WO2005008769A1 - 搬送装置及び駆動機構 - Google Patents
搬送装置及び駆動機構 Download PDFInfo
- Publication number
- WO2005008769A1 WO2005008769A1 PCT/JP2004/010178 JP2004010178W WO2005008769A1 WO 2005008769 A1 WO2005008769 A1 WO 2005008769A1 JP 2004010178 W JP2004010178 W JP 2004010178W WO 2005008769 A1 WO2005008769 A1 WO 2005008769A1
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- WIPO (PCT)
- Prior art keywords
- arm
- link
- drive
- base
- light
- Prior art date
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Classifications
-
- 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
- H01L21/67739—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 into and out of processing chamber
- H01L21/67742—Mechanical parts of transfer devices
-
- 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
- H01L21/68—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 positioning, orientation or alignment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J13/00—Controls for manipulators
- B25J13/08—Controls for manipulators by means of sensing devices, e.g. viewing or touching devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/02—Programme-controlled manipulators characterised by movement of the arms, e.g. cartesian coordinate type
- B25J9/04—Programme-controlled manipulators characterised by movement of the arms, e.g. cartesian coordinate type by rotating at least one arm, excluding the head movement itself, e.g. cylindrical coordinate type or polar coordinate type
- B25J9/041—Cylindrical coordinate type
- B25J9/042—Cylindrical coordinate type comprising an articulated arm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/06—Programme-controlled manipulators characterised by multi-articulated arms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/10—Programme-controlled manipulators characterised by positioning means for manipulator elements
- B25J9/106—Programme-controlled manipulators characterised by positioning means for manipulator elements with articulated links
- B25J9/1065—Programme-controlled manipulators characterised by positioning means for manipulator elements with articulated links with parallelograms
- B25J9/107—Programme-controlled manipulators characterised by positioning means for manipulator elements with articulated links with parallelograms of the froglegs type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/687—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
- H01L21/68707—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a robot blade, or gripped by a gripper for conveyance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/20—Control lever and linkage systems
- Y10T74/20207—Multiple controlling elements for single controlled element
- Y10T74/20305—Robotic arm
Definitions
- the present invention relates to a transfer device and a drive mechanism, and more particularly to a transfer device and a drive mechanism used in a semiconductor processing system.
- semiconductor processing refers to a semiconductor layer formed on a substrate to be processed such as a wafer, a glass substrate for an LCD (Liquid Crystalline Display) or an FPD (Flat Panel Display).
- LCD Liquid Crystalline Display
- FPD Flat Panel Display
- a substrate to be processed such as a semiconductor wafer is transferred.
- a substrate to be processed such as a semiconductor wafer is transferred.
- a substrate to be processed such as a semiconductor wafer is transferred.
- Transported into the processing chamber Conversely, conversely, it is taken out of the processing room and carried out to a predetermined place.
- a transport device for transporting a semiconductor wafer is disclosed in, for example, Patent Documents 1 to 4 below.
- FIG. 33 is a perspective view showing an example of a conventional transport device of the type disclosed in Patent Literatures 1 and 3 and a
- the transfer device 2 is formed by connecting a base arm 4 and an intermediate arm 6 so as to be able to bend and extend.
- the pick 10 is pivotally attached to the tip of the arm 8. Pick section at both ends of pick 10
- the motor source 1 2 for driving the transfer device 2 has two motors.
- the first motor rotates the entire arm 8 and directs it in a desired direction as described above.
- the second motor causes the arm 8 to bend and extend as described above.
- the semiconductor wafers w in the processing chamber can be exchanged in the following manner. That is, first, one pick of the pick arm 10, for example, the pick portion 10 A is made empty, and the unprocessed wafer W is held by the other pick portion 10 B. Next, by bending the arm 8, first, the processed wafer W is taken out from the processing chamber. Here, the empty pick 1OA is advanced toward the processing chamber, and the wafer W processed by the empty pick 1OA is received. Then, the pixel portion 10A is retracted, and the processed wafer W is taken out from the processing chamber.
- the VP is sent to the server.
- Three motors are used as the drive source, and the whole apparatus turns and the pick-up / retreat operation of each pick is performed.
- Patent Document 1 U.S. Pat. No. 5,899,658
- Patent Document 2 Japanese Patent Application Laid-Open No. 2000-72228
- Patent Document 3 Japanese Patent Application Laid-Open No. 7-142425
- Patent Document 4 Japanese Patent Application Laid-Open No. H10-16632966
- the transfer device shown in FIG. 33 and Patent Documents 1 and 3 has the following problems. That is, the pick arm 10 must be turned 180 degrees in order to perform the operation of replacing the processed wafer with the unprocessed wafer in the processing chamber.
- a large turning angle is a loss of time and cannot be replaced quickly.
- the weight increases, so that the turning speed cannot be increased.
- the wafer is always held by one of the picks, so that the operation speed of the arm 8 cannot be increased much.
- the transfer device disclosed in Patent Document 2 and the disclosure three motors are required as a drive source, and accordingly, the device cost increases accordingly.
- An object of the present invention is to replace a substrate to be processed with a basic
- An object of the present invention is to provide a transfer device that requires a small turning angle.
- Another object of the present invention is to provide a transfer apparatus capable of reducing the number of motors serving as a driving source, thereby reducing the cost of the apparatus and reducing the overall weight.
- Still another object of the present invention is to provide a driving mechanism capable of detecting a relative positional relationship between a plurality of driving shafts without using an encoder or the like.
- a transfer apparatus for a substrate to be processed, a rotatable rotating base,
- the bendable first and second arm mechanisms attached to the rotating base, and the first and second arm mechanisms, respectively, are pivotally connected to each other sequentially from the rotating base side.
- a link mechanism coupled to the base arm of the first and second arm mechanisms so as to drive the first and second arm mechanisms
- a first drive source that rotationally drives the rotating base
- a second drive source for driving the link mechanism so as to bend and stretch the first and second arm mechanisms
- a second aspect of the present invention is a driving mechanism having a function of detecting a rotational position
- Inner and outer drive shafts in the form of hollow pipes rotatable with each other coaxially;
- a plurality of drive sources coupled to each of the ⁇ -side and outer drive shafts;
- a reflecting member for reflecting light passing through the light passage window along the axial direction of the inner drive shaft
- a light receiving unit that receives light reflected by the reflecting member
- a position detecting unit for obtaining a positional relationship between the inner and outer drive shafts in the rotation direction based on the output of the light receiving unit
- the driving mechanism of the second viewpoint can be incorporated as a driving mechanism of the transport device of the first viewpoint.
- FIG. 1 is a plan view showing a state in which both arm mechanisms are contracted in a transport device according to a first embodiment of the present invention.
- FIG. 2 is a plan view showing a state in which one arm mechanism is extended in the transfer device shown in FIG.
- FIG. 3 is a cross-sectional view showing the transfer device shown in FIG.
- FIG. 4 is a cross-sectional view showing the internal structure of the rotating base of the transfer device shown in FIG.
- FIG. 5 is a perspective view showing a state in which both arm mechanisms are contracted in the transfer device according to the second embodiment of the present invention.
- FIG. 6 is a plan view showing a state in which one arm mechanism is extended in the transfer device shown in FIG.
- FIG. 7 is a partial cross-sectional view showing the transfer device shown in FIG.
- 8A to 8D are diagrams schematically showing a series of operation states of the transfer device shown in FIG.
- FIG. 9 is a plan view showing a state in which both arm mechanisms are contracted in the transfer device according to the third embodiment of the present invention.
- FIG. 10 is a plan view showing a state where one arm mechanism is extended in the transfer device shown in FIG. 9;
- FIG. 11 is a partial cross-sectional view mainly showing a link mechanism of the transfer device shown in FIG. 9;
- FIG. 12 is a plan view showing a state in which both arm mechanisms are contracted in the transfer device according to the fourth embodiment of the present invention.
- FIG. 13 is a side view showing the transfer device shown in FIG.
- FIG. 14 is a plan view showing a state in which one arm mechanism is extended in the transfer device shown in FIG.
- FIG. 15 is a plan view showing a state in which one arm mechanism is extended in the transfer device according to the fifth embodiment of the present invention.
- FIG. 16 is a partial cross-sectional view for explaining a connection state between a linear motor used as a second drive source and a link mechanism in the transfer device shown in FIG.
- FIG. 17 is a plan view showing a state in which both arm mechanisms are contracted in the transfer device according to the sixth embodiment of the present invention.
- FIG. 18 is a plan view showing a state where one arm mechanism is extended in the transfer device shown in FIG. 17.
- FIG. 19 is a partial cross-sectional view showing the transfer device shown in FIG.
- Figure 2OA through Figure 20G show a series of movements of the transfer device shown in Figure 17.
- the figure which shows a working state typically.
- FIG. 21 is a plan view showing a state in which both arm mechanisms are contracted in the transfer device according to the seventh embodiment of the present invention.
- FIG. 22 is a plan view showing a state in which both arm mechanisms are contracted in the transfer device according to the eighth embodiment of the present invention.
- FIG. 23 is a perspective view showing a state in which one arm mechanism is extended in the transfer device shown in FIG. 22.
- 24A to 24E are diagrams schematically showing a series of operation states of the transfer device shown in FIG.
- FIG. 25 is a graph showing the results of a comparative experiment of the devices according to the seventh and eighth embodiments formed with the same specifications except for the link mechanism.
- FIG. 26 is an enlarged sectional view showing a drive mechanism according to the embodiment of the present invention.
- FIG. 27 is an explanatory diagram for explaining a positional relationship between a detection pattern, which is a main part of the drive mechanism shown in FIG. 26, and a reflection member.
- FIG. 28 is a plan view showing a state where the detection pattern shown in FIG. 27 is linearly developed.
- FIG. 29 is a perspective view showing a formed by using the entire outer drive shaft as a detection pattern.
- FIG. 30 is a developed view showing a detection pattern of a technician using the detection structure as a position sensor.
- FIG. 31 is an enlarged sectional view showing a modified example of the drive mechanism shown in FIG. 26.
- Fig. 32A to Fig. 32D are planes showing the example of the detection pattern used in the drive mechanism shown in Fig. 31 when it is developed linearly.
- FIG. 32A to Fig. 32D are planes showing the example of the detection pattern used in the drive mechanism shown in Fig. 31 when it is developed linearly.
- FIG. 33 is a perspective view showing an example of a conventional transport device.
- FIG. 1 is a plan view showing a state in which both arm mechanisms are contracted in the transfer device according to the first embodiment of the present invention.
- FIG. 3 is a cross-sectional view showing the transfer device shown in FIG.
- the transfer device 20 includes a rotating base 24 rotatably supported by a base 22 (see FIG. 3).
- a pair of arm mechanisms that is, a first arm mechanism 26 and a second arm mechanism 28 are supported on the rotating base 24 so as to be capable of turning and bending.
- a link mechanism 30 is provided to selectively bend and extend the first and second arm mechanisms 26, 28.
- the first drive source 3 In order to rotate the rotating base 24, the first drive source 3
- a second drive source 34 (see FIG. 3) is provided to drive the link mechanism 30 to swing and rotate, thereby bending and extending the first and second arm mechanisms 26 and 28.
- the base 22 includes, for example, a bottom plate of a transfer chamber provided in a cluster tool type semiconductor processing system.
- the transfer chamber is maintained in a vacuum state, and a plurality of processing chambers (not shown) are connected around the transfer chamber. Through hole formed in base 22
- a motor box 44 composed of a hollow housing is hermetically attached to the lower surface of the base 22 via, for example, an O-ring sealing member 42.
- the first and second drive sources 32 and 34 are accommodated in the motor pot 44.
- the first and second drive sources 32 and 34 are, for example, each composed of a step motor (pulse motor), and each of the first and second drive sources 32 A and 34.
- the port 32 of the 32 is connected to a hollow (pipe-shaped) outer drive shaft 38.
- the rotor 34 ⁇ ⁇ ⁇ of the second drive source is connected to the inner drive shaft 40.
- a bearing 46 is interposed between the two drive shafts 38, 40 so as to be rotatably supported by each other.
- the outer drive shaft 38 is rotatably supported on the base 22 side by a bearing (not shown) using a magnetic fluid seal, and the first and second drive sources 32, 34 38, 40, etc. are configured as part of the drive mechanism described later
- a rotating base 24 is provided at the upper end of the two rotating-shafts 38, 40.
- the rotating base 24 has a predetermined width.
- the rotation base 24 has a hollow inside and extends a predetermined length in a radial direction (horizontal direction).
- the upper end of the outer drive shaft 38 is directly connected and fixed to the rotating base 24, and both rotate integrally.
- the upper part of the inner drive shaft 40 penetrates through the rotation base 24, and is supported by the rotation base 24 via the bearing 48 so that they can rotate with each other. Is made. Therefore, the inner drive shaft 40 is the center of rotation C 1 of the entire transfer device.
- Two fixed shafts 50 ⁇ 52 stand up on the upper surface on the base end side of the rotating base 24 at a predetermined interval. It is fixed.
- First and second arm mechanisms 26, 28 are rotatably mounted on the fixed shafts 50, 52, respectively.
- the first arm mechanism 26 includes a hollow base end arm 26A, a similarly hollow intermediate arm 26B, and a pick 26C for actually placing and holding the wafer W. Mainly composed.
- the proximal end of the proximal arm 26 A is rotatably supported on the fixed shaft 50 via a bearing 5OA.
- the large pulley 54 is fixed to the fixed shaft 50 so as to be integrated with the fixed shaft 50.
- a rotating shaft 56 penetrated upward is rotatably disposed via a bearing 56 A.
- the small pulley 58 is fixed to 56 and rotates integrally with the rotating shaft 56.
- the ffi coupling 60 is bridged between the small pulley 58 and the large pulley 54 to transmit power.
- the diameter ratio of the small pulley 58 to the large pulley 54 is 1: 2, and the small pulley 58 rotates at twice the rotation angle with respect to the large pulley 54.
- the upper end of the rotating shaft 56 is disposed so as to pass through the inside of the m portion of the intermediate arm 26B, and the upper end is fixed to the upper surface of the intermediate arm 26B.
- the intermediate arm 26B rotates integrally with the rotating shaft 56.
- a small pulley 62 is rotatably supported on the rotating shaft 56 via a bearing 56B.
- the small pulley 62 is fixed to the upper end of a hollow fixed shaft 64 having a coaxial structure with the rotating shaft 5 & passing through the inside, and the fixed shaft 64 has a predetermined length.
- the lower end of the lever extends downward through the middle arm 26B and is fixed to and integrated with the upper surface of the base arm 26A.
- a bearing 56C is interposed between the rotating shaft 56 and the fixed shaft 64, and the fixed shaft 64 is It is rotatably supported by the arm 26 B via the bearing 64 A.
- a rotating shaft 66 is rotatably supported at the distal end of the intermediate arm 26B via a bearing 66A.
- the upper end of the rotating shaft 66 penetrates upward and protrudes, and the base end of the pic 26 C is fixed to the upper end.
- a large pulley 68 is fixed to the rotating shaft 66. Connected velvet between large pulley 68 and small pulley 62
- the diameter ratio between the small pulley V62 and the large pulley 68 is 1: 2, and the large pulley V68 rotates at a rotation angle 1/2 times that of the small pulley 62. With the rotating base 24 fixed, the link mechanism can be used as described later.
- the second arm mechanism 28 is symmetrical but configured similarly to the first arm mechanism 26. That is, the second arm mechanism 2
- the proximal end of the proximal arm 28 A is rotatably supported on the fixed shaft 52 via a bearing 52 A.
- the large pulley 74 is fixed to the fixed shaft 52 so as to be integrated with the fixed shaft 52. .
- a rotating shaft 76 penetrating upward is rotatably disposed via a bearing 76A.
- a small pulley 78 is fixed to the rotating shaft 76, and rotates together with the rotating shaft 76.
- a connecting belt 80 is bridged between the small pulley 78 and the large pulley 4, and power is transmitted.
- Small pool 7 8 and The diameter ratio with the large pulley 74 is 1: 2, and the small pulley 78 rotates at twice the rotation angle with respect to the large pulley 74.
- the upper end of the rotating shaft 76 penetrates the inside of the base end of the intermediate arm 28B, and the upper end is fixed to the upper surface of the intermediate arm 28B.
- the intermediate arm 28B rotates integrally with the rotating shaft 76.
- a small pulley 82 is rotatably supported on the rotating shaft 76 via a bearing 76B.
- the small pulley 82 is fixed to the upper end of a hollow fixed shaft 84 having a coaxial structure with the rotating shaft 76 passing through the inside.
- the fixed shaft 84 has a predetermined length, and its lower end extends downward through the intermediate arm 28B and is fixed to and integrated with the upper surface of the base arm 28A.
- a bearing 76 C is interposed between the fixed shaft 84 and the fixed shaft 84, and the fixed shaft 84 is rotatably supported by the intermediate arm 28 B via the bearing 84 A.
- a rotating shaft 86 is rotatably supported at the distal end of the intermediate arm 28B via a bearing 86A.
- the upper end of the rotating shaft 86 penetrates upward and protrudes upward, and the base end of the pick 26C is fixed to the upper end.
- the large pulley 88 is fixed to the rotating shaft 86. Connecting belt between large pool 88 and small pool 82
- the diameter ratio between the small pulley 82 and the large pulley 88 is 1: 2, and the large pulley 88 rotates at a rotation angle 1/2 times that of the small pulley 82. .
- Both picks 26 C and 28 C are similar to each other. Are arranged on the same plane (horizontal plane).
- the traveling directions of the picks 26 C and 28 C are different, and the opening angle ⁇ is set to about 60 degrees, for example, depending on the size of the wafer W.
- the opening angle ⁇ is set in a range where the wafers do not interfere with each other, for example, in a range of 60 to less than 180 degrees.
- the link mechanism 30 includes a second drive source 34
- the drive link 92 is mainly constituted by a drive link 92 that is swiveled by the ′ and two driven links 94 A and 94 B connected to the drive link 92.
- the drive link 92 is rotatably supported by the rotating base 24.
- FIG. 4 is a sectional view showing the internal structure of the rotating base 24 of the transfer device shown in FIG.
- a rotating shaft 96 is rotatably disposed at the tip of the rotating base 24 via a bearing 96.
- a driven pulley 98 is fixedly disposed on the rotating shaft 96.
- a drive pulley 100 is fixedly mounted on the drive shaft 40 in the rotating base 24.
- the power transmission mechanism is formed by 102.
- the upper end of the rotating shaft 96 protrudes above the rotating base 24, and the base end of the drive link 92 is connected to this upper end, and both rotate integrally. Therefore, by rotating the drive shaft 40 in the normal and reverse directions, the drive link 92 also turns in the normal and reverse directions.
- Drive link 92 also turns in the normal and reverse directions.
- the base ends of the two driven links 94A and 94B are It is arranged rotatably in the horizontal HX state via 104 A, 104 B and a bearing (not shown). O
- the driven links 94 A, 94 B have a predetermined length, ⁇
- the distal end of one driven V-link 94A is placed on the upper surface of the central part of the base arm 26A of the first arm mechanism 26 via support pins 106A and bearings 106B. (See Fig. 3)
- the other end of the driven link 94B is attached to the upper surface of the center of the base arm 28A of the second arm mechanism 28 by a support pin. It is rotatably connected via a pin 108A and a bearing 108B (see Fig. 3).
- FIG. 2 shows that one of the arm mechanisms in the transfer device shown in FIG. FIG. That is, when the drive link 92 is rotated to one side by a predetermined angle, one of the picks 26C moves forward greatly and the other pick 28C moves backward by a small distance.
- Drive link 92 when the drive link 92 is rotated to one side by a predetermined angle, one of the picks 26C moves forward greatly and the other pick 28C moves backward by a small distance.
- the first and second arm mechanisms 2 are The first and second arm mechanisms 2
- the transfer device 20 when the transfer device 20 is oriented in a predetermined direction, the first and second drive sources 32 and 34 shown in FIG. 3 are rotated in synchronization. As a result, the rotating base 24 turns and turns in a predetermined direction ⁇ , and at the same time, the first and second arm mechanisms 26 and 28 are folded. (Contracted state) and turn in the specified direction.
- the driving force is the drive shaft 40, the drive pulley 100, and the connecting belt.
- the rotation is transmitted to the rotating shaft 96 via the driven pulley 98 and the driven pulley 98.
- the first arm mechanism 26 to which the tip of A is connected The base arm 2 of 6
- FIG. 6A rotates around a fixed axis 50 (see FIG. 3) as a fulcrum as shown by arrow C (see FIG. 2).
- the large pulley 54 in the proximal arm 26 A relatively rotates (actually, the proximal arm 26 A rotates without rotating the large pulley 54).
- This rotational driving force is transmitted to the intermediate arm 26 B via the connecting belt 60 and the small pulley 58, and further transmitted to the small pulley 62, the connecting belt 70 and the large pulley 6. 8 to the rotating shaft 66.
- the base arm 26A, the intermediate arm 26B, and the pick 26C change from the folded state to the extended state as shown in FIG.
- the pick 26C advances linearly as shown by the arrow D while facing in the same direction.
- the pick 26C can be inserted into a predetermined processing chamber (not shown). Wear
- the other second arm mechanism 28 moves to a place where it is retracted backward by a small distance, as apparent from comparison between FIG. 1 and FIG.
- the first arm mechanism 26 contracts along the reverse path.
- the operation of exchanging the channel W can be performed more quickly than in a conventional transfer device.
- the entire transporting device 20 is turned through the opening angle of the pick, for example, by 60 degrees, and the other pick holding the unprocessed wafer W is put into the processing chamber. Can be oriented.
- the pick is moved forward or backward.
- the pick holding the wafer W is moved. The amount is small as mentioned above. For this reason, even if the forward or backward movement of an empty pick is performed at a high speed, the wafer W does not fall off from the other pick force. Accordingly, the replacement operation of the wafer W can be performed more promptly.
- FIG. 5 shows a transfer device according to a second embodiment of the present invention, It is a perspective view which does not show the state where both arm mechanisms were contracted.
- FIG. 6 is a plan view showing a state where one of the arm mechanisms is extended in the transfer device shown in FIG.
- FIG. 7 is a partial sectional view showing the transfer device shown in FIG.
- the base ends of 26 and 28 are rotatably supported on two different shafts, that is, fixed shafts 50 and 52 on a rotating base 24, respectively.
- the base ends of the first and second arm mechanisms 26, 28 are supported rotatably on the same fixed axis.
- the pick 26C , 28 C are arranged in different directions on one plane of
- the picks 26C and 28C are arranged one above the other and oriented in the same direction.
- one fixed shaft 1 is mounted on the rotating base 24.
- Fixed shaft 110 is
- the length ⁇ FjX is determined by the fixed axes 50 and 52 (see FIG. 3) of the first embodiment. Further, in practice, the fixed shaft 110 is disposed so as to be displaced by 1 ⁇ ⁇ ⁇ in the horizontal direction with respect to the drive shaft 38 for rotating the rotating base 24. This is the same as in the first embodiment.
- the large pulley 54 of the first arm mechanism 26 and the large pulley 74 of the second arm mechanism 28 are fixedly mounted on one fixed shaft 110 such that they are lined up and down. Attached.
- the base arm 26 A and the second arm of the first arm mechanism 26 are centered on each large pool 54 and 74.
- the base arm 28 A of the two-arm mechanism 28 is provided. Since the first and second arm mechanisms 26, 28 overlap one another vertically, it is necessary to prevent mutual interference. For this reason, the lengths of the fixed shafts 64, 84 connecting the base end and the intermediate arms 26A, 26B and 28A, 28B are set slightly longer.
- the distal ends of the two driven links 94 A and 94 B ′ of the link mechanism 30 are both rotatably supported on the upper surfaces of the base arms 26 A and 28 A. (See Figure 3).
- the height levels of the proximal arms 26A and 28A are different. Therefore, the distal end of one driven link 94A is rotatably supported by the lower surface of the proximal arm 26A.
- the distal end of the other driven link 94B is rotatably supported on the upper surface side of the proximal arm 28A, as in the case of the first embodiment.
- both picks 26C and 28C can move forward and backward in the same direction, albeit at different heights.
- the Z-axis movement mechanism (see FIG. 3) that moves the entire device in the vertical direction (Z direction) in order to match the height-level of both picks 26 C and 28 C during operation. (Not shown).
- FIG. 8A to 8D are diagrams schematically showing a series of operation states of the transfer device shown in FIG.
- FIG. 8A shows a state where the second arm mechanism 28 is extended and the first arm mechanism 26 is contracted. From here, when the link mechanism 30 is turned in the opposite direction, the second arm mechanism 28 starts to contract as shown in FIG. 8B and the first arm mechanism 26 Starts elongation. At this time, the pick 26C of the first arm mechanism 26 is temporarily weak.
- both picks 26 C and 28 C are switched.
- the entire device is slightly moved upward or downward to adjust the height level of both picks 26c and 28C.
- the first and second drive sources 3 are identical to the first and second drive sources 3
- First and second two arm mechanisms 26, 2 having two picks 26C, 28C, which are arranged one above the other, with only two motors 2, 3, 4 8 can be bent and stretched. Therefore, the equipment structure can be simplified and costs can be reduced.
- FIG. 9 is a plan view showing a state in which both arm mechanisms are contracted in the transfer device according to the third embodiment of the present invention.
- FIG. 10 is a plan view showing a state in which one arm mechanism is extended in the transfer device shown in FIG.
- FIG. 11 is a partial cross-sectional view mainly showing a link mechanism of the transfer device shown in FIG.
- the third embodiment similar to the second embodiment,
- the small link mechanism 1 1 2 is composed of the first link lever 1 1 14 and the second link lever 1 16, and both arms 1 1 4 ⁇ 1 16 are connected to be able to bend and stretch.
- the first link 114 is made hollow.
- the upper end of the rotating shaft 96 at the front end of the rotating base 24 is disposed so as to pass through the base end of the first link lever 114.
- the upper end of the rotating shaft 96 is fixedly mounted inside the upper surface of the first link lever 114, so that the first link lever 114 and the rotating shaft 96 are integrated. Rotate.
- a large pulley 120 is rotatably disposed on a rotating shaft 96 in the first link lever 114 via a bearing 118.
- a hollow outer shaft 122 formed coaxially with the rotating shaft 96 is provided on the outer periphery of the rotating shaft 96. The lower end of the outer shaft 122 is fixed to the upper surface of the rotating base 24 and the upper end is fixed to the large pulley 120.
- Bearings 124 A and 124 B are provided between the rotating shaft 96 and the outer shaft 122 and between the outer shaft 122 and the through portion of the first link lever 114.
- the two shafts are rotatable with respect to each other.
- First A rotating shaft 128 is rotatably disposed at the tip of the link nozzle 114 via a bearing 126.
- a small pulley 130 is fixedly disposed on the rotary shaft 128.
- a connecting belt 132 is bridged between the small pulley 130 and the large pulley 120 to transmit the driving force.
- the diameter ratio between the small pool 130 and the large pool 120 is
- the fixed shafts 1 3 3 are arranged so that they stand upright.
- the base end of one driven link 94A is rotatably mounted on the lower portion of the fixed shaft 133 via a bearing 134A.
- the first link mechanism 26 is bent and stretched by the driven link 94A.
- the base end of the other driven link 94B is rotatably mounted on the upper part of the fixed shaft 133 via a bearing 134B.
- the second arm mechanism 28 is bent and stretched by the driven link 94B.
- the distal ends of both driven links 94A and 94B are rotatably supported on the upper surfaces of the base arms 26A and 26B, respectively. It may be rotatably supported on the lower surface, or may be alternately supported on the upper surface and the lower surface.
- the two motors of the first and second drive sources 32 and 34 only overlap the upper and lower motors.
- the whistle 1 and the second two arm mechanisms 26 and 28 each having two picks 26 C and 28 C arranged in this manner can be bent and stretched.
- the equipment structure can be simplified and the cost can be reduced.
- FIG. 12 is a plan view showing a state in which both arm mechanisms are contracted in the transport device according to the fourth embodiment of the present invention.
- FIG. 13 is a side view showing the transfer device shown in FIG. 12.
- FIG. 14 is a side view of the transfer device shown in FIG.
- FIG. 1 A first figure.
- the picks 26C and 28C are vertically overlapped, and a small link mechanism 112 is provided in the link mechanism 3.0.
- the fourth embodiment is different from the third embodiment in that the first and second arm mechanisms 26 ⁇ S are not supported on the same fixed shaft with respect to the rotating base 24, As in the case of the embodiment, the point is that two fixed shafts 50 and 52 provided side by side are individually rotatably supported.
- the first arm mechanism 26 has a base arm 26 A, an intermediate arm 26 B, a pick 26 C, and a base end 26 D of the pick 26 C.
- the second arm mechanism 28 has a base arm 28 A and an intermediate arm 28 B, pick 28C, and base end 28D of pick 28C.
- the second arm mechanism 28 is disposed above the first arm mechanism 26, and the picks 26C28C that are vertically stacked are set so as not to interfere with each other.
- the fourth embodiment can exhibit the same operation and effect as the third embodiment. That is, the first and second motors each having two picks 26 C 28 C arranged so as to be overlapped with each other only by the two motors of the first and second drive sources 3 2 3 4.
- the two arm mechanisms 2 6 2 8 can be bent and stretched. Therefore, the structure of the apparatus can be simplified, and the cost can be reduced.
- FIG. 15 is a plan view showing a state in which two arm mechanisms are extended in the transfer device according to the fifth embodiment of the present invention.
- FIG. 16 is a view showing the transfer device shown in FIG.
- FIG. 9 is a partial cross-sectional view for explaining a connection state between a linear motor and a link mechanism used as a second drive source.
- the fifth embodiment has a configuration similar to that of the third embodiment, but differs mainly in the following points. That is, in the third embodiment, FIG.
- a small link mechanism 1.12 is connected to the base end of 94B. By bending and extending the small V-link mechanism 1 1 2, the driven V-link 94 A
- the base end of 94 B is reciprocated along the straight line 140.
- a linear motor 142 capable of precise position control is provided.
- the linear motors 14 2 are shown in FIG.
- the support ⁇ -quad and 144 are fixed to the moving object 1442A of the linear motor 1442.
- the fixed shaft 133 is disposed so as to stand upright at the support port V144.
- the base ends of the driven links 94 A and 94 B are rotatable on the fixed shaft 133 via the bearings 134 A and 134 1, respectively. Mounting fixed.
- the V-motor 142 is used as the second drive source. That is, two driven links of the link mechanism 30
- the base of 94A and 94B is the moving object of the linear motor
- the moving body 144A is linearly supported by being directly rotatably supported on the 142A side.
- the whistle 2 in the motor box 44 described in FIGS. 3 and 4 2 The drive source 3 4
- the device configuration can be further simplified.
- the first and second arm mechanisms 26 and 28 can be bent and extended in a manner similar to the field ⁇ and
- the first drive source 32 of the fifth embodiment is shown in FIG. 5, the first drive source 32 of the fifth embodiment
- the first and second motors each having two motors (26C28C), two motors (liner motors), which are two driving motors, are arranged so as to overlap each other.
- the two arm machines ⁇ * 2 6 2 8 Can bend and stretch. Therefore, the device structure can be simplified and the cost can be reduced.
- FIG. 17 is a plan view showing a state in which both arm mechanisms are contracted in the transfer device according to the sixth embodiment of the present invention.
- Figure 1
- FIG. 8 is a plan view showing a state where one of the arm mechanisms is extended in the transfer device shown in FIG. 17.
- FIG. 19 is a partial cross-sectional view showing the transfer device shown in FIG. 17. .
- the sixth embodiment has a configuration similar to the fourth embodiment, but differs mainly in the following points. That is, in the fourth embodiment, the driving force of the second driving source 34 is such that the driving boss 100 of the rotating base 24, the connecting belt 102, the driven pulley 98, and the small V link mechanism 1 In contrast to the transmission to both driven links 94 A and 94 B via the second link 12, in the sixth embodiment, the base end of both driven links 94 A and 94 B and the second The drive shaft 40 of the drive source 34 is connected to a drive link 92 of the first embodiment shown in FIG.
- the base end of the drive link 92 is directly connected and fixed to the drive shaft 40 of the drive source 34, whereby the drive link 92 is rotated by the rotation base 24. It is rotatably supported at the center.
- the support pins 104A and 104B are arranged so as to stand up, as in the first embodiment shown in FIG. Is done.
- Each driven pin 104 A, 104 B has two driven links 94 A, 94 via bearing 150, respectively.
- the tip of 4B is pivotably supported via bearings (not shown).
- the drive link 92 pivots about the drive shaft 40 of the second drive source 34, so that the base ends of both driven links 94A and 94B are provided.
- the unit reciprocates along an arc-shaped trajectory centered on the drive shaft 40 unlike the case of the fourth embodiment.
- the first and second arm mechanisms 26, 28 are bent and stretched so as to be in opposite directions to each other.
- FIGS. 20A to 20G are diagrams schematically showing a series of operating states of the transfer device shown in FIG. FIG. 2OA shows a state where the first arm mechanism 26 is extended and the second arm mechanism 28 is contracted. From here, the drive link 92 is rotated to set the link mechanism.
- both picks 26 C and 28 C are switched. In the actual operation, at the time shown in FIG.
- FIG. 21 is a plan view showing a state where both arm mechanisms are contracted in the transfer device according to the seventh embodiment of the present invention.
- 1st and 2nd drive source, rotating base, 1st and 2nd arm of this device The connection mode in the vertical direction with the mechanism is generally as shown in FIG.
- the vertical connection between the first and second drive sources, the rotating base, and one of the arm mechanisms of the device is substantially as shown in FIG.
- the seventh embodiment is similar to the first embodiment.
- the base arms 26A and 28A of the first and second arm mechanisms 26 and 28 are connected to a rotating base 24 (FIG. 2). It is supported on the same plane so as to be rotatable about axes separated from each other on the same plane.
- the picks 26 ⁇ and 28C of the first and second arm mechanisms 26 and 28 are arranged in different directions on the same plane, and the opening angle of the picks 26C and 28C is It is set in the range of 60 to 180 degrees.
- the seventh embodiment differs from the first embodiment in that the turning axis of the drive link 92 of the link mechanism 3.0 is arranged coaxially with the rotation axis of the rotating base 24.
- the operations of the first and second arm mechanisms 26 and 28 in the seventh embodiment are the same as the operations of the first embodiment and the sixth embodiment. That is, for example, from the initial state shown in FIG. 21 in which both the first 'and second arm mechanisms 26 and 28 contract, the second arm mechanism 28 extends and moves the pick 28 C forward. Let's move it. In this case, although the first arm mechanism 26 substantially maintains the contracted state, the angle between the proximal arm 26 A and the intermediate arm 26 B increases with the rotation of the rotating base 24, Pick 26C back. This operation is similar to the operation shown in FIGS. 20D to 20G. At this time, the pick 26C does not face forward, but faces obliquely as shown in FIG.
- the seventh embodiment there is obtained an advantage that the entire structure is compact in comparison with the first embodiment. Further, according to the seventh embodiment, compared to the sixth embodiment, it is necessary to raise and lower the entire three-person room when switching the use of the first and second arm mechanisms 26 and 28. This has the advantage of eliminating
- FIG. 22 is a plan view showing a state where both arm mechanisms are contracted in the transfer device according to the eighth embodiment of the present invention.
- Figure 2
- FIG. 3 is a perspective view showing a state where one of the arm mechanisms is extended in the transfer device shown in FIG.
- the vertical connection between the whistle 1 and the second drive source, the rotating base, and the first and second arm mechanisms of this device is generally as shown in Fig. 3.
- the vertical connection between the first and second drive sources of the device, the rotary base and the arm mechanism in the vertical direction is generally as shown in FIG.
- the eighth embodiment is similar to the seventh embodiment.
- the base arm 26 A, 28 A of the two-arm mechanism 26, 28 is rotatably supported on a circular rotating base 24 around the axes separated from each other on the same plane. .
- the picks 26 C and 28 C of the first and second terminating mechanisms 26 and 28 are arranged in different directions on the same plane, and the picks 26 C and 28 C
- the opening angle is set in the range of 60 to 18 °.
- the rotation axis of the drive link 92 of the link mechanism 30 is arranged coaxially with the rotation axis of the rotation base 24.
- the eighth embodiment is linked to the seventh embodiment and has two
- the dynamic links 94A and 94B are U-shaped, are located at different locations, and are arranged so as to intersect each other.
- the driven link 94 A connected to the first arm mechanism 26 has a center line C with respect to the drive link 92.
- FIGS. 24A to 24E are diagrams schematically showing a series of operating states of the transfer device shown in FIG.
- FIG. 24A shows an initial state in which both the first and second arm mechanisms 26 and 28 contract.
- the rotation base 24 is rotated counterclockwise,
- the transfer device includes first and second arm mechanisms 26,
- the line segment o-OA or O-OB including the connection point OA or OB of the mechanism that does not extend is configured to be small.
- the rotating base 2 is moved from the contracted state shown in FIG. 24A.
- connection OA of the base arm 26 A and the 2 driven y link 94 A shows a dead point state in which points are aligned on a straight line.
- the second arm mechanism 28 extends while the second arm mechanism 28 extends.
- the first arm mechanism 26 is dead center (The three points OOA ⁇ 1 shown in Fig. 24C are aligned on a--straight line). Therefore, the pick 26 C of the first arm mechanism 26 on the contraction side performs a slow operation such as slightly retreating first and then growing slightly.
- the stroke of 26 C is also small.
- the pick 28 C of the second-arm mechanism 28 performs the same operation.
- the devices according to the seventh and eighth embodiments were formed with the same specifications except for the link mechanism, and a comparative experiment was performed.
- FIG. 25 is a graph showing the results of this comparative experiment.
- Figure 2
- L 7 1 and L 8 1 indicate the arm stocks of the first arm mechanism 26 of the device according to the seventh and eighth embodiments, respectively.
- L72 and L82 indicate the arm strokes of the second arm mechanism 28 of the devices according to the seventh and eighth embodiments, respectively.
- the horizontal axis indicates the rotation angle (°) of the rotating base 24, and the vertical axis indicates the arm stock (mm).
- the arm stroke required for the first arm mechanism 26 is set to 60 Omm
- the apparatuses according to the seventh and eighth embodiments respectively, It is necessary to rotate 24 by about 70 degrees and about 80 degrees.
- the arm stroke of the second arm mechanism 28 of the device according to the present embodiment gradually increases to the maximum value of about 400 m ni, the second arm of the device according to the eighth embodiment.
- the mechanism stroke of the mechanism 28 reaches the maximum value of about 10 when the rotating base 24 rotates about 40 degrees.
- the pick of the other arm mechanism operates slowly and the maximum value of the arm stroke is also increased. Due to the small o, the movement acceleration generated in this pick becomes small, and the wedge W on the pick is hardly displaced. Therefore, it is possible to speed up the operation of the arrangement and to increase the throughput o
- 3 ⁇ 4x ⁇ Ik degree can be improved.
- a magnetic field may be formed in the processing chamber.
- the housing made of an anodized aluminum alloy, it is possible to prevent the swing of the arm mechanism due to the magnetic field. .
- the grease is sufficiently impregnated into the alumite coating, so that the replenishment life of grease can be extended.
- the transfer device is set in a vacuum atmosphere.
- the case where it is installed in the air has been described as an example.
- the transfer device may be provided in an atmosphere of atmospheric pressure. Also the first
- the semiconductor device is moved in and out of the processing chamber by the transfer device, and the semiconductor device is exchanged.
- the processing chamber may not be directly involved, or the wafer may be transferred to a transfer route on the way to the transfer device.
- the transfer device for transferring the substrate to be processed has been described.However, a drive mechanism used in the following transfer device will be described in detail.
- each drive axis is required to recognize the rotation speed, rotation angle, and the like of each drive axis.
- the rotational direction between the drive shafts is ih O
- the relative positional relationship between the drive shafts can be easily recognized by obtaining the relative positional relationship between the drive shafts in ⁇ and the origin ilL and the first and second arm mechanisms. You can check the status.For example, both arm mechanisms are folded and contracted.
- One of the arm mechanisms is extended to the longest.
- the gate vane lobe in the processing chamber can be closed to confirm the safe state without interfering with the arm mechanism. You.
- FIG. 26 is an enlarged cross-sectional view showing the drive mechanism according to the embodiment of the present invention.
- FIG. 27 is an explanatory diagram for explaining a positional relationship between a detection pattern and a reflection member, which are main parts of the drive mechanism shown in FIG. 26.
- FIG. 28 is a plan view showing a state where the detection pattern shown in FIG. 27 is developed linearly.
- the drive mechanism described below can be used in all of the transfer devices of the first to eighth embodiments described above.
- this drive mechanism is applied to the first embodiment shown in FIGS. 1 to 4 and a description will be given of a mentor A as an example.
- the driving mechanism 160 includes a plurality of hollow pipes coaxially rotatable with each other, in the illustrated example, two driving shafts 38 and 40.
- the coupling of the drive shafts 38 and 40 includes not only the mechanically directly coupled i-coupling but also a non-contact coupling such as a magnetic coupling.
- the detection light L 1 is radiated in the inner drive shaft 40 along the axial direction.
- the detection light L 1 is The detection light L 1 reflected in a predetermined direction passes through the light passage window 168 toward the outside.
- a detection pattern 170 for irradiating the detection light L1 on the inner surface of the outer drive shaft 38 is provided.
- the reflected light L2 from the detection pattern 170 is received by the light receiving section 1664 following the reverse rate of the detection light L1.
- a light receiving unit is provided by a position detecting unit 172 composed of a computer having a microphone opening or the like.
- the positional relationship of the drive shafts 38, 40 in the rotation direction is detected.
- the hollow pipe-shaped drive shafts 38, 40 are rotatably supported by a bearing 46 interposed between the shafts.
- the inner drive shaft 40 is connected to the second drive source 34 so that the inner drive shaft 40 rotates forward and backward.
- the outer drive shaft 38 is connected to the first drive source 32, whereby the outer drive shaft 38 rotates forward and backward.
- the light emitting section 16 2 and the light receiving section 16 4 are connected to the first and second drive sources 3
- the motor box 44 which is a housing for housing 2, 34.
- an integrated reflection type optical sensor can be used as the light emitting section 162 and the light receiving section 1664.
- the light receiving section 164 emits the detection light L 1 along the axial direction of the hollow pipe-shaped inner drive shaft 40.
- the detection light L1 a laser beam having excellent straightness is preferable, but diffused light may be used.
- the wavelength of the detection light L 1 can be set in all regions such as an infrared region, a visible light region, and an ultraviolet region.
- the reflecting member 166 is made of, for example, a reflecting mirror, and is attached and fixed to the inner surface of the inner drive shaft 40 so that the reflecting surface is inclined at an angle of, for example, 45 degrees. .
- Reflecting members 1 6 6 The detection light L 1 is reflected at an angle toward the radial direction of the inner drive shaft 40.
- a light transmission window 168 having a circular opening P is formed at a portion where the detection light L1 reflected by the reflection member 166 hits the side wall of the inner drive shaft 40. It is sufficient that the light passing window 168 can pass the detection light L1.
- the detection light L 1 passes through the side wall of the drive shaft 40, so that the drive shaft 40 is connected to the drive shaft 40. There is no need to provide an opening. The entire side wall becomes a light passage window.
- a detection pattern 170 is provided along the circumferential direction. As shown in FIG. 28, the detection pattern 170 is composed of a light reflection layer 1 that reflects the detection light L1.
- each of the areas 170A170B has a predetermined length.
- the first and second arm mechanisms 2628 (FIG. 1) (See 3) selectively bends and stretches.
- the length of the light reflection area 170 A is a gate valve that can be opened and closed between the transfer chamber and the processing chamber located around the transfer chamber.
- the setting is made so that the zone (zone) does not interfere (collide) between the get vanoreb and the first and second arm mechanisms 2628.
- the length of the light-absorbing area 170 B is the same as that of the gate vanoleb and the first or second arm mechanism.
- the position detecting section 17 2 determines the relative position in the rotational direction of the vehicle drive shafts 38, 40 based on the output of the light receiving section 16 4 which receives the reflected light L 2 from the detection pattern 170. And it is possible to judge whether or not it is good to close the gate valve.
- the light emitting unit 1662 emits detection light L1. Detection light
- the detection light L 1 reflects through this inner drive shaft 40 along this axial direction
- the beam is reflected by the member 166, and the traveling direction is almost 90 degrees.
- the detection light L 1, whose traveling direction has been changed, passes through the light passage 8 168, and is arranged along the ⁇ ⁇ direction on the inner surface of the outer drive shaft 38 along the ⁇ direction.
- Light from the detection pattern 170 When the detection light L 1 is irradiated on the reflection area 170 A A, the detection light
- the detection light L 1 is applied to the light absorption layer 170 B, and the detection light L 1 is absorbed and absorbed, so that the reflected light L 2 is not generated.
- the position detecting section 172 which receives the output of the light receiving section 1664 recognizes the positional relationship between the drive shafts 38 and 40 in the rotational direction based on the output.
- the direction of the reflecting surface of the reflecting member 166 faces part of the zone of the light absorbing area 17 OB in FIG. 28--> -
- the arm mechanism of one of the two arm mechanisms 26 and 28 is longer than the specified length.
- the first and second drive sources 32 and 34 are composed of stepper motors.
- the determination result of the position detection unit 72 can be used as a criterion for the interlock function. For example, suppose that the host computer is trying to close the gate valve according to the processing on the software. In this case, when the signal of the position detecting section 17 2 force S “reflected light and no light is received at 2” is issued, interference between the arm mechanism and the gate valve occurs. Therefore, based on the judgment result of the position detecting section 72, an interface can be provided by an electric circuit configuration so as not to close the gate valve.
- the detection pattern 170 is formed along the inner surface of the outer drive shaft 38. Instead of this, at least the whole of the outer drive shaft 38 facing the light passing window 168 may be formed as the detection pattern 170.
- FIG. 29 is a perspective view showing a case where the entire outer drive shaft 38 is formed as a detection pattern 170.
- the light reflection area 17 OA is set so that at least the inner wall surface is polished to reflect light.
- the light absorbing area 170B is designed so that at least the inner wall surface is treated with black alumite (when the drive shaft 38 is aluminum) to absorb light. You.
- a detection structure such as 164 is used as a zone sensor for detecting a region having a certain width.
- this detection structure may be used as a position sensor for detecting a fixed position (position). In such a case, it is possible to locate a fixed position in the above as the origin.
- FIG. 30 is a developed view showing a detection pattern 170 when the detection structure is used as a position sensor.
- a light absorption area 170B is formed linearly at a predetermined position of the detection pattern 170 with a small width that the light receiving section 1664 can bear.
- the position of, is the origin. Therefore, the other areas become the light reflecting area 170A.o
- the relationship between the light absorbing area 170B and the light reflecting area 170A is formed in reverse. You may.
- the origin of the relative position of both drive shafts 38, 40 is obtained, that is, both arm mechanisms 26, 28 are obtained. Can be done.
- Such an origin is, for example, a two-arm mechanism as shown in Fig. 1.
- FIG. 31 is an enlarged cross-sectional view showing a modified example of the drive mechanism shown in FIG. 26 based on this viewpoint.
- FIGS. 32A to 32D are plan views showing a state where an example of a detection pattern used in the drive mechanism shown in FIG. 31 is linearly developed.
- an image sensor 180 composed of, for example, a CCD camera is provided in place of the light receiving section 164 (see Fig. 26), and the image of the detection pattern 170 is provided. Is recognized. Detection turn
- a lighting member BX to illuminate this part. Therefore, in Fig. 31, instead of the light emitting section 164 (see Fig. 26), a lighting device that can brighten an area with a certain area, such as an LED (light emitting diode), is used.
- the illumination member 182 on which the member 182 is disposed partially illuminates the detection pattern 170 with the illumination light L3. It should be noted that, when the detection pattern 170 is bright due to external light, "the sunshine member 182 is unnecessary.
- the position detection unit 1 When the image sensor 180 is provided in this way, the position detection unit 1
- 7 2 is for recognition of different brightness, recognition of different colors,
- the detection pattern 170 is, for example, black ",
- the detection pattern 170 is divided into three regions having different colors, for example, red “blue” and “yellow”. These three regions are identified by different colors.
- Fig. 32C and Fig. 32D show the detection pattern 170 when the detection structure is used as a position sensor.
- ⁇ ⁇ ⁇ , and three different figures are arranged.
- Figure 3 In the 2D field ⁇ "1” and “2 and 3 characters are arranged as figures.
- these detection patterns 170 three positions are detected by differences in figures. It can be.
- origin 1-, origin 2 and origin 3 correspond from the left.
- ⁇ ⁇ The desired bending and elongation of each arm mechanism 26, 28 The status can be assigned to each of origins 1 to 3.
- the present invention can be applied to the case of three or more axes.
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US10/564,618 US7837425B2 (en) | 2003-07-16 | 2004-07-09 | Transportation apparatus and drive mechanism |
EP04747644.5A EP1657743B1 (en) | 2003-07-16 | 2004-07-09 | Transfer apparatus and driving mechanism |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-197689 | 2003-07-16 | ||
JP2003197689 | 2003-07-16 | ||
JP2004-009506 | 2004-01-16 | ||
JP2004009506 | 2004-01-16 |
Publications (1)
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WO2005008769A1 true WO2005008769A1 (ja) | 2005-01-27 |
Family
ID=34082310
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/010178 WO2005008769A1 (ja) | 2003-07-16 | 2004-07-09 | 搬送装置及び駆動機構 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7837425B2 (ja) |
EP (1) | EP1657743B1 (ja) |
JP (1) | JP5024411B2 (ja) |
KR (1) | KR100582697B1 (ja) |
WO (1) | WO2005008769A1 (ja) |
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JP2010531739A (ja) * | 2007-04-06 | 2010-09-30 | ブルックス オートメーション インコーポレイテッド | 複数の独立可動関節アームを伴う基板搬送装置 |
JP2014069288A (ja) * | 2012-09-28 | 2014-04-21 | Yaskawa Electric Corp | ロボットアームおよびロボット |
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CN106508282A (zh) * | 2016-09-22 | 2017-03-22 | 华南农业大学 | 一种夹剪式机械臂末端执行器 |
CN113458281A (zh) * | 2021-07-06 | 2021-10-01 | 覃利 | 一种半导体集成加工用成型机 |
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Also Published As
Publication number | Publication date |
---|---|
KR100582697B1 (ko) | 2006-05-23 |
JP2010166083A (ja) | 2010-07-29 |
US20060210387A1 (en) | 2006-09-21 |
EP1657743B1 (en) | 2013-06-05 |
EP1657743A4 (en) | 2011-10-05 |
EP1657743A1 (en) | 2006-05-17 |
KR20050057605A (ko) | 2005-06-16 |
US7837425B2 (en) | 2010-11-23 |
JP5024411B2 (ja) | 2012-09-12 |
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