JP5674445B2 - Master mold manufacturing equipment - Google Patents

Description

  The present invention relates to a master mold manufacturing apparatus and, for example, to a master mold manufacturing apparatus in which a large number of convex portions are formed on a surface of a substrate.

  Conventionally, as shown in FIG. 13, there is known a master mold manufacturing apparatus 300 for manufacturing a master mold M03 (see FIGS. 3C and 6) by forming a large number of convex portions W02 on the upper surface of a substrate W01. .

  A conventional master mold manufacturing apparatus 300 includes a substrate holder 302 that holds a substrate W01, a mold holder 304 that holds a mold M01, and a dispenser 306 that supplies an uncured ultraviolet curable resin W04 to the upper surface of the substrate W01. It has.

  The mold holding unit 304 is located above the substrate holding unit 302, and the mold M01 held by the mold holding unit 304 is located above the substrate W01 held by the substrate holding unit 302. .

Substrate W01 which is held by the substrate holder 302, X-axis direction is a horizontal direction, it has become a movable positioning in the Y-axis Direction, mold M01 held by the mold holding unit 304, the vertical direction It is possible to move and position freely in the Z-axis direction. The upper surface of the substrate W01 is sufficiently larger than the lower surface of the mold M01 in which the recess M02 is formed.

  Then, by repeatedly using the mold M01 a plurality of times, a plurality of convex portions W02 made of a cured ultraviolet curable resin are provided on the upper surface of the substrate W01 at predetermined intervals in the X-axis direction and the Y-axis direction. It is designed to be provided.

  The master mold M03 provided with a plurality of convex portions W02 is used as a mold for generating a multi-lens mold M04 (see FIG. 4), for example.

  That is, as shown in FIG. 4A, after providing a seed layer M05 on the master mold M03, a multi-lens mold M04 is generated by electroforming as shown in FIG. 4B. If the multi-lens mold M04 is separated from the master mold M03 as shown in FIG. 4C, the multi-lens mold M04 can be obtained. A multi-lens molded body W05 as shown in FIG. 5 can be obtained by the multi-lens mold M04.

  For example, Patent Document 1 can be listed as a patent document related to the conventional technology.

JP 2002-120230 A

Incidentally, in the conventional master-type production apparatus 300, the defect such as air bubbles generated in the convex portion W02, failure in the master-type M03 there is a problem that may occur.

  More specifically, the substrate W01 is formed in a disk shape having a diameter of about 8 inches, for example, and the number of convex portions W02 formed on the substrate W01 is several thousand. Although the occurrence of defects in the convex portion W02 is rare, when such a large number of convex portions W02 are formed in this way, in the entire master mold M03, a defect due to the defect may occur in a very small portion of the convex portion W02. Will occur.

  If the multi-lens mold M04 is generated using the master mold M03 in which a defect is generated in a small part of the convex portions W02, a multi-lens mold M04 having a defective portion is naturally generated.

  The present invention has been made in view of the above-mentioned problems. By repeatedly using a mold a plurality of times, a master is provided by providing a plurality of convex portions made of a cured molding material on the surface of a flat substrate. An object of the present invention is to provide a master mold manufacturing apparatus capable of preventing the occurrence of defects in a master mold in a master mold manufacturing apparatus for manufacturing a mold.

The invention according to claim 1 is a master mold for manufacturing a master mold by providing a plurality of convex portions made of a cured molding material on the surface of a flat substrate by repeatedly using the mold a plurality of times. in the manufacturing apparatus, it possesses the observation camera before curing for observing the molding material before curing supplied to recess for forming the convex portion, and a mold cleaning unit for cleaning the mold, the molding material if a cured before observation camera occurrence of defects detected in a master mold manufacturing apparatus that is configured to remove by washing the molding material using the mold cleaning unit.

The invention according to claim 2 is a master mold for manufacturing a master mold by providing a plurality of convex portions made of a cured molding material on the surface of a flat substrate by repeatedly using the mold a plurality of times. in the production apparatus, it has a pre-cured observation camera to observe the molding material before curing supplied to the mold recesses for forming the convex portion, the molding materials of defect the cure before observation camera generation of If There has been detected, the supply conditions of the previous SL molding material, the precured observation camera pictures recorded, at least one of information of the place of occurrence of the defect, the memory provided in the control device, an electronic A master type manufacturing apparatus configured to store as a file .

  Invention of Claim 3 is a master type | mold manufacturing apparatus which has the post-hardening observation camera which observes the hardening molding material which comprises the said convex part in the master type | mold manufacturing apparatus of Claim 1 or Claim 2. .

  According to a fourth aspect of the present invention, in the master mold manufacturing apparatus according to any one of the first to third aspects, a curing state observation for observing a state when the molding material constituting the convex portion is cured. A master type manufacturing apparatus having a camera.

  According to the present invention, in a master mold manufacturing apparatus for manufacturing a master mold by providing a plurality of convex portions made of a hardened molding material on the surface of a flat substrate by repeatedly using a mold multiple times, There is an effect that the occurrence of defects in the master mold can be prevented.

It is a figure which shows schematic structure of a master type manufacturing apparatus main-body part. It is a figure which shows the manufacturing process of a master type | mold. It is a figure which shows the manufacturing process of a master type | mold. It is a figure which shows the manufacturing process of the metal mold | die for multilenses. It is a figure which shows the manufacturing process of a multilens molded object. FIG. 4 is a view taken in the direction of arrow VI in FIG. It is a figure which shows the motion of a dispenser. It is a figure which shows schematic structure and a motion of a type | mold washing | cleaning part. It is a block diagram which shows schematic structure of a master type manufacturing apparatus. It is a flowchart which shows operation | movement of a master type manufacturing apparatus. It is a flowchart which shows operation | movement of a master type manufacturing apparatus. It is a flowchart which shows operation | movement of a master type manufacturing apparatus. It is a figure which shows the conventional master type | mold manufacturing apparatus.

  The master mold manufacturing apparatus 1 shown in FIG. 1 and FIG. 9 uses a mold (for example, a mold) M1 a plurality of times and uses a plurality of molding materials made of a molding material cured on the surface of the flat substrate W1. By providing the convex portion W <b> 2, the master mold M <b> 2 is manufactured, and the master mold manufacturing apparatus main body 3 and the control device 5 are provided.

  For convenience of explanation here, one horizontal direction is the X-axis direction, another horizontal direction that is orthogonal to the X-axis direction is the Y-axis direction, and the vertical direction (vertical direction) ) Is the Z-axis direction.

  Moreover, the master type manufacturing apparatus 1 is installed and used in a clean room, for example. For example, only one mold M1 is installed in one master mold manufacturing apparatus 1, and only one substrate W1 is installed in one master mold manufacturing apparatus 1, for example. The substrate W1 is made of a glass substrate or the like, and each convex portion W2 is made of a material such as an ultraviolet curable resin, and is provided on one surface in the thickness direction of the glass substrate W1.

  The convex portion W2 is formed in, for example, a spherical crown shape, and the plane of the spherical crown is in surface contact with the plane of the glass substrate W1. The convex portions W2 are provided at predetermined intervals in the vertical direction and the horizontal direction.

  Master mold M2 (refer to Drawing 3 (c), Drawing 6, etc.) is provided with glass substrate W1 and a plurality of convex parts W2 provided in this glass substrate W1. The glass substrate W1 is formed in a disk shape having a diameter of about 8 inches, for example, and several thousand convex portions W2 are provided on one glass substrate W1. In order to prevent the figure from becoming complicated, the number of convex portions W2 is reduced in FIGS.

  The master mold manufacturing apparatus main body 3 includes a mold holding part (die holding part) 7 and a substrate holding part (glass substrate holding part) 9.

  The mold holding portion 7 opens the mold M1 having a recess (core) M3 for forming the protrusion W2 so that the recess M3 faces upward (the recess M3 opens upward at the upper end of the mold M1). And holding and moving the held mold M1 in the horizontal direction (X-axis direction, Y-axis direction).

  The mold M1 has only one recess M3, and the periphery of the recess M3 of the mold M1 held by the mold holding unit 7 faces upward and is an annular flat surface M4 that expands horizontally. It has become.

  The substrate holding unit 9 is provided above the mold holding unit 7 away from the mold holding unit 7. The substrate holding unit 9 is configured to hold the glass substrate W1 above the mold M1 held by the mold holding unit 7. As for the glass substrate W1 currently hold | maintained by the board | substrate holding | maintenance part 9, the surface in which the convex part W2 is formed expand | deploys in the horizontal direction, and has faced the downward direction. The substrate holding unit 9 moves and positions the held glass substrate W1 in the vertical direction with respect to the mold M1 held by the mold holding unit 7.

  Here, the glass substrate W1 held by the substrate holding unit 9 is configured to be movable and positioned in the vertical direction. Instead of or in addition to this configuration, the gold held by the mold holding unit 7 is used. The mold M1 may be configured to be movable and positionable in the vertical direction. That is, it is only necessary that the glass substrate W1 held by the substrate holding part 9 is movable and positionable in the Z-axis direction relative to the mold M1 held by the mold holding part 7.

  Similarly, the glass substrate W1 held by the substrate holding part 9 is moved and positioned in the horizontal direction (X-axis direction, Y-axis direction) relative to the mold M1 held by the mold holding part 7. It may be configured freely.

  When the glass substrate W1 held by the substrate holding portion 9 is raised and positioned at the rising end, the glass substrate W1 and the mold M1 are separated by a predetermined distance, and the periphery of the recess M3 of the mold M1. The plane M4 and the lower surface of the glass substrate W1 face each other in parallel. When the glass substrate W1 located at the rising end is lowered by a predetermined distance, the lower surface of the glass substrate W1 and the plane M4 around the recess M3 of the mold M1 are in surface contact with each other, and a plano-convex lens-like space is formed. (See FIG. 2C and the like). Further, the mold M1 (glass substrate W1) is pressed by the glass substrate W1 (mold M1).

  In plan view, the area of the glass substrate W1 held by the substrate holding unit 9 is larger than the mold M1 held by the die holding unit 7, and the glass substrate W1 held by the substrate holding unit 9 has a larger area. A mold M1 held by the mold holding unit 7 exists inside.

  The master mold manufacturing apparatus 1 (master mold manufacturing apparatus main body 3) includes a dispenser 11 for supplying an uncured ultraviolet curable resin (fluid ultraviolet curable resin) to the recess M3 of the mold M1, and a mold. A molding material curing means (for example, an ultraviolet ray generating unit) 13 for curing the ultraviolet ray curable resin supplied to the concave portion M3 of M1 is provided.

  Here, the master mold M2 will be described. In the master mold M2, as described above, a plurality of convex portions W2 made of a cured ultraviolet curable resin are provided on one surface of the flat glass substrate W1 (FIG. 3C, FIG. 6 and the like). reference).

  The master mold M2 is used when a multi-lens mold M5 as shown in FIGS. 4 and 5 is manufactured.

  In manufacturing the multi-lens mold M5, first, as shown in FIG. 4A, one surface of the master mold M2 (the surface of the convex portion W2 and the surface of the glass substrate W1 not covered with the convex portion W2). ) Is provided with a seed layer M6 made of a conductive material by vacuum deposition or the like.

  Subsequently, as shown in FIG. 4B, a multi-lens mold M5 is generated by electroforming or the like, and as shown in FIG. 4C, the master mold M2 is separated from the multi-lens mold M5. . After this separation, the seed layer M6 forms a part of the multi-lens mold M5. In the multi-lens mold M5, a plurality of concave portions M7 are formed corresponding to the convex portions W2 of the master mold M2.

  The multi-lens mold M5 manufactured in this way is a mold used when the multi-lens molded body W3 shown in FIG. 5B is molded. That is, the two multi-lens molds M5 are the upper mold M8 and the lower mold M9 shown in FIG. Although the curvature radius of the recess M7 in the upper mold M8 and the curvature radius of the recess M7 in the lower mold M9 are different from each other, they may be the same. Further, the diameter of the recess M7 in the upper mold M8 and the diameter of the recess M7 in the lower mold M9 match each other, but may be different from each other.

  Further, the respective positions of the respective concave portions M7 provided in the upper mold M8 and the respective positions of the respective concave portions M7 provided in the lower mold M9 are the left-right direction (X-axis direction) in FIG. 5 and FIG. In the direction perpendicular to the paper surface (Y-axis direction).

  Therefore, the positions of the convex portions W4 and W5 formed on the multi-lens molded body W3 molded by using the upper mold M8 and the lower mold M9 coincide with each other. That is, the multi-lens molded body W3 has a shape in which a plurality of convex portions W4 are provided on one surface in the thickness direction of the flat base W6 and a plurality of convex portions W5 are provided on the other surface. The number of the convex portions W4 and the number of the convex portions W5 coincide with each other, the respective positions of the convex portions W4 and the respective positions of the convex portions W5 coincide with each other, and the base portion W6. When viewed from the thickness direction, the center of the convex portion W4 and the center of the convex portion W5 coincide with each other.

  The multi-lens molding W3 manufactured in this manner is divided into lenses each having one convex portion W4 and one convex portion W5, and is used as a lens of a mobile phone camera or the like.

  In the multi-lens molded body W3, an annular convex portion (not shown) that surrounds the spherical crown-shaped convex portion W4 or the convex portion W5 may be provided as a lens frame.

  In the above description, the master mold M2 is used as a mold for manufacturing the multi-lens mold M5. However, the master mold M2 itself may be used as a product or a semi-finished product. For example, the master mold M2 may be divided for each portion of one convex portion W2, and the divided portion may be used as a lens or the like.

  Here, the description returns to the master mold manufacturing apparatus 1. The master mold manufacturing apparatus 1 includes a mold cleaning unit (mold cleaning unit) 15, a pre-curing observation camera 17, a post-curing observation camera 19, and a curing state observation camera 21.

The mold cleaning unit 15 is for cleaning the mold M1 . More specifically, the mold cleaning unit 15 cleans at least the recess M3 of the mold M1 and the surrounding plane M4.

  The cleaning of the mold M1 by the mold cleaning unit 15 is after the formation of the projection W2 using the mold M1 and before the formation of the next projection W2 using the mold M1. To be done. That is, after the formation of one convex portion W2 by the mold M1, the cleaning is performed before the formation of the next convex portion W2 by the mold M1. In addition, after the formation of a plurality of convex portions W2 (for example, about 2 to 10 convex portions W2) by the mold M1, the cleaning is performed before the next convex portion W2 is formed. May be.

  As will be described in detail later, the mold M1 is cleaned by spraying a cleaning liquid on the recess M3 of the mold M1. Further, the cleaning liquid sprayed on the recess M3 or the like of the mold M1 is appropriately collected.

  The pre-curing observation camera 17 is a camera for observing the pre-curing ultraviolet curable resin supplied to the concave portion M3 of the mold M1 by the dispenser 11. The ultraviolet curable resin before curing supplied to the concave portion M3 of the mold M1 is supplied to form the convex portion W2, as already understood.

Then, the master mold manufacturing apparatus 1, if the precured observation camera 17 that defects the ultraviolet curing resin before curing supplied to the concave portion M3 of the mold M1 (e.g. bubbles) occurs is detected, the control unit 5 Under the control, the mold cleaning unit 15 is used to clean and remove from the mold M1 the pre-curing ultraviolet curable resin in which a defect has occurred.

  The pre-curing observation camera 17 is configured to observe the generation of defects after supplying the uncured ultraviolet curable resin to the recess M3 of the mold M1, but in addition to the uncured ultraviolet curable resin before curing. It is also possible to use a pre-curing observation camera 17 to observe the occurrence of defects even during the supply (during the supply). Then, when the pre-curing observation camera 17 detects the occurrence of a defect during the supply of the ultraviolet curable resin, the supply of the ultraviolet curable resin by the dispenser 11 is immediately stopped, and the mold cleaning unit 15 is used to stop the ultraviolet curable resin. May be cleaned and removed from the mold M1.

  In addition, after the mold M1 is cleaned by the mold cleaning unit 15, the uncured ultraviolet curable resin is supplied (resupplied) again to the recess M3 of the cleaned mold M1.

  Further, the cleaning state by the mold cleaning unit 15 may be inspected by the pre-curing observation camera 17. If there is no problem in the cleaning state, the ultraviolet curable resin before curing may be supplied again to the recessed portion M3 of the cleaned mold M1. Further, when there is a problem in the cleaning state, the mold M1 may be cleaned again by the mold cleaning unit 15.

Furthermore, when detecting the occurrence of the ultraviolet curing resins of defects before curing observation camera 17, the supply conditions of the ultraviolet curing resin (temperature, humidity, atmospheric pressure, the feed rate of a dispenser or the like), taken with precured observation camera 17 Information on at least one of the moving images (moving images from the start of the supply of the ultraviolet curable resin until the supply of the ultraviolet curable resin is stopped) is stored in the memory provided in the control device 5 (for example, the FA personal computer 23). It is configured to store as a file.

This stored information can be taken out as appropriate. For example, it can be viewed on the screen of the FA personal computer 23 and can be transferred to an external device via a terminal (LA terminal, USB terminal, etc.) of the FA personal computer 23. The stored information will be used as data for preventing the occurrence of defects.

  Note that the supply conditions and moving images are stored when all the convex portions W2 are formed. However, the storage may be performed only for those in which a defect has occurred.

Also, when a defect occurs, the address of the convex portion W2 may be stored in the memory of the FA computer 23. For example, when the master mold M2 shown in FIG. 6 is generated, when the fourth convex portion W2a from the left and the fourth row from the left is generated, the supplied UV curable resin before curing causes defects. When the occurrence is detected, the address (3, 4) may be stored in the memory. Reference numerals E1 and E2 shown in FIG. 6 are eye marks.

  The post-curing observation camera 19 is a camera for observing the cured ultraviolet curable resin constituting the convex portion W2. When the post-curing observation camera 19 detects a defect in the convex portion W2, as in the case of the pre-curing observation camera 17, the curing conditions (temperature, humidity, atmospheric pressure, ultraviolet intensity, etc.) of the ultraviolet curing resin, the ultraviolet curing resin Is configured to store at least one piece of information of the still image when curing is completed as an electronic file in a memory provided in the control device 5.

  If there is a defect in the cured UV curable resin (convex portion W2), it is not easy to remove only one convex portion W2 where this defect has occurred, so the address of the defective convex portion W2 is FA. It is configured to store in the memory of the personal computer 23.

Incidentally, separately provided marking device such as an ink jet (not shown), this marking device may be a marking on the convex portion W2 defect occurs.

  Furthermore, when the occurrence of a defect is detected by the observation camera 19 after curing, the glass substrate W1 is once removed from the master type manufacturing apparatus 1 (substrate holding part 9), and one convex part W2 where the defect has occurred is manually or another apparatus. After the removal, the glass substrate W1 may be placed in the master mold manufacturing apparatus 1 again, and the formation of the convex portion W2 may be continued. Further, after all the convex portions W2 have been molded, the defective portion is automatically removed using another device based on the information on the defective portion recorded in the memory, and installed again in the master mold manufacturing apparatus 1. However, only the removed portion may be molded based on the information on the defective portion.

  The curing state observation camera 21 is a camera for observing a state when the ultraviolet curable resin constituting the convex portion W2 is cured.

  When a defect in the convex portion W2 is detected by the curing state observation camera 21, the curing conditions (temperature, humidity, atmospheric pressure, ultraviolet intensity, etc.) of the ultraviolet curing resin, ultraviolet curing are the same as in the case of the observation camera 17 before curing. Information of at least one of the moving images from the start of resin curing to the end of curing of the ultraviolet curable resin is stored in a memory provided in the control device 5 as an electronic file.

  When the curing state observation camera 21 detects the defect of the convex portion W2, the address of the defective convex portion is stored in the memory of the FA personal computer 23 in the same manner as when the post-curing observation camera 19 detects the defect of the convex portion W2. Processing such as storing is performed.

  The ultraviolet ray generation unit 13 is provided on the opposite side of a mold (a mold held by the mold holding unit 7) M1 with the glass substrate W1 held by the substrate holding unit 9 in between. The ultraviolet ray generator 13 can be moved and positioned in the horizontal direction in synchronization with the movement of the mold M1 held by the mold holder 7 under the control of the control device 5.

  More specifically, the glass substrate W1 held by the substrate holding unit 9 is positioned on the mold M1 held by the die holding unit 7, and the glass substrate W1 held by the substrate holding unit 9 is placed on the glass substrate W1. The ultraviolet ray generator 13 is located in the area. Further, the thickness direction of the glass substrate W1 is the vertical direction, and the lower surface of the glass substrate W1 is expanded in the horizontal direction, and each convex portion W2 is formed on the lower surface. When the mold M1 and the glass substrate W1 are viewed in the upward direction, the positions of the mold M1 and the ultraviolet ray generator 13 held by the mold holder 7 are synchronized with the mold M1 by the ultraviolet ray generator 13. And move so that they are almost identical.

  The master mold manufacturing apparatus main body 3 includes a base body 25, and the mold holding unit 7 is provided on the base body 25 above the base body 25.

  A first support column 27 is erected at one end portion (left end portion in FIG. 1) of the base body 25 in the horizontal direction, and the other end portion (right end portion in FIG. 1) of the base body 25 in the horizontal direction. ), The second support column 29 is erected. The upper end portions of the columns are integrally connected to each other by the connecting body 30.

  One end portion of the substrate holding portion 9 in the horizontal direction is engaged with the first support column 27, and the other end portion of the substrate holding portion 9 in the horizontal direction is engaged with the second support column 29. 7, the substrate holding part 9 is configured to move in the vertical direction.

  The master manufacturing apparatus main body 3 includes a first actuator (for example, a servo motor) 31 and a second actuator (for example, a servo motor) 33 for moving (driving) the substrate holding unit 9. Is provided.

  The first servomotor 31 drives the substrate holder 9 via, for example, a ball screw (not shown) on the engagement portion side (left side in FIG. 1) between the substrate holder 9 and the first support column 27. It is like that. The second servomotor 33 drives the substrate holding unit 9 via, for example, a ball screw (not shown) on the engagement unit side (right side in FIG. 1) between the substrate holding unit 9 and the second support column 29. It is like that.

  By driving the servo motors 31 and 33 synchronously, the substrate holding portion is maintained while the surface (the lower surface and the upper surface) of the glass substrate W1 held by the substrate holding portion 9 is expanded in the horizontal direction. 9 moves up and down.

  In addition, the master type manufacturing apparatus 1 is provided with an alignment camera 35. The alignment camera 35 has a position (X-axis direction, Y-axis direction) of a mold (a mold held by the mold holding unit 7) M1 with respect to a glass substrate (a glass substrate held by the substrate holding unit 9) W1. This is a camera for detecting (position).

Then, under the control of the control unit 5, in response to the detection results of the alignment cameras 35, the mold for the glass substrate W1 which is held by the substrate holder 9 (the mold is held by the mold holding unit 7) M1 It is comprised so that positioning may be carried out.

  Here, the master type manufacturing apparatus 1 will be described in more detail.

  The master type manufacturing apparatus main body 3 includes the base body 25 as described above. The upper surface of the base body 25 is a flat surface, and an XY stage 37 constituting the mold holding unit 7 is provided at the center of the flat surface. The XY stage 37 includes an XY base 39 and an XY moving body 41 provided above the XY base 39. The XY moving body 41 has a planar upper surface. The XY moving body 41 can be moved and positioned with respect to the XY base 39 in the X-axis direction and the Y-axis direction under the control of the control device 5 by an actuator such as a servo motor (not shown). The XY base 39 is provided integrally with the base body 25.

  A mold support body 43, a load cell 44, and a mold installation body 45 are provided on the upper surface of the XY moving body 41. The mold support 43 is provided integrally with the XY moving body 41. The mold installation body 45 is supported by the mold support body 43 so as to be movable in the Z-axis direction. The load cell 44 is provided between the XY moving body 41 and the mold support 43, and the mold M <b> 1 in which the glass substrate W <b> 1 held by the substrate holder 9 is lowered and held by the mold holder 7. It is possible to measure the pressing force when pressing.

  On the upper side of the mold installation body 45, the mold M1 is detachably installed (held). The mold M1 is formed in a columnar shape, for example, and a recess M3 is provided in the center of the upper surface.

In FIG. 1 , the configuration of the XY stage 37 is simply described. That is, the XY moving body 41 can be moved and positioned with respect to the XY base 39 in the X axis direction and the Y axis direction. However, in practice, the XY stage 37 includes, for example, an XY base 39, an intermediate body that can be moved and positioned only in the Y-axis direction with respect to the XY base 39, and only the X-axis direction with respect to this intermediate body. An XY moving body 41 that can be moved and positioned is provided.

  The intermediate body is driven by a Y-axis servo motor 85 shown in FIG. 9, and the XY moving body 41 is driven by an X-axis servo motor 83 shown in FIG. Further, the XY moving body 41 is moved and positioned by feedback control by the X and Y axis encoders 87 and 89 shown in FIG.

  Further, in the XY stage 37, the XY moving body 41 is moved and positioned with respect to the XY base 39 only in the X-axis direction and the Y-axis direction. On the other hand, it may be possible to rotate and position around the θ axis (axis parallel to the Z axis).

  The alignment camera 35 and the post-curing observation camera 19 are provided integrally with, for example, the XY moving body 41 via the camera support 47. The alignment camera 35 and the post-curing observation camera 19 are separated from the glass substrate W1 on the lower side of the glass substrate W1 held by the substrate holding unit 9. Then, it is moved and positioned in the X-axis direction and the Y-axis direction simultaneously with the mold M1 held by the mold holding unit 7.

  The alignment camera 35 shoots the eye mark E1 and the eye mark E2 (see FIG. 6) provided on the glass substrate W1 held by the substrate holding part 9, and thereby holds the gold held by the mold holding part 7. The position of the glass substrate (glass substrate held by the substrate holding part 9) W1 with respect to the mold M1 is detected. In addition, it is hold | maintained at the board | substrate holding | maintenance part 9 with respect to the metal mold | die M1 currently hold | maintained at the type | mold holding | maintenance part 7 by image | photographing the circular convex part W2 provided in the glass substrate W1 without using an eye mark. The position of the glass substrate W1 may be detected. In this case, the position of the convex portion W2 with respect to the edge of the glass substrate W1 may deviate from the target value, but the relative positional relationship such as the pitch between the plurality of convex portions W2 becomes accurate.

  In addition, although the post-curing observation camera 19 and the alignment camera 35 are provided in the master type manufacturing apparatus main body 3 shown in FIG. 1, even if one camera is used as both the post-curing observation camera and the alignment camera, Good.

  The substrate holding unit 9 includes a Z-axis moving body 49, a substrate support 51, and a backup glass 53.

  The Z-axis moving body 49 is formed in, for example, a rectangular flat plate shape, and holds the mold between the first support column 27 and the second support column 29 so that the thickness direction coincides with the Z-axis direction. It is provided above the mold holding part 7 away from the part 7. Further, the Z-axis moving body 49 is supported by the columns 27 and 29 via linear guide bearings 57 and is movable in the Z-axis direction.

  An actuator such as a first Z-axis servomotor 31 is provided on one side (left side in FIG. 1) of the Z-axis moving body 49 in the X-axis direction, and drives the Z-axis moving body 49. ing. An actuator such as a second Z-axis servomotor 33 is provided on the other side (the right side in FIG. 1) of the Z-axis moving body 49 in the X-axis direction so as to drive the Z-axis moving body 49. ing.

  Further, under the control of the control device 5, the first Z-axis servo motor 31 and the second Z-axis servo motor 33 are driven in synchronization, so that the upper and lower surfaces of the Z-axis moving body 49 are expanded in the horizontal direction. The position is moved and positioned in the Z-axis direction while maintaining this state.

  The substrate support 51 is formed, for example, in a cylindrical shape, and one end portion in the axial direction is installed on the lower surface of the Z-axis moving body 49 and is provided integrally with the Z-axis moving body 49. A backup glass 53 is integrally provided on the other end side (lower end side) of the substrate support 51 in the axial direction.

  The backup glass 53 is formed in, for example, a disk shape, the thickness direction is the Z-axis direction, and closes the lower end portion of the substrate support 51. Further, the glass substrate W1 can be detachably held on the flat bottom surface of the backup glass 53 by, for example, vacuum suction.

  A UV stage (stage configured similarly to the XY stage 37) 55 is provided on the lower surface of the substrate support 51 and above the backup glass 53.

  The UV stage 55 includes a UV base 63 and a UV moving body 65 provided below the UV base 63. The UV moving body 65 is feedback controlled by the control device 5 using actuators such as the servo motors 91 and 93 shown in FIG. 9 and the position detection results of the UV axis encoders 95 and 97 shown in FIG. It is possible to move and position relative to the UV base 63 in the direction and the Y-axis direction. The UV base 63 is provided integrally with the Z-axis moving body 49.

  The UV moving body 65 is provided with an ultraviolet ray generator 13 and a curing state observation camera 21. The ultraviolet ray generator 13 generates ultraviolet rays using, for example, an LED element (not shown). The ultraviolet rays emitted from the ultraviolet ray generator 13 pass through the backup glass 53 and the glass substrate W1, and cure the ultraviolet curable resin constituting the convex portion W2. The curing state observation camera 21 is provided in the vicinity of the ultraviolet ray generator 13, and photographs the ultraviolet ray curable resin through the backup glass 53 and the glass substrate W1.

  The mold cleaning unit 15, the dispenser 11, and the pre-curing observation camera 17 are supported by a base body 25, for example, and can be moved and positioned with respect to the base body 25 in the Z-axis direction and the horizontal direction.

  More specifically, the dispenser 11 and the pre-curing observation camera 17 are integrally provided on the dispenser support 67. The dispenser support 67 is supported by the base body 25 via a guide mechanism (not shown), and can be moved and positioned in the Z-axis direction and the horizontal direction by an actuator such as a servo motor (not shown) under the control of the control device 5. ing.

  Then, the dispenser 11 and the pre-curing observation camera 17 normally have a mold held by the mold holding unit 7 in order to avoid interference with the mold cleaning unit 15 and the like, as shown in FIG. Separated from mold M1. On the other hand, when the uncured ultraviolet curable resin is supplied to the recess M3 of the mold M1, as shown in FIG. 7B, the discharge port of the dispenser 11 and the pre-curing observation camera 17 are connected to the recess M3 of the mold M1. It is designed to be located almost directly above.

  The mold cleaning unit 15 is also supported by the base body 25 via a guide mechanism (not shown), and can be moved and positioned in the Z-axis direction and the horizontal direction by an actuator such as a servo motor (not shown) under the control of the control device 5. It has become. In addition, the mold cleaning unit 15 is normally separated from the mold M1 held by the mold holding unit 7 in order to avoid interference with the dispenser 11 and the like, as shown in FIG. On the other hand, when the mold cleaning unit 15 cleans the mold M1, as shown in FIG. 8B, the mold cleaning unit 15 is positioned above the mold M1, and the recess M3 of the mold M1 and the like are disposed. It is designed to be washed.

  Here, the configuration of the mold cleaning unit 15 will be described in detail.

  As shown in FIG. 8, the mold cleaning unit 15 includes a box-shaped housing 69. A mold insertion hole 77 is provided in the center of the lower wall of the housing 69, an introduction hole 71 is provided in the center of the upper wall of the housing 69, A discharge hole 73 is provided. Further, a seal member such as an O-ring 75 is provided on the lower surface of the lower wall of the housing 69 so as to surround the mold insertion hole 77.

Then, as shown in FIG. 8B, when cleaning the mold M1, the upper part of the mold M1 (the upper part having a smaller diameter than the lower part) is inserted into the mold insertion hole 77. Te, to position the upper portion of the mold M1 to the housing 69. At this time, the engagement portion between the mold M1 and the housing 69 is sealed by the O-ring 75.

  Subsequently, the cleaning agent is sprayed from the introduction hole 71 to the concave portion M3 of the mold M1, and the concave portion M3 and the like are cleaned. The cleaning agent used for cleaning is collected from the discharge hole 73.

  Next, the control device 5 and the like will be described with reference to FIG.

  The control device 5 includes an operation panel 79 and an electrical panel 81. The operation panel 79 and the electrical panel 81 are connected to each other via a signal line or the like, and the master type manufacturing apparatus main body 3 and the control device 5 are connected to each other via a signal line or the like.

  As already understood, the master-type manufacturing apparatus main body 3 includes the cameras 17, 19, 21, 35, the dispenser 11, the load cell 44, the ultraviolet ray generator 13, the mold cleaning unit 15, the Z-axis servo motor 31, 33, XY-axis servomotors 83 and 85, XY-axis encoders 87 and 89, UV-axis servomotors 91 and 93, and UV-axis encoders 95 and 97 are provided.

  In addition, the master type manufacturing apparatus main body 3 is provided with a dispenser controller 99 and a load cell conditioner 101. The dispenser 11 is connected to the operation panel 79 via the dispenser controller 99, and the load cell 44 is connected to the operation panel 79 via the load cell conditioner 101.

  The operation panel 79 is provided with a PLC (programmable controller) 103, an FA personal computer 23, an image processing controller 105, a Z-axis driver 107, a touch panel 109, and operation buttons 111. Each camera 17, 19, 21, 35 is connected to the PLC 103 via the image processing controller 105, and the Z-axis servomotors 31, 33 are connected to the PLC 103 via the Z-axis driver 107.

  Note that the camera 113 directly connected to the FA personal computer 23 is a camera for photographing the entire master type manufacturing apparatus 1.

  The electrical board 81 is provided with a PLC 115, an X / Y-axis driver 117, and a U / V-axis driver 119. The X and Y axis servo motors 83 and 85 are connected to the PLC 115 via the X and Y axis drivers 117, and the U and V axis servo motors 91 and 93 are connected to the PLC 115 via the U and V axis drivers 119. Has been.

  Next, the operation of the master mold manufacturing apparatus 1 will be described.

  In the master mold manufacturing apparatus 1, the mold M1 is moved and positioned under the control of the control apparatus 5 when the mold M1 and the glass substrate W1 are separated from each other (see FIG. 2A).

  Subsequently, an ultraviolet curable resin is supplied to the recess M3 of the mold M1 (see FIG. 2B).

  Subsequently, the mold M1 and the glass substrate W1 are brought into contact with each other, the glass substrate W1 is pressed with the mold M1, and the inside of the recess M3 of the mold M1 (the recess M3 of the mold M1 and the glass substrate W1 are formed). The ultraviolet curable resin existing in the closed space) is irradiated with ultraviolet rays emitted from the ultraviolet ray generator 13 to cure the ultraviolet curable resin (see FIG. 2C).

Subsequently, when the glass substrate W1 is separated (separated) from the mold M1, one convex portion W2 is formed on the glass substrate W1 ( see FIG. 3A ).

  Then, each operation | movement from the movement positioning of the metal mold | die M1 to the said hardening and separation was repeated several times (refer FIG.3 (b)), and it comprised with the ultraviolet curable resin hardened on the surface of the flat glass substrate W1. A plurality of convex portions W2 are provided to manufacture a master mold M2 (see FIG. 3C).

  The operation of the master type manufacturing apparatus 1 will be described in more detail with reference to FIGS.

  First, as an initial state, the Z-axis moving body 49 is raised, the mold M1 is installed and held in the mold holding unit 7, and the glass substrate W1 is installed and held in the glass substrate holding unit 9. The dispenser 11 is retracted to the position shown in FIG. 7A, the mold cleaning unit 15 is retracted to the position shown in FIG. 8A, and the XY moving body 41 and the UV moving body 65 are initially set. The mold M1 is cleaned, the ultraviolet ray generator 13 does not emit ultraviolet rays, and “0” is stored in a predetermined area N of the memory of the FA personal computer 23. (S1, see FIG. 2 (a)).

  In the initial state, under the control of the control device 5, the dispenser 11 and the pre-curing observation camera 17 are moved to the dropping position shown in FIG. 7B (S3), and the uncured ultraviolet curable resin is used as the mold M1. Are dropped and supplied to the concave portion M3 (S5, see FIG. 2B).

  Subsequently, the pre-curing observation camera 17 is observed for occurrence of bubbles or the like in the ultraviolet curable resin (S7), and when a defect such as bubbles is detected, the dispenser 11 and the pre-curing observation camera 17 are Move to the retreat position shown in FIG. 7A (S9), move the mold cleaning unit 15 to the cleaning position shown in FIG. 8B (S11), clean the mold M1 (S13), The cleaning unit 15 is moved to the retracted position shown in FIG. 8A (S15), and the process returns to step S3.

  On the other hand, when defects such as bubbles are not detected by the pre-curing observation camera 17 (S7), the dispenser 11 and the pre-curing observation camera 17 are moved to the retracted position shown in FIG. 7A (S17), and XY The moving body 41 and the UV moving body 65 are moved and positioned (S19).

  Subsequently, the Z-axis moving body 49 is moved (lowered) at a high speed by a predetermined distance (S21), and the Z-axis moving body 49 is moved (lowered) at a low speed (S23).

It is determined whether or not the detected load of the load cell 44 has reached a predetermined value while the Z-axis moving body 49 is moving at a low speed (S25). When the detected load of the load cell 44 does not reach the predetermined value, the process returns to step S23, and when the detected load of the load cell 44 reaches the predetermined value, the Z-axis moving body 49 is stopped (S27) The generation unit 13 emits ultraviolet rays for a predetermined time to cure the ultraviolet curable resin (S29, FIG. 2 (c)).

The curing situation is photographed by the curing situation observation camera 21 (S31), and when the occurrence of a defect such as a bubble is detected during curing, the address of the convex portion W2 where the defect has occurred is determined on the FA personal computer 23. Store in the memory (S33) .

  On the other hand, when the curing state is good, the Z-axis moving body 49 is raised (S35, FIG. 3A). Thereby, one convex part W2 is formed in the lower surface of the glass substrate W1.

  Subsequently, the post-curing observation camera 19 (XY moving body 41) is moved and positioned in order to photograph the formed convex portion W2 (S37).

  Subsequently, the post-curing observation camera 19 observes whether or not there is a defect such as a bubble in the convex portion W2 (S39). If the occurrence of a defect such as a bubble is detected as a result of the observation, the address of the convex portion W2 where the defect has occurred is stored in the memory of the FA personal computer 23 (S41).

  If the occurrence of defects such as bubbles is not detected as a result of the observation (S39), the mold cleaning unit 15 is moved to the cleaning position shown in FIG. 8B (S43), and the mold M1 is cleaned (S45). ), The mold cleaning unit 15 is moved to the retracted position shown in FIG. 8A (S47).

  Subsequently, “1” is added to the value stored in the predetermined area N of the memory of the FA personal computer 23 (S49).

  If the value of the predetermined region N reaches a predetermined number (the number of convex portions W2 to be formed on the glass substrate W1), the operation is terminated, and if not, the process returns to step S3.

  According to the master mold manufacturing apparatus 1, the glass substrate W1 is installed so that the surface with the large area on which the convex portion W2 is formed faces downward, and the mold M1 is installed so that the concave portion M3 with the small area faces upward. In addition, since the convex portion W2 is provided on the glass substrate W1, dust (dust) does not adhere to the lower surface of the glass substrate W1 having a large area, and the concave portion M3 of the mold M1 having a small area does not adhere. The chance of dust falling down will decrease. And it can prevent mixing of the fine dust etc. to the master type | mold M2 at the time of manufacturing the master type | mold M2, and can suppress generation | occurrence | production of a defect.

  Further, according to the master mold manufacturing apparatus 1, since the mold M1 can be cleaned by the mold cleaning unit 15, it is possible to prevent dust and the like from being mixed into the convex part W2, and the occurrence of defects in the convex part W2. Can be prevented in advance.

  In addition, since only one recess M3 is provided in the mold M1, there is no individual difference between the projections W2 formed on the glass substrate W1, the manufacturing cost of the mold M1 can be reduced, and the mold cleaning unit The structure of 15 can be simplified and the metal mold | die M1 can be wash | cleaned exactly.

  Further, according to the master mold manufacturing apparatus 1, since the pre-curing observation camera 17 for observing the uncured ultraviolet curable resin supplied to the recess M3 of the mold M1 is provided, there is a problem with the uncured ultraviolet curable resin. The occurrence of defects can be detected, the occurrence of defects on the protrusions W2 of the master mold M2 can be prevented, and the occurrence of defects on the protrusions W2 of the master mold M2 can be eliminated.

Further, according to the master mold manufacturing apparatus 1, when the observation camera 17 before curing the generation of the ultraviolet curing resins defects detected, to remove the ultraviolet curing resin from the washed mold M1 by using a mold wash 15 Therefore, it is possible to prevent generation of defective and hardened convex portions W2. Further, even if a defect occurs in the ultraviolet curable resin before curing, the operator does not need to stop the master mold manufacturing apparatus 1 to perform the removal work of the ultraviolet curable resin before curing, and the master mold manufacturing apparatus 1 Can continue to operate.

  Moreover, according to the master type manufacturing apparatus 1, since the post-curing observation camera 19 is provided, it is possible to detect the occurrence of a defect in the cured ultraviolet curable resin, and the defective convex portion W2 in the master mold M2. Can be grasped.

  Moreover, according to the master type manufacturing apparatus 1, since the curing state observation camera 21 is provided, the occurrence of a defect in the cured ultraviolet curable resin can be detected at the stage where the ultraviolet curable resin is cured. It is possible to accurately grasp occurrence conditions and the like.

  The curing time observation camera 21 may measure the curing time of the ultraviolet curable resin, and control may be performed so that the generation time of the ultraviolet rays in step S29 is minimized according to the measurement result.

  Further, according to the master mold manufacturing apparatus 1, the glass substrate W1 held by the substrate holding unit 9 moves in the vertical direction, and the mold holding unit 7 holding the mold M1 smaller than the glass substrate W1 moves in the horizontal direction. Since it is comprised so that an enlargement of an apparatus may be suppressed.

  That is, since the size of the XY moving body 41 (dimensions in the X axis and Y axis directions) can be reduced, the size of the XY base 39 (dimensions in the X axis and Y axis directions) and the size of the base body 25 can be reduced. The size (dimensions in the X-axis and Y-axis directions) can also be reduced, and the size of the device (dimensions in the X-axis and Y-axis directions) can be made smaller than that of the device 300 shown in FIG.

Further, according to the master mold manufacturing apparatus 1, since the mass of the mold holding unit 7 and the XY moving body 41 is small, the movement positioning of the mold M1 held by the mold holding unit 7 (for example, the repeat accuracy is about 0.1 μm). Thus, positioning with an absolute positioning accuracy of about 0.2 μm can be made quickly and accurately. Then, it is possible to make the pitch of the convex portion W2 in the master mold M2 are accurate. Thereby, an error between the pitch of the recesses M7 in the upper mold M8 and the pitch of the recesses M7 in the lower mold M9 shown in FIG. 5 can be almost eliminated, and an accurate-shaped multi-lens molding W3 can be obtained. Further, when the multi-lens molding W3 is divided into the convex portions W4 and W5, the positional deviation between the center of one convex portion W4 and the center of the other convex portion W5 in the divided convex lens (biconvex lens). Can be eliminated.

  Further, according to the master mold manufacturing apparatus 1, the ultraviolet ray generator 13 moves in synchronization with the mold M1 held by the die holder 7 and irradiates the convex part W2 of the glass substrate W1 with ultraviolet rays. The projection W2 can be efficiently cured by irradiating the projection W2 efficiently.

In addition, according to the master type manufacturing apparatus 1, the substrate holding unit 9 is driven in the vertical direction by the pair of servo motors 31 and 33 provided on both ends of the base body 25, so that the substrate holding unit 9 is at both ends. The substrate holding portion 9 can be moved accurately with a good balance.

Further, according to the master mold manufacturing apparatus 1 according to the detection results of the alignment cameras 35, the glass substrate W1 which is held by the substrate holder 9, the positioning of the molds M1 stored in the type storing portion 7 Therefore, the position of the mold M1 relative to the substrate W1 can be made accurate, and the pitch error of each convex portion W2 provided on the glass substrate W1 can be almost eliminated.

  In the above description, one recess M3 is formed in one mold M1, but two or more recesses M3 may be formed in one mold M1.

DESCRIPTION OF SYMBOLS 1 Master type | mold manufacturing apparatus 7 Type holding | maintenance part 9 Substrate holding | maintenance part 13 Ultraviolet light generation part 15 Type | mold washing | cleaning part 17 Pre-hardening observation camera 19 Post-hardening observation camera 21 Curing condition observation camera 25 Base body 27 First support | pillar 29 2nd support | pillar 31 First actuator (servo motor)
33 Second actuator (servo motor)
35 Alignment camera M1 type (mold)
M2 Master type M3 Recess W1 Substrate (glass substrate)
W2 Convex

Claims (4)

In a master mold manufacturing apparatus for manufacturing a master mold by providing a plurality of convex portions made of a cured molding material on the surface of a flat substrate by repeatedly using a mold multiple times,
A pre-curing observation camera for observing the molding material before curing supplied to the concave portions of the mold for forming the convex portions ;
Have a, and the mold cleaning unit for cleaning the mold,
When detecting the occurrence of defects of the molding material is the cure before observation camera, master mold manufacturing apparatus which is characterized that you have been configured to remove by washing the molding material using the mold cleaning unit. In a master mold manufacturing apparatus for manufacturing a master mold by providing a plurality of convex portions made of a cured molding material on the surface of a flat substrate by repeatedly using a mold multiple times ,
Having a pre-curing observation camera for observing the molding material before curing supplied to the concave portion of the mold for forming the convex portion;
When detecting the occurrence of defects of the molding materials is the precured observation camera, supply conditions of the previous SL molding material, the precured observation camera pictures recorded, at least one of the place of occurrence of the defect A master-type manufacturing apparatus configured to store information as an electronic file in a memory provided in a control device. In the master mold manufacturing apparatus according to claim 1 or 2,
A master mold manufacturing apparatus having a post-curing observation camera for observing a cured molding material constituting the convex portion. In the master type manufacturing apparatus according to any one of claims 1 to 3,
A master mold manufacturing apparatus comprising a curing state observation camera for observing a state when the molding material constituting the convex portion is cured.

Images