WO2005124853A1 - ロードポート - Google Patents
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- Publication number
- WO2005124853A1 WO2005124853A1 PCT/JP2004/009041 JP2004009041W WO2005124853A1 WO 2005124853 A1 WO2005124853 A1 WO 2005124853A1 JP 2004009041 W JP2004009041 W JP 2004009041W WO 2005124853 A1 WO2005124853 A1 WO 2005124853A1
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- WIPO (PCT)
- Prior art keywords
- nozzle
- load port
- door opening
- port
- section
- Prior art date
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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
- H01L21/677—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 conveying, e.g. between different workstations
- H01L21/67763—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 conveying, e.g. between different workstations the wafers being stored in a carrier, involving loading and unloading
- H01L21/67775—Docking arrangements
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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
- H01L21/677—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 conveying, e.g. between different workstations
- H01L21/67763—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 conveying, e.g. between different workstations the wafers being stored in a carrier, involving loading and unloading
- H01L21/67772—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 conveying, e.g. between different workstations the wafers being stored in a carrier, involving loading and unloading involving removal of lid, door, cover
Definitions
- the present invention relates to a lid for a substrate storage container (hereinafter, referred to as a wafer carrier) provided in a substrate processing apparatus to which various substrates such as a silicon wafer (hereinafter, referred to as a wafer) are transported, and for storing wafers at predetermined intervals. , Referred to as a carrier door).
- a wafer carrier a substrate storage container
- various substrates such as a silicon wafer (hereinafter, referred to as a wafer) are transported, and for storing wafers at predetermined intervals.
- a carrier door Referred to as a carrier door
- this type of load port has a mouth port door that engages with a carrier door, a load port door opening / closing mechanism for opening and closing the load port door, and the like. What is replaced (hereinafter called purging) is known.
- -Patent Document 1 discloses an upper wall and a lower wall for partitioning a processing space in a substrate processing apparatus into a predetermined space adjacent to an open surface of a carrier door, and an EFEM (Equipment t Front End Module).
- a load port that includes a door and the like and purges the atmosphere of the wafer carrier in the predetermined space is disclosed.
- the load port of Patent Document 1 supplies N 2 gas or the like (hereinafter referred to as purge gas) for purging the atmosphere of the wafer carrier from obliquely above the open surface of the wafer carrier.
- purge gas N 2 gas or the like
- the purge gas may not be supplied sufficiently to the gap between the wafers. Even if the flow rate of the purge gas is increased, it is difficult to perform the purge sufficiently, and the cost required for the purge is low. Can be higher. Further, since the load port of Patent Document 1 has an EF EM mechanism for opening and closing the EF EM door, the load port protrudes into the processing space in the substrate processing apparatus. The configuration was set to within 0 mm, which did not conform to the so-called SEMI standard.
- Patent Document 1 Japanese Patent Application Laid-Open Publication No. 2003-49593 (FIG. 13)
- An object of the present invention is to provide a mouth port that can perform purging in a short time and with high accuracy.
- a substrate having a curved inner wall at a position facing the container opening, and a lid member at the container opening of the substrate storage container for storing substrates at predetermined intervals therein is provided with the substrate being conveyed.
- a load port that is engaged with a door member of a door opening of a room to remove and attach the lid member, wherein a gas for replacing an atmosphere of the substrate storage container is supplied between the substrates of the substrate storage container.
- a load port including: a nozzle portion having a nozzle for flowing out and Z or flowing in substantially parallel to the gap; and a drive portion for causing the nozzle portion to advance into the door opening.
- the nozzle unit includes: a first nozzle unit that flows out the gas; and a second nozzle unit that flows in the gas.
- the first nozzle unit and the second nozzle unit include: The substrate is disposed substantially symmetrically with respect to a center line of the substrate storage container along a transport direction in which the substrate is transported to the room.
- a third invention is characterized in that the nozzle port is formed so as to be located in a gap between the substrates.
- a fourth invention is characterized in that the nozzle openings are formed at predetermined intervals along a longitudinal direction of the substrate stored in the substrate storage container.
- a fifth invention is characterized in that a plurality of the nozzle openings are formed along a vertical direction with respect to the vertical direction.
- a sixth invention is characterized in that the thickness of the nozzle portion is at least twice the diameter of the nozzle port.
- the nozzle portion is housed outside a trajectory of the substrate when the substrate is transferred from the substrate storage container to the room, and rotates around a side end of the door opening as a rotation center. It is an arc-shaped member that turns.
- An eighth invention is characterized in that the driving section rotates the nozzle section around a side end of the door opening as a center of rotation, and advances the nozzle section from the side surface of the door opening section to the door opening section.
- a ninth invention is characterized in that the nozzle portion is a thin plate-like member that is housed in a housing portion that houses the lid member, and the nozzle port is formed on substantially the entire surface in accordance with a gap between the substrates. It shall be.
- a tenth aspect of the present invention is characterized in that the driving section causes the nozzle portion to advance into the door opening from near a lower end of the door opening.
- An eleventh invention is characterized in that the nozzle portion is a tubular member housed in a housing portion for housing the lid member.
- a twelfth invention is characterized in that the drive section causes the nozzle section to advance into the door opening from near the lower end of the door opening.
- the nozzle portion is housed near an upper end of the door opening, rotates about an upper end of the door opening as a center of rotation, and the nozzle opening is aligned with a gap between the substrates. It is a thin plate-like member formed on almost the entire surface.
- a fifteenth invention is characterized in that the driving section rotates the nozzle section around an upper end of the door opening as a center of rotation, and makes the nozzle section advance from the vicinity of an upper end of the door opening to the door opening. It shall be.
- a fifteenth invention is characterized in that the nozzle portion is a tubular member that is housed near an upper end of the door opening and that rotates around an upper end of the door opening as a center of rotation.
- a sixteenth invention is characterized in that the drive section rotates the nozzle section around an upper end of the door opening as a center of rotation, and advances the nozzle section from near the upper end of the door opening to the door opening. It shall be.
- the seventeenth invention is characterized in that it further includes an auxiliary nozzle portion provided near an upper end portion of the door opening, and configured to discharge the gas substantially downward to form an elongated planar airflow curtain. .
- the eighteenth invention is characterized in that it further includes a closed space forming portion which is airtightly connected to the container opening to form a closed space continuous with the internal space.
- a nineteenth invention is characterized in that the closed space forming part is configured such that the storage part, an upper cover member provided at a position facing an upper surface of the storage part, and the storage part is stored in the storage part. And an inner edge cover member that is formed along and is capable of moving back and forth from the storage section.
- the 20th invention is characterized by further comprising a flow control section for switching the flow of the gas in the nozzle section at a predetermined timing.
- a twenty-first invention is characterized in that the flow control unit is configured to detect a concentration of the gas in the atmosphere of the substrate storage container, a switching unit that switches the flow of the gas in the nozzle unit, and the detection unit And a switching control unit that switches the switching unit so that the concentration of the gas detected in step (b) is in a predetermined range indicating the degree of replacement of the atmosphere.
- the sealed space is formed, and in a state where the atmosphere of the substrate storage container is replaced by the nozzle portion, the pressure in the sealed space is higher than the outside air pressure. It is characterized by further including an exhaust adjusting unit for adjusting the amount of exhaust of the gas to the outside.
- the inner edge cover member is stored in the storage portion, and the atmosphere of the substrate storage container is replaced by the nozzle portion. It further includes a replacement control unit.
- the nozzle portion is housed in a housing portion housing the lid member, and the nozzle portion is arranged outside a locus of the substrate when the substrate is transferred from the substrate storage container to the room. It is a thin plate-shaped member.
- a twenty-fifth invention is characterized in that, when the inner edge cover member which can advance and retreat from the storage portion advances from the storage portion, the driving portion moves the nozzle portion from near the lower end of the door opening portion to the door opening portion. It is characterized in that
- a twenty-sixth invention is characterized in that the driving unit further includes a holding member capable of holding the nozzle portion advanced to the door opening at the advanced position.
- the nozzle portion is housed in a housing portion for housing the lid member, the nozzle opening is formed on substantially the entire surface in accordance with a gap between the substrates, and the substrate is provided in the substrate housing container.
- a first thin plate-shaped member arranged outside the trajectory of the substrate when transferred to the room, and a second thin plate-shaped member arranged near the center of the door opening. .
- the drive section is configured to cause the first thin plate-shaped member and the second thin plate-shaped member to independently advance from the vicinity of the lower end of the door opening to the door opening.
- the twentieth invention is characterized in that, after the horse movement part has advanced the first thin plate-shaped member and the second thin plate-shaped member into the door opening, the first thin plate-shaped member is moved to its advanced position. The second thin plate-shaped member is retracted from the door opening while being held.
- a gas for replacing the atmosphere of the substrate storage container flows out and / or flows in substantially parallel to the gap between the substrates from the nozzle port of the nozzle portion, and the nozzle portion is inserted into the door opening. Since the gas is made to advance, the gas efficiently flows into the gap between the substrates, and the time required for replacing the atmosphere in the substrate storage container can be reduced, and the atmosphere can be replaced with high accuracy. Can be.
- FIG. 1 is a perspective view showing a state where a wafer carrier is placed on a load port according to Embodiment 1 of the present invention and purging is being performed.
- FIG. 2 shows a state in which a wafer carrier is placed on the load port according to the first embodiment of the present invention and purged. It is a side view which shows the state which carried out.
- FIG. 3 is a side view showing a state where a wafer carrier is mounted on the load port according to the first embodiment of the present invention and purging is stopped.
- FIG. 4 is a cross-sectional view showing a state where a wafer carrier is placed on the load port according to the first embodiment of the present invention and purging is performed.
- FIG. 5A is a diagram showing a state where the first nozzle portion has advanced to the door opening.
- FIG. 5B is a diagram showing a state where the first nozzle unit has been retracted from the door opening.
- FIG. 6A is a diagram showing a state in which the first nozzle portion has advanced into the door opening and is facing the wafer stored in the wafer carrier.
- FIG. 6B is a sectional view of the first nozzle portion.
- FIG. 7 is a block diagram showing a load port according to the first embodiment of the present invention.
- FIG. 8 is a flowchart showing the operation of the load port according to the first embodiment of the present invention.
- FIG. 9 is a perspective view showing a state in which a wafer carrier is placed on the load port according to the second embodiment of the present invention and purging is being performed.
- FIG. 10 is a perspective view showing a state in which a wafer carrier is placed on a load port according to Embodiment 3 of the present invention and purging is performed.
- FIG. 11 is a perspective view showing a state in which a wafer carrier is placed on a load port according to Embodiment 4 of the present invention and purging is being performed.
- FIG. 12 is a side view showing a state where a wafer carrier is placed on a load port according to Embodiment 5 of the present invention and purging is being performed.
- FIG. 13 is a side view showing a state where the nozzle portion of the load port is held at the advanced position according to the fifth embodiment of the present invention.
- FIG. 14A is a side view showing a state where a wafer carrier is placed on a load port according to Embodiment 6 of the present invention and purging is being performed.
- FIG. 14B shows a state in which the first nozzle portion and the second nozzle portion of the mouth port according to the sixth embodiment of the present invention are held at the advanced position, and the third nozzle portion and the fourth nozzle portion are retracted from the door opening.
- FIG. 14A is a side view showing a state where a wafer carrier is placed on a load port according to Embodiment 6 of the present invention and purging is being performed.
- FIG. 14B shows a state in which the first nozzle portion and the second nozzle portion of the mouth port according to the sixth embodiment of the present invention are held at the advanced position, and the third nozzle portion and the fourth nozzle portion are retracted from the door opening.
- the load port 100 includes a wall surface 201 having a door opening 202 to which a door member (not shown) (not shown) is attached and detached. It is installed on the wall surface of a substrate processing apparatus (not shown).
- the wafer carrier 10 is a container for accommodating the wafers 1 at a predetermined interval (about 10 mm) inside the wafer carrier 10, and covers the carrier shell 11 and the container opening 12 of the carrier shell 11. And a carrier door 16 (see FIG. 3).
- wafer carriers are known as F ⁇ UP (Front Open Eng Uni F ied Pod) and FOSB (Front Oen Ing Shing Ping Box).
- the carrier shell 11 includes a curved inner wall 11 a (see FIG. 4) formed at a position facing the container opening 12. As shown in FIG. 2, the carrier shell 11 is provided at its upper portion with a robot flange 13 for being gripped by an automatic transfer device (not shown). The carrier shell 11 is provided with a V-shaped groove portion 15 having a V-shaped groove formed on a lower surface 14 thereof.
- the load port 100 is a device for engaging the carrier door 16 of the container opening 12 of the wafer carrier 10 with the load port door of the door opening 202 of the load port 100, and attaching and detaching the carrier door 16.
- a load port door opening / closing mechanism 170 (see FIG. 7) for opening and closing the load port door that is provided in the storage section 12 1 and engages with the carrier door 16, and a nozzle section 110 (see FIG. 1) ),
- the moving table 102 is provided with kinematic pins 103 for positioning the wafer carrier 10 and the like on the upper part thereof.
- the kinematic pins 103 are provided on the lower surface 14 of the carrier shell 11 described above. Engage with the V-shaped groove 15 provided.
- the nozzle section 110 has a first nozzle section 110-1 for discharging (or flowing) a purge gas for purging the atmosphere of the wafer carrier 10 and a purge gas flowing therethrough. (Or outflow) of the second nozzle portion 110-2.
- first nozzle section 110-1 and the second nozzle section 110-2 have substantially the same structure and function, the first nozzle section 110-1 and the second nozzle section 110-2 are hereinafter described. The explanation will focus on 1.
- the first nozzle section 1 1 0—1 has a nozzle port 1 1 1 through which a purge gas flows out substantially parallel to the gap A between the wafers 1 of the wafer carrier 10 (see FIG. 6). ) And so on.
- the first nozzle portion 110-1 is an arc-shaped member that rotates around the side end of the door opening 202 and rotates around the side edge thereof.
- the door can be moved forward and backward with respect to the door opening 202 by means of 16 6 (see FIG. 7) and the like.
- the first nozzle section 1 1 0—1 When the first nozzle section 1 1 0—1 is retracted from the door opening section 202, the first nozzle section 1 1 0—1 is composed of a wall 201, an outer wall 203 connected to the wall 201, and a force. It is stored in a clean space that is continuous with a closed space B described later. Therefore, the first nozzle section 110-1 is not contaminated.
- the first nozzle portion 1101-1 is used to transfer the wafer 1 to the substrate processing apparatus when the wafer 1 is transferred to the substrate processing apparatus. It is located outside the locus H of the outer peripheral edge.
- the mouth port 100 advances the first nozzle section 110-1 into the door opening section 202. Therefore, even when the atmosphere of the wafer carrier 10 is being purged, the wafer 1 can be processed in the basic apparatus by storing the side cover member 122 described later in the storage section 121. It can be transported in the air to perform a predetermined process, thereby improving work efficiency. Further, the first nozzle section 110-1 and the second nozzle section 110-2 correspond to the center of the wafer carrier 10 along the transfer direction in which the wafer 1 is transferred to the processing space in the substrate processing apparatus. They are arranged almost symmetrically with respect to the line G.
- the purge gas that has flowed out of the nozzle opening 1 1 1 of the first nozzle section 1 1 1-1 substantially in parallel with the gap A between the wafers 1 of the wafer carrier 10 is a curved surface formed on the carrier 11. After diffusing to the vicinity of the container opening 12 along the inner wall 11a of the shape, it flows into the second nozzle unit 110-2 arranged substantially symmetrically with respect to the center line G.
- the first nozzle section 1 1 0—1 has a pipe 1 1 2 at the bottom thereof that also serves as a rotating shaft for rotating the first nozzle section 1 1 0—1. And a support member 113 for supporting the rotating shaft via a bearing, and a pipe 122 penetrating therethrough, and an arm member 114 and the like formed in a crank shape.
- FIG. 5A is a diagram showing a state in which the first nozzle portion 110-1 has advanced to the door opening 202, and FIG. It is a figure showing the state evacuated from 02. Also, in the figure, the two-dot chain line indicates a part of the arm member 114 in which the nozzle port 111 is formed and which enters the door opening 202, and is not on the same plane. I have.
- One end of the pipe 112 is connected to a flow path switching section 163 such as a solenoid valve, through which a purge gas passes (see FIG. 7).
- the pipe 112 also serves as a rotary shaft, and is connected to the nozzle driving motor 166 via a connecting member (not shown).
- the pipe 112 penetrates the arm member 114, and a hole (not shown) for allowing the purge gas to flow into the first nozzle 110-1 is formed in the penetrated portion. Is formed.
- the purge gas that has passed through the inside of the pipe 111 passes through the inside of the arm member 114 through the hole, and flows out of the nozzle 11. As shown in FIG.
- the closed space forming portion 120 is airtightly connected to the container opening portion 12 to form a closed space B continuous with the internal space of the wafer carrier 10.
- a storage section 121 a side cover member 122, an upper cover member 123, and the like.
- the side cover member 122 is housed in the housing part 121, and is formed along the inner edge of the housing part 121.
- the side cover member 122 can be moved up and down from the storage part 122 by a lifting mechanism 124 driven by a side cover lifting motor 168 (see FIG. 7) described later. .
- the lifting mechanism 124 includes a shaft 125 disposed near the wall surface 201 and a plurality of pole slides 126 movably provided on the shaft 125.
- the shaft 125 penetrates a protrusion formed at the lower part of the side cover member 122.
- the pole slide 126 holds the side cover member 122 inside the protrusion, and includes an arm and the like connected to a belt mechanism (not shown) driven by a motor 168 for lifting and lowering the side cover.
- the belt mechanism can move up and down along the shaft 125.
- the upper force par member 123 is a cover provided near the upper end of the door opening 202 and opposed to the upper surface of the storage part 11.
- the side cover member 122 is raised from the storage portion 121 by the elevating mechanism 124, and the carrier door 16 is opened by the load port door opening and closing mechanism 170.
- the closed space B can be formed by the upper surface of the storage portion 121, the side cover member 122, and the upper cover member 123.
- a gap (about 1 mm) is formed between the side cover member 122 and the upper cover member 123.
- a gap (about 0.5 to l mm) is formed between the carrier shell 11 and the wall surface 201.
- the exhaust adjustment section 130 includes an exhaust port whose opening area is adjusted by a micromotor (not shown) or the like.
- the closed space B is formed in the exhaust adjustment unit 130, and the pressure in the closed space B is increased when the atmosphere of the carrier 10 is purged by the first nozzle unit 110-11. Adjust the opening area of the exhaust port so that the pressure becomes higher than the external pressure of the exhaust gas, and adjust the exhaust amount of the purge gas.
- the exhaust gas adjusting section 130 allows the purge gas to flow at a rate of 10 OL / min from the nozzle port 1 11 of the first nozzle section 110-1 in a direction substantially parallel to the gap A between the ueno and 1.
- the gap between the side cover member 122 and the upper cover member 123, the carrier shell 111 and the wall surface 201 The opening area of the exhaust port is adjusted such that the purge gas of less than 40 LZmin flows out of the closed space B from the gap between the exhaust gas and the exhaust adjusting section 130.
- the exhaust adjustment section 130 can increase the pressure in the sealed space B higher than the external pressure, so that the gap between the side cover member 122 and the upper cover member 123, the carrier shell 111 and the wall surface Air and the like can be reliably prevented from entering the closed space B from the gap between the airtight member 201 and the space 201.
- the auxiliary nozzle portion 140 is provided inside the upper cover member 123, and allows the purge gas to flow substantially downward to form an elongated planar air curtain.
- the purge gas flowing out of the nozzle port 111 of the first nozzle portion 1101-1 flows to the rear of the first nozzle portion 1101-1 (the processing space side in the substrate processing apparatus). Can be prevented, so that the purging efficiency does not decrease.
- FIG. 6A is a diagram showing a state in which the first nozzle unit 110-1 has advanced to the door opening 202 and faces the wafer 1 stored in the wafer carrier 10.
- 6B is a sectional view of the first nozzle unit 110-1.
- the nozzle openings 1 1 1 1 are formed at predetermined intervals so as to be located in the gap A between the wafers 1 stored in the wafer carrier 10.
- the purge gas can be made to flow substantially parallel and uniformly.
- a plurality of nozzle ports 111 are formed at predetermined intervals along a substantially oblique direction with respect to the direction (vertical direction) in which the plurality of wafers 1 are housed in the wafer carrier 10. For this reason, the nozzle port 1 1 1 can make the diffusion range of the purge gas different, and even if the nozzle port 1 1 1 is formed in a narrow range, the purge gas is diffused in a wide range. be able to.
- the nozzle port 1 1 1 1 1 has a thickness Y of the first nozzle section 110-1 as shown in FIG. It is formed to be at least twice (for example, three times) the diameter X of 1 1 1.
- the purge gas can be efficiently discharged into the gap A between the wafers 1, so that the consumption of the purge gas is reduced and the cost required for the purge is reduced. be able to.
- the mouth port 100 is provided with a flow path switching unit 163, an oxygen concentration sensor 1664, a storage unit 1659, a first nozzle unit 110-1 and a first nozzle unit.
- Nozzle section 110 composed of 2 nozzle sections 1 1 0-2, nozzle driving motor 1 66, driver circuit 1 67, side cover member 1 2 2, side cover up / down motor And a driver circuit 1669, a load port door opening / closing mechanism 170, and the like, and these members are electrically connected via a control unit 160.
- the flow path switching section 16 3 is an electromagnetic valve or the like for switching the flow path of the purge gas, and is a supply pump 16 for supplying the purge gas from a tank (not shown) for the purge gas through the pipe 112 or the like. 1 and a suction bon to suck the purge gas and transport the purge gas to a tank (not shown) Connected to the nozzle 16 1 and the nozzle section 110.
- FIG. 7 the operation when the mouthboard 100 performs the purge will be described with reference to FIGS. 7 and 8, focusing on the control unit 160.
- FIG. 7 the operation when the mouthboard 100 performs the purge will be described with reference to FIGS. 7 and 8, focusing on the control unit 160.
- control unit 160 outputs a signal D3 to the motor 168 for lifting and lowering the side cover (S101).
- the side cover lifting / lowering motor 168 is connected to the control unit 160 via the driver circuit 169.
- the control unit 160 outputs the signal D3, the lifting / lowering mechanism 1 2 4 Is driven to raise the side cover member 1 2 2 stored in the storage section 1 2 1.
- the control unit 160 outputs a signal E1 to the load boat door opening / closing mechanism 170 (S102).
- the load port door opening / closing mechanism 170 engages the load port door of the door opening 202 with the carrier door 16 and the carrier door. Remove 1 6 from container opening 1 2. For this reason, a closed space B connected to the internal space of the wafer carrier 10 is formed.
- the control unit 160 outputs a signal D1 to the nozzle driving mode 1666 (S103).
- the nozzle driving motor 166 is connected to the control unit 160 via a driver circuit 167.
- the control unit 160 outputs a signal D1
- the first nozzle unit 1 1 The first nozzle 1 1 0—1 is rotated from the side of the door opening 202 by rotating the pipe 1 1 2 that also serves as the rotating shaft provided at the lower part of 0—1 to the door opening 202. Let me advance.
- the control section 160 outputs the signal F1 to the flow path switching section 163 (S104).
- the flow path switching section 16 3 communicates the supply pump 16 1 with the first nozzle section 1 1 0-1, and the suction pump 16 2 and the second nozzle section 1 1 0-2. For this reason, the purge gas flows out of the first nozzle section 110-1 and flows into the second nozzle section 110-2.
- the control section 160 reads the detection signal C detected by the oxygen concentration sensor 164 (S105).
- the oxygen concentration sensor 16 4 detects the oxygen concentration in the atmosphere of the wafer carrier 10. It is a sensor and outputs a detection signal C obtained by AZD-converting a signal corresponding to the detected oxygen concentration.
- the oxygen concentration is an index indicating the degree of purge of the atmosphere of the wafer carrier 10.
- the oxygen concentration is preferably in the range of 0 :! to 1.0%, and at this time, the degree of purge is in an optimum state.
- the oxygen concentration sensor 164 is, for example, have use titania (T i 0 2) as a device material, Ru titania oxygen sensor or the like der utilizing change in electric resistance due to oxidation-reduction of the titania.
- the reason for detecting the oxygen concentration instead of the nitrogen concentration in step S105 is that the oxygen concentration sensor is less expensive than the nitrogen concentration sensor.
- the control unit 160 reads the threshold signal C1 for switching the flow of the purge gas stored in advance in the storage unit 165, and determines whether the detection signal C obtained in step S105 is equal to or less than the threshold signal C1. Is determined (S106).
- the storage unit 165 is a non-volatile memory, and stores in advance a predetermined range of oxygen concentration (for example, 0.1 to L. 0%) indicating an optimal state of the purge degree.
- the storage unit 165 stores an oxygen concentration (for example, 1.0%) serving as a threshold for switching the flow of the purge gas as a threshold signal C1.
- the control unit 160 determines that the purging is sufficient, and outputs a signal D2 to the nozzle driving motor 166 (S110).
- the nozzle drive motor 166 drives the pipe 112 also serving as a rotating shaft to rotate in the opposite direction to the direction in which the signal D1 was output, and the first nozzle unit 110- 1 is retracted to the side of the door opening 202.
- the control unit 160 determines that the purging is insufficient, and outputs the signal F2 to the flow path switching unit 163 (S107).
- the flow path switching unit 163 communicates the P feeding pump 162 with the first nozzle unit 110-1, and supplies the supply pump 161 and the second nozzle unit 110-1. — Communicate with 2. Therefore, the purge gas flows out of the second nozzle section 110-2 and flows into the first nozzle section 110-1.
- the control unit 160 reads the above-described threshold signal C1 from the storage unit 165, and It is determined whether or not the detection signal C obtained in S108 is equal to or smaller than the threshold signal C1 (S109).
- the control unit 1660 determines that the purging is sufficient, proceeds to step S110 described above, and sends a signal to the nozzle driving motor 1666. Output D2.
- the control unit 160 determines that the purging is insufficient, returns to step S104 again, and returns to step S104. Output the signal F 1. That is, the control section 160 controls the flow of the purge gas to be switched until the detection signal C becomes equal to or less than the threshold signal C1 and the purging is sufficiently performed.
- the control unit 160 transmits a signal D4 to the side cover lifting motor 168. Output (S111).
- the control unit 1660 rotates in the opposite direction to the direction when the signal D3 was output, and drives the lifting mechanism 1 2 4
- the side cover members 1 2 2 are stored in the storage section 1 2 1.
- the closed space B is opened, and the internal space of the wafer carrier 10 and the processing space in the substrate processing apparatus become continuous.
- the wafer 1 is transferred to the processing space by the wafer transfer port pot of the substrate processing apparatus, and after predetermined processing is performed, is stored in the wafer carrier 10 again. Further, in the wafer carrier 10, when the processing of a predetermined wafer 1 is completed, the carrier door 16 is closed by the open / close port mechanism 170.
- the load port 100 allows the purge gas to efficiently flow into the gap A between the wafers 1, so that the time required for purging the atmosphere of the wafer 100 can be shortened and the flow rate of the purge gas can be reduced. Also, a predetermined purge can be performed.
- the nozzle portion 110 can freely advance and retreat to the door opening portion 202, for example, the distance between the wall surface 201 and the end face of the storage portion 121 on the processing space side is reduced. Yes, so-called SE Can comply with MI standards.
- the load port 100 switches the flow of the purge gas in accordance with the oxygen concentration until the purge degree of the atmosphere of the wafer carrier 10 becomes optimal.
- the curved inner wall of the wafer carrier 10 Atmosphere gas that has accumulated around 1a can be discharged to the vicinity of the nozzle 110, and this atmosphere gas can flow into the nozzle 110, and purging can be performed accurately. .
- the load port 100OA differs from the load port 100 in that a nozzle unit 110A is provided instead of the nozzle unit 110.
- the nozzle portion 11OA is a thin plate-like member stored in the storage portion 121A.
- the nozzle portion 11 O A has a nozzle port formed on substantially the entire surface in accordance with the gap between the wafers 1.
- the nozzle opening of the nozzle portion 11 OA is formed in a grid at predetermined intervals in the nozzle portion 11 OA, and the diameter thereof is 1/2 or less of the thickness of the nozzle portion 11 OA (for example, 1/3 ).
- the nozzle portion 11OA is a thin plate-shaped member, it does not interfere with the load port door opening / closing mechanism 170 provided in the storage portion 121A, and can be provided with an appropriate nozzle portion using a belt-pole screw or the like. It can be lifted from the storage section 121 A by the lifting mechanism.
- the load port 100 A drives the nozzle lifting mechanism by the nozzle driving motor 166 to move the nozzle 11 OA to the storage section 12 near the lower end of the door opening 202. It can be raised from 1 A and advanced into the door opening 202.
- the nozzle port of the nozzle section 11 OA is formed in a grid pattern on substantially the entire surface in accordance with the gap A between the wafers 1, the purge gas flows out from almost the entire surface of the first nozzle section 11 OA-1. Do At the same time, it flows into almost the entire surface of the second nozzle portion 11 OA-2.
- the load port 100A can perform purging more efficiently, and can reduce the time required for purging.
- the load port 100B differs from the load port 100 in that a nozzle portion 110B is provided instead of the nozzle portion 110 as shown in FIG.
- the nozzle 110B is a tubular member housed in the housing 121B.
- the nozzle portion 110B has a nozzle port formed so as to be located in the gap A between the wafers 1.
- the nozzle openings of the nozzle portion 110B are formed at predetermined intervals in the longitudinal direction, and have a diameter of 1Z2 or less (for example, 1/3) of the thickness of the nozzle portion 110B (see FIG. 6).
- a pipe through which a purge gas passes may be connected to a lower portion of the nozzle portion 110B.
- a nozzle portion 110 as shown in FIG. A mechanism for rotating is not required.
- the opening port 100B can simplify the mechanism provided below the nozzle portion 110B, and furthermore, the nozzle driving motor 166 provides a similar nozzle portion lifting / lowering mechanism as the load port 100A.
- the nozzle portion 110B can be raised from the storage portion 121B near the lower end of the door opening 202 and advanced to the door opening 202.
- the load port 100C differs from the load port 100 in that a nozzle 110C is provided instead of the nozzle 110.
- the nozzle portion 110C includes a first nozzle portion 110C-1 which is a tubular member, a second nozzle portion 110C-2, and the like, and an upper cover provided near the upper end of the door opening 202, respectively. It is staggered in one member 123A.
- the nozzle portion 110C has a nozzle port formed so as to be located in the gap A between the wafers 1.
- the nozzle opening of this nozzle part 110C The nozzles are formed in the longitudinal direction at intervals and have a diameter of 1 to 2 or less (for example, 1 ⁇ 3) of the thickness of the nozzle portion 110C (see FIG. 6).
- the open port 100C includes an appropriate nozzle unit rotation mechanism near the upper end of the door opening 202 for rotating the nozzle unit 110C around the upper end of the door opening 202 as a center of rotation.
- the load port 100C does not need to provide a nozzle unit elevating mechanism in the storage unit 121, so that the mechanism of the storage unit 121 can be simplified.
- the nozzle unit rotation mechanism is driven by the nozzle driving motor 166, The nozzle 110C can be rotated around the upper end of the door opening 202 as a center of rotation, and can be advanced into the door opening 202 from near the upper end of the door opening 202.
- the load port 100D differs from the load port 100 in that a nozzle portion 110D is provided instead of the nozzle portion 110, as shown in FIGS.
- the nozzle part 110D is a thin plate-like member stored in the storage part 121C.
- the nozzle portion 110D is arranged outside the locus H (see FIG. 4) of the outer peripheral edge of the wafer 1 when the wafer 1 is transferred from the wafer carrier 10 to the substrate processing apparatus.
- the nozzle portion 110D has a nozzle port formed so as to be located in the gap A between the wafers 1.
- the nozzle openings of the nozzle portion 110D are formed at predetermined intervals in the longitudinal direction, and the diameter thereof is equal to or less than 1/2 (for example, 1/3) of the thickness of the nozzle portion 110D (see FIG. 6).
- the load port 1 • 0D has a nozzle unit elevating and lowering holding mechanism 127 for allowing the nozzle unit 110D to advance from the storage unit 121C to the door opening 202 and holding the nozzle unit 110D at the advanced position.
- the nozzle unit elevating and lowering holding mechanism 127 is capable of holding the nozzle unit 110D at the advanced position when the nozzle unit 110D advances into the door opening 202, and the slide member 128 formed below the nozzle unit 110D.
- a holding member 129 and the like are provided.
- the slide member 128 It is placed on a protrusion formed at the lower part of the side cover member 122, and a pole slide or the like is provided inside the protrusion.
- the slide member 128 has a concave portion 128 a on a side surface facing the holding member 129.
- the holding member 129 includes a holding pin 129a for engaging with the recess 128a, and the holding pin 129a can move toward and away from the recess 128a.
- the nozzle portion 110D advances from the storage portion 121C to the door opening portion 202 in conjunction with the movement of the elevating mechanism 124 by the slide member 128. Thereafter, as shown in FIG. 13, the nozzle 110D moves the holding pin 129a of the holding member 129 toward the recess 128a of the slide 128, and the holding pin 129a engages with the recess 128a.
- the nozzle portion 110D is retracted from the door opening 202 by the elevating operation of the elevating mechanism 124 described above by retracting from the holding pin 129a force S recess 128a and stored in the storage portion 121C. .
- the nozzle portion 110D is advanced to the door opening 202, and further, the nozzle portion 110D is located outside the locus H of the outer peripheral edge of the wafer 1.
- the wafer 1 is transferred to the processing space by the wafer transfer port pot of the substrate processing apparatus, and is subjected to a predetermined process, and the wafer carrier 10 can be purged, thereby improving work efficiency. Can be done.
- the load port 100D does not need to provide a rotation mechanism for rotating the nozzle 110 in the storage section 121 unlike the load port 100, and further includes a nozzle lifting / lowering holding mechanism 127 using the lifting / lowering mechanism 124. Therefore, the mechanism of the storage section 121 can be further simplified.
- the load port 100E is different from the load port 10OA in FIG. 9 in that a nozzle 110E is provided instead of the nozzle 11OA as shown in FIGS. 14A and 14B.
- the nozzle section 110E includes a first nozzle section 110E-1 and a second nozzle section 110E-2. It is a thin plate-like member that includes a three nozzle part 110E-3, a fourth nozzle part 110E-4, and the like, and can be stored in the storage part 121D.
- the first nozzle portion 110E-1 and the second nozzle portion 110E-2 are disposed near the side end of the door opening 202, and have widths of the third nozzle portion 110E-3 and the fourth nozzle portion 110E-4. (For example, the width ratio is about 3: 7).
- the nozzle 1 is transported from the wafer carrier 10 to the substrate processing apparatus. It is located outside the trajectory H (see Fig. 4) of the outer peripheral edge of c1.
- the third nozzle portion 110E-13 and the fourth nozzle portion 110E-4 are arranged near the center of the door opening 202.
- the load port 100E is used to raise the first nozzle section 110E-1, the second nozzle section 110E-2, the third nozzle section 110E-3, and the fourth nozzle section 110E-4 from the storage section 121D.
- a not-shown nozzle elevation mechanism (described later) is provided.
- the nozzle units 110E are each a thin plate-shaped member, the nozzle units 110E can be independently moved near the lower end of the door opening 202 without interfering with the load port door opening / closing mechanism 170. Can be raised from the storage section 121D and advanced to the door opening 202.
- the nozzle portion 110E has a nozzle port formed on substantially the entire surface in accordance with the gap A between the wafers 1.
- the nozzle openings of the nozzle portion 110E are formed in a grid pattern at predetermined intervals in the nozzle portion 110E, and the diameter thereof is 1 to 2 or less (for example, 1/3) of the thickness of the nozzle portion 110E.
- the purge gas is supplied to the first nozzle portion 110E-1 and the third nozzle portion 110E-3. And flows into substantially the entire surface of the second nozzle portion 110E-2 and the fourth nozzle portion 110E-14. For this reason, the open port 100E can perform purging more efficiently, and can reduce the time required for purging.
- the nozzle elevating mechanism of the load port 100E will be described.
- the nozzle unit elevating mechanism includes one motor that directly drives the third nozzle unit 110E-3 and the fourth nozzle unit 110E-4, and the third nozzle unit 110E-3 and the fourth nozzle unit 110E-4 and the first nozzle unit.
- a nozzle engaging pin (not shown) for engaging the nozzle portion 110E-1 and the second nozzle portion 110E-2, and a side cover covering the third nozzle portion 110E-3 and the fourth nozzle portion 110E-4.
- a side cover member engaging pin (not shown) for engaging the member 122 is provided.
- the nozzle part elevating mechanism advances the nozzle part engaging pin and the side cover member engaging pin to form the third nozzle part 110E-3, the fourth nozzle part 110E-4, and the first nozzle part 110E—
- the first and second nozzle portions 110E-2 are engaged with each other, and the third nozzle portion 110E-3 and the fourth nozzle portion 110E-4 are engaged with the side cover member 122.
- the nozzle unit elevating mechanism moves the first nozzle unit 110E-1 and the second nozzle unit 110E-2 together with the third nozzle unit 110E-3 and the fourth nozzle unit 110E-4 to the door opening.
- the height is raised to 202, and the side cover member 122 is raised from the storage section 11D.
- the first to fourth nozzle portions 110E—1 to 4 rise to the door opening 202, and the side cover member 122 rises from the storage portion 121D to fill the closed space B as shown in FIG. 14A.
- the atmosphere of the wafer carrier 10 is purged.
- the load port 100E is connected to the third nozzle unit by the nozzle unit elevating mechanism as shown in FIG. 14B.
- the side cover member 122 is stored in the storage portion 121D together with 110E-3 and the nozzle portion 110E-4.
- the load port 100E retracts the nozzle engaging pin of the nozzle elevating mechanism, and holds the holding pin 129a and the recess 128a of the nozzle elevating and holding mechanism 127 (see FIGS. 12 and 13).
- the first nozzle section 110E-11 and the second nozzle section 110E-2 are held at the advanced positions by the same mechanism as described above. For this reason, the mouth port 100E connects the first nozzle section 110E-1 and the second nozzle section 110E during the transfer of the wafer 1. Purging can be performed with E-2.
- the load boat 100E retracts the side cover member engaging pin of the nozzle unit elevating mechanism, and the third nozzle unit 110E-3 and the fourth nozzle
- the chimney 110E-4 is raised to the door opening 202, and purging is again performed by the first to fourth nozzles 110E-1 to 4E as shown in FIG. 14A.
- the opening port 100E is connected to the third nozzle section 110E-3 and the fourth nozzle section by the nozzle section elevating mechanism.
- 110 E-4 is stored in storage section 121D. Therefore, according to the load boat 100E, even if the wafer 1 is being transferred, the purge can be performed by the first nozzle unit 110E-1 and the second nozzle unit 110E-2. The working efficiency can be improved as compared with the load port 100 A that is provided.
- the load port 100E can raise and lower the third nozzle portion 110E-3 and the fourth nozzle portion 110E-4 according to the loading and unloading of each wafer 1; Compared to 100, 100B, 100C, and 100D, it is possible to prevent the purge state from being reduced during operation.
- the load port 100E advances the nozzle engaging pins of the nozzle elevating mechanism, and the third nozzle 110E — Engage the 3rd and 4th nozzles 110E-4 with the 1st nozzle 110E-1 and the 2nd nozzle 1 10E-2, and use the same mechanism as the nozzle unit elevating and holding mechanism 127.
- Section 110E-1 and the second nozzle section 1 10E-2 are retracted from their advanced positions, and together with the third nozzle section 110E-3 and the fourth nozzle section 1 10E-4, the first nozzle section 110E-
- the first and second nozzle sections 110E-2 are stored in the storage section 121D.
- the carrier door 16 is closed by the mouth door opening / closing mechanism 170 of the carrier 10.
- the nozzle section 11 OA is housed in the housing section 121 A, but is not limited to this, and is not limited to the upper cover member 123 provided near the upper end of the door opening 202.
- the door openings 202 may be housed differently, and may be rotatable around the upper end of the door opening 202. With this configuration, it is not necessary to provide a nozzle unit elevating mechanism in the storage section 121A, so that the mechanism of the storage section 121A can be simplified.
- the present invention is not limited to this, and a cam is provided that is displaced in conjunction with the upward movement of the side cover member 122 from the storage portion 121, and the movement of this cam causes the first nozzle portion 110-1 to advance into the door opening 202.
- a mechanism may be provided to cause this.
- the side cover member 122 is raised by one motor (for example, the side cover lifting / lowering motor 168), and the first nozzle 110-1 is advanced to the door opening 202.
- one motor for example, the side cover lifting / lowering motor 168
- the control unit 160 retreats the nozzle unit 110 from the door opening 202 after purging the atmosphere of the wafer carrier 10 in a state where the closed space B is formed (S 11
- the wafer 1 is transferred to the processing space in the substrate processing apparatus.
- Step S110 Since it is located outside the locus H of the outer peripheral end of Step 1, the operation of Step S110 may not be performed.
- the nozzle portion 110, 110B, 110C, 110D is advanced to the door opening 202, and the side force is applied.
- the wafer 1 is transferred to the processing space by the wafer transfer port pot of the substrate processing apparatus, and predetermined processing is performed. Since purging can be performed, work efficiency can be improved.
- the oxygen concentration sensor 164 was used at the open port 100, but if it is an index indicating the degree of purge of the atmosphere of the wafer carrier 100, the ratio, concentration, etc. of the purge gas are detected.
- An appropriate sensor such as a nitrogen sensor may be used.
- the control unit 160 switches the flow path switching unit 163 according to the detection signal C detected by the oxygen concentration sensor 164, but this is not a limitation.
- the flow switching unit 163 may be switched at the timing.
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Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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JP2006514648A JP4585514B2 (ja) | 2004-06-21 | 2004-06-21 | ロードポート |
US11/630,123 US20090169342A1 (en) | 2004-06-21 | 2004-06-21 | Load port |
EP04746510A EP1780785A4 (en) | 2004-06-21 | 2004-06-21 | LOADING PORT |
PCT/JP2004/009041 WO2005124853A1 (ja) | 2004-06-21 | 2004-06-21 | ロードポート |
TW093119461A TW200601482A (en) | 2004-06-21 | 2004-06-30 | Load port |
US13/364,789 US9010384B2 (en) | 2004-06-21 | 2012-02-02 | Load port |
Applications Claiming Priority (1)
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PCT/JP2004/009041 WO2005124853A1 (ja) | 2004-06-21 | 2004-06-21 | ロードポート |
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US13/364,789 Continuation-In-Part US9010384B2 (en) | 2004-06-21 | 2012-02-02 | Load port |
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EP (1) | EP1780785A4 (ja) |
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WO (1) | WO2005124853A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
EP1780785A4 (en) | 2009-04-01 |
JP4585514B2 (ja) | 2010-11-24 |
EP1780785A1 (en) | 2007-05-02 |
JPWO2005124853A1 (ja) | 2008-04-17 |
US20090169342A1 (en) | 2009-07-02 |
TW200601482A (en) | 2006-01-01 |
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