Source: http://www.google.com/patents/US20110143016?dq=5579430
Timestamp: 2016-08-29 10:02:05
Document Index: 554288808

Matched Legal Cases: ['art 30', 'art 71', 'art 72', 'art 73', 'art 74', 'art 30', 'art 30', 'art 71', 'art 71']

Patent US20110143016 - Temperature control method for chemical vapor deposition apparatus - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsProvided is a method in which a difference between a surface temperature of a susceptor and a surface temperature of a substrate is accurately grasped without using a complicated high-priced equipment. A temperature control method for a chemical vapor deposition apparatus includes detecting a rotation...http://www.google.com/patents/US20110143016?utm_source=gb-gplus-sharePatent US20110143016 - Temperature control method for chemical vapor deposition apparatusAdvanced Patent SearchPublication numberUS20110143016 A1Publication typeApplicationApplication numberUS 12/881,253Publication dateJun 16, 2011Filing dateSep 14, 2010Priority dateDec 16, 2009Also published asCN102102196A, CN102102196B, CN103173745A, CN103173745B, US8481102Publication number12881253, 881253, US 2011/0143016 A1, US 2011/143016 A1, US 20110143016 A1, US 20110143016A1, US 2011143016 A1, US 2011143016A1, US-A1-20110143016, US-A1-2011143016, US2011/0143016A1, US2011/143016A1, US20110143016 A1, US20110143016A1, US2011143016 A1, US2011143016A1InventorsSung Jae Hong, Hong Won Lee, Seok Man Han, Joo JinOriginal AssigneeLigadp Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (2), Referenced by (8), Classifications (10), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetTemperature control method for chemical vapor deposition apparatus
US 20110143016 A1Abstract
1. A temperature control method for a chemical vapor deposition apparatus, the method comprising:
detecting a rotation state of a susceptor on which a substrate is loaded on a top surface thereof; measuring a temperature of the top surface of the susceptor; calculating a temperature distribution of the top surface of the susceptor, based on the detected rotation state and the measured temperature; and controlling the temperature of the top surface of the susceptor, based on the calculated temperature distribution. 2. The temperature control method of claim 1, wherein the rotation state comprises a rotation angle of the susceptor or a rotation time of the susceptor.
14. The temperature control method of claim 12, wherein the matching of the susceptor section comprises matching the susceptor section with the high-temperature section to minimize a deviation between an angle of a central portion or a boundary portion of the susceptor section and an angle of a central portion or a boundary portion of the high-temperature section. Description
[0033] Referring to FIG. 1, a chemical vapor deposition apparatus according to the exemplary embodiment includes a chamber 10, a susceptor 40, a gas supply part 30, heaters 50 a and 50 b, temperature sensors 20 a and 20 b, a rotation recognition mark 61 a, a rotation recognition sensor 62 a, a heater control part 71, a rotation recognition sensor control part 72, a temperature sensor control part 73, and a main control part 74.
[0035] The temperature sensors 20 a and 20 b may be disposed on an upper side of the chamber 10 to detect a temperature of the top surface of the susceptor 40. Alternatively, if a temperature of the substrate loaded on the susceptor 40 is adequately measurable, the temperature sensors 20 a and 20 b may be disposed on lateral surfaces or a bottom surface of the susceptor 40.
[0036] A pyrometer that uses light reflected from an object to measure a temperature in a noncontact fashion may be used as the temperature sensors 20 a and 20 b. For example, a pyrometer that measures a surface temperature with a frequency of about 700 Hz may be used as the temperature sensors 20 a and 20 b. [0037] Since the gas supply part 30 is disposed between the temperature sensors 20 a and 20 b and the susceptor 40, a through-hole 31 may be formed at the gas supply part 30 to receive light reflected from the top surface of the susceptor 40.
[0038] A plurality of temperatures sensors 20 a and 20 b may be arranged in a radius direction with respect to a rotation shaft 42 of the susceptor 40. Thus, a temperature distribution depending on a distance from the rotation shaft 42 of the susceptor 40 may be detected.
[0040] A plurality of heaters 50 a and 50 b, each having a doughnut shape and heating the susceptor 40, may be provided inside the susceptor 40. The heater control part 71 may individually control the plurality of heaters 50 a and 50 b. That is, the heater control part 71 may uniformly or proportionally or separately control the temperatures of the plurality of heaters 50 a and 50 b. [0041] The susceptor 40 may be rotated about the rotation shaft 42 at a high speed, but the heaters 50 a and 50 b may be maintained in a static state.
[0042] The rotation recognition mark 61 a may be placed on a bottom surface of the susceptor 40, and the rotation recognition sensor 62 a for detecting the rotation recognition mark 61 a may be placed outside the chamber 10.
[0043] The rotation recognition mark 61 a is not limited to the foregoing position. For example, the rotation recognition mark 61 a may be disposed on another position at which the rotation recognition mark 61 a is integrally rotated with the susceptor 40. The rotation recognition mark 61 a may include a concave part and a convex part and may further include a reflection part.
[0044] The rotation recognition mark 61 a is not limited to a specific configuration. For example, the rotation recognition mark 61 a may be formed of various shapes and materials which are recognizable by the rotation recognition sensor 62 a according to a sensing method of the rotation recognition sensor 62 a. [0045] There are various methods for detecting the rotation recognition mark. As one exemplary example, a method in which whether the rotation recognition mark 61 a passes over the rotation recognition sensors 61 a and 62 a is grasped by detecting a process in which light irradiated from the rotation recognition sensor 62 a passes a transparent window 63 to reach the rotation recognition mark 61 a, and then, the light reflected from the rotation recognition mark 61 a passes again the transparent window 63 to reach the rotation recognition sensor 62 a. That is, according to the method, a surface configuration change of the bottom surface of the susceptor 40 is detected.
[0048] Referring to FIG. 2, a rotation recognition sensor 62 b may be disposed adjacent to a rotation shaft 42 of a susceptor 40. The rotation recognition sensor 62 b has one side from which light L is irradiated and the other side in which the irradiated light is detected. A rotation recognition mark 61 b may be disposed on the rotation shaft 42 of the susceptor 40. The rotation recognition sensor 62 b may detect the moment when the rotation recognition mark 61 b screens the light L while passing over the rotation recognition sensor 62 b. [0049] FIG. 4 is a schematic plan view illustrating operations of a rotation recognition mark and a rotation recognition sensor according to another exemplary embodiment of the present invention.
[0050] Referring to FIG. 4A, one rotation recognition mark 61 b is provided. In this case, the rotation recognition sensor 62 b may detect a rotation state every 360 degrees. Here, the shorter period during which the rotation state is detected, the more accurately detected the rotation state is. Thus, a plurality of rotation recognition marks may be radially disposed around the rotation shaft of the susceptor.
[0051] Referring to FIG. 4B, two rotation recognition marks 61 b are provided. In this case, the rotation recognition sensor 62 b may detect the rotation state every 180 degrees.
[0052] Referring to FIG. 4C, four rotation recognition marks 61 b are provided. In this case, the rotation recognition sensor 62 b may detect the rotation state every 90 degrees.
[0053] Referring to FIG. 4D, four rotation recognition marks 61 b and two rotation recognition sensors 62 b are provided. In this case, the rotation recognition sensors 62 b may detect the rotation state every 45 degrees. When compared to FIG. 4( a), since the period during which the rotation state is detected is shorter, the rotation state may be more accurately detected even though the susceptor is rotated at a relatively low speed.
[0054] Referring to FIG. 4E, two rotation recognition marks 61 b and four rotation recognition sensors 62 b are provided. In this case, the rotation recognition sensors 62 b may detect the rotation state every 45 degrees.
[0055] Referring to FIG. 4F, eight rotation recognition marks 61 b and one rotation recognition sensor 62 b are provided. In this case, the rotation recognition sensor 62 b may detect the rotation state every 45 degrees. When the plurality of rotation recognition marks is densely arranged, the rotation state may be more accurately detected even though the susceptor is rotated at a relatively low speed.
[0057] Referring to FIG. 5, a process which sets an identifier (ID) for each of sections to identify each susceptor section and substrate section is illustrated. When based on a line connecting a center of a substrate pocket 41 on which a substrate is placed first on the outermost position of the susceptor to a center of the susceptor, the entire section may be divided into twelve substrate sections and twelve susceptor sections (for example, a 1st substrate section is set in the range of 0� to 14.5�, a 1st susceptor section is set in the range of 14.5� to 15.5�, a 2nd substrate section is set in the range of 15.5� to 44.5�, a 2nd susceptor section is set in the range of 44.5� to 45.5�, etc.). The identifier ID is not limited to Arabic numerals. For example, the identifier ID may be set to alphabets or other characters. Similarly, substrate sections and susceptor sections, which are disposed inwardly from the center of the susceptor may be set in a manner similar to the previous method.
[0062] There are various methods for performing the operation S103. As one example, a rotation angle (or rotation time) of the susceptor may be calculated using the rotation recognition sensor in operation S103 a, and the rotation angle (or rotation time) may be matched with a measured value of the temperature sensor to find out the temperature distribution for each angle (or temperature distribution for each time) in operation S103 b. For example, when four rotation recognition marks are provided, the susceptor may be rotated at about 90 degrees during a period in which the rotation recognition mark is detected. As a result, a rotation speed and a rotation angle during the elapsed time may be calculated.
[0064] Referring to FIG. 7, generally, substrate sections W1, W2, W3, and W4 have temperatures less than those of susceptor sections 51, S2, and S3. A temperature change section c in which a temperature is not constant occurs on a circumference portion of the substrate. In the operation S103 b, the temperature distribution shown in FIG. 7 may be found out.
[0068] Alternatively, excluding a section in which an average temperature change during a preset unit time is more than a preset temperature change from the temperature distribution in operation S105 a. Therefore, a temperature change section which occurs on a circumference portion of the substrate can be excluded from the temperature distribution. Then, by comparing average temperature of each section with each other, a section having a ratio greater than a preset ratio may be defined as the high-temperature section, and a section having a ratio less than the preset ratio may be defined as the low-temperature section in operation S105 b. [0069] Referring to FIG. 7, a section having a relatively high temperature of about 710 degrees centigrade or more is denoted by T1, and a section having a relatively low temperature of about 710 degrees centigrade or less is denoted by T2. The sections W1, W2, W3, and W4 except the temperature change section c may be defined as the substrate section, and the sections S1, S2, and S3 except the temperature change section c may be defined as the susceptor section.
[0077] There are various methods for excluding the temperature change section. As one example, a section in which the average temperature change during the preset unit time is greater than the preset temperature change is excluded from the susceptor section or the substrate section in operation S106 b. [0078] After the operation S106, the identifier ID is allotted to each of the susceptor section and the substrate section in operation S107. Then, in operation S109, a heater can be controlled based on a temperature of the section to which the identifier ID selected by a user is allotted. Since a specific section to which the identifier ID is allotted is selected by the user, a section required to be measured by a user may be identified and accurate temperature control is possible.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS6878395 *May 12, 2003Apr 12, 2005Aixtron Ag,Method and device for the temperature control of surface temperatures of substrates in a CVD reactorUS20100111511 *Oct 31, 2008May 6, 2010Nir MerryUse of infrared camera for real-time temperature monitoring and control* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS8104951 *Jan 31, 2012Applied Materials, Inc.Temperature uniformity measurements during rapid thermal processingUS8109669 *Nov 19, 2008Feb 7, 2012Applied Materials, Inc.Temperature uniformity measurement during thermal processingUS20080025368 *Jul 30, 2007Jan 31, 2008Wolfgang AderholdTemperature uniformity measurements during rapid thermal processingUS20100124249 *Nov 19, 2008May 20, 2010Applied Materials, Inc.Temperature uniformity measurement during thermal processingDE102013109155A1Aug 23, 2013Feb 26, 2015Aixtron SeSubstratbehandlungsvorrichtungDE102013114412A1 *Dec 18, 2013Jun 18, 2015Aixtron SeVorrichtung und Verfahren zur Regelung der Temperatur in einer Prozesskammer eines CVD-Reaktors unter Verwendung zweier TemperatursensoreinrichtungenWO2013037780A1 *Sep 12, 2012Mar 21, 2013Aixtron SeMethod and device for determining the deformation of a substrateWO2013172683A1 *May 16, 2013Nov 21, 2013Unitex Co.,LtdReactor for vapor deposition and method for manufacturing organic thin film* Cited by examinerClassifications U.S. Classification427/8International ClassificationC23C16/52Cooperative ClassificationC23C16/46, C23C16/4586, C23C16/52, C23C16/4584European ClassificationC23C16/458D2F, C23C16/52, C23C16/458D2B, C23C16/46Legal EventsDateCodeEventDescriptionSep 14, 2010ASAssignmentOwner name: LIGADP CO., LTD., KOREA, REPUBLIC OFEffective date: 20100730Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HONG, SUNG JAE;LEE, HONG WON;HAN, SEOK MAN;AND OTHERS;REEL/FRAME:024980/0438RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services