WO2021241561A1 - 熱処理装置 - Google Patents
熱処理装置 Download PDFInfo
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- WO2021241561A1 WO2021241561A1 PCT/JP2021/019761 JP2021019761W WO2021241561A1 WO 2021241561 A1 WO2021241561 A1 WO 2021241561A1 JP 2021019761 W JP2021019761 W JP 2021019761W WO 2021241561 A1 WO2021241561 A1 WO 2021241561A1
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- semiconductor wafer
- heat treatment
- susceptor
- flash
- diameter
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
- H10P72/70—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping
- H10P72/76—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using mechanical means, e.g. clamps or pinches
- H10P72/7604—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using mechanical means, e.g. clamps or pinches the wafers being placed on a susceptor, stage or support
- H10P72/7614—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using mechanical means, e.g. clamps or pinches the wafers being placed on a susceptor, stage or support characterised by a plurality of individual support members, e.g. support posts or protrusions
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P30/00—Ion implantation into wafers, substrates or parts of devices
- H10P30/20—Ion implantation into wafers, substrates or parts of devices into semiconductor materials, e.g. for doping
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P34/00—Irradiation with electromagnetic or particle radiation of wafers, substrates or parts of devices
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
- H10P72/04—Apparatus for manufacture or treatment
- H10P72/0431—Apparatus for thermal treatment
- H10P72/0436—Apparatus for thermal treatment mainly by radiation
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
- H10P72/06—Apparatus for monitoring, sorting, marking, testing or measuring
- H10P72/0602—Temperature monitoring
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
- H10P72/70—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
- H10P72/70—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping
- H10P72/76—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using mechanical means, e.g. clamps or pinches
- H10P72/7602—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using mechanical means, e.g. clamps or pinches the wafers being placed on a robot blade or gripped by a gripper for conveyance
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
- H10P72/70—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping
- H10P72/76—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using mechanical means, e.g. clamps or pinches
- H10P72/7604—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using mechanical means, e.g. clamps or pinches the wafers being placed on a susceptor, stage or support
- H10P72/7611—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using mechanical means, e.g. clamps or pinches the wafers being placed on a susceptor, stage or support characterised by edge profile or support profile
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
- H10P72/70—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping
- H10P72/76—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using mechanical means, e.g. clamps or pinches
- H10P72/7604—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using mechanical means, e.g. clamps or pinches the wafers being placed on a susceptor, stage or support
- H10P72/7612—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using mechanical means, e.g. clamps or pinches the wafers being placed on a susceptor, stage or support characterised by lifting arrangements, e.g. lift pins
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
- H10P72/70—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping
- H10P72/76—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using mechanical means, e.g. clamps or pinches
- H10P72/7604—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using mechanical means, e.g. clamps or pinches the wafers being placed on a susceptor, stage or support
- H10P72/7624—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using mechanical means, e.g. clamps or pinches the wafers being placed on a susceptor, stage or support characterised by the mechanical construction of the susceptor, stage or support
Definitions
- the present invention relates to a heat treatment apparatus that heats a thin plate-shaped precision electronic substrate (hereinafter, simply referred to as "substrate”) such as a semiconductor wafer by irradiating the substrate with flash light.
- substrate thin plate-shaped precision electronic substrate
- Flash lamp annealing In the semiconductor device manufacturing process, flash lamp annealing (FLA), which heats a semiconductor wafer in an extremely short time, is attracting attention.
- FLA flash lamp annealing
- Flash lamp annealing uses a xenon flash lamp (hereinafter, simply referred to as "flash lamp” to mean a xenon flash lamp) to irradiate the surface of the semiconductor wafer with flash light, thereby making only the surface of the semiconductor wafer extremely.
- flash lamp xenon flash lamp
- the radiation spectral distribution of the xenon flash lamp is from the ultraviolet region to the near infrared region, and the wavelength is shorter than that of the conventional halogen lamp, which is almost the same as the basic absorption band of the silicon semiconductor wafer. Therefore, when the semiconductor wafer is irradiated with the flash light from the xenon flash lamp, the transmitted light is small and the temperature of the semiconductor wafer can be rapidly raised. It has also been found that if the flash light is irradiated for an extremely short time of several milliseconds or less, the temperature can be selectively raised only in the vicinity of the surface of the semiconductor wafer.
- Such flash lamp annealing is used for a process that requires heating for a very short time, for example, typically for activating impurities injected into a semiconductor wafer.
- the surface of the semiconductor wafer can be raised to the activation temperature for a very short time, and the impurities are deeply diffused. Only impurity activation can be performed without causing it.
- flash light is emitted from the flash lamp in a state where the semiconductor wafer is supported by a plurality of support pins erected on the susceptor. Irradiate.
- the flash lamp momentarily irradiates the surface of the semiconductor wafer with flash light having extremely high energy, the surface temperature of the semiconductor wafer rises rapidly in an instant, but the back surface temperature does not rise so much. Therefore, a rapid thermal expansion occurs only on the surface of the semiconductor wafer, and the semiconductor wafer is deformed so as to have a convex surface and warp. As a result, especially when the energy of the flash light is increased, there is a problem that stress concentration occurs on the back surface of the semiconductor wafer and the semiconductor wafer is cracked.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a heat treatment apparatus capable of preventing the substrate from cracking even when irradiated with flash light.
- the first aspect of the present invention is a heat treatment apparatus for heating a substrate by irradiating the substrate with flash light, in which a chamber for accommodating the substrate and the substrate are held in the chamber.
- the flash light emitted from the flash lamp is provided with a susceptor, a plurality of support pins provided on the susceptor to support the substrate, and a flash lamp that irradiates the substrate held by the susceptor with flash light.
- the installation positions of the plurality of support pins on the susceptor differ depending on the pulse width of the lamp.
- the plurality of support pins are installed in an annular shape on the susceptor, and the shorter the pulse width is, the more the plurality of support pins are installed. The diameter of the circle increases.
- the diameter of the installation circle is larger than 93% of the diameter of the substrate, and the pulse width is described. Is 0.8 ms or more and less than 5 ms, the diameter of the installation circle is greater than 83% of the diameter of the substrate and 93% or less, and the pulse width is 5 ms or more and less than 10 ms.
- the diameter of the installation circle is greater than 77% and less than 83% of the diameter of the substrate and the pulse width is 10 ms or more and less than 20 ms
- the diameter of the installation circle is greater than 73% of the diameter of the substrate. When it is 77% or less and the pulse width is 20 milliseconds or more, the diameter of the installation circle is 73% or less of the diameter of the substrate.
- the fourth aspect further includes a pin moving mechanism for changing the positions of the plurality of support pins according to the pulse width in the heat treatment apparatus according to any one of the first to third aspects.
- a plurality of slits are formed in the susceptor along the radial direction, and the pin moving mechanism has the plurality of support pins. Slide it along the slit.
- the substrate since the installation positions of the plurality of support pins on the susceptor differ depending on the pulse width of the flash light emitted from the flash lamp, the substrate suddenly rises when the flash light is irradiated. It is possible to prevent the substrate from cracking even if it is deformed to.
- FIG. 1 is a vertical sectional view showing the configuration of the heat treatment apparatus 1 according to the present invention.
- the heat treatment apparatus 1 of FIG. 1 is a flash lamp annealing apparatus that heats a semiconductor wafer W having a disk shape as a substrate by irradiating the semiconductor wafer W with flash light.
- the size of the semiconductor wafer W to be processed is not particularly limited, but is, for example, ⁇ 300 mm or ⁇ 450 mm.
- the dimensions and numbers of each part are exaggerated or simplified as necessary for easy understanding.
- the heat treatment apparatus 1 includes a chamber 6 for accommodating a semiconductor wafer W, a flash heating unit 5 containing a plurality of flash lamp FLs, and a halogen heating unit 4 containing a plurality of halogen lamps HL.
- a flash heating unit 5 is provided on the upper side of the chamber 6, and a halogen heating unit 4 is provided on the lower side.
- the heat treatment apparatus 1 includes a holding portion 7 that holds the semiconductor wafer W in a horizontal posture inside the chamber 6, a transfer mechanism 10 that transfers the semiconductor wafer W between the holding portion 7 and the outside of the apparatus. To prepare for.
- the heat treatment apparatus 1 includes a halogen heating unit 4, a flash heating unit 5, and a control unit 3 that controls each operation mechanism provided in the chamber 6 to execute the heat treatment of the semiconductor wafer W.
- the chamber 6 is configured by mounting quartz chamber windows above and below the cylindrical chamber side portion 61.
- the chamber side portion 61 has a substantially tubular shape with upper and lower openings, and the upper chamber window 63 is attached to the upper opening and closed, and the lower chamber window 64 is attached to the lower opening and closed.
- the upper chamber window 63 constituting the ceiling portion of the chamber 6 is a disk-shaped member formed of quartz, and functions as a quartz window that transmits the flash light emitted from the flash heating portion 5 into the chamber 6.
- the lower chamber window 64 constituting the floor portion of the chamber 6 is also a disk-shaped member formed of quartz, and functions as a quartz window that transmits light from the halogen heating portion 4 into the chamber 6.
- the reflection ring 68 is attached to the upper part of the inner wall surface of the chamber side portion 61, and the reflection ring 69 is attached to the lower part. Both the reflection rings 68 and 69 are formed in an annular shape.
- the upper reflective ring 68 is attached by fitting from the upper side of the chamber side portion 61.
- the lower reflective ring 69 is attached by fitting it from the lower side of the chamber side portion 61 and fastening it with a screw (not shown). That is, both the reflective rings 68 and 69 are detachably attached to the chamber side portion 61.
- the inner space of the chamber 6, that is, the space surrounded by the upper chamber window 63, the lower chamber window 64, the chamber side 61, and the reflection rings 68, 69 is defined as the heat treatment space 65.
- a recess 62 is formed on the inner wall surface of the chamber 6. That is, a recess 62 is formed which is surrounded by the central portion of the inner wall surface of the chamber side portion 61 to which the reflection rings 68 and 69 are not attached, the lower end surface of the reflection ring 68, and the upper end surface of the reflection ring 69. ..
- the recess 62 is formed in an annular shape along the horizontal direction on the inner wall surface of the chamber 6 and surrounds the holding portion 7 that holds the semiconductor wafer W.
- the chamber side 61 and the reflective rings 68, 69 are made of a metal material (for example, stainless steel) having excellent strength and heat resistance.
- the chamber side portion 61 is provided with a transport opening (furnace port) 66 for loading and unloading the semiconductor wafer W into and out of the chamber 6.
- the transport opening 66 can be opened and closed by a gate valve 185.
- the transport opening 66 is communicated with the outer peripheral surface of the recess 62. Therefore, when the gate valve 185 opens the transport opening 66, the semiconductor wafer W is carried in from the transport opening 66 through the recess 62 into the heat treatment space 65 and the semiconductor wafer W is carried out from the heat treatment space 65. It can be performed. Further, when the gate valve 185 closes the transport opening 66, the heat treatment space 65 in the chamber 6 becomes a closed space.
- the through hole 61a is a cylindrical hole for guiding the infrared light emitted from the upper surface of the semiconductor wafer W held by the susceptor 74, which will be described later, to the upper radiation thermometer 25.
- the through hole 61b is a cylindrical hole for guiding the infrared light emitted from the lower surface of the semiconductor wafer W to the lower radiation thermometer 20.
- the through holes 61a and the through holes 61b are provided so as to be inclined with respect to the horizontal direction so that their axes in the through direction intersect the main surface of the semiconductor wafer W held by the susceptor 74.
- a transparent window 26 made of a calcium fluoride material that transmits infrared light in a wavelength region that can be measured by the upper radiation thermometer 25 is attached to the end of the through hole 61a on the side facing the heat treatment space 65.
- the upper radiation thermometer 25 receives infrared light radiated from the upper surface of the semiconductor wafer W through the transparent window 26, and measures the temperature of the upper surface of the semiconductor wafer W from the intensity of the infrared light.
- a transparent window 21 made of a fluorinated barium material that transmits infrared light in a wavelength region that can be measured by the lower radiation thermometer 20 is attached at the end of the through hole 61b on the side facing the heat treatment space 65.
- the lower radiation thermometer 20 receives infrared light radiated from the lower surface of the semiconductor wafer W through the transparent window 21, and measures the temperature of the lower surface of the semiconductor wafer W from the intensity of the infrared light.
- a gas supply hole 81 for supplying the processing gas to the heat treatment space 65 is formed in the upper part of the inner wall of the chamber 6.
- the gas supply hole 81 is formed at a position above the recess 62, and may be provided in the reflection ring 68.
- the gas supply hole 81 is communicated with the gas supply pipe 83 via a buffer space 82 formed in an annular shape inside the side wall of the chamber 6.
- the gas supply pipe 83 is connected to the processing gas supply source 85.
- a valve 84 is inserted in the middle of the path of the gas supply pipe 83. When the valve 84 is opened, the processing gas is supplied from the processing gas supply source 85 to the buffer space 82.
- the processing gas that has flowed into the buffer space 82 flows so as to expand in the buffer space 82 having a smaller fluid resistance than the gas supply hole 81, and is supplied from the gas supply hole 81 into the heat treatment space 65.
- the treatment gas supply source 85 is an inert gas such as nitrogen (N 2 ) or argon (Ar), or reactivity with oxygen (O 2 ), ozone (O 3 ), hydrogen (H 2 ) or the like as the treatment gas.
- a gas or a mixed gas in which they are mixed can be supplied into the chamber 6.
- a gas exhaust hole 86 for exhausting the gas in the heat treatment space 65 is formed in the lower part of the inner wall of the chamber 6.
- the gas exhaust hole 86 is formed at a position below the recess 62, and may be provided in the reflection ring 69.
- the gas exhaust hole 86 is communicatively connected to the gas exhaust pipe 88 via a buffer space 87 formed in an annular shape inside the side wall of the chamber 6.
- the gas exhaust pipe 88 is connected to the exhaust unit 190.
- a valve 89 is inserted in the middle of the path of the gas exhaust pipe 88. When the valve 89 is opened, the gas in the heat treatment space 65 is discharged from the gas exhaust hole 86 to the gas exhaust pipe 88 via the buffer space 87.
- a plurality of gas supply holes 81 and gas exhaust holes 86 may be provided along the circumferential direction of the chamber 6, or may be slit-shaped.
- a gas exhaust pipe 191 for discharging the gas in the heat treatment space 65 is also connected to the tip of the transport opening 66.
- the gas exhaust pipe 191 is connected to the exhaust unit 190 via a valve 192. By opening the valve 192, the gas in the chamber 6 is exhausted through the transport opening 66.
- the exhaust unit 190 is equipped with a vacuum pump. By opening the valves 89 and 192 while operating the exhaust unit 190, the atmosphere in the chamber 6 is discharged from the gas exhaust pipes 88 and 191 to the exhaust unit 190. When the atmosphere of the heat treatment space 65, which is a closed space, is exhausted by the exhaust unit 190 without supplying any gas from the gas supply hole 81, the pressure inside the chamber 6 can be reduced to less than the atmospheric pressure.
- FIG. 2 is a perspective view showing the overall appearance of the holding portion 7.
- the holding portion 7 includes a base ring 71, a connecting portion 72, and a susceptor 74.
- the base ring 71, the connecting portion 72 and the susceptor 74 are all made of quartz. That is, the entire holding portion 7 is made of quartz.
- the base ring 71 is an arc-shaped quartz member with a part missing from the ring shape. This missing portion is provided to prevent interference between the transfer arm 11 of the transfer mechanism 10 described later and the base ring 71.
- the base ring 71 By placing the base ring 71 on the bottom surface of the recess 62, the base ring 71 is supported on the wall surface of the chamber 6 (see FIG. 1).
- a plurality of connecting portions 72 (four in this embodiment) are erected on the upper surface of the base ring 71 along the circumferential direction of the annular shape.
- the connecting portion 72 is also a quartz member and is fixed to the base ring 71 by welding.
- FIG. 3 is a plan view of the susceptor 74.
- FIG. 4 is a cross-sectional view of the susceptor 74.
- the susceptor 74 includes a holding plate 75, a guide ring 76 and a plurality of substrate support pins 77.
- the holding plate 75 is a substantially circular flat plate-shaped member made of quartz. The diameter of the holding plate 75 is larger than the diameter of the semiconductor wafer W. That is, the holding plate 75 has a larger planar size than the semiconductor wafer W.
- a guide ring 76 is installed on the upper peripheral edge of the holding plate 75.
- the guide ring 76 is an annular member having an inner diameter larger than the diameter of the semiconductor wafer W. For example, when the diameter of the semiconductor wafer W is ⁇ 300 mm, the inner diameter of the guide ring 76 is ⁇ 320 mm.
- the inner circumference of the guide ring 76 is a tapered surface that widens upward from the holding plate 75.
- the guide ring 76 is made of quartz similar to the holding plate 75.
- the guide ring 76 may be welded to the upper surface of the holding plate 75, or may be fixed to the holding plate 75 by a separately processed pin or the like. Alternatively, the holding plate 75 and the guide ring 76 may be processed as an integral member.
- the region inside the guide ring 76 on the upper surface of the holding plate 75 is a flat holding surface 75a for holding the semiconductor wafer W.
- a plurality of substrate support pins 77 are erected on the holding surface 75a of the holding plate 75.
- a total of 12 substrate support pins 77 are erected at every 30 ° along the circumference of the outer peripheral circle (inner peripheral circle of the guide ring 76) of the holding surface 75a and the concentric circle.
- the diameter of the circle (distance between the opposing substrate support pins 77) in which the 12 substrate support pins 77 are arranged is smaller than the diameter of the semiconductor wafer W.
- Each substrate support pin 77 is made of quartz.
- the plurality of substrate support pins 77 may be provided on the upper surface of the holding plate 75 by welding, or may be processed integrally with the holding plate 75.
- the four connecting portions 72 erected on the base ring 71 and the peripheral edge portion of the holding plate 75 of the susceptor 74 are fixed by welding. That is, the susceptor 74 and the base ring 71 are fixedly connected by the connecting portion 72.
- the holding portion 7 is mounted on the chamber 6 by supporting the base ring 71 of the holding portion 7 on the wall surface of the chamber 6.
- the holding plate 75 of the susceptor 74 is in a horizontal posture (a posture in which the normal line coincides with the vertical direction). That is, the holding surface 75a of the holding plate 75 is a horizontal plane.
- the semiconductor wafer W carried into the chamber 6 is placed and held in a horizontal posture on the susceptor 74 of the holding portion 7 mounted on the chamber 6.
- the semiconductor wafer W is supported by the twelve substrate support pins 77 erected on the holding plate 75 and held by the susceptor 74. More precisely, the upper ends of the 12 substrate support pins 77 come into contact with the lower surface of the semiconductor wafer W to support the semiconductor wafer W. Since the heights of the 12 substrate support pins 77 (distance from the upper end of the substrate support pins 77 to the holding surface 75a of the holding plate 75) are uniform, the semiconductor wafer W is placed in a horizontal position by the 12 substrate support pins 77. Can be supported.
- the semiconductor wafer W is supported by a plurality of substrate support pins 77 from the holding surface 75a of the holding plate 75 at a predetermined interval.
- the thickness of the guide ring 76 is larger than the height of the board support pin 77. Therefore, the horizontal misalignment of the semiconductor wafer W supported by the plurality of substrate support pins 77 is prevented by the guide ring 76.
- the holding plate 75 of the susceptor 74 has an opening 78 formed vertically through the holding plate 75.
- the opening 78 is provided for the lower radiation thermometer 20 to receive synchrotron radiation (infrared light) radiated from the lower surface of the semiconductor wafer W. That is, the lower radiation thermometer 20 receives the light radiated from the lower surface of the semiconductor wafer W through the transparent window 21 mounted in the opening 78 and the through hole 61b of the chamber side portion 61, and the temperature of the semiconductor wafer W.
- the holding plate 75 of the susceptor 74 is provided with four through holes 79 through which the lift pin 12 of the transfer mechanism 10 described later penetrates for the transfer of the semiconductor wafer W.
- FIG. 5 is a plan view of the transfer mechanism 10.
- FIG. 6 is a side view of the transfer mechanism 10.
- the transfer mechanism 10 includes two transfer arms 11.
- the transfer arm 11 has an arc shape that generally follows the annular recess 62.
- Two lift pins 12 are erected on each transfer arm 11.
- the transfer arm 11 and the lift pin 12 are made of quartz.
- Each transfer arm 11 is rotatable by a horizontal movement mechanism 13.
- the horizontal movement mechanism 13 has a transfer operation position (solid line position in FIG. 5) for transferring the semiconductor wafer W to the holding portion 7 and the semiconductor wafer W held by the holding portion 7. It is horizontally moved to and from the retracted position (the two-point chain line position in FIG. 5) that does not overlap in a plan view.
- the horizontal movement mechanism 13 may be one in which each transfer arm 11 is rotated by an individual motor, or a pair of transfer arms 11 are interlocked and rotated by one motor using a link mechanism. It may be something to move.
- the pair of transfer arms 11 are moved up and down together with the horizontal movement mechanism 13 by the elevating mechanism 14.
- the elevating mechanism 14 raises the pair of transfer arms 11 at the transfer operation position, a total of four lift pins 12 pass through the through holes 79 (see FIGS. 2 and 3) drilled in the susceptor 74, and the lift pins The upper end of 12 protrudes from the upper surface of the susceptor 74.
- the elevating mechanism 14 lowers the pair of transfer arms 11 at the transfer operation position, the lift pin 12 is pulled out from the through hole 79, and the horizontal movement mechanism 13 moves the pair of transfer arms 11 so as to open each.
- the transfer arm 11 moves to the retracted position.
- the retracted position of the pair of transfer arms 11 is directly above the base ring 71 of the holding portion 7. Since the base ring 71 is placed on the bottom surface of the recess 62, the retracted position of the transfer arm 11 is inside the recess 62.
- An exhaust mechanism (not shown) is also provided in the vicinity of the portion where the drive unit (horizontal movement mechanism 13 and elevating mechanism 14) of the transfer mechanism 10 is provided, and the atmosphere around the drive unit of the transfer mechanism 10 is provided. Is configured to be discharged to the outside of the chamber 6.
- the chamber 6 is provided with two radiation thermometers (pyrometer in this embodiment), a lower radiation thermometer 20 and an upper radiation thermometer 25.
- the lower radiation thermometer 20 is provided diagonally below the semiconductor wafer W held by the susceptor 74.
- the lower radiation thermometer 20 receives infrared light radiated from the lower surface of the semiconductor wafer W and measures the temperature of the lower surface from the intensity of the infrared light.
- the upper radiation thermometer 25 is provided diagonally above the semiconductor wafer W held by the susceptor 74.
- the upper radiation thermometer 25 receives infrared light radiated from the upper surface of the semiconductor wafer W and measures the temperature of the upper surface from the intensity of the infrared light.
- the upper radiation thermometer 25 is provided with an InSb (indium antimonide) optical element so as to be able to respond to a sudden temperature change on the upper surface of the semiconductor wafer W at the moment when the flash light is irradiated.
- InSb indium antimonide
- the flash heating unit 5 provided above the chamber 6 is provided inside the housing 51 so as to cover a light source composed of a plurality of (30 in this embodiment) xenon flash lamp FL and the upper part of the light source.
- the reflector 52 is provided with the reflector 52.
- a lamp light radiation window 53 is attached to the bottom of the housing 51 of the flash heating unit 5.
- the lamp light emitting window 53 constituting the floor portion of the flash heating unit 5 is a plate-shaped quartz window made of quartz.
- the plurality of flash lamps FL are rod-shaped lamps, each having a long cylindrical shape, and their respective longitudinal directions are along the main surface of the semiconductor wafer W held by the holding portion 7 (that is, along the horizontal direction). They are arranged in a plane so as to be parallel to each other. Therefore, the plane formed by the arrangement of the flash lamp FL is also a horizontal plane. The region where the plurality of flash lamps FL are arranged is larger than the plane size of the semiconductor wafer W.
- the xenon flash lamp FL has a cylindrical glass tube (discharge tube) in which xenon gas is sealed inside and an anode and a cathode connected to a condenser are arranged at both ends thereof, and on the outer peripheral surface of the glass tube. It is provided with an attached trigger electrode. Since xenon gas is electrically an insulator, electricity does not flow in the glass tube under normal conditions even if electric charges are accumulated in the condenser. However, when a high voltage is applied to the trigger electrode to break the insulation, the electricity stored in the capacitor instantly flows into the glass tube, and the light is emitted by the excitation of the xenon atom or molecule at that time.
- the electrostatic energy stored in the capacitor in advance is converted into an extremely short optical pulse of 0.1 ms to 100 ms, so that the halogen lamp HL is continuously lit. It has the feature that it can irradiate extremely strong light compared to a light source. That is, the flash lamp FL is a pulsed light emitting lamp that instantaneously emits light in an extremely short time of less than 1 second. The light emission time of the flash lamp FL can be adjusted by the coil constant of the lamp power supply that supplies power to the flash lamp FL.
- the reflector 52 is provided above the plurality of flash lamps FL so as to cover all of them.
- the basic function of the reflector 52 is to reflect the flash light emitted from the plurality of flash lamps FL toward the heat treatment space 65.
- the reflector 52 is made of an aluminum alloy plate, and its surface (the surface facing the flash lamp FL) is roughened by blasting.
- the halogen heating unit 4 provided below the chamber 6 contains a plurality of halogen lamps HL (40 in this embodiment) inside the housing 41.
- the halogen heating unit 4 heats the semiconductor wafer W by irradiating the heat treatment space 65 with light from below the chamber 6 through the lower chamber window 64 by a plurality of halogen lamps HL.
- FIG. 7 is a plan view showing the arrangement of a plurality of halogen lamps HL.
- the 40 halogen lamps HL are arranged in two upper and lower stages. Twenty halogen lamps HL are arranged in the upper stage near the holding portion 7, and 20 halogen lamp HLs are also arranged in the lower stage farther from the holding portion 7 than in the upper stage.
- Each halogen lamp HL is a rod-shaped lamp having a long cylindrical shape.
- the 20 halogen lamps HL in both the upper and lower stages are arranged so that their longitudinal directions are parallel to each other along the main surface of the semiconductor wafer W held by the holding portion 7 (that is, along the horizontal direction). There is. Therefore, the plane formed by the arrangement of the halogen lamps HL in both the upper and lower stages is a horizontal plane.
- the arrangement density of the halogen lamp HL in the region facing the peripheral edge portion is higher than the region facing the central portion of the semiconductor wafer W held by the holding portion 7 in both the upper and lower stages.
- the arrangement pitch of the halogen lamp HL is shorter in the peripheral portion than in the central portion of the lamp arrangement. Therefore, it is possible to irradiate a peripheral portion of the semiconductor wafer W, which tends to have a temperature drop during heating by light irradiation from the halogen heating unit 4, with a larger amount of light.
- the lamp group consisting of the halogen lamp HL in the upper stage and the lamp group consisting of the halogen lamp HL in the lower stage are arranged so as to intersect in a grid pattern. That is, a total of 40 halogen lamps HL are arranged so that the longitudinal direction of the 20 halogen lamps HL arranged in the upper stage and the longitudinal direction of the 20 halogen lamps HL arranged in the lower stage are orthogonal to each other. There is.
- the halogen lamp HL is a filament type light source that incandescentizes the filament and emits light by energizing the filament arranged inside the glass tube. Inside the glass tube, a gas in which a trace amount of a halogen element (iodine, bromine, etc.) is introduced into an inert gas such as nitrogen or argon is enclosed. By introducing the halogen element, it becomes possible to set the temperature of the filament to a high temperature while suppressing the breakage of the filament. Therefore, the halogen lamp HL has a characteristic that it has a longer life than a normal incandescent lamp and can continuously irradiate strong light.
- a halogen element iodine, bromine, etc.
- the halogen lamp HL is a continuously lit lamp that continuously emits light for at least 1 second or longer. Further, since the halogen lamp HL is a rod-shaped lamp, it has a long life, and by arranging the halogen lamp HL along the horizontal direction, the radiation efficiency to the upper semiconductor wafer W becomes excellent.
- a reflector 43 is provided under the two-stage halogen lamp HL (FIG. 1).
- the reflector 43 reflects the light emitted from the plurality of halogen lamps HL toward the heat treatment space 65.
- the control unit 3 controls the above-mentioned various operating mechanisms provided in the heat treatment apparatus 1.
- the configuration of the control unit 3 as hardware is the same as that of a general computer. That is, the control unit 3 includes a CPU, which is a circuit that performs various arithmetic processes, a ROM, which is a read-only memory for storing basic programs, a RAM, which is a read / write memory for storing various information, and control software and data. It has a magnetic disk to store.
- the CPU of the control unit 3 executes a predetermined processing program, the processing in the heat treatment apparatus 1 proceeds.
- the heat treatment apparatus 1 prevents an excessive temperature rise of the halogen heating unit 4, the flash heating unit 5, and the chamber 6 due to the heat energy generated from the halogen lamp HL and the flash lamp FL during the heat treatment of the semiconductor wafer W. Therefore, it has various cooling structures.
- a water cooling pipe (not shown) is provided on the wall of the chamber 6.
- the halogen heating unit 4 and the flash heating unit 5 have an air-cooled structure in which a gas flow is formed inside to exhaust heat.
- air is also supplied to the gap between the upper chamber window 63 and the lamp light radiating window 53 to cool the flash heating unit 5 and the upper chamber window 63.
- the semiconductor wafer W to be processed is a semiconductor substrate to which impurities (ions) have been added by the ion implantation method.
- the activation of the impurities is executed by the flash light irradiation heat treatment (annealing) by the heat treatment apparatus 1.
- the processing procedure of the heat treatment apparatus 1 described below proceeds by the control unit 3 controlling each operation mechanism of the heat treatment apparatus 1.
- the valve 84 for air supply is opened, and the valve 89 for exhaust is opened to start air supply / exhaust to the inside of the chamber 6.
- the valve 84 is opened, nitrogen gas is supplied to the heat treatment space 65 from the gas supply hole 81.
- the valve 89 is opened, the gas in the chamber 6 is exhausted from the gas exhaust hole 86.
- the nitrogen gas supplied from the upper part of the heat treatment space 65 in the chamber 6 flows downward and is exhausted from the lower part of the heat treatment space 65.
- valve 192 when the valve 192 is opened, the gas in the chamber 6 is exhausted from the transport opening 66 as well. Further, the atmosphere around the drive unit of the transfer mechanism 10 is also exhausted by the exhaust mechanism (not shown). During the heat treatment of the semiconductor wafer W in the heat treatment apparatus 1, nitrogen gas is continuously supplied to the heat treatment space 65, and the supply amount thereof is appropriately changed according to the processing step.
- the gate valve 185 is opened to open the transfer opening 66, and the semiconductor wafer W to be processed is carried into the heat treatment space 65 in the chamber 6 through the transfer opening 66 by the transfer robot outside the apparatus.
- the atmosphere outside the apparatus may be entrained with the loading of the semiconductor wafer W, but since the nitrogen gas continues to be supplied to the chamber 6, the nitrogen gas flows out from the transport opening 66, and such a situation occurs. It is possible to minimize the entrainment of the external atmosphere.
- the semiconductor wafer W carried in by the transfer robot advances to a position directly above the holding portion 7 and stops. Then, the pair of transfer arms 11 of the transfer mechanism 10 move horizontally from the retracted position to the transfer operation position and rise, so that the lift pin 12 protrudes from the upper surface of the holding plate 75 of the susceptor 74 through the through hole 79. And receive the semiconductor wafer W. At this time, the lift pin 12 rises above the upper end of the substrate support pin 77.
- the transfer robot After the semiconductor wafer W is placed on the lift pin 12, the transfer robot exits the heat treatment space 65, and the transfer opening 66 is closed by the gate valve 185. Then, as the pair of transfer arms 11 descend, the semiconductor wafer W is transferred from the transfer mechanism 10 to the susceptor 74 of the holding portion 7 and held in a horizontal posture from below.
- the semiconductor wafer W is supported by a plurality of substrate support pins 77 erected on the holding plate 75 and held by the susceptor 74. Further, the semiconductor wafer W is held in the holding portion 7 with the surface on which the pattern is formed and the impurities are injected as the upper surface.
- a predetermined distance is formed between the back surface of the semiconductor wafer W supported by the plurality of substrate support pins 77 (the main surface opposite to the front surface) and the holding surface 75a of the holding plate 75.
- the pair of transfer arms 11 descending to the lower part of the susceptor 74 are retracted to the retracted position, that is, inside the recess 62 by the horizontal moving mechanism 13.
- the 40 halogen lamps HL of the halogen heating portion 4 are turned on all at once for preheating (assist heating). ) Is started.
- the halogen light emitted from the halogen lamp HL passes through the lower chamber window 64 and the susceptor 74 made of quartz and irradiates the lower surface of the semiconductor wafer W.
- the semiconductor wafer W is preheated and the temperature rises. Since the transfer arm 11 of the transfer mechanism 10 is retracted inside the recess 62, it does not interfere with heating by the halogen lamp HL.
- the temperature of the semiconductor wafer W, which is raised by the irradiation of light from the halogen lamp HL, is measured by the lower radiation thermometer 20.
- the measured temperature of the semiconductor wafer W is transmitted to the control unit 3.
- the control unit 3 controls the output of the halogen lamp HL while monitoring whether or not the temperature of the semiconductor wafer W, which is raised by the light irradiation from the halogen lamp HL, has reached a predetermined preheating temperature T1. That is, the control unit 3 feedback-controls the output of the halogen lamp HL so that the temperature of the semiconductor wafer W becomes the preheating temperature T1 based on the measured value by the lower radiation thermometer 20.
- the preheating temperature T1 is set to about 200 ° C.
- the control unit 3 After the temperature of the semiconductor wafer W reaches the preheating temperature T1, the control unit 3 maintains the semiconductor wafer W at the preheating temperature T1 for a while. Specifically, when the temperature of the semiconductor wafer W measured by the lower radiation thermometer 20 reaches the preheating temperature T1, the control unit 3 adjusts the output of the halogen lamp HL to substantially adjust the temperature of the semiconductor wafer W. The preheating temperature is maintained at T1.
- the entire semiconductor wafer W is uniformly heated to the preheating temperature T1.
- the temperature of the peripheral portion of the semiconductor wafer W which is more likely to dissipate heat, tends to be lower than that of the central portion.
- the region facing the peripheral portion is higher than the region facing the central portion of the semiconductor wafer W. Therefore, the amount of light irradiated to the peripheral portion of the semiconductor wafer W where heat dissipation is likely to occur increases, and the in-plane temperature distribution of the semiconductor wafer W in the preheating step can be made uniform.
- the flash lamp FL of the flash heating unit 5 irradiates the surface of the semiconductor wafer W held by the susceptor 74 with flash light. At this time, a part of the flash light radiated from the flash lamp FL goes directly into the chamber 6, and a part of the other part is once reflected by the reflector 52 and then goes into the chamber 6, and these flash lights are used.
- the semiconductor wafer W is flash-heated by irradiation.
- the flash heating is performed by irradiating the flash light (flash) from the flash lamp FL
- the surface temperature of the semiconductor wafer W can be raised in a short time. That is, the flash light emitted from the flash lamp FL has an extremely short irradiation time of about 0.1 ms or more and 100 ms or less, in which the electrostatic energy stored in the capacitor in advance is converted into an extremely short optical pulse. It is a strong flash.
- the surface temperature of the semiconductor wafer W flash-heated by the flash light irradiation from the flash lamp FL momentarily rises to the processing temperature T2 of 1000 ° C. or higher, and the impurities injected into the semiconductor wafer W are activated. After that, the surface temperature drops rapidly.
- the surface temperature of the semiconductor wafer W can be raised or lowered in an extremely short time, so that the impurities are activated while suppressing the diffusion of the impurities injected into the semiconductor wafer W due to heat. Can be done. Since the time required for the activation of impurities is extremely short compared to the time required for the thermal diffusion, the activation can be performed even for a short time in which diffusion of about 0.1 ms to 100 ms does not occur. Complete.
- the halogen lamp HL turns off after a predetermined time has elapsed.
- the semiconductor wafer W rapidly drops from the preheating temperature T1.
- the temperature of the semiconductor wafer W during the temperature decrease is measured by the lower radiation thermometer 20, and the measurement result is transmitted to the control unit 3.
- the control unit 3 monitors whether or not the temperature of the semiconductor wafer W has dropped to a predetermined temperature based on the measurement result of the lower radiation thermometer 20. Then, after the temperature of the semiconductor wafer W is lowered to a predetermined level or less, the pair of transfer arms 11 of the transfer mechanism 10 horizontally move from the retracted position to the transfer operation position again and rise, so that the lift pin 12 is a susceptor.
- the semiconductor wafer W that protrudes from the upper surface of the 74 and has been heat-treated is received from the susceptor 74. Subsequently, the transfer opening 66 closed by the gate valve 185 is opened, the semiconductor wafer W mounted on the lift pin 12 is carried out from the chamber 6 by a transfer robot outside the apparatus, and the semiconductor wafer W in the heat treatment apparatus 1 is carried out. The heat treatment is completed.
- the surface temperature of the semiconductor wafer W momentarily rises to the processing temperature T2 of 1000 ° C. or higher, while the back surface temperature at that moment is not so much from the preheating temperature T1. Does not rise. That is, a temperature difference is instantaneously generated between the upper surface and the lower surface of the semiconductor wafer W.
- a temperature difference is instantaneously generated between the upper surface and the lower surface of the semiconductor wafer W.
- the inventor of the present application found that the semiconductor wafer W was cracked by changing the installation positions of the plurality of substrate support pins 77 on the susceptor 74 according to the pulse width of the flash light emitted from the flash lamp FL. We found that it could be reduced.
- the present invention has been completed based on this finding, and the shorter the pulse width of the flash light, the larger the diameter of the installation circle in which the plurality of substrate support pins 77 are installed.
- FIG. 8 is a diagram illustrating the pulse width of the flash light emitted from the flash lamp FL.
- the change in the intensity of the flash light becomes a pulse as shown in FIG.
- the peak intensity is the maximum intensity P.
- the "pulse width" is a half width of a pulse. That is, in FIG. 8, the time tp from the time t1 at which the maximum intensity P becomes half (P / 2) when the pulse intensity increases to the time t2 at which the maximum intensity P becomes half when the pulse intensity decreases. Is the pulse width.
- FIG. 9 is a diagram illustrating an installation circle in which the board support pin 77 is installed.
- twelve substrate support pins 77 are installed on the susceptor 74 in an annular shape at every 30 °.
- the circle formed by the plurality of substrate support pins 77 installed in an annular shape is the installation circle 98.
- the diameter of the installation circle 98 is naturally smaller than the diameter of the semiconductor wafer W. That is, if the diameter of the semiconductor wafer W is ⁇ 300 mm, the radius of the installation circle 98 is 150 mm or less.
- FIG. 10 is a diagram showing the correlation between the pulse width that can reduce the cracking of the semiconductor wafer W and the diameter of the installation circle 98.
- the pulse width of the flash light emitted from the flash lamp FL is specified in the recipe.
- the recipe defines the processing procedure and processing conditions of the semiconductor wafer W. Therefore, when the pulse width specified in the recipe is short, if a susceptor 74 having a large diameter of the installation circle 98 in which a plurality of substrate support pins 77 are installed is used, the semiconductor wafer W will be cracked during flash light irradiation. Can be reduced.
- FIG. 11 is a diagram showing a more specific correspondence between the pulse width that can reduce the cracking of the semiconductor wafer W and the diameter of the installation circle 98.
- the diameter of the semiconductor wafer W is ⁇ 300 mm.
- the radius of the installation circle 98 can be made larger than 140 mm (that is, the radius of the installation circle 98 can be set to the radius of the semiconductor wafer W. If it is made larger than 93%), the cracking of the semiconductor wafer W at the time of flash light irradiation can be reduced.
- the upper limit of the radius of the installation circle 98 is 150 mm.
- the radius of the installation circle 98 should be larger than 125 mm and 140 mm or less (that is, the radius of the installation circle 98 should be the radius of the semiconductor wafer W). If it is larger than 83% of the radius and 93% or less), cracking of the semiconductor wafer W can be reduced.
- the pulse width is 5 ms or more and less than 10 ms, if the radius of the installation circle 98 is larger than 115 mm and 125 mm or less (that is, the radius of the installation circle 98 is larger than 77% of the radius of the semiconductor wafer W and 83). If it is less than%), cracking of the semiconductor wafer W can be reduced.
- the pulse width is 10 ms or more and less than 20 ms
- the radius of the installation circle 98 is larger than 110 mm and 115 mm or less (that is, the radius of the installation circle 98 is larger than 73% of the radius of the semiconductor wafer W 77). If it is less than%), cracking of the semiconductor wafer W can be reduced.
- the pulse width is 20 milliseconds or more
- the radius of the installation circle 98 is 110 mm or less (that is, if the radius of the installation circle 98 is 73% or less of the radius of the semiconductor wafer W)
- the semiconductor wafer Cracking of W can be reduced.
- the semiconductor wafer W is held on the susceptor 74 in which a plurality of substrate support pins 77 are arranged along the installation circle 98 having a radius as shown in FIG. 11, even if the semiconductor wafer W is momentarily warped during flash light irradiation, the semiconductor is semiconductor. It is possible to prevent the wafer W from cracking.
- the shorter the pulse width of the flash light emitted from the flash lamp FL the larger the diameter of the installation circle 98 in which the plurality of substrate support pins 77 are installed. If the flash light is irradiated from the flash lamp FL while the semiconductor wafer W is supported by such a plurality of substrate support pins 77, the semiconductor wafer W is prevented from cracking even if the semiconductor wafer W is suddenly deformed by the flash light irradiation. can do.
- the overall configuration of the heat treatment apparatus 1 of the second embodiment is the same as that of the first embodiment. Further, the processing procedure of the semiconductor wafer W in the second embodiment is the same as that in the first embodiment.
- the second embodiment differs from the first embodiment in the structure of the susceptor 74 and the plurality of substrate support pins 77.
- FIG. 12 is a plan view of the susceptor 74a of the second embodiment.
- the overall shape and material of the susceptor 74a are the same as those of the susceptor 74 of the first embodiment.
- the susceptor 74a of the second embodiment is provided with 12 slits 97.
- the 12 slits 97 are provided at equal intervals of 30 °.
- Each of the twelve slits 97 is formed from the outer peripheral end of the susceptor 74a toward the center along the radial direction of the susceptor 74a having a substantially disk shape.
- the width of each slit 97 is less than 8 mm, which is larger than the width of the substrate support pin 77.
- the length of each slit 97 can be an appropriate value, but is preferably 50 mm or more.
- FIG. 13 is a diagram showing how the substrate support pin 77 is slid and moved with respect to the slit 97 of the susceptor 74a.
- twelve substrate support pins 77 are movably provided. Each of the twelve substrate support pins 77 is slid back and forth along the slit 97 by the pin moving mechanism 94. Since the slit 97 is provided along the radial direction of the susceptor 74a, the substrate support pin 77 is also moved along the radial direction of the susceptor 74a. The upper end of the substrate support pin 77 protrudes above the upper surface of the susceptor 74a.
- the position of the substrate support pin 77 in the second embodiment is the same as that in the first embodiment. That is, the pin moving mechanism 94 positions the substrate support pin 77 so that the shorter the pulse width of the flash light emitted from the flash lamp FL, the larger the diameter of the installation circle 98 in which the plurality of substrate support pins 77 are installed. Move it. More specifically, the substrate support pin 77 is moved so that the correlation between the pulse width of the flash light and the radius of the installation circle 98 is as shown in FIG. Based on the pulse width specified in the recipe, the control unit 3 controls the pin movement mechanism 94 to move the plurality of board support pins 77 so that the radius of the installation circle 98 is as shown in FIG. You may let it.
- the diameter of the flashlight is increased. Therefore, as in the first embodiment, if the semiconductor wafer W is irradiated with the flash light while the semiconductor wafer W is supported by the plurality of substrate support pins 77, even if the semiconductor wafer W is rapidly deformed by the flash light irradiation, the semiconductor wafer W can be irradiated. Cracking can be prevented.
- the present invention can be modified in various ways other than those described above as long as it does not deviate from the gist thereof.
- the susceptor 74 is provided with 12 substrate support pins 77, but the present invention is not limited to this, and the number of substrate support pins 77 may be 3 or more, and 4 thereof. Or 8 pieces.
- the susceptor 74a is provided with the same number of slits 97 as the substrate support pins 77.
- the flash heating unit 5 is provided with 30 flash lamp FLs, but the present invention is not limited to this, and the number of flash lamp FLs can be any number. .. Further, the flash lamp FL is not limited to the xenon flash lamp, and may be a krypton flash lamp. Further, the number of halogen lamps HL provided in the halogen heating unit 4 is not limited to 40, and may be any number.
- the semiconductor wafer W is preheated by using a filament type halogen lamp HL as a continuous lighting lamp that continuously emits light for 1 second or longer, but the present invention is not limited to this.
- a discharge type arc lamp for example, a xenon arc lamp
- a continuous lighting lamp to perform preheating.
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Abstract
Description
まず、本発明に係る熱処理装置の全体構成について説明する。図1は、本発明に係る熱処理装置1の構成を示す縦断面図である。図1の熱処理装置1は、基板として円板形状の半導体ウェハーWに対してフラッシュ光照射を行うことによってその半導体ウェハーWを加熱するフラッシュランプアニール装置である。処理対象となる半導体ウェハーWのサイズは特に限定されるものではないが、例えばφ300mmやφ450mmである。なお、図1および以降の各図においては、理解容易のため、必要に応じて各部の寸法や数を誇張または簡略化して描いている。
次に、本発明の第2実施形態について説明する。第2実施形態の熱処理装置1の全体構成は第1実施形態と同じである。また、第2実施形態における半導体ウェハーWの処理手順も第1実施形態と同様である。第2実施形態が第1実施形態と相違するのは、サセプタ74および複数の基板支持ピン77の構造である。
以上、本発明の実施の形態について説明したが、この発明はその趣旨を逸脱しない限りにおいて上述したもの以外に種々の変更を行うことが可能である。例えば、上記実施形態においては、サセプタ74に12個の基板支持ピン77を設けていたが、これに限定されるものではなく、基板支持ピン77の個数は3個以上であれば良く、4個や8個であっても良い。第2実施形態では、基板支持ピン77と同数のスリット97がサセプタ74aに設けられる。
3 制御部
4 ハロゲン加熱部
5 フラッシュ加熱部
6 チャンバー
7 保持部
10 移載機構
65 熱処理空間
74,74a サセプタ
75 保持プレート
77 基板支持ピン
94 ピン移動機構
97 スリット
98 設置円
190 排気部
FL フラッシュランプ
HL ハロゲンランプ
W 半導体ウェハー
Claims (5)
- 基板にフラッシュ光を照射することによって該基板を加熱する熱処理装置であって、
基板を収容するチャンバーと、
前記チャンバー内にて前記基板を保持するサセプタと、
前記サセプタに設けられて前記基板を支持する複数の支持ピンと、
前記サセプタに保持された前記基板にフラッシュ光を照射するフラッシュランプと、
を備え、
前記フラッシュランプから照射されるフラッシュ光のパルス幅に応じて前記サセプタ上における前記複数の支持ピンの設置位置が異なる熱処理装置。 - 請求項1記載の熱処理装置において、
前記複数の支持ピンは前記サセプタ上に円環状に設置され、
前記パルス幅が短くなるほど、前記複数の支持ピンを設置した設置円の径が大きくなる熱処理装置。 - 請求項2記載の熱処理装置において、
前記パルス幅が0.8ミリ秒未満のときには、前記設置円の径が前記基板の径の93%より大きく、
前記パルス幅が0.8ミリ秒以上5ミリ秒未満のときには、前記設置円の径が前記基板の径の83%より大きく93%以下であり、
前記パルス幅が5ミリ秒以上10ミリ秒未満のときには、前記設置円の径が前記基板の径の77%より大きく83%以下であり、
前記パルス幅が10ミリ秒以上20ミリ秒未満のときには、前記設置円の径が前記基板の径の73%より大きく77%以下であり、
前記パルス幅が20ミリ秒以上のときには、前記設置円の径が前記基板の径の73%以下である熱処理装置。 - 請求項1から請求項3のいずれかに記載の熱処理装置において、
前記パルス幅に応じて前記複数の支持ピンの位置を変更するピン移動機構をさらに備える熱処理装置。 - 請求項4記載の熱処理装置において、
前記サセプタには径方向に沿って複数のスリットが形設され、
前記ピン移動機構は、前記複数の支持ピンを前記複数のスリットに沿ってスライド移動させる熱処理装置。
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| KR1020227041690A KR102815203B1 (ko) | 2020-05-29 | 2021-05-25 | 열처리 장치 |
| US17/926,642 US20230207348A1 (en) | 2020-05-29 | 2021-05-25 | Heat treatment apparatus |
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| JP6303592B2 (ja) * | 2014-02-25 | 2018-04-04 | 東京エレクトロン株式会社 | 基板処理装置 |
| JP6296299B2 (ja) | 2014-09-02 | 2018-03-20 | パナソニックIpマネジメント株式会社 | プラズマ処理装置およびプラズマ処理方法 |
| JP6369297B2 (ja) * | 2014-11-12 | 2018-08-08 | 株式会社Sumco | 半導体ウェーハの支持方法及びその支持装置 |
| CN205231018U (zh) * | 2015-08-20 | 2016-05-11 | 贵州大学 | 新型硅镱量子面等离子体光源 |
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- 2021-05-25 WO PCT/JP2021/019761 patent/WO2021241561A1/ja not_active Ceased
- 2021-05-25 CN CN202180035426.9A patent/CN115668455B/zh active Active
- 2021-05-25 US US17/926,642 patent/US20230207348A1/en active Pending
- 2021-05-25 KR KR1020227041690A patent/KR102815203B1/ko active Active
- 2021-05-26 TW TW110119055A patent/TWI761218B/zh active
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| JP2003338505A (ja) * | 2002-05-22 | 2003-11-28 | Sumitomo Mitsubishi Silicon Corp | シリコンウェーハの支持方法 |
| WO2004086496A1 (ja) * | 2003-03-26 | 2004-10-07 | Shin-Etsu Handotai Co., Ltd. | 熱処理用ウェーハ支持具及び熱処理装置 |
| JP2007188914A (ja) * | 2006-01-11 | 2007-07-26 | Ushio Inc | 半導体ウエハ急速加熱装置 |
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| JP2017139315A (ja) * | 2016-02-03 | 2017-08-10 | 株式会社Screenホールディングス | 熱処理用サセプタおよび熱処理装置 |
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| JP7523952B2 (ja) | 2024-07-29 |
| KR102815203B1 (ko) | 2025-05-30 |
| CN115668455B (zh) | 2025-08-22 |
| CN115668455A (zh) | 2023-01-31 |
| KR20230003147A (ko) | 2023-01-05 |
| TW202147491A (zh) | 2021-12-16 |
| US20230207348A1 (en) | 2023-06-29 |
| JP2021190552A (ja) | 2021-12-13 |
| TWI761218B (zh) | 2022-04-11 |
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