WO2008133286A1 - 研磨装置及びそのプログラム - Google Patents
研磨装置及びそのプログラム Download PDFInfo
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- WO2008133286A1 WO2008133286A1 PCT/JP2008/057881 JP2008057881W WO2008133286A1 WO 2008133286 A1 WO2008133286 A1 WO 2008133286A1 JP 2008057881 W JP2008057881 W JP 2008057881W WO 2008133286 A1 WO2008133286 A1 WO 2008133286A1
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- WIPO (PCT)
- Prior art keywords
- polishing
- time
- cleaning
- line
- predicted
- Prior art date
Links
- 238000005498 polishing Methods 0.000 title claims abstract description 820
- 238000005406 washing Methods 0.000 claims abstract description 54
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 238000004140 cleaning Methods 0.000 claims description 405
- 238000000034 method Methods 0.000 claims description 60
- 230000008569 process Effects 0.000 claims description 44
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 32
- 229910052802 copper Inorganic materials 0.000 claims description 29
- 239000010949 copper Substances 0.000 claims description 29
- 230000007723 transport mechanism Effects 0.000 claims description 27
- 238000004364 calculation method Methods 0.000 claims description 26
- 230000003111 delayed effect Effects 0.000 claims description 14
- 230000001934 delay Effects 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 235000012431 wafers Nutrition 0.000 description 366
- 230000032258 transport Effects 0.000 description 39
- 239000010410 layer Substances 0.000 description 17
- 230000004888 barrier function Effects 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 10
- 230000007797 corrosion Effects 0.000 description 10
- 239000004065 semiconductor Substances 0.000 description 9
- 238000007517 polishing process Methods 0.000 description 8
- 238000007726 management method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000007689 inspection Methods 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000014653 Carica parviflora Nutrition 0.000 description 1
- 241000243321 Cnidaria Species 0.000 description 1
- 101000873785 Homo sapiens mRNA-decapping enzyme 1A Proteins 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- IYRDVAUFQZOLSB-UHFFFAOYSA-N copper iron Chemical compound [Fe].[Cu] IYRDVAUFQZOLSB-UHFFFAOYSA-N 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 102100035856 mRNA-decapping enzyme 1A Human genes 0.000 description 1
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- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000009965 tatting Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67155—Apparatus for manufacturing or treating in a plurality of work-stations
- H01L21/67207—Apparatus for manufacturing or treating in a plurality of work-stations comprising a chamber adapted to a particular process
- H01L21/67219—Apparatus for manufacturing or treating in a plurality of work-stations comprising a chamber adapted to a particular process comprising at least one polishing chamber
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/04—Lapping machines or devices; Accessories designed for working plane surfaces
- B24B37/042—Lapping machines or devices; Accessories designed for working plane surfaces operating processes therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/34—Accessories
- B24B37/345—Feeding, loading or unloading work specially adapted to lapping
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41865—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by job scheduling, process planning, material flow
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67276—Production flow monitoring, e.g. for increasing throughput
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/32—Operator till task planning
- G05B2219/32304—Minimize flow time, tact, shortest processing, machining time
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/45—Nc applications
- G05B2219/45232—CMP chemical mechanical polishing of wafer
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02041—Cleaning
- H01L21/02057—Cleaning during device manufacture
- H01L21/02068—Cleaning during device manufacture during, before or after processing of conductive layers, e.g. polysilicon or amorphous silicon layers
- H01L21/02074—Cleaning during device manufacture during, before or after processing of conductive layers, e.g. polysilicon or amorphous silicon layers the processing being a planarization of conductive layers
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Definitions
- the present invention relates to a polishing apparatus and a program thereof, and more particularly, to a polishing apparatus that polishes a polishing object such as a semiconductor wafer in a flat and mirror-like manner and a program stored in a control unit of the polishing apparatus.
- a process in which metal (metal) is embedded in ⁇ fll Izumizo and via holes is being used. This is because, after embedding aluminum, a metal such as copper or silver, in a trench or via hole previously formed in the interlayer insulating film, the excess metal is removed by chemical polishing (CMP) and flattened. Process technology.
- FIG. 1A to 1D show an example of forming copper foil in a semiconductor device in the order of steps.
- an insulating film such as an oxide film made of Si 0 2 or a Low-K material film is formed on a conductive layer 1a on a semiconductor substrate 1 on which a semiconductor element is formed.
- Interlayer insulating film 2) is deposited, and via hole 3 and wiring groove 4 are formed as fine recesses for wiring inside this insulating film 2 by, for example, lithography 'etching technology, and it is made of TaN, etc.
- a barrier layer 5 and a seed layer 6 as a power supply layer for electrolysis are formed thereon by sputtering or the like.
- FIG. 1B copper is filled into the surface of the wafer (object to be polished) W, so that copper is filled into the via holes 3 and the fiber grooves 4 of the wafer and the insulating film.
- a copper film 7 is deposited on 2.
- the seed layer 6 and the copper film 7 on the barrier layer 5 are removed by chemical mechanical polishing (CMP) to expose the surface of the barrier layer 5, and further, As shown in FIG. 1D, the barrier film 5 on the insulating film 2 and, if necessary, a part of the surface layer of the insulating film 2 are removed, and the seed layer 6 and the copper film 7 are formed inside the insulating film 2.
- Wiring Copper iron 8 is formed.
- polishing equipment with two polishing lines and one cleaning line has been developed.
- polished wafers objects to be polished
- one wafer enters the cleaning process
- another wafer is processed until the cleaning process is completed.
- Yeha can not enter the cleaning process.
- the cleaning of the wafer that has been polished cannot be started immediately after polishing, and a situation occurs in which the cleaning machine waits until the cleaning machine becomes empty.
- the metal film polishing process for example, in the copper film polishing process in the copper wiring forming process described above, if the polished wafer is left in a wet state after polishing, the copper wiring that forms the copper wiring on the wafer surface Corrosion proceeds. Since copper forms wiring in a semiconductor circuit, the corrosion leads to an increase in wiring resistance. For this reason, it is required to avoid copper corrosion as much as possible.
- the present invention has been made in view of the above circumstances, and a polishing apparatus capable of minimizing the time from the end of polishing to the start of cleaning of an object to be polished while maintaining high throughput as much as possible.
- the purpose is to provide a program stored in the control unit.
- the polishing apparatus of the present invention includes a mounting unit for mounting a cassette containing a plurality of polishing objects, a first polishing line and a second polishing line for polishing the polishing object, and a polishing object after polishing.
- a cleaning line having a cleaning machine for cleaning and a transport line for transporting an object to be polished, and an object to be polished is transported between the mounting portion, the polishing line and the cleaning line.
- a control unit that controls the polishing line, the cleaning line, and the transport mechanism.
- the lift self control unit drives the predicted polishing time in the first and second polishing lines, the predicted transport time in the transport mechanism, the predicted cleaning time in the cleaning line, and the cleaning unit by driving the transport unit in the cleaning line.
- the polishing start time of the first or second polishing line is determined based on the predicted cleaning start time.
- polishing devices of this effort include a mounting unit for mounting a cassette containing a plurality of polishing objects, a plurality of polishing lines for polishing the polishing objects, and a cleaning for cleaning the polished objects after polishing.
- a cleaning line having a machine and a transporting unit for transporting the object to be polished, a transfer mechanism for transporting the object to be polished between the mounting unit, the polishing line and the cleaning line, the polishing line, the cleaning line
- a control unit for controlling the line and the transport mechanism; The control unit uses a time obtained by subtracting a predicted polishing end time when the waiting time is zero from the predicted cleaning start time of the cleaning line as a polishing waiting time, and when the polishing waiting time is positive, the plurality of polishing lines The polishing start time is delayed by the polishing waiting time.
- Still another polishing apparatus includes a mounting portion for mounting a cassette storing a plurality of polishing objects, a polishing line having a plurality of polishing portions for polishing the polishing objects, and a polishing object after polishing
- a cleaning line having a plurality of cleaning machines for cleaning an object and a transport unit for transporting an object to be polished, a transfer mechanism for transporting an object to be polished between the placement unit, the polishing line and the cleaning line;
- a controller that controls the polishing line, the cleaning line, and the transport mechanism; The controller is configured to set a predicted polishing start time of the cleaning line and a predicted polishing end time when the waiting time is a round mouth as a polishing waiting time, and when the polishing waiting time is positive, The polishing start time of the polishing line is delayed by the polishing waiting time.
- the program of the present invention cleans a polishing object after polishing, a mounting unit for mounting a cassette containing a plurality of polishing objects, a first polishing line and a second polishing line for polishing the polishing object, and A cleaning line having a cleaning machine and a transport unit for transporting the object to be polished, a placing unit, a transport mechanism for transporting the object to be polished between the polishing line and the cleaning line, the polishing line, It is stored in the control unit of a polishing apparatus having a control unit for controlling the cleaning line and the transport mechanism.
- This program causes a computer to drive the predicted polishing time in the first and second polishing lines, the predicted transfer time in the transport mechanism, the predicted cleaning time in the cleaning line, and the transport unit in the cleaning line.
- a procedure for determining a polishing start time of the first or second polishing line is executed based on a predicted cleaning start time for starting the cleaning.
- Another program of the present invention places a cassette containing a plurality of objects to be polished.
- a mounting section ; a plurality of polishing lines for polishing the object to be polished; a cleaning machine for cleaning the object to be polished after polishing; and a cleaning line having a transport nut for transporting the object to be polished; It is stored in the control unit of a polishing apparatus having a transfer mechanism for transferring a polishing object between the polishing line and the cleaning line, and a control unit for controlling the polishing line, the cleaning line, and the transfer mechanism.
- a time obtained by subtracting the predicted polishing end time when the waiting time is zero from the predicted cleaning start time of the cleaning line is set as a polishing waiting time, and when the polishing waiting time is positive, the plurality of polishings are performed.
- a procedure for delaying the line polishing start time by the polishing waiting time is executed.
- Still another program includes: a mounting unit that mounts a cassette that stores a plurality of polishing objects; a polishing line that has a plurality of polishing units that polish the polishing object; and a polishing object after polishing.
- the polishing apparatus includes a control unit that controls the line, the cleaning line, and the transport mechanism.
- a time obtained by subtracting a predicted polishing end time when the waiting time is a waiting time from the predicted cleaning start time of the cleaning line is set as a polishing waiting time, and when the polishing waiting time is positive, the polishing is performed.
- a procedure for delaying the polishing start time of the line by the polishing waiting time is executed.
- the present invention while maintaining a high throughput as much as possible, that is, even if the throughput is sacrificed to some extent, the waiting time until the cleaning is started after the polishing is completed is eliminated, and the polishing object after the polishing is completed Can be cleaned immediately, for example, when used in the copper wiring formation process, copper corrosion can be more completely prevented.
- FIG. 1A to 1D are diagrams showing an example of forming a copper spring in a semiconductor device in the order of steps.
- FIG. 2 is a plan view showing an outline of the overall configuration of the polishing apparatus according to the embodiment of the present invention.
- FIG. 3 is a configuration diagram showing an outline of the polishing apparatus shown in FIG.
- Fig. 4 is a time chart when the controller shown in Fig. 2 is controlled by the control unit so that the throughput is maximized.
- FIG. 5 is a time chart showing a first control example of the polishing apparatus shown in FIG.
- FIG. 6 is a time chart showing a second control example of the polishing apparatus shown in FIG.
- FIG. 7 is a time chart showing a third control example of the polishing apparatus shown in FIG.
- FIG. 8 is a time chart showing a fourth control example of the polishing apparatus shown in FIG.
- FIG. 9 is a flowchart showing the relationship between the polishing line, the transfer mechanism, and the transfer management software in which the transfer is controlled so that the wafer arrives at the second reversing machine without waiting time after the completion of the second polishing.
- FIG. 10 is an image of the wafer map when the wafer being calculated is in the first cleaning machine and the second to fourth cleaning machines are in an empty state.
- Fig. 1 1 A shows an example of the wafer map image of the previous wafer
- Fig. 12 is a flowchart showing the relationship between the cleaning unit and the transfer management software.
- a wafer W having a copper film 7 formed on the surface shown in FIG. 1B is prepared, and the copper film 7 and the seed layer 6 on the noria layer 5 are polished as shown in FIG. 1C.
- Siliconed polishing An example in which two-stage polishing is performed is shown. Further, the process management of the polishing apparatus described below is performed in the control unit 70 shown in FIG. 2 in the polishing apparatus, and the process management system is stored in the control unit as a program.
- FIG. 2 is a plan view showing an outline of the overall configuration of the polishing apparatus according to the embodiment of the present invention
- FIG. 3 is a configuration diagram showing an outline of the polishing apparatus shown in FIG.
- the polishing apparatus according to the present embodiment includes a substantially rectangular housing 10 and a plurality (three in this embodiment) of cassettes 1 containing a large number of semiconductor wafers (polishing objects).
- a mounting part 14 for mounting 2 is provided.
- the cassette 12 is accommodated in an airtight container composed of, for example, SMIF (Standard Manufacturuig Interface; Pod 7 FP (Front Opening Unined Pod) force.
- SMIF Standard Manufacturuig Interface
- Pod 7 FP Front Opening Unined Pod
- a first polishing line 20 having a first polishing portion 2 2 and a second polishing portion 24 4, located on one side surface along the longitudinal direction, and a first polishing portion 3
- a second polishing line 30 having 2 and a second polishing section 34 is accommodated.
- the first polishing section 2 2 of the first polishing line 20 has a top ring 2 2 a that holds the wafer W detachably.
- the second polishing section 2 4 includes a top ring 2 4 a that holds the wafer detachably and a polishing table 2 4 b that has a polishing surface on the surface 2 4 b. b.
- the first polishing section 3 2 of the second polishing line 30 includes a top ring 3 2 a and a polishing table 3 2 b
- the second polishing section 3 4 includes a top ring 3 4 a and a polishing table. It has 3 4 b.
- a cleaning line 40 is housed inside the housing 10 on the other side surface along the longitudinal direction.
- the washing line 40 is arranged in series with the first washing machine 4 2 a, the second washing machine 4 2 b, the third washing machine 4 2 c, and the fourth washing machine 4 2 d. It has four washing machines and a transport unit 4 4 (see Fig. 3) that has hands as many as these washing machines and repeats reciprocating motion.
- the transfer unit 4 4 As a result, by the reciprocating motion of the transfer unit 4 4, the wafer is moved into the first cleaning machine 4 2 a ⁇ the second cleaning machine 4 2 b ⁇ the third cleaning machine 4 2 c ⁇ the fourth cleaning machine 4 2 d. Then, it is cleaned while being conveyed sequentially.
- This washing tact (washing time) is set to the washing time in the washing machine with the longest washing time among the washing machines 4 2 a to 4 2 d, and the washing process in the washing machine with the longest washing time is After completion, the transfer unit 44 is driven and the wafer is transferred.
- a transfer mechanism 50 for transferring the wafer is disposed between the mounting portion 14, the polishing lines 20 and 30, and the cleaning line 40.
- This transport mechanism 50 has a first reversing machine 52a for reversing the wafer before polishing at 180 °, and a second reversing machine 52b for reversing the wafer after polishing at 180 °.
- the second transfer robot 5 between the second reversing machine 5 2 b and the cleaning line 4 0 4 b are arranged respectively.
- the first linear transporter 5 6a, the second linear transporter 5 6b, and the third linear transporter 5 6c are arranged in order from the mounting part 14 side.
- a fourth linear transporter 56d The first reversing machine 52a is disposed above the first linear transporter 56a, and a lifter 58a that can be moved up and down is disposed below the first reversing machine 52a.
- a pusher 60a that can be moved up and down is disposed below the second linear transporter 56b, and a pusher 60b that can be moved up and down is disposed below the third linear transporter 56c.
- a lifter 5 8 b that can be moved up and down is arranged below the fourth rear air transporter 5 6 d.
- the fifth linear transporter 5 6 e, the sixth linear transporter 5 6 f and the seventh rear air transporter 5 6 g are arranged in order from the mounting portion 14 side. Is arranged.
- a lifter 58 c that can be moved up and down is disposed below the fifth rear air transporter 56 e, and a pusher 60 c that can be moved up and down is disposed below the sixth linear transporter 56 f. Yes.
- a pusher 60 d that can be moved up and down is placed below the seventh linear transporter 56 g.
- the first, third, etc. wafers taken out from one of the cassettes 1 2 placed on the placement part 14 by the first transfer robot 5 4 a are the first reversing machine 5 2 a ⁇ 1st linear transporter 5 6 a ⁇ Top ring 2 2 a (1st polishing part 2 1 of 1st polishing line 20) ⁇ 2nd linear transporter 5 6 b ⁇ Top ring 2 4 a ( 1st polishing line 20 2nd polishing part 2 4) ⁇ 3rd linear transporter 5 6 c ⁇ 2nd transfer port Pot 5 4 b ⁇ 2nd reversing machine 5 2 b ⁇ cleaning machine 4 2 a ⁇ cleaning machine 4 2 b ⁇ Washing machine 4 2 c ⁇ Washing machine 4 2 d ⁇ First transfer robot 5 4 A is transferred to the original cassette 1 2 by the route of 4 a.
- the second, fourth, etc. wafers taken out from the same cassette 1 2 placed on the placement part 1 4 by the first transfer robot 5 4 a are the first reversing machine 5 2 a ⁇ 4th linear transporter 5 6 d ⁇ 2nd transfer robot 5 4 b ⁇ 5th linear transporter 5 6 e ⁇ Top ring 3 2 a (1st polishing part 3 2 of 2nd polishing line 30) ⁇ 6th Your transporter 5 6 f ⁇ Top ring 3 4 a (2nd polishing part 3 4 of 2nd polishing line 30) ⁇ 7th linear transporter 5 6 g ⁇ 2nd transfer robot 5 4 b ⁇ 2nd reversing machine 5 2 b ⁇ Washing machine 4 2 a ⁇ Washing machine 4 2 b ⁇ Washing machine 4 2 c ⁇ Washing machine 4 2 d ⁇ First transfer robot 5 4 a is transferred to the original cassette 1 2 .
- the copper film 7 and the seed layer on the barrier layer 5 6 is removed by polishing (first polishing), and the second polishing part 24 of the first polishing line 20 and the second polishing part 34 of the second polishing line 30 are used to remove the barrier layer 5 on the insulating film 2 and If necessary, remove a part of the surface layer of the insulating film 2 by polishing (second polishing). Then, the wafers after the second polishing are sequentially cleaned by the cleaning machines 4 2 a to 4 2 d, dried, and then returned to the cassette 12.
- the first wafer and the second polishing line 30 are cleaned.
- the polished second wafer is simultaneously held by the transfer unit 44, and the first wafer is transferred to the second washer 4 2b, and the second wafer and the first washer 4 2a are transferred simultaneously. Wash two wafers at the same time.
- the first and second wafers and the third wafer polished by the first polishing line 20 are simultaneously held by the transport unit 44, and the first wafer is held by the third cleaning machine 42.
- the second wafer is simultaneously transferred to the second cleaning machine 4 2 b and the third wafer is simultaneously transferred to the first cleaning machine 4 2 a to simultaneously clean the three wafers.
- the two polishing lines 20 and 30 can be dealt with by one cleaning line 40.
- the polishing apparatus is controlled by the control unit so as to maximize the throughput, as shown in the time chart of FIG. 4, the second wafer after the polishing is cleaned by the first cleaning machine 4 2 a.
- a cleaning waiting time S occurs in the meantime.
- a cleaning waiting time S 2 is generated before the third wafer after polishing is cleaned by the first cleaning machine 4 2 a.
- cleaning waiting times S 3 and S 4 occur before the cleaning by the first cleaning machine 4 2a.
- the odd-numbered wafers taken out from the same cassette 12 are polished alternately by the first polishing line 20 and the even-numbered wafers taken out by the second polishing line 30 alternately.
- the odd-numbered wafers taken out from the same cassette 12 are polished by the second polishing line 30 and the even-numbered wafers are alternately polished by the first polishing line 20.
- wafers that are alternately taken out from different cassettes may be alternately polished by the first polishing line 20 and the second polishing line 30 to return the cleaned wafer to the original cassette.
- the polishing apparatus in order to maintain the high throughput as much as possible, eliminate the waiting time for cleaning, and allow the wafer to be immediately cleaned in the shortest time after polishing, the polishing apparatus is controlled by the controller as follows. Control. In the following example, the odd-numbered wafers taken out from the same cassette 12 are polished alternately by the first polishing line 20 and the even-numbered wafers are polished alternately by the second polishing line 30. The case will be explained.
- the difference between the predicted polishing end time and the predicted cleaning start time in the first polishing line 20 and the second polishing line 30 is calculated, and this difference is used as the polishing waiting time.
- the polishing start time in the first polishing unit 2 2 of the 1 polishing line 20 and / or the first polishing unit 3 2 of the second polishing line 30 is delayed by the polishing waiting time. Specific examples are described below.
- Predictive calculations are performed before starting the polishing process. Specifically, before starting the polishing process, specifically, when the transfer of the wafer from the first linear transporter 56 a to the first polishing unit 22 of the first polishing line 20 is started, or the transfer ends. After. When polishing is started from the second polishing line 30, when the transfer of the wafer from the fifth linear transporter 56 e force to the first polishing section 32 of the second polishing line 30 is started, Is after the conveyance is finished.
- the predicted polishing time T in the first polishing section is estimated by predicting the polishing time in the first polishing section 22 of the first polishing line 20.
- the predicted polishing time of the first polishing unit 32 in the second polishing line 30 is also Ti.
- As the predicted polishing time T ⁇ for example, a past average time calculated from the recipe data or the same recipe is adopted. Polishing by the first polishing units 2 2 and 3 2 (first polishing) is generally performed while detecting the polishing end point. Thus, when polishing while detecting the end point, the polishing time varies between wafers. For this reason, it is preferable to adopt an average time.
- the predicted polishing time at the second polishing section 24 of the first polishing line 20 is estimated, and the predicted polishing time at the second polishing section is set to 2 .
- the predicted polishing time in the second polishing section 3 4 of the second polishing line 3 0 also becomes T 2.
- T 2 for example, employing a past average time in calculation or the same recipe from the recipe data.
- the line prediction transport time also T 3 of the second polishing line 3 0.
- Estimated polishing time in the first polishing section ⁇ Total estimated polishing time in the second polishing section ⁇ 2 and predicted in-line transfer time ⁇ 3 ⁇ , + ⁇ . + ⁇ 3 in the first polishing line 20 This is the estimated polishing time.
- the predicted polishing time in the second polishing line 30 is the same value as the predicted polishing time in the first polishing line 20.
- the wafer after the polishing by the first transfer line 20 (the first polishing at the first polishing unit 22 and the second polishing at the second polishing unit 24) is washed through the second reversing machine 5 2 b. to predict the time for conveying the ⁇ line 4 0, the predicted transport time T 4 in the transport mechanism.
- n-1 th wash the estimated starting time F of the wafer (n - a time obtained by adding the predicted cleaning time T 5 by the cleaning line 4 0 ", and when cleaning start prediction in n-th Weha time F n
- n—the predicted cleaning start time F — for the first wafer is the predicted time at which the cleaning process for the previous wafer is started as viewed from the nth wafer to be calculated. This is the predicted time when the transfer unit 44 of the cleaning line 40 is driven and the wafer is taken into the first cleaning machine 4 2a of the cleaning line 40 in order to clean the wafer.
- It predicted cleaning time T 5 is also referred to as a cleaning tact.
- the cleaning tact is 5 .
- This cleaning tact T 5 is calculated from, for example, recipe data, or the past average time in the same recipe is adopted.
- the cleaning tact includes the time related to the cylinder operation in which the cleaning pen and brush move up and down, but since this operation can be changed by hardware such as the speed control function, Past average time can be adopted according to customer requirements.
- Predicted cleaning start time F n and cleaning tact (predicted cleaning time) T 5 are the first polishing line Common to 20 and second polishing line 30.
- each forecast time mentioned above is the first polishing line Common to 20 and second polishing line 30.
- the polishing waiting time is A
- the calculation shown in the following prediction formula is performed to obtain the polishing waiting time A.
- the predicted polishing time T ⁇ in the first polishing part is 120
- the predicted polishing time T 2 in the second polishing part is 90
- the estimated in-line transfer time of the wafer ⁇ 3 is 30, and the expected transfer time in the transfer mechanism ⁇ 4 is 30 and cleaning tact 5 is 90.
- the unit may be seconds, but it may be considered as the relative value of each process. It should be noted that when the first polishing line 20 and the second polishing line 30 polish wafers in different cassettes, the predicted polishing time may be different. In this case, the longer polishing time is used.
- the control unit uses the first polishing unit 2 2 of the first polishing line 20 for the first wafer.
- calculate the estimated cleaning start time to start cleaning the first wafer. Specifically, 100 (current time) +120 (T +90 ( ⁇ 2 ) +30 ( ⁇ 3 ) +30 ( ⁇ 4 ) 370.
- the predicted cleaning start time for the first wafer (wafer ID: F1W01) is set in the blank state shown in Table 1 below. In this case, the first polishing waiting time is zero. (table 1)
- the calculation unit starts the above-mentioned first wafer from the current time 130.
- the calculation unit adds the cleaning tact 90 to 370, which is the predicted cleaning start time for the first wafer, and the transport unit 4 4 of the cleaning line 40 starts driving.
- the difference 60 from 400 is derived, and as shown in Table 3, this is the first polishing wait time for the second wafer (wafer ID: F2W01).
- the control unit controls the first polishing unit of the second polishing line 30 so that the second wafer after polishing is transferred to the cleaning line 40 immediately before the transfer unit 44 of the cleaning line 40 starts driving.
- a command is sent to the 32 top rings 34a to wait for 60 hours before starting polishing (1st polishing).
- the first wafer reaches the first re-air transporter 52a.
- set the estimated cleaning start time for the first wafer and then set the 5th
- the second wafer arriving at the second transporter 56 e calculates the polishing waiting time, and delays (waits) the start of polishing by the first polishing unit 32 by this polishing waiting time. It is possible to put the wafer in a dry state before starting the process.
- the difference 30 between the predicted cleaning start time 550 and the predicted polishing end time 5 20 is derived, and as shown in Table 4, this is the first polishing wait time for the third wafer (wafer ID: F 1W02).
- the control unit controls the first polishing unit 22 of the first polishing line 20 so that the third wafer after polishing is transferred to the cleaning line 40 immediately before the transfer unit 44 of the cleaning line 40 starts driving.
- a command is sent to Top Ring 24 a to wait for 30 waits before starting polishing (1st polishing).
- the calculation unit performs the same calculation as the first wafer from the current time 340.
- the estimated polishing end time 610 is derived when the waiting time is the opening.
- the calculation unit adds the cleaning tatting 90 to 550, which is the predicted cleaning start time F 3 for the third wafer, and the transport unit 44 of the cleaning line 40 starts driving.
- the difference 30 between the predicted cleaning start time 640 and the predicted polishing end time 610 is derived, and as shown in Table 5, this is calculated for the fourth wafer (wafer ID: F 2W02). 2008/057881
- the control unit controls the first polishing unit of the second polishing line 30 so that the polished fourth wafer is transferred to the cleaning line 40 immediately before the transfer unit 44 of the cleaning line 40 starts to drive.
- a command is sent to the 32 top rings 34 a to wait for 30 waits before starting polishing (first polishing). Thereafter, the same calculation is performed for subsequent wafers.
- Figure 5 shows the time chart at this time.
- First polishing is started.
- the waiting time for cleaning before the start of the polishing process after the completion of polishing is set to the waiting time for polishing before the start of the polishing process, thereby eliminating the waiting time for cleaning after polishing and before cleaning. Can do.
- the polishing waiting time before polishing by the first polishing units 22 and 32 is calculated, and the polishing waiting time is not calculated before polishing by the second polishing units 24 and 34.
- the polishing waiting time before polishing by the second polishing parts 24 and 34 is calculated, and polishing by the second polishing part (second polishing) It may be possible to delay the start of polishing only (second example).
- a time chart in the second example is shown in FIG.
- the concept of the prediction formula is the same as in the first example, but the second linear transporter 56b or the second polishing section 24 of the first transfer line 20 or the fifth linear transporter.
- the cleaning waiting time that has conventionally occurred after polishing and before cleaning is defined as the polishing waiting time before the start of polishing by the second polishing units 2 4 and 3 4. This eliminates the waiting time for cleaning.
- the polishing waiting time is calculated before polishing by the first polishing unit 2 2, 3 2 (first polishing), and again before the polishing by the second polishing unit 24, 3 4 (second polishing)
- a third example in which the second polishing is also delayed by calculating is described.
- the first polishing parts 2 2 and 3 2 polish the copper film 6 (first polishing) to expose the lower barrier layer 5. Thereafter, the barrier layer and, if necessary, the underlying insulating film 2 are polished (second polishing) by the second polishing portions 24 and 3 4.
- the first polishing the thickness of the copper film to be polished is larger than in the second polishing, and the polishing operation of the first polishing is generally performed by detecting the end point using an eddy current sensor or an optical sensor. Has been terminated. In other words, since the polishing operation of the first polishing is not performed by time control, the polishing time varies greatly between wafers in the first polishing.
- the actual polishing time (actual polishing time) in the first polishing section is the expected polishing time. If it is longer than 1 ⁇ (1 ⁇ >! ⁇ ), The operation of the second polishing and transfer mechanism will be accelerated accordingly (advanced). On the other hand, since the cleaning line is limited by the cleaning time that is being cleaned at that time, the wafer after the second polishing will eventually wait until the transfer unit of the cleaning line is driven for the amount of time ahead. Become. That is, copper corrosion progresses accordingly.
- control unit 'performs an operation to compensate for an error between the estimated polishing time T in the first polishing and the actual polishing time t ⁇ , that is, a variation in the polishing time before the second polishing. .
- Figure 7 shows the time chart of the third example.
- washing the estimated starting time F 4 for the fourth wafer which is calculated in the second polishing ago, replaces the cleaning start prediction time time of the wafer.
- the polishing delay is reflected in subsequent wafers. It is necessary to This is because the predicted cleaning start time F n for the subsequent n-th wafer has already been recursively derived when the first wafer is loaded, and the first polishing is predicted for this derivation. This is because the polishing time 1 ⁇ employs an average value. Therefore, in order to correct the predicted cleaning start time F n for the subsequent n-th wafer, the control unit performs a calculation process in which the delay of the first polishing is recursively reflected on the subsequent wafer. When the predicted cleaning end time of this wafer is later than the predicted cleaning start time of the next wafer, the wafer is skipped and the predicted cleaning start time is delayed for the next wafer.
- the actual polishing time t is increased by 30 from the predicted polishing time T predicted by the first polishing unit 22.
- Table 6 for the second wafer (F 2W 0 1) in the second polishing line 30, both polishing by the second polishing unit 3 4 and conveyance after polishing are performed as scheduled. This is the same as Table 3 above.
- the predicted cleaning start time F 3 for the third wafer (F 1 W 0 2) is set to 5 50 as shown in Table 7.
- the predicted cleaning start time F 4 for the fourth wafer (F 2W 0 2) is set to 6 40. This is the same as Table 5 above.
- the transfer unit 44 of the cleaning line 40 waits until the wafer comes because the wafer does not come even when the predicted cleaning start time F 3 550 scheduled for the third wafer is reached. It will be.
- This predicted cleaning start time 580 is shown in Table 7. It is later than the initial expected cleaning start time 550. Therefore, as shown in Table 8, the predicted cleaning start time F 3 for the third wafer is changed to 580. Thus, the cleaning for the third wafer is performed.
- the cleaning line transport unit is driven at 580, resulting in 30 delays. Therefore, as shown in Table 9, the control unit reflects the 30 delays as the polishing waiting time before the second polishing for subsequent wafers.
- the difference between the predicted cleaning start time 6 70 and the predicted polishing end time 6 40 is set as the second polishing waiting time.
- the variation in the polishing time of the first polishing portion was compensated before the second polishing.
- the variation in the polishing time of the second polishing cannot be compensated.
- the polishing time may vary as in the first polishing. Therefore, in this fourth example, the fluctuation of the polishing time of the second polishing is compensated by reflecting the fluctuation of the polishing time of the second polishing on the predicted cleaning start time for the subsequent wafer.
- Figure 8 shows the time chart of the fourth example.
- the actual polishing time (actual polishing time) t 2 in the second polishing unit 24 is longer than the predicted polishing time T 2 in the second polishing unit. (T 2 > T 2 ).
- the delay time in the first wafer that is, the actual polishing time and the estimated polishing time in the second polishing unit.
- the difference (t 2 – T 2 ) is the cleaning waiting time for the second wafer.
- the delay time of the first wafer is reflected recursively as the polishing wait time for the second polishing by the arithmetic processing of the control unit.
- the actual polishing time t 2 in the second polishing section for the first wafer 15 slow and Natsuta than predicted polishing time T 2.
- the transfer unit 44 in the cleaning line 40 has a cleaning waiting time because the wafer is not in the cleaning line 40 at the predicted cleaning start time.
- the predicted cleaning start time F 3 for the third wafer is 5 6 5. Therefore, the difference 15 between the predicted cleaning start time 5 6 5 and the predicted polishing end time 5 5 0, as shown in Table 12, the second wafer (wafer ID: F 1 W 0 2) 2Second polishing waiting time at the polishing section.
- the control unit can mark the wafer, transport it to an inline film thickness inspection apparatus provided in the vicinity of the wafer cassette after cleaning and drying, and observe the surface state of the wafer. .
- in-line film thickness inspection equipment takes time because of its high inspection accuracy, and sampling inspection may be performed on arbitrary wafers.
- the polishing process can be stabilized and the sampling conditions can be optimized.
- the polishing apparatus having two polishing lines and one cleaning line has been described.
- the present invention can be applied to other apparatus configurations.
- the conveyance control according to the present invention is applied.
- Which one is adopted is determined in consideration of the configuration of the equipment and the processing capacity of the control unit.
- the present invention can be applied even when there is one polishing line and one cleaning line. That is, the present invention can be applied when the sum of the polishing time and the transport time is longer than the cleaning time, in other words, when the cleaning time is a rate-limiting condition.
- an example of calculating the predicted polishing start time for the second and subsequent wafers from the start of polishing is given.
- the time when the transport unit in the cleaning line is driven next is calculated and predicted from the cleaning time, and the waiting time is derived by subtracting the sum of the polishing time and the transport time from this cleaning time.
- the cleaning time is representative of the cleaning time of the cleaning machine having the most time-consuming cleaning process among the cleaning lines.
- the polishing time can be either fixed time or average time.
- wafer map The wafer position data in the cleaning unit 40 at the time “(hereinafter referred to as wafer map) is calculated, and after the second polishing, the wafer is transferred to the second reversing machine 5 2 b without waiting after the second polishing.
- the timing of the start of polishing may be controlled / controlled so as to arrive.
- the cleaning process by the cleaning machines 4 2 a to 4 2 d is completed, the uncleaned wafer scheduled to arrive at the second reversing machine 5 2 b has actually arrived at the second reversing machine 5 2 b. If not, set Inter Lock to the operation of the transfer unit 4 4, stop the operation of the transfer unit 4 4, and continue until the wafer reaches the second reversing machine 5 2 b. The cleaning process may not be started.
- Fig. 9 shows the polishing lines 20 and 30, the transport mechanism 50, and the transport management software, in which the transport is controlled so that the wafer arrives at the second reversing machine 5 2 b without waiting after the completion of the second polishing.
- the transfer management software determines the presence or absence of a wafer in the second polishing parts 24 and 34 immediately after, and the wafer is If not, (1) Scheduled cleaning start time for each wafer, (2) Standby time on each air transporter (LTP) 56 a to 56 c, 56 e to 56 g, and (3) Wafer map calculation I do. These calculation methods differ depending on the presence or absence of wafers in the cleaning line 40. Each case will be described below.
- the expected cleaning start time is the time obtained by adding “the transport time from the current position to the second reversing device 52 b” to the “current time”.
- the standby time of each wafer on the linear transporter (LTP) 56 a to 56 c and 56 e to 56 g is “0,”. 2nd to 4th washing machines
- FIG. Figure 10 shows that the wafer being calculated is the first cleaning machine.
- the second to fourth cleaning machines 42 b to 42 d are located at 42 a, and show an image diagram of the wafer map when it becomes empty.
- the predicted cleaning start time is the time when “predicted cleaning tact time” XN is added to “predicted cleaning start time of previous wafer” (“predicted cleaning start time of previous wafer” + “predicted cleaning tact time” XN).
- the waiting time on each linear transporter (LTP) 56 a to 56 c, 56 e to 56 g is from “cleaning start expected time” to “current time” and “conveyance from current position to second reversing machine 52 b”
- the value obtained by subtracting the value obtained by adding the “time” (“estimated cleaning start time” one (“current time” + “conveying time from the current position to the second reversing machine 52 b”)) is there.
- the wafer map shifts the wafer map of the previous wafer by “N”, and the first washing machine 4 2 a has the wafer being calculated.
- N 3rd cleaning machine 4 2c and 4th cleaning machine 4 2d
- the expected cleaning start time since it is not affected by the previous wafer cleaning tact, the expected cleaning start time, waiting time on each linear transporter (LTP) 5 6 a to 5 6 c, 5 6 e to 5 6 g, And the wafer map of each wafer is calculated in the same way as when there is no wafer in the cleaning line.
- LTP linear transporter
- “predicted cleaning start time of the previous wafer” means an estimated cleaning start time of a wafer that is loaded into the first cleaning machine 42 a one ahead of the wafer whose predicted cleaning start time is being calculated. If there is no uncleaned wafer for which the expected cleaning start time is calculated in the polishing machine, the actual value of the final cleaning start time is used as the “previous-wafer expected cleaning start time”. That is, the cleaning start flag is turned on when the shutter of the cleaning unit 40 is opened, and the transfer management task stores the time at that time. At that time, the cleaning tact is calculated based on the weno and position information in the cleaning machine at that time.
- “Cleaning tata” means the time obtained by adding the transport time by the transport unit 40 to the longest cleaning processing time in the cleaning machines 4 2 a to 4 2 d. Even in the same cleaning recipe, the value of the cleaning tact changes depending on the position of the wafer present in the cleaning machine, so in the above formula (1), strictly speaking, it is not simply “X N”. Therefore, the cleaning tact is actually calculated based on the wafer map of the previous wafer.
- the wafer map will be “N” at that time. Create using. This parameter is intended to speed up throughput by placing the wafer in the cleaning line 40, for example About 5 seconds.
- the estimated cleaning start time is calculated using “N” that satisfies the above equation (1).
- the transport time from the current position to the second reversing machine 5 2 b is the total time shown below.
- Processing time of the second reversing machine 52 b-Here, “Processing time of the first polishing part” and “Processing time of the second polishing part” for each unit of the job in the same cassette The average value of the same recipe in the past is used for the first wafer of the job. If the average value in the past is V, use the recipe setting time (total processing time for the polishing step). The same applies to the following.
- the transfer time from the current position to the second reversing machine 5 2 b is the total time shown below.
- the “conveying time from the current position to the second reversing machine 52 b” is the following total time.
- the “conveying time from the current position to the second reversing machine 52 b” is the following total time.
- the “conveying time from the current position to the second reversing machine 52 b” is the following total time.
- the transport time from the current position to the second reversing machine 5 2 b is the total time shown below.
- the transport management software counts the waiting time and then sends a transport permission signal to the transport mechanism. That is, as described above, the linear transporter is provided with a waiting time prior to the first polishing unit 22, 32 force and the transfer to the second polishing unit 24, 34. This waiting time is the error time of the previous step. Since the wafer located at the linear transporters 56 c and 56 g is then moved to the cleaning process, this processing is not performed on the wafer located at the rear air transporters 56 c and 56 g.
- the transfer mechanism Upon receiving this transfer permission, the transfer mechanism delivers wafers from each pusher to each top ring, and moves the wafer information (wafer pap) to the polishing unit.
- the transfer management software receives the wafer information movement signal from the polishing unit and resets the start permission.
- the cleaning line 40 opens the shatter, drives the transfer unit 4 4, and drives the wafer located in the second reversing machine 5 2 b to the first cleaning machine 4 2 a and the first cleaning machine 4 2 a
- the wafer located in the 2nd cleaning machine 4 2 the wafer located in the 2nd cleaning machine 4 2 b in the 3rd cleaning machine 4 2 c, and the wafer located in the 3rd cleaning machine 4 2 c in the 4th cleaning Transport to machine 4 2 d at the same time.
- the cleaning process according to the cleaning recipe is started, and the cleaning process according to all the cleaning recipes of the first to fourth cleaning machines 4 2 a to 4 2 d is finished. Transport and cleaning process.
- the transfer management software receives the cleaning opening 40 (cleaning operation start) signal, and handles the case where the second polishing time at the second polishing units 3 4 and 4 4 is different from the expected polishing time.
- the error between the actual cleaning start time and the expected time is calculated and reflected in the expected time of the uncleaned wafer.
- the estimated cleaning start time of the wafer located upstream from the Uet where the serious failure occurred is set to an invalid value (for example, 1) and is not referenced when calculating the expected cleaning start time of the subsequent wafer.
- the transport management task is sent to scraping or re-polishing without allowing the wafer transfer operation from the linear transporter to the top ring for the ueno whose expected cleaning start time is invalid.
- the weigher positioned in the first polishing section 22 and the linear transporter 5.6 a Set the expected cleaning start time of c to an invalid value.
- the second polishing section 24 of the first polishing line 20 When a serious failure occurs in the second polishing section 24 of the first polishing line 20 at the lowered position of the pusher 60b, the second polishing section 24, the linear transporter 56b, the first polishing section 22 and Linear transporter 5 6 Sets the expected cleaning start time for the wafer located at a to an invalid value.
- the linear transporter 5 6 g, the second polishing part 30 of the second polishing line 30, the linear transporter 5 6 f, the first polishing part 3 2 and linear transporter 5 6 Set the expected cleaning start time for the wafer located at e to an invalid value.
- the second polishing part 3 4 of the second polishing line 30 When a serious failure occurs in the second polishing part 3 4 of the second polishing line 30 at the lowered position of the pusher 60 d, the second polishing part 3 4, the linear transporter 5 6 f, the first polishing part 3 2 and Linear transporter 5 6 Sets the expected cleaning start time for the wafer located at e to an invalid value.
- the linear transporter 5 6 g, the second polishing part 3 4, the transporter 5 6 f The expected cleaning start time for the wafers located in the first polishing unit 3 2 and linear transporter 5 6 e is set to an invalid value.
- all wafers located in the polisher are processed at the time of interlock without inserting a new wafer into the polisher.
- the estimated cleaning start time of the wafer located upstream from the unit where the error occurred is set to an invalid value (for example, 1), and is not referenced when calculating the expected cleaning start time for subsequent wafers. If there is a wafer with an invalid cleaning start time on the linear transporter, the transfer management task does not allow the wafer transfer operation from the linear transporter to the top ring.
- the estimated cleaning start time of the wafer located in the linear transporter 56 a is set to an invalid value.
- the expected cleaning start time of the wafer located at the linear transporter 56 e is set to an invalid value.
- the expected cleaning start time of the wafer located upstream of the unit where the wafer where the process is stopped is located. Is set to an invalid value (for example, 1) and is not referenced when calculating the expected cleaning start time for subsequent wafers. If there is a wafer with an invalid cleaning start time on the linear transporter, the transfer management task does not allow the wafer transfer operation from the linear spoke to the top ring.
- the wafers located in the first polishing part 22 and the linear transporter 56 a Set the expected cleaning start time to an invalid value.
- the second polishing section 24 of the first polishing line 20 When a wafer that has been temporarily stopped is positioned in the second polishing section 24 of the first polishing line 20, the second polishing section 24, the rear air transporter 5 6 b, and the first polishing section 2 2 and linear transporter 5 6 Set the expected cleaning start time for the wafer located at a to an invalid value.
- the second polishing part 3 4 of the second polishing line 30 If the wafer that has been paused is positioned in the second polishing part 3 4 of the second polishing line 30, the second polishing part 3 4, the rear air transporter 5 6 f, and the first polishing part 3 2 and linear transporter 5 6 Sets the expected cleaning start time for the wafer located at e to an invalid value.
- the expected time is recalculated only for wafers whose expected cleaning start time is invalid.
- the recalculation is performed in order from the shortest time required for conveyance to the second reversing machine 5 2 b.
- the conveyance time from each position to the second reversing machine 5 2 b is as follows.
- the transfer time from the first polishing unit 22 of the first transfer line 20 to the second reversing machine 52 b is the following total time.
- the processing time of the first processing unit 22 and the processing time of the second processing unit 24 of the first transport line 20 are not touched down (the top ring is not in contact with the polishing table, that is, polishing is not started).
- the average value for each job unit is used as before, and the average value of the same recipe in the past is used for the first wafer of the job. If there is no past average, use the recipe setting time (total processing time of the polishing step). If the touchdown has been completed, set the processing time to "0". The same applies to the processing time of the first processing unit 32 and the second processing unit 34 of the second transport line 30 described below.
- the transfer time from the second polishing unit 24 force of the first transfer line 20 to the second reversing machine 52 b is the following total time.
- the transfer time from the first polishing section 32 of the second transfer line 30 to the second reversing machine 52 b is the following total time.
- the transfer time from the second polishing section 3 4 force of the second transfer line 30 to the second reversing machine 5 2 b is the following total time.
- the “cleaning start expected time” and “wafer position data in the cleaning unit 40 when the first cleaning machine 4 2 a arrives” (Hereinafter referred to as wafer map) is calculated, and based on these data, the polishing start timing is controlled so that the wafer arrives at the second reversing machine 5 2 b without waiting after the completion of the second polishing. As a result, the time from the end of polishing to the start of cleaning can be minimized.
- the present invention can be applied to a polishing apparatus that polishes a polishing object such as a semiconductor wafer into a mirror surface having a flat force and a program stored in a control unit of the polishing apparatus.
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KR1020097023789A KR101430053B1 (ko) | 2007-04-20 | 2008-04-17 | 연마장치 및 그 프로그램 |
JP2009511893A JP5023146B2 (ja) | 2007-04-20 | 2008-04-17 | 研磨装置及びそのプログラム |
CN2008800128309A CN101663739B (zh) | 2007-04-20 | 2008-04-17 | 研磨装置 |
EP08740808.4A EP2141737B1 (en) | 2007-04-20 | 2008-04-17 | Polishing apparatus and program thereof |
US12/596,333 US8206197B2 (en) | 2007-04-20 | 2008-04-17 | Polishing apparatus and program thereof |
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WO2021054236A1 (ja) * | 2019-09-18 | 2021-03-25 | 株式会社荏原製作所 | 機械学習装置、基板処理装置、学習済みモデル、機械学習方法、機械学習プログラム |
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CN102623369A (zh) * | 2012-03-31 | 2012-08-01 | 上海宏力半导体制造有限公司 | 一种晶圆检验方法 |
JP2014167996A (ja) * | 2013-02-28 | 2014-09-11 | Ebara Corp | 研磨装置および研磨方法 |
JP2015090890A (ja) * | 2013-11-05 | 2015-05-11 | 株式会社荏原製作所 | 基板処理装置 |
JP2022072570A (ja) * | 2020-10-30 | 2022-05-17 | 株式会社荏原製作所 | 基板処理装置においてカセットからの基板の取り出しタイミングを決定する方法、装置、プログラム、および基板処理装置 |
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KR20150117602A (ko) * | 2014-04-10 | 2015-10-20 | 가부시키가이샤 에바라 세이사꾸쇼 | 기판 처리 장치 |
KR102168354B1 (ko) | 2014-04-10 | 2020-10-22 | 가부시키가이샤 에바라 세이사꾸쇼 | 기판 처리 장치 |
WO2021054236A1 (ja) * | 2019-09-18 | 2021-03-25 | 株式会社荏原製作所 | 機械学習装置、基板処理装置、学習済みモデル、機械学習方法、機械学習プログラム |
JP2021048213A (ja) * | 2019-09-18 | 2021-03-25 | 株式会社荏原製作所 | 機械学習装置、基板処理装置、学習済みモデル、機械学習方法、機械学習プログラム |
JP7224265B2 (ja) | 2019-09-18 | 2023-02-17 | 株式会社荏原製作所 | 機械学習装置、基板処理装置、学習済みモデル、機械学習方法、機械学習プログラム |
Also Published As
Publication number | Publication date |
---|---|
EP2141737A1 (en) | 2010-01-06 |
TW200903618A (en) | 2009-01-16 |
CN101663739B (zh) | 2011-10-26 |
US8206197B2 (en) | 2012-06-26 |
TWI408741B (zh) | 2013-09-11 |
US20100130103A1 (en) | 2010-05-27 |
JP5023146B2 (ja) | 2012-09-12 |
KR20100019445A (ko) | 2010-02-18 |
KR101430053B1 (ko) | 2014-08-13 |
EP2141737A4 (en) | 2012-06-06 |
EP2141737B1 (en) | 2013-07-03 |
CN101663739A (zh) | 2010-03-03 |
JPWO2008133286A1 (ja) | 2010-07-29 |
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