WO2005070620A1 - 両頭平面研削装置 - Google Patents
両頭平面研削装置 Download PDFInfo
- Publication number
- WO2005070620A1 WO2005070620A1 PCT/JP2004/013526 JP2004013526W WO2005070620A1 WO 2005070620 A1 WO2005070620 A1 WO 2005070620A1 JP 2004013526 W JP2004013526 W JP 2004013526W WO 2005070620 A1 WO2005070620 A1 WO 2005070620A1
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- WO
- WIPO (PCT)
- Prior art keywords
- work
- grinding
- support
- workpiece
- double
- Prior art date
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Classifications
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- 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
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/061—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically
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- 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
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/10—Single-purpose machines or devices
- B24B7/16—Single-purpose machines or devices for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings
- B24B7/17—Single-purpose machines or devices for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings for simultaneously grinding opposite and parallel end faces, e.g. double disc grinders
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- 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
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
-
- 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
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories 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
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
- B24B7/22—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain
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- 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
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
- B24B7/22—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain
- B24B7/228—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain for grinding thin, brittle parts, e.g. semiconductors, wafers
Definitions
- the present invention relates to a double-sided surface grinding apparatus for grinding both surfaces of a thin plate-shaped work such as a semiconductor wafer.
- the double-sided flat surface grinding device described in Patent Document 1 includes a pair of grinding wheels rotatably supported so that the grinding surfaces face each other, and a thin plate-shaped work, at least a part of a surface to be ground on both surfaces thereof.
- a work rotation support means that is rotatably supported on a rotation axis parallel to the rotation axis of the grinding gantry while the workpiece is positioned at the grinding position between the grinding surfaces of the grinding gantry, and grinding on the work surface to be ground.
- a pair of non-contact support means arranged to sandwich substantially the entire surface of the area outside the position on both sides of the force, and non-contact support means for non-contact support of the workpiece by the pressure of the fluid, and the peak is supported by the non-contact support means
- the diameter of the grinding surface of the grinding cannon is formed to be substantially the same as or slightly larger than the radius of the work.
- the relative positional relationship between the grinding cannon and the workpiece is set so that the grinding surface of the grinding cannon always covers both the center of the surface to be ground of the workpiece and part of the outer periphery. As a result, the entire surface of the workpiece can be ground evenly by the grinding gantry.
- the non-contact support surface of the non-contact support means in this type of double-sided surface grinding apparatus generally has, for example, a shape as shown in FIG. That is, the substantially circular outer edge-side force also extends beyond at least the center position B of the workpiece to form an arc-shaped notch 111, and a grinding cannon stone 112 is arranged in the notch 111. .
- a plurality of recessed pocket portions 113 having a substantially uniform depth are arranged on the non-contact support surface, and a plurality of pocket portions 113 are formed through fluid supply holes (not shown) provided on the inner walls of these pocket portions 113. So that fluid such as water is discharged It has become.
- the pockets 113 are arranged in a plurality of rows (here, two rows) in the radial direction so as to be substantially concentric with the center B of the work. That is, the mesh-like mesh portion 114 that forms the bank around the pocket portion 113 is divided into a plurality of peripheral portions 114a arranged along the outer periphery of the non-contact support surface and a region inside the peripheral portion 114a.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2000-280155 discloses a plurality of internal / external connecting portions 115 and an inner vein portion 114b connected to a peripheral edge portion 114a.
- the present invention eliminates concentric corrugations generated on a work surface by grinding to further improve the flatness of the work surface after grinding. It is an object to provide a surface grinding device.
- this is one of the causes of generating a wavy shape on the wafer surface after the grinding due to the turbulent force of the temperature distribution around the notch 111.
- the pocket 113 and the mesh 114 By arranging the pocket 113 and the mesh 114 so that the number of internal and external connection parts 115 existing in the area is minimized, disturbance of the temperature distribution around the notch 111 is minimized, and by grinding the work It is considered that concentric wave shapes generated on the surface can be suppressed.
- the present invention provides a pair of grinding cannons that are rotatably supported so that the grinding surfaces face each other, and a thin plate-like work, in which at least a part of the grinding surfaces on both surfaces is ground by the grinding.
- a work rotation support means rotatably supporting a rotation axis parallel to the rotation axis of the grinding gantry in a state of being disposed at a grinding position between the surfaces;
- a pair of non-contact support means arranged so as to sandwich substantially the entire outer region from both sides and supporting the work in a non-contact manner by the pressure of a fluid, wherein the work is supported by the non-contact support means.
- the non-contact support means may have a small amount from its substantially circular outer edge side.
- a substantially arc-shaped notch portion corresponding to the grinding wheel is formed beyond the center position of the work, and a non-contact support surface facing the work is formed in a concave shape and has an inner wall.
- a plurality of pockets provided with one or more fluid supply holes for discharging the fluid
- a mesh portion forming a bank around the pocket portion includes a peripheral portion arranged along the outer periphery of the non-contact support surface, and a mesh portion inside the peripheral portion.
- a plurality of inner and outer connection portions are arranged so as to divide the region into a plurality of inner and outer connection portions, and the inner vein portion is connected to the peripheral portion.
- a portion of the peripheral portion along the cutout portion is
- the inside / outside connection portion is provided at least in a portion excluding the vicinity of the center position of the work, and is characterized in that it is provided.
- the position of the inside / outside connection portion existing along the periphery of the notch portion of the non-contact support means can be at least only in the vicinity of the center position of the work.
- the disturbance of the temperature distribution around the notch can be limited to only the position corresponding to the vicinity of the outer periphery of the work w, or only the position corresponding to the vicinity of the outer periphery and the center of the work W.
- the fluid supply hole in the pocket portion provided along the notch portion is provided in the vicinity of the inside / outside connection portion and the connection portion between the inner peripheral portion provided along the notch portion and the other outer peripheral portion. Since the fluid supplied from the fluid supply hole first passes through the vicinity of the inside / outside connection portion, the vicinity of the inside / outside connection portion can be effectively cooled, and the work after grinding can be effectively disposed. Can be further suppressed.
- the pocket portion provided along the notch portion to have a substantially equal width in the radial direction along the circumferential direction of the grinding gantry, the heat conduction characteristic around the notch portion is reduced. It can be made substantially constant along the notch, so that the concentric wavy shape generated in the workpiece after grinding can be further suppressed.
- FIGS. 1 to 13 illustrate a first embodiment of the present invention.
- the lower side in FIG. 1 is referred to as front, the upper side as rear, and the left and right as left and right.
- reference numeral 1 denotes a double-sided surface grinding device, which is a work drive device 2 that holds and rotates a thin disk-shaped workpiece W such as a semiconductor wafer, and a work drive device 2.
- a grinding wheel device 4 is provided for grinding both sides of the workpiece W to be held and rotated by a grinding wheel 3.
- the work drive device 2 and the gantry device 4 are detachably fixed on a horizontal bed 5.
- the work drive device 2 holds and rotates the work W when grinding both surfaces of the work W.
- the work holding device 6 holds the work W from its peripheral edge and both sides.
- Slide drive mechanism that slides with respect to 9
- an outer case 10 that supports the inner case 8 and covers the outside thereof.
- the outer case 10 is formed in a substantially rectangular box shape with an upper side opening by a base portion 11 fixed substantially horizontally to the upper surface of the bed 5 and front, rear, left and right side wall plates 12a-12d.
- the front side of the outer case 10 is provided with front support means 13 for supporting the front side of the inner case 8, and the rear side is provided with rear support means 14 for supporting the rear side of the inner case 8.
- the front support means 13 supports the inner case 8 so as to be swingable at the front side thereof.
- the front support means 13 includes a pair of bearing portions 15a, 15b provided on the front upper portions of the left and right side wall plates 12c, 12d, respectively.
- a support rod 16 is installed horizontally between the left and right side wall plates 12c and 12d and rotatably supported at both ends by bearings 15a and 15b.
- the support rod 16 is inserted into through holes 18 of a support bracket 17 provided on the front left and right sides of the inner case 8 and is fixed to the support bracket 17 by fixing bolts 19. That is, the inner case 8 is swingably supported by the support rod 16 via the support bracket 17 on the front side.
- the rear support means 14 is for supporting the inner case 8 at the rear side so that the height position can be adjusted.
- the rear support means 14 is rotated around a left-right axis by a bracket 20 provided on the front upper portion of the rear wall plate 12b.
- a cam 21 that is freely supported, and a drive motor 23 that is detachably fixed to, for example, the outside of the left side wall plate 12c and that drives the cam 21 to rotate via a drive shaft 22.
- a support roller 24 provided on the rear side of 8 is mounted.
- the drive motor 23 When the drive motor 23 is operated, the cam 21 rotates via the drive shaft 22 and the position of the support roller 24 placed on the cam 21 moves up and down. That is, the inner case 8 is supported by the cam 21 on the outer case 10 side via the support roller 24 on the rear side so that the height position can be adjusted.
- a dressing device 25 for dressing the grinding wheel 3 is arranged at a lower part in the outer case 10.
- the dressing device 25 is detachably fixed to the bed 5, for example.
- the inner case 8 is formed in a substantially rectangular box shape whose upper and lower sides are opened by front and rear and left and right side wall plates 31a to 31d, and is disposed, for example, on the upper side in the outer case 10.
- the support brackets 17 are fixed to the front left and right sides of the front wall plate 31a, respectively, and the support rollers 24 are rotatably supported on the rear upper portion of the rear wall plate 31b around the left and right axes.
- an opening 30 is formed in the front side wall plate 31a in the left-right direction, and a thickness measuring means 32 is disposed in the opening 30 so as to be movable in the left-right direction.
- the thickness measuring means 32 is for measuring the thickness of the workpiece W after grinding.
- the thickness measuring means 32 is mounted on a support plate 42a which will be described later, is formed in a rod shape long in the front-rear direction, and has a tip side.
- a pair of measuring arms 33 each having a measuring end 33a at the (rear end), a front-rear guide rail 34 arranged vertically above and below these measuring arms 33, and a measuring arm 33 at its front end.
- the main body 35 is supported and slidably supported in the front-rear direction by a guide rail 34
- the rack 36 is fixed to the main body 35 in the front-rear direction, and is disposed near the main body 35, for example, on the lower side.
- a drive motor 37 is provided for moving the main body 35 in the front-rear direction along the guide rails 34 by rotating and driving the pione 37a fitted to the rack 36.
- the work holding means 6 is constituted by left and right work holding bodies 41a and 41b which are arranged to face each other and are supported by the inner case 8 so as to be movable in the left and right directions.
- These work holders 41a and 41b are each composed of a pair of support plates 42a and 42b arranged in parallel to the vertical plane in the front-rear direction, and a pair of supports provided on the opposing surfaces of the support plates 42a and 42b.
- Pads (non-contact support means) 43a and 43b are provided.
- the support pads 43a and 43b are for supporting the work W in a non-contact manner on both sides by the pressure of a fluid such as water, and are formed in a substantially disk shape.
- An arc-shaped notch 44 for the grinding wheel corresponding to the grinding wheel 3 is formed upward from the outer edge side to a position slightly beyond the center position A of the support pads 43a, 43b.
- FIG. 8 to FIG. 10 show the support pad 43a on the left work support 41a side. Since the shape of the support pad 43b on the right work support 41b side is also substantially the same as that of the support pad 43a, an enlarged drawing of the support pad 43b side is omitted, and differences will be described each time.
- a step portion 46 having a predetermined width is formed on the opposing surface side of the support pads 43a and 43b along the outer edge side excluding the cutout portion 44 for gantry, one step lower than the inner non-contact support surface 45. It has been. Further, at a predetermined position of the step portion 46, for example, at the uppermost position, a recessed portion 47 which is recessed in an arc shape toward the center position A is formed. In the servo pad 43a on the left work support 41a side, a through hole 47a concentric with the recess 47 is provided at the center of the recess 47. It is formed in the thickness direction (left-right direction). Only the recess 47 is formed on the support pad 43b side, and the through hole 47a is not formed.
- a plurality of pocket portions 51 that are recessed in the plate thickness direction are formed on the non-contact support surfaces 45 of the support pads 43a and 43b, that is, on the portions inside the step portions 46 on the opposing surface side.
- a portion other than the pocket portion 51 is a mesh-like mesh portion 52 forming a bank of the pocket portion 51.
- the mesh portion 52 is provided with a peripheral portion 53 provided along the outer periphery of the non-contact support surface 45, and a plurality of internal / external connection portions 52a provided so as to divide an area inside the peripheral portion 53 into a plurality. And an inner vein portion 54 connected to the peripheral portion 53. Further, the peripheral portion 53 is composed of an inner peripheral portion 53a provided along the gantry notch portion 44 and the other outer peripheral portion 53b, and the inner peripheral portion 53a and the outer peripheral portion 53b are formed. Are connected to each other at both ends of the notch 44 for the grinding wheel.
- a groove 55 having a predetermined width is formed in the inner vein portion 54 so as to pass through substantially the center in the width direction.
- the groove portion 55 functions as a discharge passage for the fluid discharged from the fluid supply hole 62 described later into the pocket portion 51, and crosses or branches at each intersection or branch portion of the internal vein portion 54.
- the ends thereof communicate with the step portion 46 or the cutout portion 44 for gantry across the peripheral portion 53, respectively.
- the depth of the groove 55 is formed smaller than the depth of the step 46.
- a separation detection sensor hole 56 is formed.
- the distance detecting sensor hole 56 is connected to, for example, a fluid supply source through a communication passage (not shown) in the support pads 43a and 43b, and a predetermined distance detecting means (not shown) is provided. The distances between the servo pads 43a and 43b and the workpiece W are detected based on the air pressure of the fluid supply source!
- a predetermined position on the peripheral edge 53 for example, the vicinity of the uppermost position on the outer peripheral edge 53b (near both sides of the recess 47) and the center of the vertical direction.
- a total of six seat detection sensor holes 58 are formed.
- This seat detection sensor hole 58 is connected to, for example, a negative pressure source through a communication passage 59 in the support pad 43a.
- the predetermined seating detecting means (not shown) detects the presence or absence of the workpiece W based on the fluctuation of the load of the negative pressure source!
- the peripheral portion 53 is formed widely on the inner pocket portion 51 side in the vicinity of the sensor holes 56, 58 for securing a constant width around the sensor holes 56, 58.
- the seating detection sensor hole 58 is not formed in the support pad 43b on the right parking support 41b side, but the mesh portion 52 is formed in substantially the same shape as the support pad 43a side.
- the non-contact support surface 45 is divided into a mesh shape by the mesh portion 52 as described above, in the present embodiment, six pocket portions 51 are provided on each of the support pads 43a and 43b, respectively. It is arranged so as to be substantially symmetrical with respect to a vertical axis passing through A. Of these six pockets 51, two pockets 51a, 51b are arranged adjacent to each other along the cutout 44 for gantry, and are located between the two pockets 51a, 51b.
- the inside and outside connection part 52a is provided. That is, in the support pads 43a and 43b of the present embodiment, the inner / outer connecting portion 52a is located at one location near the center position A on the inner peripheral portion 53a along the grindstone notch portion 44 of the peripheral portion 53.
- the inner and outer connecting portions 52a are provided at other positions on the inner peripheral portion 53a.
- the two pockets 51a and 51b arranged along the cutout portion 44 for gantry are formed along the circumferential direction of the cutout portion 44 for gantry, that is, along the circumferential direction of the grinding gantry 3. It is formed to be approximately the same width in the radial direction.
- the remaining four pockets 51c-51f have the remaining area divided by the portion of the inner vein 54 arranged in the radial direction of the work W so as to have substantially the same area. Is formed.
- one or more fluid passages 60 are disposed in the plane of the support pads 43a and 43b, respectively. These fluid passages 60 are all in communication by crossing each other. Also, on the back side of the support pads 43a and 43b (opposite the facing surface), a fluid supply port 61 communicating with the fluid passage 60 is provided above a predetermined position corresponding to the mesh portion 52, for example, above the center position A. It is formed in a concave shape on the surface side. The outer peripheral surface side end 60a of the fluid passage 60 is completely closed.
- each pocket 51 one or more fluid supply holes 62 for discharging a fluid are formed in the inner wall thereof. All of the fluid supply holes 62 are formed at positions along the fluid passage 60. And is connected to the fluid passage 60 through a connection passage 63 formed in the thickness direction of the support pads 43a and 43b.
- the two pocket portions 51a and 51b provided along the gantry notch portion 44 are provided with a plurality of fluid supply holes 62, for example, five fluid supply holes 62, respectively.
- Reference numeral 62 is intensively disposed near the inner / outer connecting portion 52a and near a connecting portion 64 between the inner peripheral portion 53a and the outer peripheral portion 53b.
- the support pads 43a and 43b have a predetermined depth on the outer peripheral side excluding the gangway notch 44, for example, a predetermined depth inward (center side) from a substantially central position in the vertical direction on the rear side.
- the notch 65 for the thickness sensor is formed, for example, in the horizontal direction.
- the support plates 42a and 42b are formed in a substantially rectangular shape whose vertical dimension is substantially equal to that of the support pads 43a and 43b, and whose front and rear dimensions are larger than those of the support pads 43a and 43b.
- the support pads 43a and 43b are, for example, detachably fixed substantially at the center.
- the support plates 42a and 42b are formed with notches 70 corresponding to the whetstone notches 44 on the support pads 43a and 43b, and communicate with the fluid supply port 61 on the support pads 43a and 43b.
- a fluid passage 71 connected to a fluid supply means (not shown) is formed.
- a through hole 72 corresponding to the through hole 47a on the support node 43a side is formed in the support plate 42a on the left work support body 41a side.
- the four support rollers 73 On the support plate 42a on the left work support 41a side, four support rollers 73, for example, on the support pad 43a on the side facing the right work support 41b and around the support pad 43a, for example.
- the four supporting rollers 73 rotatably support a work holding carrier (work rotating support means) 74 for holding the work W.
- the work holding carrier 74 includes a thick ring portion 75 and a thin plate-shaped holding plate 76 protruding radially inward from the ring portion 75 by a predetermined dimension. It is configured.
- the inner peripheral side of the holding plate 76 is a work fitting portion 77 into which the work W can be loosely fitted, and a protrusion formed radially inward on a part of the inner peripheral side 7 8 Force Work W side Notch Wn
- the plate thickness of the holding plate 76 is formed smaller than the plate thickness of the work W.
- the work holding carrier 74 has a ring portion 75 formed so as to have a size corresponding to the step portion 46 on the support pad 43a, 43b side, and an inner diameter of the holding plate 76 is equal to the support pad 43a, 43b side. Is slightly smaller than the outer diameter of the non-contact support surface 45 of the support pad 43a. It is supported to be. As a result, the outer edge of the work W held by the work holding carrier 74 is located on the outer peripheral portion 53b of the support pads 43a and 43b.
- the center position of the work W is represented by a sign distinguishing from the center position A on the support pad 43a, 43b side.
- the work holders 41a and 41b are slidably supported in the left-right direction by a plurality of, for example, four guide rods 81 provided on the inner case 8 side in the left-right direction. That is, on the inner case 8 side, a total of four guide rods 81, one each for the front and rear and upper and lower sides, are installed between the left and right side wall plates 31c and 31d, and the work holders 41a and 41b are Four through-holes 82 corresponding to the guide rods 81 are provided on the supports 41a, 41b and at the left and right sides of the support pads 43a, 43b, and the work holders 41a, 41b are provided in the inner case.
- the through-hole 82 is slidably fitted to the guide rod 81 on the 8 side via the sliding sleeve 83, so that it is slidably supported in the left and right directions.
- the guide rod 81 is covered by a flexible cover 81a between the work holders 41a and 41b and the inner case 8.
- the work holders 41a and 41b are slid by the slide drive mechanism 9 along the guide rod 81, respectively.
- the slide drive mechanism 9 is disposed on the left and right sides of the work holders 41a and 41b corresponding to between the upper and lower guide rods 81 and 81, as shown in FIG.
- a first cylinder 84 of a pneumatic type or the like in which the cylinder body is fixed to the support plate 42b of the right work holder 41b and the drive shaft 84a is fixed to the left work holder 41a in a state facing the 41a side;
- the cylinder body is on the left of inner case 8.
- a drive shaft 85a fixed to the side wall plate 31c and arranged toward the right work holder 4lb side is composed of a pneumatic or other second cylinder 85 fixed to the left work holder 41a.
- the first cylinder 84 has its cylinder body fixed to the right side of the support plate 42b of the right work holder 41b, and the drive shaft 84a slidably penetrates a guide hole 86 formed in the support plate 42b. And is fixed to the left work holder 41a.
- the second cylinder 85 has its cylinder body fixed to the left side of the left side wall plate 31c of the inner case 8, and the drive shaft 85a slidably passes through a guide hole 87 formed in the left side wall plate 31c.
- the work holder 41a is fixed to the support plate 42a.
- the workpiece holders 41a, 41b move the support pads 43a, 43b at a substantially central position in the left-right direction in the inner case 8, so that the "grinding position" which is close to each other. (See Figure 1 and Figure 3).
- the contact portions 89a of the positioning means 89 provided at at least one position on the work holders 41a and 41b, for example, at the four corners, come into contact with the stopper 90 on the inner case 8 side. And is accurately positioned.
- the contact portion 89a is formed of a bolt or the like whose protruding amount can be adjusted.
- the first cylinder 84 side projects the drive shaft 84a from the state in which the workpiece holders 41a and 41b are in the “grinding position” ( (Left), and the second cylinder 85 side is further actuated in the direction to pull in the drive shaft 85a (left), whereby both the left and right work holders 41a and 41b move in the separating direction, and the “dressing work” is performed.
- Hour position (see Fig. 4).
- the drive shaft 85a is covered by the flexible cover 91 between the left wall plate 31c of the inner case 8 and the left work holder 41a.
- the right end of the cylinder body of the first cylinder 84 projects outside the outer case 10 through an opening 92 formed in the right side wall plate 12d of the outer case 10, and at least a part of the side surface of the projection is formed.
- Flexible cover 93 More coated.
- the left end of the cylinder body of the second cylinder 85 projects outside the outer case 10 through an opening 94 formed in the left side wall plate 12c of the outer case 10, and at least a part of the side surface of the protrusion is formed. It is covered with a flexible cover 95.
- the work drive mechanism 7 is, as shown in FIG. 3, etc., a work drive gear 79 arranged on the left work support 41a side, and is fixed to the inner case 8 side and rotationally drives the work drive gear 79. With work drive motor 97!
- the work drive gear 79 is rotatably disposed in the recessed portion 47 with the rotation shaft 79a inserted from the through hole 47a of the support pad 43a to the through hole 72 of the support plate 42a.
- a connection shaft 98 having, for example, an axial groove 98a is connected to the left end of the rotation shaft 79a of the work drive gear 79.
- the work drive motor 97 is detachably fixed to the outside of the right wall plate 31c of the inner case 8 through the opening 99 on the outer case 10 side.
- the work drive motor 97 is provided with a drive connecting portion 100 to which the rotation of the drive shaft 97a is transmitted, eccentric from the drive shaft 97a.
- the drive connecting portion 100 has a through hole in the left and right direction in which a projection (not shown) corresponding to the groove 98a on the connecting shaft 98 side is formed at the center thereof.
- the connecting shaft 98 on the side of the support 41a penetrates through the through hole 101 of the left side wall plate 31c of the inner case 8 so as to be slidable in the left-right direction.
- a flexible cover 96 that covers the connection shaft 98 is attached between the left wall plate 31c of the inner case 8 and the left work holder 41a.
- the grinding wheel device 4 includes, for example, a cup-shaped grinding wheel 3 and a drive motor (not shown) for rotating the grinding wheel 3, and one wheel device is disposed on each of the left and right sides of the work drive device 2. ing.
- Each of the gantry devices 4 has an opening 102 provided in the external case 10 on the side of the work drive device 2, a notch 103 provided in the inner case 8, and a work holder 41a.
- the work W held by the work holding carrier 74 is disposed so as to face both sides of the work W via the cutout portion 70 and the cutout portion 44 for the grindstone on the 41b side.
- the grinding wheel device 4 is configured to be able to move the grinding wheel 3 in the axial direction (left-right direction). When the work W is attached / detached, the grinding stone 3 is moved from the "grinding position" to a predetermined "grinding position". It moves to the "standby position".
- the grinding wheel 3 when grinding the work W, the grinding wheel 3 is set to the “standby position”, and the work holders 41a and 4 lb are set to the “work attachment / detachment position”.
- the work fitting portion 77 of the work holding carrier 74 by the loader (not shown) through the work holders 41a and 41b (see FIG. 5).
- the projection 78 of the work fitting portion 77 is engaged with the notch Wn of the work W, and the work W is substantially in contact with the non-contact support surface 45 of the support pad 43a ( (See Figure 11 and Figure 12).
- the work W When the work W is mounted in the work fitting portion 77 of the work holding carrier 74, the work W causes the seating detection sensor hole 58 on the support pad 43a side to be substantially closed.
- the seating of the workpiece W is detected by the seating detecting means based on the fluctuation of the load on the negative pressure source side connected to the detection sensor hole 58.
- the first cylinder 84 When the seating of the work W is detected, the first cylinder 84 is operated in a direction to retract the drive shaft 84a, the right work holder 41b moves to the left work holder 41a, and the support pads 43a, 43b Are held at the “position for attaching / detaching the workpiece” close to both sides of the workpiece W. Then, from the fluid supply means (not shown), the fluid passage 71 on the support plate 42a, 42b side, the fluid supply port 61, the fluid passage 59 on the support pad 43a, 43b side, the fluid passage 59, and the connection passage 63 are connected to each pocket 51.
- a fluid such as air or water is discharged from the fluid supply hole 62, and the workpiece W is in a non-contact state by receiving the pressure of the fluid on both sides of the workpiece W in a region outside the grinding position by the grinding gantry 3. Will be retained.
- the work holding motor 74 starts rotating through the work drive gear 79 by the drive of the work drive motor 97, whereby the work W also starts rotating, and the left and right grinding cannonballs are also rotated. 3 also starts rotating.
- the left and right grinding gantry 3 starts rotating, and gradually approaches the ground surface of the workpiece W from the “standby position”, and the workpiece W is eventually formed by the left and right grinding gantry 3.
- the grinding position is sandwiched from both sides, and grinding of the workpiece W starts.
- the heat conducted to the support pad 43a, 43b side tries to conduct along the mesh part 52, avoiding the pocket part 51 filled with fluid, so that the inner peripheral edge along the notch part for gantry 44
- the gradient of the temperature change at the connection part to the outer peripheral part 53b side at both ends of the notch 44 for gantry and at the inside and outside connection part 52a connected to the internal vein part 54 is smaller than that of the other parts.
- the temperature distribution is disturbed, and a wave shape is generated on the workpiece W side in accordance with the position where the temperature distribution is disturbed.
- the inner and outer connecting portions 52a are provided only at one location near the center position A on the inner peripheral portion 53a, the temperature distribution is Disturbances are generated only at the connection part from the inner peripheral part 53a to the outer peripheral part 53b on both ends of the notch 44 for gantry, and only one internal and external connection part 52a near the center position A. That is, when viewed in the radial direction of the work W, only the positions corresponding to the vicinity of the center position A ′ and the vicinity of the outer peripheral portion are provided (see FIG. 13).
- the concentric wavy shape of the work W which has been a problem with the conventional double-sided surface grinding device, can be effectively prevented, and the flatness of the work W surface after grinding can be further improved. It became.
- the wave shape of the work W is generated because some physical force acting to bend the work W in the out-of-plane direction is generated, and the physical force is generated by the inner peripheral edge. It is probable that this occurred at the position where the temperature distribution on section 53a was disturbed. Even in the double-sided surface grinding apparatus 1 according to the present embodiment, there is still a place where the temperature distribution is disordered on the inner peripheral portion 53a, and some physical force is applied to the work W in accordance with the position.
- the force is acting only at the positions corresponding to the vicinity of the center and the periphery of the workpiece W, but not at the intermediate part.Therefore, the distance between the points of application of the physical force However, it is presumed that the bending force acting on the work W was relaxed and the wave shape could be suppressed.
- the fluid supply holes 62 in the pockets 51a and 51b provided along the notch 44 for gantry are provided in the vicinity of the inner and outer connecting parts 52a, and the inner peripheral part 53a and the outer peripheral part 53b.
- the fluid supplied from the fluid supply holes 62 first passes through the vicinity of the inside / outside connection portion 52a, etc., and the effect near the inside / outside connection portion 52a, etc. Cooling can be performed, and concentric waveforms generated in the workpiece W after grinding can be further suppressed.
- the pocket portions 51a and 51b provided along the notch portion for gantry 44 are substantially radially aligned with the circumferential direction of the notch portion for gantry 44, that is, along the circumferential direction of the grinding gantry 3. Since it is formed to have a width, the heat conduction characteristics around the notch portion for gantry 44 can be made substantially constant along the notch portion for gantry 44, whereby the work W The concentric wave shape generated in the above can be further suppressed.
- the drive motor 37 of the thickness measuring means 32 operates, and the main body 35 moves backward along the guide rail 34 via the rack 36.
- the pair of left and right measurement arms 33, 33 enter the notch 65 for the thickness sensor of the support pads 43a, 43b, and are moved by the pair of measurement ends 33a, 33a on the tip side of the measurement arms 33, 33.
- the workpiece W is sandwiched from both sides thereof, and the thickness of the workpiece W after grinding is measured.
- the measuring arm 33 of the thickness measuring means 32 retreats from the thickness sensor cutout 65 on the support pad 43a, 43b side. . Then, the grinding gantry 3 is moved from the “grinding position” to the “standby position”, and the work holder 41b is moved from the “grinding position” to the “workpiece attaching / detaching position”. As a result, the work W after grinding is taken out of the work fitting portion 77 of the work holding carrier 74 and carried out.
- FIG. 14 exemplifies a second embodiment of the present invention.
- a portion of an inner peripheral portion 53a along the notch portion 44 for a grindstone is a connection portion with an inner vein portion 54.
- Examples of the support pads 43a and 43b configured so as not to provide any internal / external connection portions 52a are shown below.
- the support pads 43a and 43b of the present embodiment are different from the first embodiment in that, as shown in Fig. 14, one pocket portion 51 is arranged along the cutout portion 44 for gantry. Is different.
- the pressure distribution in the pocket portion 51 tends to be non-uniform as much as the region of the pocket portion 51 is widened, but the inside / outside connection portion 52a is provided at the inner peripheral portion 53a. Therefore, there is an advantage that the shape of the waveform generated on the workpiece W after grinding can be further reduced.
- the portion where the temperature distribution is disturbed in the inner peripheral portion 53a is the notch portion for gantry. Since there is only a connection portion from the inner peripheral portion 53a to the outer peripheral portion 53b side on both end sides of 44, that is, only a position corresponding to the vicinity of the outer peripheral portion of the work W, the concentric wavy shape generated on the work W is first. This can be more effectively prevented than in the case of this embodiment, and the flatness of the surface of the workpiece W after grinding can be further improved.
- the shape of the non-contact support surface 45 in the support pads 43a and 43b is at least in the vicinity of the center position of the work W, that is, in the vicinity of the center position A, in a portion along the notch 44 for the grindstone in the peripheral portion 53. It is sufficient if the inside and outside connection part 52a is not provided in the part. Other conditions can be set arbitrarily.
- the pocket portions 51 may be provided in three rows (three layers) or more in the radial direction of the notch portion 44 for gantry, or may be provided in the second row (second layer) or later from the side of the notch portion 44 for ganite.
- the shape, arrangement, and the like of the pocket portion 51 are arbitrary.
- the work rotation supporting means for rotatably supporting the work W is the work rotation support means described in the embodiment.
- the outer edge portion of the work W is directly held by three or more support rollers, and one or more of the support rollers drives the work W. You may comprise so that it may drive directly rotation.
- the shape and the driving mechanism of the work holding carrier are arbitrary.
- external teeth with which the drive gear 79 meshes may be formed on the outer peripheral side of the work holding carrier.
- the configuration of the work drive device 2 other than the support pads 43a and 43b and the configuration of the gantry device 4 can be arbitrarily changed from those of the embodiment.
- the present invention provides other double-sided surface grinding devices such as the grinding wheels 3 facing upward and downward.
- the present invention can be similarly applied to a configuration configured to cause the above.
- FIG. 1 is a plan view of a double-sided surface grinding device showing a first embodiment of the present invention.
- FIG. 2 is a front view of a double-sided surface grinding device showing a first embodiment of the present invention.
- FIG. 3 is a front cross-sectional view of a double-sided surface grinding device showing a first embodiment of the present invention.
- FIG. 4 is a front cross-sectional view of a double-sided surface grinding device showing a first embodiment of the present invention.
- FIG. 5 is an explanatory diagram of a work mounting process according to the first embodiment of the present invention.
- FIG. 6 is a right side cross-sectional view of the double-sided surface grinding device according to the first embodiment of the present invention.
- FIG. 7 is a left side cross-sectional view of the double-sided surface grinding device according to the first embodiment of the present invention.
- FIG. 8 is a side view of the support pad showing the first embodiment of the present invention.
- FIG. 9 is a plan view of a support pad showing the first embodiment of the present invention.
- FIG. 10 is a cross-sectional view of a support pad according to the first embodiment of the present invention.
- FIG. 11 is an enlarged sectional view of a main part of a double-sided surface grinding device according to a first embodiment of the present invention.
- FIG. 12 is a side view of a work holding carrier according to the first embodiment of the present invention.
- FIG. 13 is a diagram showing a temperature analysis result by a support pad according to the first embodiment of the present invention. It is.
- FIG. 14 is a side view of a support pad showing a second embodiment of the present invention.
- FIG. 15 is a side view of a non-contact support surface of a non-contact support means according to a conventional technique.
- FIG. 16 is a diagram showing a result of temperature analysis by a non-contact support means according to a conventional technique. Explanation of symbols
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04773184A EP1707313B1 (en) | 2004-01-22 | 2004-09-16 | Double-end surface grinding machine |
DE602004020385T DE602004020385D1 (de) | 2004-01-22 | 2004-09-16 | Doppelenden-flächenschleifmaschine |
US10/587,227 US7347770B2 (en) | 2004-01-22 | 2004-09-16 | Two-sided surface grinding apparatus |
KR1020067003071A KR101117431B1 (ko) | 2004-01-22 | 2004-09-16 | 양두 평면 연삭 장치 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004013908A JP3993856B2 (ja) | 2004-01-22 | 2004-01-22 | 両頭平面研削装置 |
JP2004-013908 | 2004-01-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005070620A1 true WO2005070620A1 (ja) | 2005-08-04 |
Family
ID=34805401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/013526 WO2005070620A1 (ja) | 2004-01-22 | 2004-09-16 | 両頭平面研削装置 |
Country Status (8)
Country | Link |
---|---|
US (1) | US7347770B2 (ja) |
EP (1) | EP1707313B1 (ja) |
JP (1) | JP3993856B2 (ja) |
KR (1) | KR101117431B1 (ja) |
CN (1) | CN100537136C (ja) |
AT (1) | ATE427185T1 (ja) |
DE (1) | DE602004020385D1 (ja) |
WO (1) | WO2005070620A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7887394B2 (en) | 2005-12-08 | 2011-02-15 | Shin-Etsu Handotai Co., Ltd. | Double-disc grinding machine, static pressure pad, and double-disc grinding method using the same for semiconductor wafer |
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WO2007130708A1 (en) * | 2006-01-30 | 2007-11-15 | Memc Electronic Materials, Inc. | Double side wafer grinder and methods for assessing workpiece nanotopology |
MY169550A (en) * | 2008-03-26 | 2019-04-22 | Kobe Steel Ltd | Wet grinding apparatus and grinding stone segment used therein |
JP2010064214A (ja) * | 2008-09-12 | 2010-03-25 | Koyo Mach Ind Co Ltd | 両頭平面研削盤及びワークの両面研削方法 |
JP5463570B2 (ja) * | 2008-10-31 | 2014-04-09 | Sumco Techxiv株式会社 | ウェハ用両頭研削装置および両頭研削方法 |
JP5099111B2 (ja) * | 2009-12-24 | 2012-12-12 | 信越半導体株式会社 | 両面研磨装置 |
US8712575B2 (en) * | 2010-03-26 | 2014-04-29 | Memc Electronic Materials, Inc. | Hydrostatic pad pressure modulation in a simultaneous double side wafer grinder |
JP5627114B2 (ja) * | 2011-07-08 | 2014-11-19 | 光洋機械工業株式会社 | 薄板状ワークの研削方法及び両頭平面研削盤 |
CN102267075B (zh) * | 2011-08-26 | 2012-10-03 | 湖南宇环同心数控机床有限公司 | 一种高效率高精度双端面磨削加工方法 |
JP5957277B2 (ja) * | 2012-04-28 | 2016-07-27 | 光洋機械工業株式会社 | 工作物の外周r面研削用治具および外周r面研削装置 |
JP6202959B2 (ja) * | 2013-09-17 | 2017-09-27 | 光洋機械工業株式会社 | 両頭平面研削盤用の静圧パッド及びワークの両頭平面研削方法 |
JP6309466B2 (ja) * | 2015-01-22 | 2018-04-11 | 光洋機械工業株式会社 | 両頭平面研削装置 |
JP6285375B2 (ja) * | 2015-02-17 | 2018-02-28 | 光洋機械工業株式会社 | 両頭平面研削装置 |
JP6383700B2 (ja) * | 2015-04-07 | 2018-08-29 | 光洋機械工業株式会社 | 薄板状ワークの製造方法及び両頭平面研削装置 |
CN106217177B (zh) * | 2016-08-25 | 2018-06-05 | 东莞市华邦精密模具有限公司 | 一种模具镶嵌块打磨装置 |
JP6335994B2 (ja) * | 2016-09-27 | 2018-05-30 | 旭精機工業株式会社 | 研削装置 |
CN112059854A (zh) * | 2020-09-11 | 2020-12-11 | 东台市强圣精密铸造有限公司 | 一种用于铸锻件加工检测的手持式折叠打磨机 |
CN114454006B (zh) * | 2022-04-13 | 2022-06-07 | 山东信息职业技术学院 | 一种人工智能抛磨装置 |
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- 2004-01-22 JP JP2004013908A patent/JP3993856B2/ja not_active Expired - Fee Related
- 2004-09-16 US US10/587,227 patent/US7347770B2/en active Active
- 2004-09-16 AT AT04773184T patent/ATE427185T1/de not_active IP Right Cessation
- 2004-09-16 CN CNB2004800406946A patent/CN100537136C/zh active Active
- 2004-09-16 DE DE602004020385T patent/DE602004020385D1/de active Active
- 2004-09-16 KR KR1020067003071A patent/KR101117431B1/ko active IP Right Grant
- 2004-09-16 WO PCT/JP2004/013526 patent/WO2005070620A1/ja active Application Filing
- 2004-09-16 EP EP04773184A patent/EP1707313B1/en active Active
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JPH09262747A (ja) | 1996-03-27 | 1997-10-07 | Nachi Fujikoshi Corp | 高脆性材の両面研削装置 |
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Also Published As
Publication number | Publication date |
---|---|
KR20060126897A (ko) | 2006-12-11 |
EP1707313A1 (en) | 2006-10-04 |
CN100537136C (zh) | 2009-09-09 |
KR101117431B1 (ko) | 2012-02-29 |
EP1707313B1 (en) | 2009-04-01 |
DE602004020385D1 (de) | 2009-05-14 |
EP1707313A4 (en) | 2007-01-24 |
ATE427185T1 (de) | 2009-04-15 |
US20070161334A1 (en) | 2007-07-12 |
US7347770B2 (en) | 2008-03-25 |
JP2005205528A (ja) | 2005-08-04 |
JP3993856B2 (ja) | 2007-10-17 |
CN1905990A (zh) | 2007-01-31 |
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