the heating zone by comparing the detected temperature value detected by each temperature sensing sensor with a setting value required for the heating zone.
- Each of the heating zones includes an individual heater that is individually controlled, and the temperature control unit includes an individual control unit that controls the respective heaters, and each of the individual power sources that independently supplies power to each of the heaters.
- the supply can be connected.
- the temperature control unit includes an individual control unit for controlling the respective heating zones, and maintains the temperature setting value of any one of the heating zones as a representative temperature setting value, and stores the representative temperature setting value. It can be used to control the temperature of each heating zone.
- the temperature control unit controls the temperature of the representative heating zone selected from the heating zone with the representative temperature setting value, and uses the detected temperature value detected by the temperature sensor for sensing the temperature of the representative heating zone among the temperature sensors.
- the temperature of the heating zone can be controlled except for the representative heating zone.
- the temperature control unit measures a temperature ramping tendency sensed in the representative heating zone, and the temperature ramping tendency to follow the temperature ramping tendency of the representative heating zone except for the representative heating zone. Can be controlled.
- the temperature ramping tendency may be a temperature ramping rate of the representative heating zone.
- the temperature control unit may hold individual temperature setting values required for the respective heating zones, and control the temperature of each heating zone by using the individual temperature setting values.
- the temperature controller may measure a temperature ramping tendency detected in each heating zone, and control the heating zone to match the temperature ramping tendency.
- the temperature ramping tendency may be the temperature ramping rate of the respective heating zones.
- the temperature ramping tendency may be a temperature deviation with respect to the temperature setting of each heating zone.
- the temperature controller obtains an average value of the temperatures detected while the susceptor rotates a predetermined number of times, and compares the average value with the temperature setting value to control the temperature of each heating zone.
- the temperature of the heating zone obtained by sensing by the temperature sensor may be a temperature for the susceptor.
- the temperature of the heating region obtained by sensing by the temperature sensor may be a temperature of the substrate.
- the temperature of the heating region obtained by sensing by the temperature sensor may be a temperature of the susceptor and the substrate.
- a temperature control method for a metal organic chemical vapor deposition apparatus is a method for controlling the temperature of a plurality of heating zones in a metal organic chemical vapor deposition apparatus, the temperature of each heating zone is sensed by a temperature sensor
- the temperature control unit having the temperature setting value required for the heating zone compares the temperature value detected by the temperature sensor with the temperature setting value, and controls the heating zone to the temperature setting value.
- Each of the heating zones includes an individual heater that is individually controlled, and the temperature control unit includes an individual control unit that controls the respective heaters, and each of the individual power sources that independently supplies power to each of the heaters.
- the supply can be connected.
- the temperature control unit includes an individual control unit for controlling the respective heating zones, and maintains the temperature setting value of any one of the heating zones as a representative temperature setting value, and stores the representative temperature setting value. It can be used to control the temperature of each heating zone.
- the temperature control unit controls the temperature of the representative heating zone selected from the heating zone with the representative temperature setting value, and uses the detected temperature value detected by the temperature sensor for sensing the temperature of the representative heating zone among the temperature sensors.
- the temperature of the heating zone can be controlled except for the representative heating zone.
- the temperature controller may measure the temperature ramping tendency detected in the representative heating zone, and control the temperature ramping tendency to follow the temperature ramping tendency of the representative heating zone except for the representative heating zone.
- the temperature ramping tendency may be a temperature ramping rate per unit time of the representative heating zone.
- the temperature control unit may hold individual temperature setting values required for the respective heating zones, and control the temperature of each heating zone by using the individual temperature setting values.
- the temperature control unit may measure the temperature ramping tendency sensed in the respective heating zones, and control each of the heating zones to match the temperature ramping tendency.
- the temperature ramping tendency may be the temperature ramping rate of the respective heating zones.
- the temperature ramping tendency may be a temperature deviation with respect to the temperature setting of each heating zone.
- the temperature controller obtains an average value of the temperatures detected while the susceptor rotates a predetermined number of times, and compares the average value with the temperature setting value to control the temperature of each heating zone.
- the temperature of the heating zone obtained by sensing by the temperature sensor may be a temperature for the susceptor.
- the temperature of the heating region obtained by sensing by the temperature sensor may be a temperature of the substrate.
- the temperature of the heating region obtained by sensing by the temperature sensor may be a temperature of the susceptor and the substrate.
- FIG. 1 is a view showing a first embodiment of a metal organic chemical vapor deposition apparatus
- the metal organic chemical vapor deposition apparatus includes a reaction chamber 100 and a gas injector 101 for injecting a process gas downward from an upper portion of the reaction chamber 100.
- the gas injection unit 101 may be implemented with a shower head or a nozzle for injecting Group 3 and Group 5 gases.
- the gas injection unit is provided with a plurality of view points 101a (view points) opened downward so that the temperature sensors described below can sense the temperature.
- At least one susceptor 102 on which a substrate 103, such as at least one sapphire substrate 103, is seated, is installed below the gas injection unit 101.
- the substrate 103 may be a satellite susceptor in which at least one or more substrates 103 are seated and detached from the susceptor 102 to be taken out to the outside.
- the satellite susceptor can be configured to revolve and rotate about the rotation axis 104 of the susceptor 102 by the rotation of the susceptor 102, and can also rotate by its own rotation.
- a motor 105 is installed below the susceptor 102, and the center of the susceptor 102 is coupled to the rotation shaft 104 of the motor 105.
- it may be configured to rotate the satellite susceptor by air pressure or mechanical operation.
- a plurality of heaters 200, 201, 202 and 203 for heating the susceptor 102 at a high temperature are installed below the susceptor 102.
- a tungsten heater, a ceramic heater or an RF heater may be used as the heater.
- the heater includes a first heater 200, a second heater 201, a third heater 202, and a fourth heater 203.
- the first heater 200 heats the vicinity of the innermost part of the susceptor 102.
- the region in which the first heater 200 heats is referred to as a first heating region.
- the second heater 201, the third heater 202, and the fourth heater 203 are sequentially positioned outside the first heater 200, and regions corresponding to these heaters are sequentially in the second heating region and the third heater. It is divided into a heating zone and a fourth heating zone.
- the first temperature sensor 240 for sensing the temperature of the first heating zone heated by the first heater 200 and the second temperature sensor 241 and the third heating for sensing the temperature of the second heating zone
- Each heating area sensed by each of the sensors 240, 241, 242 and 243 may be the susceptor 102 position, or may be the temperature of the substrate 103, that is, the wafer, Alternatively, the temperature may be a temperature for sensing the temperature of the wafer and the substrate 103 obtained while the susceptor 102 rotates.
- each temperature sensor may be located at the bottom of the susceptor 102, the temperature sensor at this time may be carried out by a thermo couple (pyrometer) or a pyrometer (pyrometer), When using a pyrometer, a viewpoint may be formed on a lower side of a heater such as an RF heater.
- FIG. 2 is a diagram showing a first embodiment of a temperature control configuration of a metal organic chemical vapor deposition apparatus.
- a separate power source and a separate control unit are connected to each heater.
- a first power source 210 for supplying power to the first heater 200 is connected to the first heater 200, and the first power source 210 controls the first power source 210.
- One controller 220 is provided.
- a second power source 211 for supplying power to the second heater 201 is connected to the second heater 201, and the second power source 211 controls the second power source 211.
- Two separate controllers 221 are provided.
- a third power source 212 for supplying power to the third heater 202 is connected to the third heater 202, and the third power source 212 controls the third power source 212.
- a fourth power source 213 for supplying power to the fourth heater 203 is connected to the fourth heater 203, and the fourth power source 213 is configured to control the fourth power source 213.
- Four separate control unit 223 is provided.
- the main controller 230 for controlling the first, second, third, and fourth controllers 220, 221, 222, and 223 is provided together.
- Each of the individual controllers 220, 221, 222, and 223 obtains an average value of the sensed temperature while the susceptor 102 rotates one or more revolutions a predetermined number of times, and recognizes the average value as the sensed temperature value. Can be. That is, the temperature control for each heating zone can be performed by comparing the temperature average value and the temperature setting value.
- FIG. 3 is a flowchart illustrating a first control method using a temperature control configuration of a metal organic chemical vapor deposition apparatus according to the embodiment of FIG. 2.
- the same first step temperature setting values may be assigned to the first, second, third, and fourth individual controllers 220, 221, 222, and 223 (S10).
- This temperature setting may be the desired ramping temperature in each zone.
- the setting of the ramping temperature to the same temperature setting value (or setting point) is to keep the temperature of the entire susceptor 102 the same so that the deposition of the metal organic material can be made uniform on all the substrates 103.
- the target temperature is set to 1,200 degrees Celsius, which is a temperature for thermally cleaning the substrate 103 in the first hydrogen atmosphere on the substrate 103 in an epitaxial process for manufacturing an LED light emitting device
- the target temperature is sensed.
- the temperature value detected by the sensor can be the temperature setting value.
- the first, second, third, and fourth individual controllers 220, 221, 222, and 223 are the same. Applies the same temperature setting to the first, second, third, and fourth power sources 210, 211, 212, 213. Accordingly, the first, second, third, and fourth heaters 200, 201, 202, and 203 start heating to heat the susceptor 102 to the same temperature setting value (S11). At this time, the susceptor 102 rotates at a predetermined rotation speed.
- the temperature for the susceptor 102 is the first, second, third, fourth temperature sensor (240, 241, 242, 243) by detecting the temperature of each of the respective areas, each individual control unit 220 (221) 222, 223 transmits the sensed temperature value (S12).
- each heater 200, 201, 202, 203 maintains the corresponding temperature within an error range of the preset first stage temperature setting value.
- the margin of error can be within approximately 3% of the setting temperature.
- the first temperature sensors 240, 241, 242, and 243 provide a temperature ramping tendency (temperature tendency to rise or temperature tendency to fall) in the first heating zone while ramping the temperature to the first stage temperature setting value. Analyze and determine (S13).
- the temperature ramping tendency may be a temperature value relative to the temperature ramping time, that is, a rate of temperature rise or temperature fall.
- This temperature ramping tendency is related to deposition uniformity and deposition quality for wafers in epitaxial processes. If the regions have different temperature ramping tendencies, the deposition quality is poor, making it difficult to obtain high quality epitaxial process results. Therefore, improvement of epitaxial quality can be expected by keeping the temperature ramping tendency in each region the same or as similar as possible. Control of the temperature ramping tendency will be described in more detail in the description of FIG. 5.
- Temperature ramping is performed while the temperature ramping tendency is equally or very similar to the first, second, third, and fourth heating zones (S14), and the temperature of the first, second, third, and fourth heating zones is continuously set.
- the value reaches the desired epitaxial process is performed (S15).
- the temperature setting value is input to a value different from the one-step temperature setting value (S17).
- the second temperature setting value (1 + n step, n is a natural number
- the first, second, third and fourth individual controllers 220, 221, 222, 223 each pass through their respective power sources 210, 211, 212, 213.
- Heat ramping is performed to the heaters 200, 201, 202, and 203 with the temperature setting values of the next step. Again, the temperature ramping tendency is maintained.
- the setting of temperatures for a plurality of different temperature setting values may be applied to a case for performing epitaxial processes having a plurality of different conditions in one reaction chamber 100.
- various modifications may be applied according to process operating conditions of the corresponding reaction chamber 100.
- different intrinsic temperature setting values may be input to each heater 200, 201, 202, 203 to perform temperature ramping.
- it is performed when too large an area is difficult to control the temperature with the same temperature setting value, or the goal of the process is uniformity of epitaxial.
- the temperature ramping value is different for each region, the process efficiency is improved, and another example is when more active temperature ramping control is required, such as when a different process is required for each position on the susceptor 102. Can be performed.
- FIG. 4 is a flowchart illustrating a second control method using the temperature control configuration of the metal organic chemical vapor deposition apparatus according to the embodiment of FIG. 2.
- the main controller 230 assigns a unique temperature setting value to each of the first, second, three, and four separate controllers 220, 221, 222, and 223 (S20).
- This intrinsic temperature setting can be the desired ramping temperature independently in each zone.
- the first, second, third, and fourth controllers 220, 221, 222, and 223 are each of the first. Apply a unique temperature setting to each of the 2, 3, 4 power sources 210, 211, 212 and 213. Accordingly, the first, second, third, and fourth heaters 200, 201, 202, and 203 start heating to heat the susceptor 102 to the intrinsic temperature setting values (S21). At this time, the susceptor 102 rotates at a predetermined rotation speed.
- the first, second, third, and fourth temperature sensors 240, 241, 242, and 243 sense the temperature of each corresponding region, and each individual control unit 220,221,222,222. Transfer to (S22).
- each heater 200, 201, 202, 203 maintains the temperature within the error range of the preset intrinsic temperature setting value.
- the margin of error can be within approximately 3% of the setting temperature.
- the first temperature sensor 240 determines the temperature ramping tendency (temperature tendency to rise or temperature tendency to fall) of the first heating region.
- the nature of the temperature ramping tendency is the same as that of the first method already mentioned.
- the temperature setting value is input as the second new unique temperature setting value different from the first unique temperature setting value. (S27). Accordingly, the first, second, third, and fourth control units 220, 221, 222, and 223 pass through the respective power sources to the respective heaters 200, 201, 202, and 203 of the next step. The temperature ramping is carried out with the intrinsic temperature setting, and the temperature ramping tendency is likewise maintained.
- FIG. 5 is a graph illustrating temperature ramping tendency in each temperature control region.
- a process of maintaining the temperature ramping tendency in each heater or region will be described using an epitaxial process of the LED light emitting device as an example.
- a plurality of substrates 103 are mounted on the susceptor 102 inside the reaction chamber 100 in order to proceed with the epitaxial process. And inside the reaction chamber 100 is cut off from the outside, and prepares for the start of the process.
- each of the first, second, third and fourth temperature sensors 240, 241, 242 and 243 measures the temperature of the corresponding area, and the result of the measurement is measured for each individual controller.
- the first process is a cleaning process for cleaning the substrate 103 by heat treatment.
- the temperature setting value is set to a temperature setting value of 1000 degrees Celsius to 1200 degrees Celsius, which is a set temperature, and the inside of the reaction chamber 100 becomes a hydrogen atmosphere.
- the main control unit 230 transmits the same temperature setting value to each of the first, second, third, and fourth control units 220, 221, 222, and 223.
- a unique temperature setting value is transmitted to each individual control unit 220, 221, 222, 223.
- the temperature required for the heat treatment process is within the range of 1,000 degrees Celsius to 1,200 degrees Celsius.
- each heater performs temperature ramping using the temperature setting value.
- the temperature ramping condition is to increase the temperature to a temperature setting value.
- the temperature ramping tendency in the first heating region that is, the temperature increase rate is measured. That is, the temperature increase rate is measured as the temperature for the required time, and then the temperature increase rates in the second, third, and fourth regions, respectively, are compared.
- the heating rate of these different regions may be controlled by the respective individual controllers 220, 221 and 203 that control the respective heaters 200, 201, 202, and 203. 222) and 223 to control and control the temperature increase rate as uniformly as possible in each area.
- the substrate 103 is heated and heat-treated for 10 to 20 minutes at the temperature of the corresponding temperature setting value.
- This heat treatment step is a cleaning step for removing a foreign material layer such as an oxide film on the substrate 103.
- the reaction chamber 100 is a hydrogen gas atmosphere.
- the GaN buffer layer deposition process is a process of depositing a GaN layer having a thickness of about 100 nm at 450 degrees Celsius to 600 degrees Celsius. Therefore, to this end, the temperature of each of the elevated region for the heat treatment process should be reduced to 450 degrees Celsius ⁇ 600 degrees. That is, the temperature at this time becomes the second temperature setting value.
- each individual control unit 220, 221. 222, 223 instructs the first, second, third, and fourth heaters 200, 201, 202, 203 to reduce the temperature to the second temperature setting value, and the respective depressed states
- the first, second, third, and fourth temperature sensors 240, 241, 242, and 243 detect and continuously control the first, second, third, and fourth individual controllers 220, 221, 222, and 223, respectively. To pass).
- the main controller 230 determines the temperature ramping tendency received from the first individual controller 220 and controls the operation of the second, third, and fourth heaters 201, 202, and 203 by using the tendency. Ensure that the temperature reductions in the 2, 3 and 4 regions have the same temperature ramping tendency.
- an undoped GaN layer is deposited next.
- the undoped GaN layer is about 60 minutes at 1000 to 1100 degrees Celsius.
- the temperature increase is performed while maintaining the same temperature ramping tendency in each region.
- the process of depositing the active layer and the p-GaN layer, respectively is performed while the temperature ramping is continued, and the temperature ramping tendency of each region is maintained to be the same each time.
- the temperature ramping tendency of each layer remains the same, the crystal growth quality of the layers deposited by the epitaxial process is very uniform for each substrate 103 of the susceptor 102, and thus, the effect of good deposition is obtained. .
- the temperature ramping tendency may be a temperature deviation with respect to a temperature ramping rate or a temperature setting value that is a temperature rising rate or a temperature decreasing rate. Equally or similarly controlling these temperature ramping rates and temperature variations allows for more efficient epitaxial processes.
- the temperature control configuration may be modified differently.
- 6 is a view showing a second embodiment of the temperature control configuration of the metal organic chemical vapor deposition apparatus
- Figure 7 is a control method using the temperature control configuration of the metal organic chemical vapor deposition apparatus according to the embodiment of FIG. This is a flowchart for explanation.
- the temperature control configuration includes a first power source for supplying power to the first heater 200 in the temperature control configuration of the metal organic chemical vapor deposition apparatus.
- 210 is connected, and the first power source 210 is provided with a first individual control unit 220 for controlling the first power source 210.
- a second power source 211 for supplying power to the second heater 201 is connected to the second heater 201, and the second power source 211 controls the second power source 211.
- Two separate controllers 221 are provided.
- a third power source 212 for supplying power to the third heater 202 is connected to the third heater 202, and the third power source 212 controls the third power source 212.
- Three separate controllers 222 are provided.
- a fourth power source 213 for supplying power to the fourth heater 203 is connected to the fourth heater 203, and the fourth power source 213 is configured to control the fourth power source 213.
- Four separate control unit 223 is provided.
- a main controller 230 for controlling the first individual controller 220 is provided.
- the main controller 230 is connected to the first individual controller 220 to provide a temperature setting value only to the first individual controller 220. That is, the representative temperature setting value is provided to the first individual control unit 220, and no other temperature setting value is provided to the other individual control units 221, 222, and 223.
- Each of the individual controllers 220, 221, 222, and 223 obtains an average value of the sensed temperature while the susceptor 102 rotates one or more revolutions a predetermined number of times, and recognizes the average value as the sensed temperature value. Can be. Meanwhile, temperature control may be performed by using a temperature average value at this time and a sensed temperature value of a specific position.
- the temperature sensed by each of the temperature sensors 240, 241, 242, and 243 may be the temperature of the susceptor 102, or may be the temperature of the substrate 103, that is, the wafer. It may be a temperature for sensing the temperature of the wafer and the substrate 103 obtained while the susceptor 102 rotates.
- FIG. 7 is a flowchart illustrating a first control method using a temperature control configuration of a metal organic chemical vapor deposition apparatus according to the embodiment of FIG. 6.
- a representative temperature setting value which is a first step temperature setting value, may be assigned to the first individual controller 220 (S30).
- This representative temperature setting may be the desired ramping temperature in each region.
- the first stage representative temperature setting value is assigned to the first individual controller 220, and when the first temperature sensors 240, 241, 242, and 243 detect the temperature of the first heating region, the detected temperature is detected.
- the temperature value is transmitted to the first individual controller 220 (S31).
- the first heating zone becomes a representative heating zone.
- the first individual controller 220 transmits the temperature of the first heating region to the second, third, and fourth individual controllers 221, 222, and 223, and accordingly, the second, third, and fourth individual controllers 221. 222 and 223 start heating by receiving the sensed temperature of the first heating region (S32). At this time, the susceptor 102 rotates at a predetermined rotation speed.
- the first temperature sensor 240 is determined by analyzing the temperature ramping tendency (temperature rising tendency or temperature tendency of falling) of the first heating region (S33). Then, the second, third and fourth heaters 201, 202 and 203 are controlled to match each temperature tendency (S34).
- the epitaxial process for which the temperature of the first, second, third, and fourth heating zones is desired is performed while the temperature ramping tendency is equally or very similar to the first, second, third, and fourth heating zones (S35). .
- the first individual controller 220 determines that the temperature is ramped to the first stage representative temperature setting value
- the first individual controller 220 controls the first heater 200 to maintain the ramped temperature.
- the three and four individual controllers 221, 222, and 223 are sensed by the first temperature sensors 240, 241, 242, and 243 in real time and reported to the temperature values reported to the first controller 220.
- the heaters 200, 201, 202, and 203 are controlled, the temperature of the remaining heating zones is controlled within the error range in the same or similar manner as the temperature of the first heating zone (S33). (S34).
- the second, third, and fourth heaters 201, 202, 203 are controlled to follow the temperature of the first heating zone in the second embodiment, the first, second, third, and fourth heaters 220, 221 are controlled.
- the temperature ramping tendency of 222 and 223 can be maintained equally or similarly timed automatically without additional control.
- the second, third, and fourth heaters 201, 202, and 203 follow the ramping condition of the first heater 200, the temperature ramping tendency and the temperature uniformity may be ensured even when the next process is performed. .
- the temperature uniformity of the first heating region provided to the second, third, and fourth individual controllers 221, 222, and 223 in the first individual controller 220 is continuously provided at a short time interval if possible. And temperature ramping tendency can be controlled more precisely.
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Abstract
Description
Claims (28)
- 챔버;상기 챔버 내부에 회전 가능하게 설치되며 적어도 하나 이상의 기판이 안착되는 서셉터;상기 서셉터를 가열하며 독립적으로 온도가 제어되는 복수개의 히터;상기 서셉터 상부에 위치하여 상기 서셉터 측으로 3족과 5족 가스를 분사하는 가스 분사부;상기 서셉터의 일측에 위치하며 상기 각각의 히터에 의하여 가열되는 가열영역의 온도를 측정하는 복수개의 온도 감지센서;상기 가열영역에 요구되는 온도 셋팅값을 보유하고, 상기 각각의 온도 감지센서에서 감지한 상기 감지 온도값과 상기 가열영역에 요구되는 셋팅값을 비교하여 상기 가열영역의 온도를 제어하는 제어부를 구비하는 것을 특징으로 하는 금속 유기물 화학기상 증착장치.
- 제 1항에 있어서, 상기 각각의 가열영역은 개별 제어되는 개별 히터를 포함하고, 상기 온도 제어부는 상기 각각의 히터를 제어하는 개별 제어부를 포함하고, 상기 각각의 히터에는 상기 각각의 히터에 독립적으로 전원을 공급하는 개별 전원 공급부가 연결되는 것을 특징으로 하는 금속 유기물 화학기상 증착장치.
- 제 1항에 있어서, 상기 온도 제어부는 상기 각각의 가열영역을 제어하는 개별 제어부를 포함하고, 상기 각각의 가열영역중 어느 하나의 상기 가열영역에 대한 온도 셋팅값을 대표 온도 셋팅값으로 보유하고, 상기 대표 온도 셋팅값을 이용하여 상기 각각의 가열영역의 온도를 제어하는 것을 특징으로 하는 금속 유기물 화학기상 증착장치.
- 제 3항에 있어서, 상기 온도 제어부는 상기 대표 온도 셋팅값으로 상기 가열영역중에서 선택된 대표 가열영역의 온도를 제어하고, 상기 온도 감지센서중 상기 대표 가열영역의 온도를 감지하는 온도 감지센서에서 감지한 상기 감지 온도값을 이용하여 상기 대표 가열영역을 제외한 나머지 상기 가열영역의 온도를 제어하는 것을 특징으로 하는 금속 유기물 화학기상 증착장치.
- 제 4항에 있어서, 상기 온도 제어부는 상기 대표 가열영역에서 감지되는 온도 램핑 경향성(temperature ramping tendency)을 측정하고, 상기 온도 램핑 경향성을 상기 대표 가열영역을 제외한 나머지 상기 가열영역이 상기 대표 가열영역의 온도 램핑 경향성을 따르도록 제어하는 것을 특징으로 하는 금속 유기물 화학기상 증착장치.
- 제 4항에 있어서, 상기 온도 램핑 경향성은 상기 대표 가열영역의 온도 램핑 속도인 것을 특징으로 하는 금속 유기물 화학기상 증착장치.
- 제 1항에 있어서, 상기 온도 제어부는 상기 각각의 가열영역에 요구되는 개별 온도 셋팅값을 보유하고, 상기 개별 온도 셋팅값을 이용하여 상기 각각의 가열영역의 온도를 제어하는 것을 특징으로 하는 금속 유기물 화학기상 증착장치.
- 제 7항에 있어서, 상기 온도 제어부는 상기 각각의 가열영역에서 감지되는 온도 램핑 경향성을 측정하고, 상기 각각의 가열영역이 상기 온도 램핑 경향성을 맞추도록 제어하는 것을 특징으로 하는 금속 유기물 화학기상 증착장치.
- 제 8항에 있어서, 상기 온도 램핑 경향성은 상기 각각의 가열영역의 온도 램핑 속도인 것을 특징으로 하는 금속 유기물 화학기상 증착장치.
- 제 8항에 있어서, 상기 온도 램핑 경향성은 상기 각각의 가열영역의 상기 온도 셋팅값에 대한 온도편차인 것을 특징으로 하는 금속 유기물 화학기상 증착장치.
- 제 1항에 있어서, 상기 온도 제어부는 상기 서셉터가 소정 횟수 회전하는 동안에 감지된 온도의 평균값을 구하고, 상기 평균값과 상기 온도 셋팅값을 비교하여 상기 각각의 가열영역의 온도를 제어하는 것을 특징으로 하는 금속 유기물 화학기상 증착장치.
- 제 11항에 있어서, 상기 온도 감지센서에서 감지하여 얻는 상기 가열영역의 온도는 상기 서셉터에 대한 온도인 것을 특징으로 하는 금속 유기물 화학기상 증착장치.
- 제 11항에 있어서, 상기 온도 감지센서에서 감지하여 얻는 상기 가열영역의 온도는 상기 기판에 대한 온도인 것을 특징으로 하는 금속 유기물 화학기상 증착장치.
- 제 11항에 있어서, 상기 온도 감지센서에서 감지하여 얻는 상기 가열영역의 온도는 상기 서셉터와 상기 기판에 대한 온도인 것을 특징으로 하는 금속 유기물 화학기상 증착장치.
- 금속 유기물 화학기상 증장장치에서 복수개의 가열영역의 온도를 제어하기 위한 방법에 있어서,상기 각각의 가열영역의 온도를 온도 감지센서로 감지하고, 상기 가열영역에 요구되는 온도 셋팅값을 보유한 온도제어부에서 상기 온도 감지센서에서 감지한 온도값과 상기 온도 셋팅값을 비교하여 상기 가열영역을 상기 온도 셋팅값으로 제어하는 것을 특징으로 하는 금속 유기물 화학기상 증착장치를 위한 온도 제어방법.
- 제 15항에 있어서, 상기 각각의 가열영역은 개별 제어되는 개별 히터를 포함하고, 상기 온도 제어부는 상기 각각의 히터를 제어하는 개별 제어부를 포함하고, 상기 각각의 히터에는 상기 각각의 히터에 독립적으로 전원을 공급하는 개별 전원 공급부가 연결되는 것을 특징으로 하는 금속 유기물 화학기상 증착장치를 위한 온도 제어방법.
- 제 15항에 있어서, 상기 온도 제어부는 상기 각각의 가열영역을 제어하는 개별 제어부를 포함하고, 상기 각각의 가열영역중 어느 하나의 상기 가열영역에 대한 온도 셋팅값을 대표 온도 셋팅값으로 보유하고, 상기 대표 온도 셋팅값을 이용하여 상기 각각의 가열영역의 온도를 제어하는 것을 특징으로 하는 금속 유기물 화학기상 증착장치를 위한 온도 제어방법.
- 제 17항에 있어서, 상기 온도 제어부는 상기 대표 온도 셋팅값으로 상기 가열영역중에서 선택된 대표 가열영역의 온도를 제어하고, 상기 온도 감지센서중 상기 대표 가열영역의 온도를 감지하는 온도 감지센서에서 감지한 상기 감지 온도값을 이용하여 상기 대표 가열영역을 제외한 나머지 상기 가열영역의 온도를 제어하는 것을 특징으로 하는 금속 유기물 화학기상 증착장치를 위한 온도 제어방법.
- 제 17항에 있어서, 상기 온도 제어부는 상기 대표 가열영역에서 감지되는 온도 램핑 경향성을 측정하고, 상기 온도 램핑 경향성을 상기 대표 가열영역을 제외한 나머지 상기 가열영역이 상기 대표 가열영역의 온도 램핑 경향성을 따르도록 제어하는 것을 특징으로 하는 금속 유기물 화학기상 증착장치를 위한 온도 제어방법.
- 제 19항에 있어서, 상기 램핑 경향성은 상기 대표 가열영역의 단위시간당 온도 변화 기울기인 것을 특징으로 하는 금속 유기물 화학기상 증착장치를 위한 온도 제어방법.
- 제 15항에 있어서, 상기 온도 제어부는 상기 각각의 가열영역에 요구되는 개별 온도 셋팅값을 보유하고, 상기 개별 온도 셋팅값을 이용하여 상기 각각의 가열영역의 온도를 제어하는 것을 특징으로 하는 금속 유기물 화학기상 증착장치를 위한 온도 제어방법.
- 제 21항에 있어서, 상기 온도 제어부는 상기 각각의 가열영역에서 감지되는 온도 램핑 경향성을 측정하고, 상기 각각의 가열영역이 상기 온도 램핑 경향성을 맞추도록 제어하는 것을 특징으로 하는 금속 유기물 화학기상 증착장치를 위한 온도 제어방법.
- 제 22항에 있어서, 상기 온도 램핑 경향성은 상기 각각의 가열영역의 단위시간당 온도 변화 기울기인 것을 특징으로 하는 금속 유기물 화학기상 증착장치를 위한 온도 제어방법.
- 제 22항에 있어서, 상기 온도 램핑 경향성은 상기 각각의 가열영역의 상기 온도 셋팅값에 대한 온도편차인 것을 특징으로 하는 금속 유기물 화학기상 증착장치를 위한 온도 제어방법.
- 제 15항에 있어서, 상기 온도 제어부는 상기 서셉터가 소정 횟수 회전하는 동안에 감지된 온도의 평균값을 구하고, 상기 평균값과 상기 온도 셋팅값을 비교하여 상기 각각의 가열영역의 온도를 제어하는 것을 특징으로 하는 금속 유기물 화학기상 증착장치를 위한 온도 제어방법.
- 제 25항에 있어서, 상기 온도 감지센서에서 감지하여 얻는 상기 가열영역의 온도는 상기 서셉터에 대한 온도인 것을 특징으로 하는 금속 유기물 화학기상 증착장치를 위한 온도 제어방법.
- 제 25항에 있어서, 상기 온도 감지센서에서 감지하여 얻는 상기 가열영역의 온도는 상기 기판에 대한 온도인 것을 특징으로 하는 금속 유기물 화학기상 증착장치를 위한 온도 제어방법.
- 제 25항에 있어서, 상기 온도 감지센서에서 감지하여 얻는 상기 가열영역의 온도는 상기 서셉터와 상기 기판에 대한 온도인 것을 특징으로 하는 금속 유기물 화학기상 증착장치를 위한 온도 제어방법.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/KR2009/006260 WO2011052817A1 (ko) | 2009-10-28 | 2009-10-28 | 금속 유기물 화학 기상 증착장치 및 이를 위한 온도제어방법 |
EP09850888.0A EP2495755A4 (en) | 2009-10-28 | 2009-10-28 | DEVICE FOR CHEMICAL VAPOR DEPOSITION BY ORGANOMETALLIC COMPOUNDS AND METHOD OF CONTROLLING TEMPERATURE THEREFOR |
KR1020147010752A KR101530642B1 (ko) | 2009-10-28 | 2009-10-28 | 금속 유기물 화학 기상 증착장치 및 이를 위한 온도제어방법 |
US13/503,787 US9165808B2 (en) | 2009-10-28 | 2009-10-28 | Metal organic chemical vapor deposition device and temperature control method therefor |
CN200980162274.8A CN102598217B (zh) | 2009-10-28 | 2009-10-28 | 金属有机化学汽相淀积设备及其温度控制方法 |
KR1020127009948A KR101431782B1 (ko) | 2009-10-28 | 2009-10-28 | 금속 유기물 화학 기상 증착장치 및 이를 위한 온도제어방법 |
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EP (1) | EP2495755A4 (ko) |
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- 2009-10-28 CN CN200980162274.8A patent/CN102598217B/zh not_active Expired - Fee Related
- 2009-10-28 US US13/503,787 patent/US9165808B2/en not_active Expired - Fee Related
- 2009-10-28 EP EP09850888.0A patent/EP2495755A4/en not_active Withdrawn
- 2009-10-28 KR KR1020147010752A patent/KR101530642B1/ko active IP Right Grant
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Also Published As
Publication number | Publication date |
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KR101431782B1 (ko) | 2014-08-20 |
KR101530642B1 (ko) | 2015-06-22 |
EP2495755A1 (en) | 2012-09-05 |
EP2495755A4 (en) | 2013-11-06 |
US9165808B2 (en) | 2015-10-20 |
US20120221138A1 (en) | 2012-08-30 |
CN102598217A (zh) | 2012-07-18 |
KR20140057680A (ko) | 2014-05-13 |
CN102598217B (zh) | 2015-03-25 |
KR20120062900A (ko) | 2012-06-14 |
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