WO2014199845A1 - 基板処理システム、基板処理方法及びコンピュータ記憶媒体 - Google Patents
基板処理システム、基板処理方法及びコンピュータ記憶媒体 Download PDFInfo
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- WO2014199845A1 WO2014199845A1 PCT/JP2014/064406 JP2014064406W WO2014199845A1 WO 2014199845 A1 WO2014199845 A1 WO 2014199845A1 JP 2014064406 W JP2014064406 W JP 2014064406W WO 2014199845 A1 WO2014199845 A1 WO 2014199845A1
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- substrate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—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
- H01L21/67161—Apparatus for manufacturing or treating in a plurality of work-stations characterized by the layout of the process chambers
- H01L21/67173—Apparatus for manufacturing or treating in a plurality of work-stations characterized by the layout of the process chambers in-line arrangement
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—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
- H01L21/67161—Apparatus for manufacturing or treating in a plurality of work-stations characterized by the layout of the process chambers
- H01L21/67178—Apparatus for manufacturing or treating in a plurality of work-stations characterized by the layout of the process chambers vertical arrangement
Definitions
- the present invention relates to a substrate processing system for thinning a substrate on which a device is formed and a surface of a support substrate is bonded to the surface, a substrate processing method using the substrate processing system, and a computer storage medium.
- wafer a semiconductor wafer having a plurality of devices such as electronic circuits formed on the surface thereof is ground and polished. Then, the wafer is thinned.
- Such thinning of the wafer is performed, for example, by a flattening apparatus described in Patent Document 1.
- a flattening apparatus described in Patent Document 1.
- three chambers, a loading / unloading stage chamber, a grinding processing stage chamber, and a polishing processing stage chamber, are divided through a partition wall.
- the grinding stage chamber is provided with one index type turntable having three sets of chuck tables. These three sets of chuck tables are a chuck table for loading / unloading a wafer, a chuck table for performing rough grinding of the wafer, and a chuck table for performing finish grinding of the wafer.
- a temporary table that can place two or four wafers, three sets of polishing tables that simultaneously polish two wafers, and above the temporary table and the polishing table And one index type head arranged in the head.
- rough grinding, finish grinding, and polishing are sequentially performed to thin the wafer.
- a chuck table that performs rough grinding, a chuck table that performs finish grinding, and a polishing surface plate that performs polishing are fixed in the apparatus.
- the flattening apparatus described in Patent Document 1 has a low degree of freedom in apparatus configuration, and there is room for improvement in processing efficiency.
- the present invention has been made in view of such a point, and an object thereof is to efficiently perform a process of thinning a substrate in a substrate processing system.
- the present invention provides a substrate processing system for thinning a substrate in which a device is formed on a surface and the surface of a support substrate is bonded to the surface.
- a processing station capable of holding a plurality of substrates, and a loading / unloading station for loading / unloading a substrate to / from the processing station, the processing station grinding a back surface of the substrate, A damage layer removing device for removing a damaged layer formed on the back surface of the substrate by grinding with a grinding device; a cleaning device for cleaning the back surface of the support substrate after removing the damaged layer with the damaged layer removing device;
- a substrate transport area for transporting the substrate to the grinding device, the damaged layer removing device, and the cleaning device, and the grinding device, the damaged layer removal
- a plurality of apparatuses and the cleaning apparatus can be arranged in a vertical direction or a horizontal direction, respectively, and the grinding apparatus, the damage layer removing apparatus, and the cleaning apparatus each include a housing that accommodates a substrate therein, and are
- grinding processing for the back surface of the substrate in the grinding device is performed on a plurality of substrates. Can be performed continuously.
- a plurality of grinding devices, damage layer removing devices, and cleaning devices can be arranged in the vertical direction or the horizontal direction, respectively, so that the number of these devices can be arbitrarily set. Therefore, for example, according to the required product specifications, the number of grinding devices, damage layer removal devices, and cleaning devices can be changed, and only the device configuration of any device can be changed. .
- the grinding device, the damaged layer removing device, and the cleaning device can each independently perform a predetermined process, for example, while performing a predetermined process on a substrate in one apparatus
- the apparatus can be removed outside the substrate processing system, and another apparatus can be installed inside the substrate processing system. For this reason, for example, even when an abnormality occurs in one apparatus or maintenance of the apparatus is not performed, it is not necessary to stop other apparatuses, and it is not necessary to stop the entire substrate processing system.
- the degree of freedom of the apparatus configuration can be improved, and the substrate processing can be performed efficiently.
- a substrate processing method for thinning a substrate in which a device is formed on a surface and the surface of a support substrate is bonded to the surface A grinding process for conveying the substrate and grinding the back surface of the substrate in the housing of the grinding device, and then transporting the substrate to the damage layer removing device via the substrate transportation region, and in the housing of the damaged layer removing device
- a damage layer removing step of removing the damaged layer formed on the back surface of the substrate in the grinding step and then transporting the substrate to the cleaning device through the substrate transport region, and the support substrate in the housing of the cleaning device.
- the layer removing device and the cleaning device are each configured to be freely arranged in the vertical direction or the horizontal direction, and the grinding step, the damaged layer removing step, and the cleaning step are respectively optional grinding device and damaged layer removing device. And the cleaning device is selected.
- Another aspect of the present invention is a readable computer storage medium storing a program that operates on a computer of a control device that controls the substrate processing system so that the substrate processing method is executed by the substrate processing system. .
- the degree of freedom of the apparatus configuration of the substrate processing system can be improved, and the substrate thinning process can be efficiently performed in the substrate processing system.
- FIG. 1 is a plan view showing an outline of the configuration of a wafer processing system 1 as a substrate processing system according to the present embodiment.
- 2 and 3 are side views showing an outline of the internal configuration of the wafer processing system 1.
- the wafer W as a substrate is thinned as shown in FIG.
- the wafer W is bonded to the support substrate S via the adhesive G.
- the support substrate S is provided to reinforce the wafer W after the wafer W is thinned in the wafer processing system 1.
- various substrates such as a wafer and a glass substrate are used.
- the joint surface joined to the surface W A of the wafer W to be described later in the support substrate S is called the surface S A, the surface opposite with the surface S A of the rear surface S B.
- the surface W A of the wafer W for example, a device such as a plurality of electronic circuits are formed.
- Surface W A is a bonding surface that is bonded to the surface S A of the supporting substrate S via the adhesive G, the surface of the device W A by the adhesive G is protected.
- a predetermined process of grinding or the like is performed on the rear surface W B of the wafer W, the wafer W is thinned.
- a wafer W having a thickness of 300 ⁇ m to 700 ⁇ m is thinned to a thickness of 100 ⁇ m or less in the wafer processing system 1.
- wafer W is supported by the support substrate S as described above, in the following description, the wafer W supported by the support substrate S may be simply referred to as “wafer W”.
- the wafer processing system 1 includes, for example, a loading / unloading station 2 where a cassette C capable of accommodating a plurality of wafers W is loaded / unloaded, and various processes for performing predetermined processing on the wafer W. It has a configuration in which a processing station 3 provided with the apparatus is integrally connected.
- the cassette loading table 10 is provided at the loading / unloading station 2.
- the cassette mounting table 10 is provided with a plurality of, for example, four cassette mounting plates 11.
- the cassette mounting plates 11 are arranged in a line in the X direction (vertical direction in FIG. 1).
- the cassette C can be placed on these cassette placement plates 11 when the cassette C is carried in and out of the wafer processing system 1.
- the carry-in / out station 2 is configured to be able to hold a plurality of wafers W.
- the number of cassette mounting plates 11 is not limited to the present embodiment, and can be arbitrarily determined.
- a wafer transfer unit 20 is provided adjacent to the cassette mounting table 10.
- the wafer transfer unit 20 is provided with a wafer transfer device 22 that is movable on a transfer path 21 extending in the X direction.
- the wafer transfer device 22 is also movable in the vertical direction and the vertical axis ( ⁇ direction), and is a transition device for a cassette C on each cassette mounting plate 11 and a third processing block G3 of the processing station 3 described later.
- the wafer W can be transferred between 40 and 41. That is, the loading / unloading station 2 is configured to be able to load / unload the wafer W with respect to the processing station 3.
- the wafer transfer device 22 is provided with a position adjusting mechanism (not shown) for adjusting the position of the wafer W.
- the position adjustment mechanism adjusts the orientation of the wafer W while detecting the position of the notch portion of the wafer W, and further centers the wafer W.
- the processing station 3 is provided with a plurality of, for example, three processing blocks G1, G2, G3 provided with various processing devices.
- a first processing block G1 is provided on the X direction positive direction side of the processing station 3
- a second processing block G2 is provided on the X direction negative direction side of the processing station 3.
- a third processing block G3 is provided on the loading / unloading station 2 side (Y direction negative direction side) of the processing station 3.
- a first processing block G1 to the second processing block G2 finish grinding to finish grinding the rough grinding device 30 for rough grinding the back surface W B of the wafer W, the back surface W B of rough grinding wafer W device 31
- a damaged layer removal apparatus 32 for removing the damaged layer formed on the back surface W B of the wafer W by being rough grinding and finish grinding, other cleaning a back surface W B of the wafer W damaged layer has been removed
- a wafer cleaning device 33 as a cleaning device is provided.
- first processing block G1 for example, three rough grinding devices 30 and one finish grinding device 31 are arranged in this order from the carry-in / out station 2 side in the Y direction.
- second processing block G2 for example, one wafer cleaning device 33, one damaged layer removing device 32, and two finish grinding devices 31 are arranged in this order from the loading / unloading station 2 side in the Y direction. .
- the number of the rough grinding apparatus 30, the finish grinding apparatus 31, the damage layer removal apparatus 32, and the wafer cleaning apparatus 33 can be set arbitrarily.
- the processing capability (tact) of the wafer W in the wafer processing system 1 is set to 30 wafers / hour, for example.
- the processing capabilities of the rough grinding device 30 and the finish grinding device 31 are, for example, 10 sheets / hour, respectively, three rough grinding devices 30 and three finish grinding devices 31 are provided.
- the processing capability of the damaged layer removing device 32 and the wafer cleaning device 33 is, for example, 10 sheets / hour, respectively, one damaged layer removing device 32 and one wafer cleaning device 33 are provided.
- the arrangement of the rough grinding device 30, the finish grinding device 31, the damaged layer removal device 32, and the wafer cleaning device 33 can be arbitrarily set.
- the rough grinding device 30, the finish grinding device 31, the damage layer removing device 32, and the wafer cleaning device 33 are arranged side by side in the horizontal direction, but they may be arranged in a stacked manner in the vertical direction.
- transition devices 40 and 41 for the wafer W are provided in two stages in this order from the bottom.
- a wafer transfer region 50 as a substrate transfer region is formed in a region surrounded by the first processing block G1 to the third processing block G3.
- a fan filter unit 51 FFU: Fan Filter Unit
- An exhaust port 52 for exhausting the atmosphere inside the wafer transfer region 50 is formed on the bottom surface of the wafer transfer region 50.
- An exhaust pipe 54 that communicates with a negative pressure generator 53 such as a vacuum pump is connected to the exhaust port 52.
- a wafer transfer device 60 as a substrate transfer device is arranged in the wafer transfer area 50.
- the wafer transfer device 60 moves in the wafer transfer region 50 and can transfer the wafer W to a predetermined device in the surrounding first processing block G1, second processing block G2, and third processing block G3.
- the wafer transfer device 60 has two transfer arms 61 and 62.
- the first transfer arm 61 transfers the wafer W before being cleaned by the wafer cleaning device 33 as will be described later.
- the second transfer arm 62 transfers the wafer W after being cleaned by the wafer cleaning device 33 as will be described later.
- These transfer arms 61 and 62 it is possible to hold the outer peripheral portion of the back surface W B of the wafer W, to hold the wafer W horizontally.
- the first transfer arm 61 for transporting the dirty wafer W before cleaning may hold any location on the back surface W B of the wafer W, for example by holding the center portion of the back surface W B Also good.
- the wafer transfer device 60 is provided with a position adjustment mechanism (not shown) for adjusting the position of the wafer W.
- the position adjustment mechanism adjusts the orientation of the wafer W while detecting the position of the notch portion of the wafer W, and further centers the wafer W.
- An arm drive unit 63 is provided at the base end of the transfer arms 61 and 62. Each arm 61, 62 can move independently in the horizontal direction by the arm driving unit 63.
- the arm driving unit 63 is supported by the base 64.
- the base 64 is provided with a moving mechanism (not shown), and the transfer arms 61 and 62 are configured to be movable up and down by the moving mechanism, and are configured to be rotatable around the vertical axis.
- the rough grinding apparatus 30 includes a housing 30a that can accommodate the wafer W therein.
- a load / unload port 30b for the wafer W is formed on the side surface of the housing 30a on the wafer transfer region 50 side, and an open / close shutter 30c is provided at the load / unload port 30b.
- the rough grinding apparatus 30 of the housing 30a for example, the back surface W B of the wafer W held on the chuck being in contact with the grinding wheel, for grinding the back surface W B by rotating the chuck and the grinding wheel respectively .
- the grinding liquid on the rear surface W B of the wafer W for example, water is supplied.
- casing 30a of the rough grinding apparatus 30 is not limited to this Embodiment, A various structure can be taken.
- the finish grinding apparatus 31 has a housing 31a that can accommodate the wafer W therein.
- a loading / unloading port 31b for the wafer W is formed on the side surface of the housing 31a on the wafer transfer area 50 side, and an opening / closing shutter 31c is provided at the loading / unloading port 31b.
- the configuration of the finish grinding device 31 is substantially the same as the configuration of the rough grinding device 30, but the particle size of the grinding wheel in the finish grinding device 31 is smaller than the particle size of the grinding wheel of the rough grinding device 30. Then, in the housing 31a of the finishing grinding device 31, for example, while supplying the grinding fluid to the back surface W B of the wafer W held on the chuck, being in contact with the back surface W B to the grinding wheel, chuck and grinding grinding the back surface W B by rotating the grinding wheel, respectively.
- the damage layer removing device 32 has a housing 32a that can accommodate the wafer W therein.
- a load / unload port 32b for the wafer W is formed on the side surface of the housing 32a on the wafer transfer region 50 side, and an open / close shutter 32c is provided at the load / unload port 32b.
- the damaged layer removal apparatus 32 In the casing 32a of the damaged layer removing device 32, wet etching is performed using a processing liquid in which, for example, hydrogen fluoride (HF) and nitrous acid (HNO 2 ) are mixed. Then the damaged layer removal apparatus 32, damaged layer formed on the back surface W B of the wafer W by fine grinding device 31 is removed.
- casing 32a of the damage layer removal apparatus 32 can take various structures, if it is a structure which performs wet etching. In this embodiment, a general wet etching configuration is adopted, and detailed description thereof is omitted.
- the wafer cleaning apparatus 33 has a housing 33a that can accommodate the wafer W therein.
- a loading / unloading port 33b for the wafer W is formed on the side surface of the housing 33a on the wafer transfer area 50 side, and an opening / closing shutter 33c is provided at the loading / unloading port 33b.
- the structure in the housing 33a of the wafer cleaning device 33 can take a various structure.
- a high cleanliness cleaning apparatus used in a coating and developing treatment apparatus in a photolithography process for example, a cleaning apparatus described in Japanese Patent Application Laid-Open No. 2008-034437 is used.
- the above wafer processing system 1 is provided with a control device 70 as shown in FIG.
- the control device 70 is a computer, for example, and has a program storage unit (not shown).
- the program storage unit stores a program for controlling the processing of the wafer W in the wafer processing system 1.
- the program storage unit also stores a program for controlling operations of drive systems such as the above-described various processing apparatuses and transfer apparatuses to realize later-described wafer processing in the wafer processing system 1.
- the program is recorded on a computer-readable storage medium H such as a computer-readable hard disk (HD), a flexible disk (FD), a compact disk (CD), a magnetic optical desk (MO), or a memory card. May have been installed in the control device 70 from the storage medium H.
- HD computer-readable hard disk
- FD flexible disk
- CD compact disk
- MO magnetic optical desk
- the pressure in the wafer cleaning device 33 is the highest. Accordingly, the pressure in the wafer cleaning device 33 becomes positive with respect to the pressure in the wafer transfer region 50, and when the opening / closing shutter 33c of the wafer cleaning device 33 is opened, an air flow from the wafer cleaning device 33 toward the wafer transfer region 50 is generated. .
- the pressure in the wafer transfer region 50 is positive with respect to the pressure in the rough grinding device 30, the pressure in the finish grinding device 31, and the pressure in the damaged layer removal device 32. Therefore, when each of the open / close shutters 30c, 31c, and 32c is opened, an air flow is generated from the wafer transfer region 50 toward the rough grinding device 30, the finish grinding device 31, and the damage layer removing device 32.
- a cassette C containing a plurality of wafers W is placed on a predetermined cassette placement plate 11 in the carry-in / out station 2. Thereafter, the wafer W in the cassette C is taken out by the wafer transfer device 22 and transferred to the transition device 40 of the third processing block G3 of the processing station 3.
- the wafer W is transferred to the rough grinding apparatus 30 by the first transfer arm 61 of the wafer transfer apparatus 60.
- an arbitrary rough grinding device 30 is selected from the three rough grinding devices 30 and conveyed.
- the grinding amount of the rough grinding apparatus 30 is set according to the thickness of the wafer W before thinning and the thickness of the wafer W required after thinning.
- the wafer W is transferred to the finish grinding device 31 by the first transfer arm 61 of the wafer transfer device 60.
- any finish grinding apparatus 31 is selected and conveyed.
- fine grinding apparatus 31 while supplying the grinding fluid to the back surface W B of the wafer W held on the chuck, the back surface by being in contact with the back surface W B to the grinding wheel, rotating the chuck and the grinding wheel respectively grinding the W B.
- the wafer W is ground to the thickness after thinning required as a product. Note that the rear surface W B of the wafer W which is finish grinding at the finish grinding device 31, for example, the thickness damaged layer of about 1 ⁇ m is formed.
- the wafer W is transferred to the damaged layer removing device 32 by the first transfer arm 61 of the wafer transfer device 60.
- damaged layer removal apparatus 32 wet etching is performed on the back surface W B of the wafer W, the damaged layer formed on the back surface W B of the wafer W with the grinding device 31 finish as described above is removed.
- the thinned wafer W becomes difficult to break, that is, the reduction in the bending strength of the wafer W can be suppressed.
- the wafer W is transferred to the wafer cleaning device 33 by the first transfer arm 61 of the wafer transfer device 60.
- the wafer cleaning apparatus 33 while rotating the wafer W held by the spin chuck, for supplying pure water onto the rear surface W B of the wafer W. Then, the supplied pure water is diffused over the rear surface W B of the wafer W, the back surface W B is cleaned.
- the wafer W is transferred to the transition device 41 by the second transfer arm 62 of the wafer transfer device 60. Thereafter, the wafer W is transferred to the cassette C of the predetermined cassette mounting plate 11 by the wafer transfer device 22 of the loading / unloading station 2. Thus, a series of wafer processing in the wafer processing system 1 is completed.
- the one in a wafer processing system 1, coarse grinding process of the rear surface W B of the rough grinding device 30 definitive the wafer W, finish grinding of the back surface W B in fine grinding apparatus 31, the damaged layer removing device removal process of the damaged layer in the 32, and the cleaning process of the rear surface W B in wafer cleaning device 33, can be performed continuously for a plurality of wafers W.
- the rough grinding device 30, the finish grinding device 31, the damaged layer removing device 32, and the wafer cleaning device 33 are configured to be arranged in a plurality in a vertical direction or a horizontal direction. Any number between 30 and 33 can be set. Therefore, for example, the number of the rough grinding device 30, the finish grinding device 31, the damaged layer removal device 32, and the wafer cleaning device 33 can be changed according to the required product specifications. It is also possible to change only the device configuration of any of the devices 30 to 33.
- the rough grinding device 30, the finish grinding device 31, the damaged layer removal device 32, and the wafer cleaning device 33 can perform predetermined processing independently of each other, for example, for the wafer W in one device. Even while a predetermined process is being performed, another apparatus can be detached from the wafer processing system 1 and another apparatus can be installed inside the wafer processing system 1. For this reason, for example, even when an abnormality occurs in one apparatus or maintenance of the apparatus is performed, it is not necessary to stop other apparatuses and it is not necessary to stop the entire wafer processing system 1.
- the degree of freedom of the apparatus configuration can be improved, and wafer processing can be performed efficiently.
- the first transfer arm 61 is a transfer arm that transfers the wafer W before being cleaned by the wafer cleaning device 33
- the second transfer arm 62 is cleaned by the wafer cleaning device 33.
- This is a transfer arm for transferring the wafer W.
- the dirty wafer W before cleaning and the clean wafer W after cleaning are transferred by separate transfer arms 61 and 62, particles adhering to one wafer W, for example, the rough grinding device 30, the finish grinding device 31, it is possible to suppress the grinding residue generated by the damaged layer removing device 32 from adhering to another wafer W. Therefore, wafer processing can be performed more appropriately.
- the pressure in the wafer cleaning device 33 is positive with respect to the pressure in the wafer transfer region 50, an air flow from the wafer cleaning device 33 toward the wafer transfer region 50 is generated.
- the atmosphere in the wafer transfer region 50 does not flow into the wafer cleaning device 33, and particles or the like do not flow into the wafer cleaning device 33. Therefore, it is possible to maintain the atmosphere in the wafer cleaning apparatus 33 to clean the cleaning of the back surface W B of the wafer W in the wafer cleaning apparatus 33 can be performed appropriately.
- the pressure in the wafer transfer region 50 is positive with respect to the pressure in the rough grinding device 30 and the pressure in the finish grinding device 31, the rough grinding device 30 and the finish grinding device from the wafer transfer region 50. An air flow toward 31 is generated. In other words, the atmosphere in the rough grinding device 30 and the finish grinding device 31 does not flow into the wafer transfer region 50, and particles such as grinding residue do not flow into the wafer transfer region 50.
- the pressure in the wafer transfer region 50 is positive with respect to the pressure in the damage layer removal device 32, an air flow from the wafer transfer region 50 toward the damage layer removal device 32 is generated.
- the atmosphere in the damaged layer removal device 32 does not flow into the wafer transfer region 50, and the processing liquid used in the damaged layer removal device 32 does not scatter in the wafer transfer region 50.
- the wafer processing can be performed more appropriately.
- the wafer cleaning apparatus 33 for example, since the cleaning device having a high cleanliness, such as those used in the coating and developing system of the photolithographic process is used, it is possible to clean the rear surface W B of the wafer W at a high degree of cleanliness .
- the wafer W thinned by the wafer processing system 1 is then subjected to post-processing such as formation of a through electrode.
- post-processing a photolithography process is performed on the wafer W in order to form the through-holes of the through-electrodes.
- the wafer is subjected to the process before performing the predetermined process. W is washed with high cleanliness.
- the wafer cleaning apparatus 33 of the wafer processing system 1 can clean the wafer W with high cleanliness, it is possible to reduce the subsequent processing burden and to improve the manufacturing efficiency of the product.
- the wet etching is performed in the damaged layer removing device 32.
- the processing is not limited to this as long as it is a process for removing the damaged layer.
- damaged layer removing device 32 for example it may be polished back surface W B of the wafer W.
- CMP chemical mechanical polishing
- a processing liquid (slurry) containing abrasive grains such as silica (SiO 2 ) may be performed, or dry processing without using a processing liquid. Dry polishing may be performed. Be polished in any way, it is possible to remove the damaged layer on the back surface W B of the wafer W.
- the internal configuration of the casing 32a of the damage layer removing device 32 can employ a general configuration for performing chemical mechanical polishing or dry polishing, and a detailed description thereof is omitted.
- the damaged layer removing device 32 for example, dry etching may be performed.
- the general structure which performs dry etching can be employ
- a predetermined etching process is performed in a vacuum atmosphere in the casing 32a of the damaged layer removing device 32. Therefore, as shown in FIG. 6, a load lock device 100 is provided between the wafer transfer region 50 and the damaged layer removing device 32 so that the internal atmosphere can be switched between an air atmosphere and a vacuum atmosphere.
- the load lock device 100 is connected to the wafer transfer region 50 via the gate valve 101 and is connected to the damaged layer removing device 32 via the gate valve 102. Even in such a damaged layer removing device 32, dry etching is performed with respect to the back surface W B of the wafer W, it is possible to remove the damaged layer of the back surface W B.
- the wafer processing system 1 of the above embodiment includes a plug exposure device 200 that exposes plugs provided on the wafer W, a reversing device 201 that reverses the front and back surfaces of the wafer W, and a support substrate S.
- the supporting substrate cleaning apparatus 202 for cleaning a back surface S B may further have.
- the first processing block G1 for example, three rough grinding devices 30 and three finish grinding devices 31 are arranged in this order from the carry-in / out station 2 side in this order.
- one support substrate cleaning device 202, one reversing device 201, one wafer cleaning device 33, one plug exposing device 200, and one damaged layer removing device 32 are provided in a loading / unloading station. Arranged in the Y direction in this order from the second side.
- the number of the rough grinding device 30, the finish grinding device 31, the damaged layer removing device 32, the wafer cleaning device 33, the plug exposing device 200, the reversing device 201, and the supporting substrate cleaning device 202 can be arbitrarily set. Also, the arrangement of these devices can be arbitrarily set. In the present embodiment, the devices are arranged in the horizontal direction, but may be arranged in the vertical direction.
- the plug exposing device 200 has a housing 200a that can accommodate the wafer W therein.
- a loading / unloading port 200b for the wafer W is formed on the side surface of the housing 200a on the wafer transfer area 50 side, and an opening / closing shutter 200c is provided at the loading / unloading port 200b.
- Plug P is provided from the surface W A in the thickness direction in the wafer W as shown in FIG.
- Plug P is, when the back surface W B is grinding the wafer W in the grinding apparatus 31 finish and rough grinding device 30, in a strict sense not exposed on the rear surface W B. Attempting to expose the plug P by grinding the back surface W B with the grinding wheel in the grinding apparatus 31 and the rough grinding device 30 finish, because the plug P is likely to suffer damage by the grinding wheel. Therefore, (the dotted line in FIG. 8) back surface W B of the wafer W is cut thinly by treatment in the plug exposed device 200, the plug P is exposed from the back surface W B.
- wet etching is performed in the casing 200a of the plug exposure apparatus 200 using, for example, an alkaline processing liquid. Then the plug exposed device 200, cutting backside thinning W B of the wafer W as described above, to expose the plug P from the rear surface W B.
- casing 200a of the plug exposure apparatus 200 can take various structures, if it is a structure which performs wet etching. In this embodiment, a general wet etching configuration is adopted, and detailed description thereof is omitted.
- the reversing device 201 has a housing 201a that can accommodate the wafer W therein.
- a loading / unloading port 201b for the wafer W is formed on the side surface of the housing 201a on the wafer transfer area 50 side, and an opening / closing shutter 201c is provided at the loading / unloading port 201b.
- the outer peripheral portion of the wafer W is held and rotated around the horizontal axis by 180 degrees, so that the front and back surfaces of the wafer W are reversed. That is, in the reversing device 201, the back side S B of the supporting substrate S faces upward, front and rear surfaces of the wafer W so as to face the back surface W B is below the wafer W is reversed.
- the support substrate cleaning apparatus 202 has a housing 202a that can accommodate the wafer W (support substrate S) therein.
- a loading / unloading port 202b for the wafer W is formed on the side surface of the housing 202a on the wafer transfer region 50 side, and an opening / closing shutter 202c is provided at the loading / unloading port 202b.
- rough grinding apparatus 30, fine grinding device 31, the grinding scraps generated in the damaged layer removing device 32 may be attached to the rear surface S B of the supporting substrate S flows around the the wafer W, the supporting substrate cleaning apparatus 202, backside S B of such support substrate S is cleaned.
- the housing 202a of the supporting substrate cleaning apparatus 202 for example, while rotating the wafer W (the supporting substrate S), supplies the pure water onto the rear surface S B of the supporting substrate S, for example, the scrubbing implement having a brush It is brought into contact with the rear surface S B. Then, the pure water and scrubbing implement, the rear surface S B of the supporting substrate S is cleaned.
- cleaning apparatus 202 can take a various structure. In the present embodiment, a general scrub cleaning apparatus configuration is adopted, and detailed description thereof is omitted.
- the wafer W thinning process in the wafer processing system 1 shown in FIG. 7 will be described. As described in the above embodiment, the wafer W is transferred to the rough grinding device 30, the finish grinding device 31, and the damaged layer removing device 32, and predetermined processing is performed in each device.
- the wafer W from which the damaged layer has been removed by the damaged layer removing device 32 is transferred to the plug exposing device 200 by the first transfer arm 61 of the wafer transfer device 60.
- the plug exposed device 200 wet etching is performed on the rear surface W B of the wafer W, the back surface W B of the wafer W as described above is cut thin, plug P is exposed from the back surface W B.
- the wafer W is carried to wafer cleaning device 33 by the first transfer arm 61 of the wafer transfer unit 60, the back surface W B of the wafer W is cleaned by the pure water.
- the wafer W is transferred to the reversing device 201 by the first transfer arm 61 of the wafer transfer device 60.
- the front and back surfaces of the wafer W is inverted, the rear surface S B of the supporting substrate S is directed upward.
- the wafer W to the back surface W B is washed with wafer cleaning device 33, which had been conveyed by the second transfer arm 62 of the wafer transfer unit 60, in this embodiment, the One transport arm 61 is transported.
- the wafer W immediately after cleaning the wafer cleaning device 33 is still dirty. For this reason, when the wafer W is transferred from the wafer cleaning device 33 to the reversing device 201, the first transfer arm 61 is used.
- the wafer W is transferred to the support substrate cleaning device 202 by the first transfer arm 61 of the wafer transfer device 60.
- the back side S B of the supporting substrate S is cleaned by pure water and scrubbing implement.
- the wafer W is transferred to the transition device 41 by the second transfer arm 62 of the wafer transfer device 60. Thereafter, the wafer W is transferred to the cassette C of the predetermined cassette mounting plate 11 by the wafer transfer device 22 of the loading / unloading station 2. Thus, a series of wafer processing in the wafer processing system 1 is completed.
- the same effects as those in the above embodiment can be enjoyed. That is, according to the wafer processing system 1, the rough grinding device 30, the finish grinding device 31, the damaged layer removal device 32, the plug exposure device 200, the wafer cleaning device 33, the reversing device 201, and the support substrate cleaning device 202 are independently provided. Therefore, predetermined processing in these apparatuses can be performed continuously, the degree of freedom of the apparatus configuration can be improved, and wafer processing can be performed efficiently.
- the first transfer arm 61 is a transfer arm that transfers the wafer W before being cleaned by the support substrate cleaning device 202
- the second transfer arm 62 is cleaned by the support substrate cleaning device 202.
- This is a transfer arm that transfers the wafer W after the transfer.
- the dirty wafer W before cleaning and the clean wafer W after cleaning are transferred by the separate transfer arms 61 and 62, so that the particles adhering to one wafer W adhere to other wafers W. Can be suppressed. Therefore, wafer processing can be performed more appropriately.
- the pressure in the reversing device 201 and the pressure in the support substrate cleaning device 202 are respectively positive with respect to the pressure in the wafer transfer region 50. Therefore, when each of the open / close shutters 201c and 202c is opened, an air flow from the reversing device 201 and the support substrate cleaning device 202 toward the wafer transfer region 50 is generated.
- This pressure relationship is the same as the pressure relationship between the wafer cleaning apparatus 33 and the wafer transfer region 50 shown in FIG. In this case, the atmosphere in the wafer transfer region 50 does not flow into the reversing device 201 and the support substrate cleaning device 202, and particles or the like do not flow into the reversing device 201 and the support substrate cleaning device 202.
- the pressure in the wafer transfer region 50 is positive with respect to the pressure in the plug exposure device 200. Therefore, when the opening / closing shutter 200c is opened, an air flow from the wafer transfer region 50 toward the plug exposing device 200 is generated.
- This pressure relationship is the same as the pressure relationship between the rough grinding device 30, the finish grinding device 31, the damaged layer removing device 32, and the wafer transfer region 50 shown in FIG. In such a case, the atmosphere in the plug exposure device 200 does not flow into the wafer transfer region 50, and the processing liquid used in the plug exposure device 200 does not scatter in the wafer transfer region 50.
- the damage layer removing process (for example, wet etching) in the damaged layer removing apparatus 32 and the plug exposing process (for example, wet etching) in the plug exposing apparatus 200 are performed. Accordingly, there is a case where the back surface W B of the wafer W is properly cleaned. In such a case, by omitting the wafer cleaning device 33, it may be omitted cleaning processing of the back surface W B of the wafer W in the wafer cleaning apparatus 33.
- the plug P may be exposed by the damage layer removing device 32, for example. Further, depending on the specifications of the product, it may not be necessary to expose the plug P in the first place. In such a case, the plug exposure device 200 may be omitted, and the plug P exposure processing in the plug exposure device 200 may be omitted.
- the wafer processing system 1 of the above embodiment may have an inspection apparatus 300 for inspecting the wafer W after thinning as shown in FIG.
- the inspection apparatus 300 is arranged, for example, on the uppermost layer of the third processing block G3.
- the inspection device 300 for example, using a laser displacement meter, for measuring the surface roughness of the back surface W B of the thickness and the wafer W of the wafer W.
- the measurement of the surface roughness of the thickness and the back surface W B of the wafer W is not limited to the measurement method using a laser beam, it may take a variety of ways. Further, the inspection apparatus 300 may inspect the appearance of the wafer W.
- the inspection apparatus 300 can inspect the wafer W at various timings. For example inspection apparatus 300, the wafer W to the back surface W B at the finish grinding device 31 is ground, the wafer W damage layer is removed with damage layer removal apparatus 32, the wafer W plug P is exposed with the plug exposed 200, a wafer the wafer W backside W B is cleaned in the cleaning device 33, and the wafer W to the back surface S B is cleaned of the supporting substrate S supporting substrate cleaning apparatus 202 can be inspected.
- the wafer W is transferred to the inspection device 300 by the wafer transfer device 60.
- the processing conditions in the rough grinding apparatus 30 and the finish grinding apparatus 31 are corrected by the control apparatus 70. Is done. Specifically, for example, the grinding wheels of the rough grinding device 30 and the finish grinding device 31 are exchanged, or the parallelism between the grinding wheel and the chuck is adjusted.
- the wafer W is transferred to the inspection apparatus 300 by the wafer transfer apparatus 60.
- the result of the inspection of the wafer W in the inspection device 300 for example, when the surface roughness of the back surface W B of the wafer W is not in the desired surface roughness is controlled by the device 70 damaged layer removal apparatus 32 or
- the processing conditions in the plug exposure device 200 are corrected. Specifically, for example, the processing liquid used in the damaged layer removing device 32 or the plug exposing device 200 is replaced or the processing time is adjusted.
- the wafer W after cleaning by the wafer cleaning device 33 or the wafer W after cleaning by the support substrate cleaning device 202 is inspected
- the wafer W is transferred to the inspection device 300 by the wafer transfer device 60.
- the processing conditions in the rough grinding apparatus 30 and the finish grinding apparatus 31 are corrected by the control apparatus 70. Is done.
- the process conditions in the damaged layer removal device 32 is corrected by the control device 70.
- the processing conditions in the rough grinding apparatus 30, the processing conditions in the finish grinding apparatus 31, and the processing conditions in the damaged layer removal apparatus 32 or the plug exposure apparatus 200 are fed back. Since it can be controlled, the wafer processing performed in the wafer processing system 1 can be performed more appropriately thereafter.
- the wafer W is thinned to a thickness of, for example, 100 ⁇ m or less in the wafer processing system 1 .
- the wafer W can be thinned to an arbitrary thickness.
- a protective tape is attached to the wafer W instead of the support substrate S.
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Abstract
Description
本願は、2013年6月13日に日本国に出願された特願2013-124406号、及び2014年5月27日に日本国に出願された特願2014-109233号に基づき、優先権を主張し、その内容をここに援用する。
2 搬入出ステーション
3 処理ステーション
22 ウェハ搬送装置
30 粗研削装置
30a 筐体
31 仕上研削装置
31a 筐体
32 ダメージ層除去装置
32a 筐体
33 ウェハ洗浄装置
33a 筐体
50 ウェハ搬送領域
51 ファンフィルターユニット
52 排気口
60 ウェハ搬送装置
61 第1の搬送アーム
62 第2の搬送アーム
70 制御装置
200 プラグ露出装置
200a 筐体
201 反転装置
201a 筐体
202 支持基板洗浄装置
202a 筐体
300 検査装置
G1 第1の処理ブロック
G2 第2の処理ブロック
G3 第3の処理ブロック
P プラグ
S 支持基板
SA 表面
SB 表面
W ウェハ
WA 表面
WB 表面
Claims (27)
- 表面にデバイスが形成され、さらに当該表面に対して支持基板の表面が接合された基板を薄化する基板処理システムであって、
基板に所定の処理を行う処理ステーションと、
基板を複数保有可能で、且つ前記処理ステーションに対して基板を搬入出する搬入出ステーションと、を有し、
前記処理ステーションは、
基板の裏面を研削する研削装置と、
前記研削装置で研削することで基板の裏面に形成されたダメージ層を除去するダメージ層除去装置と、
前記ダメージ層除去装置で前記ダメージ層を除去した後、支持基板の裏面を洗浄する洗浄装置と、
前記研削装置、前記ダメージ層除去装置及び前記洗浄装置に対して、基板を搬送するための基板搬送領域と、を有し、
前記研削装置、前記ダメージ層除去装置及び前記洗浄装置は、それぞれ鉛直方向又は水平方向に複数配置自在であり、
且つ前記研削装置、前記ダメージ層除去装置及び前記洗浄装置は、それぞれ内部に基板を収容する筐体を備え、それぞれ独立して前記筐体内で基板に所定の処理を行う。 - 請求項1に記載の基板処理システムであって、
前記基板搬送領域には、基板を保持して搬送する基板搬送装置が設けられ、
前記基板搬送装置は、前記洗浄装置で支持基板の裏面が洗浄される前の基板を搬送する第1の搬送アームと、前記洗浄装置で支持基板の裏面が洗浄された後の基板を搬送する第2の搬送アームとを有する。 - 請求項1に記載の基板処理システムであって、
前記研削装置の圧力及び前記ダメージ層除去装置内の圧力は、それぞれ前記基板搬送領域内の圧力に対して陰圧であり、
前記洗浄装置内の圧力は前記基板搬送領域内の圧力に対して陽圧である。 - 請求項1に記載の基板処理システムであって、
前記ダメージ層除去装置は、ウェットエッチング、ドライエッチング又は研磨を行うことによって前記ダメージ層を除去する。 - 請求項1に記載の基板処理システムであって、
前記洗浄装置は、支持基板の裏面に純水を供給して洗浄する。 - 請求項1に記載の基板処理システムであって、
前記ダメージ層除去装置で前記ダメージ層を除去した後であって、前記洗浄装置で支持基板の裏面を洗浄する前に、基板の裏面を洗浄する他の洗浄装置をさらに有する。 - 請求項6に記載の基板処理システムであって、
前記他の洗浄装置内の圧力は前記基板搬送領域内の圧力に対して陽圧である。 - 請求項6に記載の基板処理システムであって、
前記他の洗浄装置は、基板の裏面に純水を供給して洗浄する。 - 請求項1に記載の基板処理システムであって、
前記ダメージ層除去装置で前記ダメージ層を除去した後であって、前記洗浄装置で支持基板の裏面を洗浄する前に、基板の表裏面を反転させる反転装置をさらに有する。 - 請求項1に記載の基板処理システムであって、
基板には表面から厚み方向に伸びるプラグが設けられ、
前記ダメージ層除去装置で前記ダメージ層を除去した後であって、前記洗浄装置で支持基板の裏面を洗浄する前に、前記プラグを露出させるプラグ露出装置をさらに有する。 - 請求項10に記載の基板処理システムであって、
前記プラグ露出装置は、ウェットエッチングを行うことによって前記プラグを露出させる。 - 請求項1に記載の基板処理システムであって、
前記研削装置で研削された基板、前記ダメージ層除去装置で前記ダメージ層が除去された基板、又は前記洗浄装置で支持基板の裏面が洗浄された基板を検査する検査装置をさらに有する。 - 請求項12に記載の基板処理システムであって、
前記検査装置における検査結果に基づいて、前記研削装置又は前記ダメージ層除去装置における処理条件を補正する制御装置をさらに有する。 - 表面にデバイスが形成され、さらに当該表面に対して支持基板の表面が接合された基板を薄化する基板処理方法であって、
基板搬送領域を介して研削装置に基板を搬送し、当該研削装置の筐体内において基板の裏面を研削する研削工程と、
その後、前記基板搬送領域を介してダメージ層除去装置に基板を搬送し、当該ダメージ層除去装置の筐体内において、前記研削工程で基板の裏面に形成されたダメージ層を除去するダメージ層除去工程と、
その後、前記基板搬送領域を介して洗浄装置に基板を搬送し、当該洗浄装置の筐体内において支持基板の裏面を洗浄する洗浄工程と、を有し、
前記研削工程、前記ダメージ層除去工程及び前記洗浄工程を複数の基板に対して連続して行い、
且つ前記研削装置、前記ダメージ層除去装置及び前記洗浄装置は、それぞれ鉛直方向又は水平方向に複数配置自在に構成され、前記研削工程、前記ダメージ層除去工程及び前記洗浄工程は、それぞれ任意の前記研削装置、前記ダメージ層除去装置及び前記洗浄装置を選択して行われる。 - 請求項14に記載の基板処理方法であって、
前記基板搬送領域には、基板を保持して搬送する2つの搬送アームを備えた基板搬送装置が設けられ、
前記洗浄工程が終了するまでの基板の搬送は、前記基板搬送装置の第1の搬送アームによって行われ、
前記洗浄工程が終了後の基板の搬送は、前記基板搬送装置の第2の搬送アームによって行われる。 - 請求項14に記載の基板処理方法であって、
前記研削装置の圧力及び前記ダメージ層除去装置内の圧力は、それぞれ前記基板搬送領域内の圧力に対して陰圧であり、
前記洗浄装置内の圧力は前記基板搬送領域内の圧力に対して陽圧である。 - 請求項14に記載の基板処理方法であって、
前記ダメージ層除去工程において、ウェットエッチング、ドライエッチング又は研磨を行うことによって前記ダメージ層を除去する。 - 請求項14に記載の基板処理方法であって、
前記洗浄工程において、支持基板の裏面に純水を供給して洗浄する。 - 請求項14に記載の基板処理方法であって、
前記ダメージ層除去工程後であって前記洗浄工程前に、前記基板搬送領域を介して他の洗浄装置に基板を搬送し、当該他の洗浄装置の筐体内において基板の裏面を洗浄する他の洗浄工程をさらに有する。 - 請求項19に記載の基板処理方法であって、
前記他の洗浄装置内の圧力は前記基板搬送領域内の圧力に対して陽圧である。 - 請求項19に記載の基板処理方法であって、
前記他の洗浄工程において、基板の裏面に純水を供給して洗浄する。 - 請求項14に記載の基板処理方法であって、
前記ダメージ層除去工程後であって前記洗浄工程前に、前記基板搬送領域を介して反転装置に基板を搬送し、当該反転装置の筐体内において基板の表裏面を反転させる反転工程をさらに有する。 - 請求項14に記載の基板処理方法であって、
基板には表面から厚み方向に伸びるプラグが設けられ、
前記ダメージ層除去工程後であって前記洗浄工程前に、前記基板搬送領域を介してプラグ露出装置に基板を搬送し、当該プラグ露出装置の筐体内において前記プラグを露出させるプラグ露出工程をさらに有する。 - 請求項23に記載の基板処理方法であって、
前記プラグ露出工程において、ウェットエッチングを行うことによって前記プラグを露出させる。 - 請求項14に記載の基板処理方法であって、
前記研削工程後、前記ダメージ層除去工程後、又は前記洗浄工程後、前記基板搬送領域を介して検査装置に基板を搬送し、当該検査装置において基板を検査する検査工程をさらに有する。 - 請求項25に記載の基板処理方法であって、
前記検査工程における検査結果に基づいて、前記研削工程又は前記ダメージ層除去工程における処理条件を補正する。 - 表面にデバイスが形成され、さらに当該表面に対して支持基板の表面が接合された基板を薄化する基板処理方法を基板処理システムによって実行させるように、当該基板処理システムを制御する制御装置のコンピュータ上で動作するプログラムを格納した読み取り可能なコンピュータ記憶媒体であって、
前記基板処理方法は、
基板搬送領域を介して研削装置に基板を搬送し、当該研削装置の筐体内において基板の裏面を研削する研削工程と、
その後、前記基板搬送領域を介してダメージ層除去装置に基板を搬送し、当該ダメージ層除去装置の筐体内において、前記研削工程で基板の裏面に形成されたダメージ層を除去するダメージ層除去工程と、
その後、前記基板搬送領域を介して洗浄装置に基板を搬送し、当該洗浄装置の筐体内において支持基板の裏面を洗浄する洗浄工程と、を有し、
前記研削工程、前記ダメージ層除去工程及び前記洗浄工程を複数の基板に対して連続して行い、
且つ前記研削装置、前記ダメージ層除去装置及び前記洗浄装置は、それぞれ鉛直方向又は水平方向に複数配置自在に構成され、前記研削工程、前記ダメージ層除去工程及び前記洗浄工程は、それぞれ任意の前記研削装置、前記ダメージ層除去装置及び前記洗浄装置を選択して行われる。
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CN105308725B (zh) | 2016-09-14 |
TWI613717B (zh) | 2018-02-01 |
JP2015019053A (ja) | 2015-01-29 |
TWI664670B (zh) | 2019-07-01 |
JP6093328B2 (ja) | 2017-03-08 |
CN105308725A (zh) | 2016-02-03 |
TW201515080A (zh) | 2015-04-16 |
TW201828348A (zh) | 2018-08-01 |
KR20160003873A (ko) | 2016-01-11 |
KR101629627B1 (ko) | 2016-06-13 |
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