WO2005084910A1 - ディスク成形用金型、調整部材及びディスク基板の成形方法 - Google Patents
ディスク成形用金型、調整部材及びディスク基板の成形方法 Download PDFInfo
- Publication number
- WO2005084910A1 WO2005084910A1 PCT/JP2005/003858 JP2005003858W WO2005084910A1 WO 2005084910 A1 WO2005084910 A1 WO 2005084910A1 JP 2005003858 W JP2005003858 W JP 2005003858W WO 2005084910 A1 WO2005084910 A1 WO 2005084910A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- disk
- mirror surface
- stamper
- peripheral edge
- adjusting member
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14639—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles for obtaining an insulating effect, e.g. for electrical components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/263—Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs
- B29C45/2632—Stampers; Mountings thereof
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
- G11B7/263—Preparing and using a stamper, e.g. pressing or injection molding substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/263—Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs
- B29C2045/2667—Particular inner or outer peripheral portions of the substrate
Definitions
- the present invention relates to a disk molding die, an adjusting member, and a method of molding a disk substrate.
- the injection molding machine includes the mold device, a mold clamping device, and an injection device.
- the mold clamping device includes a fixed platen and a movable platen, and the movable platen is moved forward and backward by a mold clamping motor. The mold is closed, closed and opened.
- the injection device includes the heating cylinder and an injection nozzle for injecting molten resin, and a screw is disposed in the heating cylinder so as to be rotatable and advance and retreat.
- the metering motor is driven to rotate the screw, the resin supplied from the hopper into the heating cylinder is heated and melted, and is stored in front of the screw head. Let me do.
- the injection motor is driven to advance the screw, the resin accumulated in front of the screw head is injected by the injection nozzle force, and is filled in the cavity space.
- a stamper is attached to a fixed-side mold assembly constituting the mold apparatus, and a fine pattern of the stamper is added to the resin filled in the cavity space. Is transferred (for example, see Patent Document 1).
- Patent Document 1 JP-A-10-166396
- the resin is formed in the center of the cavity space. After being supplied to the formed gate, the cavity space flows radially outward.At this time, since the outer peripheral edge of the mold device is in contact with the outside air, the temperature of the resin is reduced. In the vicinity of the outer periphery of the cavity space, the resin becomes lower than other portions, the resin near the outer periphery solidifies in a high-density state, and the resin in the other portions solidifies in a low-density state. Pine.
- the present invention solves the problems of the conventional mold device and increases the flatness of the disk substrate.
- a first mirror surface disk, a stamper attached to the first mirror surface disk, and a first mirror surface disk are provided so as to face the first mirror surface disk.
- a second mirror surface forming a cavity space between the first mirror surface disk and the first mirror surface disk at the time of mold clamping, and a surface that slides with the stamper, and is provided near an outer peripheral edge of the first mirror surface disk.
- an adjusting member formed so as to protrude toward the cavity space side in a radially outward direction.
- the surface is a tapered surface.
- the surface is formed by being curved.
- the adjusting member may be arranged such that an inner peripheral edge is located 0.2-2 [mm] radially inward from an outer peripheral edge of the disk substrate. It is arranged in.
- the thickness of the outer peripheral edge of the adjustment member is set to be larger than the thickness of the inner peripheral edge by 10 to 50 m].
- the adjusting member may further include: It is formed of a material having lower thermal conductivity than the first mirror disk.
- the first mirror surface plate, the stamper attached to the first mirror surface disk, and the first mirror surface disk are disposed so as to face the first mirror surface disk. It is arranged on a disk molding die provided with a second mirror surface disk forming a cavity space between the disk and the mirror surface disk.
- the first mirror plate has a surface that slides with the stamper, and is formed near the outer peripheral edge of the first mirror surface disk so as to protrude radially outward toward the cavity space side.
- the surface is a tapered surface.
- the surface is further formed to be curved.
- the inner peripheral edge is further disposed so as to be located radially inward of the outer peripheral edge of the disk substrate in a direction of 0.2-2 [mm].
- the thickness of the outer peripheral edge is further increased by 10 to 50 m] than the thickness of the inner peripheral edge.
- the adjusting member is formed of a material having a lower thermal conductivity than the first mirror surface plate.
- the fine pattern of the stamper provided in one of the movable-side mold assembly and the fixed-side mold assembly is transferred. Started to mold disk substrates!
- the movable mold assembly is moved toward the fixed mold assembly, and the movable mold assembly is moved.
- a cavity space for filling a molding material is formed between the mold assembly and the fixed-side mold assembly, and as the cavity space is filled with the molding material, the stamper
- the stamper When the stamper is expanded in contact with the mold assembly of the above, the stamper is slid by an adjusting member for adjusting the variation of the thickness in the outer peripheral direction of the disk substrate, and the molding material in the above cavity space is formed.
- the stamper shrinks in contact with the one mold assembly as the molding material cools, the stamper is slid by the adjusting member to move the movable side.
- the mold assembly on the fixed side is moved away from the fixed mold assembly.
- the first mirror surface disk, the stamper attached to the first mirror surface disk, and the first mirror surface disk are provided so as to face the first mirror surface disk.
- a second mirror surface forming a cavity space between the first mirror surface disk at the time of mold clamping, and a surface sliding with the stamper, near an outer peripheral edge of the first mirror surface disk; And an adjusting member formed so as to protrude radially outward toward the cavity space.
- an adjusting member is formed near the outer peripheral edge of the first mirror surface plate, and the adjusting member has a surface that slides on the stamper. Therefore, when the entire disk substrate is cooled, Even if the amount of shrinkage decreases in the vicinity of the outer periphery of the cavity space due to the higher density, and in other parts, increases in the lower portion due to the lower density, the thickness of the disk substrate increases even in the outer periphery of the cavity space. Can be prevented from increasing in the vicinity of. Therefore, the flatness of the disk substrate can be increased, and the quality can be improved.
- the back surface of the stamper is not repeatedly rubbed by the step. Therefore, it is possible to suppress local wear near the outer peripheral edge of the back surface of the stamper, and it is possible to prevent local unevenness in the temperature of the stamper. As a result, it is possible to prevent the occurrence of local uneven birefringence and the collapse of the shape of the land group, and to improve the quality of the disk substrate.
- FIG. 1 is a cross-sectional view showing a main part of a mold apparatus according to a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view of the mold device according to the first embodiment of the present invention.
- FIG. 3 is a sectional view showing a main part of a mold apparatus according to a second embodiment of the present invention. Explanation of symbols
- FIG. 1 is a cross-sectional view showing a main part of a mold device according to the first embodiment of the present invention
- FIG. 2 is a cross-sectional view of the mold device according to the first embodiment of the present invention.
- reference numeral 10 denotes a mold apparatus
- 11 denotes a fixed platen
- 12 denotes a fixed-side mold as a fixed mold attached to the fixed platen 11 and as a first mold assembly.
- the mold assembly 32 is a movable mold attached to a movable platen (not shown), and
- the mold clamping mechanism includes, for example, a mold clamping motor as a driving unit for mold clamping, a toggle mechanism, and the like.
- the movable platen is advanced and retracted by driving the motor for driving and the toggle mechanism is operated, and the mold assembly 32 is advanced and retracted (moves in the left and right direction in FIG. 2), and is brought into and out of contact with the mold assembly 12.
- mold closing, mold closing and mold opening of the mold apparatus 10 can be performed.
- a cavity space (not shown) is formed between the mold assembly 12 and the mold assembly 32.
- the fixed platen 11, the movable platen, the mold clamping mechanism and the like constitute a mold clamping device.
- the mold assembly 12 includes a base plate 15 as a first support member, a mirror plate 16 as a first mirror plate attached to the base plate 15, and a radially outward portion of the mirror plate 16.
- a ring-shaped guide ring 18 as a first outer ring attached to the base plate 15 and a sprue bush that extends through the base plate 15 and the mirror panel 16 in the axial direction.
- a molding material injected from an injection nozzle 23 attached to a front end (left end in FIG. 2) of a heating cylinder 22 as a cylinder member is provided. ⁇ ⁇
- the sprue 26 through which the fat passes is formed.
- the sprue bush 24 is provided with a front end facing the cavity space, and a die 28 having a concave force is formed at the front end.
- a disc-shaped stamper 29 as a nest having a hole formed in the center and a fine pattern formed on the surface is attached to the front end face (the left end face in FIG. 2) of the mirror board 16.
- the stamper 29 is formed with minute irregularities on the front end face, and the outer peripheral edge is pressed against the mirror surface board 16 by the outer holder 31 and the inner peripheral edge force S inner holder 60 and held.
- the mold assembly 12 is also provided with a fixed-side air probe (not shown).
- a stamper can be disposed on the mold assembly 32.
- the mold assembly 32 includes a base plate 35 as a second support member, a mirror plate 36 as a second mirror plate attached to the base plate 35, and a radial direction larger than the mirror plate 36.
- An annular guide ring 38 serving as a second outer peripheral ring disposed outside, the base plate 35 and the mirror board 36 are axially extended through the guide ring 38 and opposed to the sprue bush 24.
- a cut punch 48 is provided so as to be able to advance and retreat, and the front end (the right end in FIG. 2) of the cut punch 48 has a shape corresponding to the die 28.
- An outer peripheral edge of a surface of the mirror board 36 facing the mirror board 16 is projected toward the mirror board 16 by an amount corresponding to the thickness of the disk substrate to be formed, and an annular ring (not shown) is formed. Capilling is provided.
- a drive cylinder (not shown) as a drive unit for boring (not shown) is provided behind the cut punch 48 (to the left in FIG. 2).
- the drive cylinder is driven by driving the drive cylinder.
- the cut punch 48 can be moved forward (moved to the right in Fig. 2)!
- the die assembly 32 is also provided with a not-shown agitator bush, an ejector pin, a movable air probe, and the like.
- the mold clamping motor when the mold clamping motor is driven to advance the movable platen and the mold assembly 32 is advanced, the mold is closed and the guide ring 18 is closed. , 38 are connected by means of soldering, and the above-mentioned capillary and mirror board 36 are aligned with mirror board 16 and stamper 29. Then, the mold clamping motor is further driven to perform mold clamping. When the melted resin is injected from the injection nozzle 23 in the mold clamping state, the resin is filled into the cavity through the sprue 26 and subsequently cooled to become a prototype substrate. .
- annular recesses 18a, 38a are formed on the inner peripheral side of the guide ring 18 and the outer peripheral side of the guide ring 38, respectively, in order to irradiate the guide rings 18, 38, and are formed radially outward from the concave portion 18a.
- the first tapered surface 18b has a second tapered surface 38b formed radially inward of the concave portion 38a.
- a temperature control flow path (not shown) is formed in the mirror disks 16 and 36.
- the cut punch 48 is advanced by driving the drive cylinder, the front end of the cut punch 48 enters the die 28, and a hole is formed in the prototype substrate in the cavity space. Then, the prototype substrate on which the perforation process has been performed is further cooled, whereby the disk substrate is formed.
- the mold clamping motor is driven, the movable platen is moved backward, the mold assembly 32 is moved backward (moves leftward in FIG. 2), the mold is opened, and the ejector pin is moved forward. Then, the disk substrate is protruded and released from the mold assembly 32. Thus, the disk substrate can be taken out.
- the resin when the resin is injected from the injection nozzle 23, it flows in the sprue 26, is supplied to a gate formed in the center of the cavity space, and then flows radially outward in the cavity space. .
- the temperature of the resin since the outer peripheral edge of the mold device 10 is in contact with the outside air, the temperature of the resin is lower near the outer peripheral edge of the cavity space than at other portions, and the temperature of the resin near the outer peripheral edge of the cavity space is lower.
- the fat solidifies in a high density state, and the other parts of the resin solidify in a low density state.
- At least one of the mirror disks 16 and 36 in the present embodiment, the vicinity of the outer peripheral edge of the front end surface of the mirror disk 16 that abuts against the stamper 29 is referred to as the front (left in FIG. 2). That is, it is made to protrude toward the mold assembly 32 side.
- an annular groove 51 is formed near the outer peripheral edge of the front end face of the mirror surface disk 16 that contacts the stamper 29, and the annular groove 51 is formed in the outer peripheral direction of the disk substrate.
- a thickness adjusting member 52 is attached as an annular adjusting member for adjusting the variation in the thickness of all the members.
- a front end face si of the thickness adjusting member 52 is formed so as to protrude from the inner peripheral edge pi to the center portion p2 toward the cavity space side, that is, toward the front, and slide against the contraction of the stamper 29. (Hereinafter referred to as “sliding surface”).
- the sliding surface has a flat portion sa extending radially outward from the inner peripheral edge pi over a predetermined distance and parallel to the front end surface of the mirror surface board 16, and a predetermined distance from the outer peripheral edge of the flat portion sa.
- An inclined portion sb extending radially outward and inclined to a central portion p2, and a radially outward and a mirror surface over a predetermined distance from an outer peripheral edge of the inclined portion sb.
- Panel 1 6 Stamper 2 parallel to the front end face
- the groove 51 is formed so that no step is formed between the thickness adjusting member 52 and the mirror surface board 16 at the inner peripheral edge p 1 of the thickness adjusting member 52.
- the depth of the inner peripheral edge and the thickness of the inner peripheral edge pi of the thickness adjusting member 52 are made equal.
- the front end face si can be formed to have a tapered surface with the same inclination toward the radially inward force outward, but the front end face si is curved so that the inclination of the portion of the inner peripheral edge pi can be reduced.
- the thickness adjusting member 52 is disposed so that the inner peripheral edge pi is located radially inward of about 0.2-2 [mm] from the outer peripheral edge of the disk substrate, and the central portion p2 From the inner peripheral edge pi to the outer peripheral edge p3 of the thickness adjusting member 52 is increased by about 10 to 50 m].
- the tapered surface for facilitating sliding by extending the stamper in the outer peripheral direction when the cavity space is filled with resin is provided near the outer peripheral edge of the mirror surface disk 16. Since the thickness adjusting member 52 is provided, the thickness in the vicinity of the outer peripheral edge of the cavity space is reduced by about 10 to 50 m compared to other portions. Therefore, when the mold is opened and the entire disc substrate is cooled, the amount of shrinkage in the vicinity of the outer peripheral edge of the cavity space is low in other portions where the density is low by the high density. Even if it is increased, the thickness of the disk substrate can be prevented from increasing near the outer peripheral edge of the cavity space. As a result, the flatness of the disk substrate can be increased, and the quality can be improved.
- the cavity space is intermittently filled with resin, and subsequently cooled, so that the stamper 29 is repeatedly heated and cooled, and is repeatedly expanded and contracted.
- the stamper 29 is repeatedly heated and cooled, and is repeatedly expanded and contracted.
- the back surface of the stamper 29 is not repeatedly rubbed by the step, and the vicinity of the outer peripheral edge of the back surface of the stamper 29 can be suppressed from being locally worn.
- the formation of unevenness can be prevented. As a result, it is possible to prevent the occurrence of local uneven birefringence and the collapse of the shape of the land group in the disk substrate, thereby improving the quality of the disk substrate.
- the thickness adjusting member 52 is formed of the same material as that of the mirror plate 16. However, the thickness adjusting member 52 is formed of a material having lower thermal conductivity than the mirror plate 16, heat insulation. Have sex And the like. In this case, the temperature of the resin near the outer periphery of the cavity space
- the mold when the mold is opened thereafter and the entire disc substrate is cooled, the amount of shrinkage near the outer peripheral edge of the cavity space is prevented from becoming smaller than that of other portions. Since the disk substrate can be stopped, the flatness of the disk substrate can be increased, and the quality can be improved.
- FIG. 3 is a cross-sectional view showing a main part of a mold apparatus according to the second embodiment of the present invention.
- the sliding surface formed on the front end face si extends radially outward over a predetermined distance from the inner peripheral edge pi, and is inclined so as to have the inclined portion sd, and the inclined portion sd.
- a flat portion se extending radially outward from the outer peripheral edge of sd for a predetermined distance to the outer peripheral edge of the stamper 29 in parallel with the front end face of the mirror surface board 16.
- the inclined portion sd can be easily processed, and the cost of the thickness adjusting member 52 can be reduced.
- the mold assembly 32 is moved toward the mold assembly 12, and the mold assembly 32 and the mold assembly 32 are moved together.
- the stamper 29 expands in a state of being in contact with the mold assembly 12, the thickness increases.
- the stamper 29 is slid by the adjustment member 52.
- the resin in the cavity space Is cooled to form a disk substrate. At this time, as the resin cools, the stamper 29 contracts in a state of contact with the mold assembly 12, but the stamper 29 is slid by the thickness adjusting member 52.
- the mold assembly 32 is moved away from the mold assembly 12.
- the stamper 29 expands or contracts due to the heat transfer of the disk substrate force.
- the present invention is applied to the case where the resin is filled with resin.
- the present invention can also be applied to a case where the stamper 29 expands or contracts due to the pressure in the cavity space, the pressure in the cavity space generated by the mold clamping force when compressing the resin in the cavity space, or the like.
- the present invention is not limited to the above-described embodiment, but can be variously modified based on the gist of the present invention, and the scope of the present invention is not excluded.
- the present invention can be applied to a disk molding die for molding a disk substrate.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05720130A EP1724084A1 (en) | 2004-03-08 | 2005-03-07 | Disc molding die, adjusting member and disc board molding method |
US10/591,132 US20070176311A1 (en) | 2004-03-08 | 2005-03-07 | Mold for molding disk, adjustment member, and method of molding disk substrate |
JP2006510764A JPWO2005084910A1 (ja) | 2004-03-08 | 2005-03-07 | ディスク成形用金型、調整部材及びディスク基板の成形方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-064282 | 2004-03-08 | ||
JP2004064282 | 2004-03-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005084910A1 true WO2005084910A1 (ja) | 2005-09-15 |
Family
ID=34918184
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/003858 WO2005084910A1 (ja) | 2004-03-08 | 2005-03-07 | ディスク成形用金型、調整部材及びディスク基板の成形方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20070176311A1 (ja) |
EP (1) | EP1724084A1 (ja) |
JP (1) | JPWO2005084910A1 (ja) |
KR (1) | KR100763475B1 (ja) |
CN (1) | CN1929980A (ja) |
TW (1) | TWI250930B (ja) |
WO (1) | WO2005084910A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010052229A (ja) * | 2008-08-27 | 2010-03-11 | Seikoh Giken Co Ltd | ディスク成形用金型、鏡面盤、ディスク基板及びその成形方法 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7943080B2 (en) * | 2005-12-23 | 2011-05-17 | Asml Netherlands B.V. | Alignment for imprint lithography |
CN102446522A (zh) * | 2010-10-13 | 2012-05-09 | 吉林庆达数码有限公司 | 一种光盘生产中调整白片厚度的方法 |
CN106217777A (zh) * | 2016-08-23 | 2016-12-14 | 全椒东润电子科技有限公司 | 一种用于生产转盘的模具 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000015644A (ja) * | 1998-07-07 | 2000-01-18 | Mitsubishi Chemicals Corp | ディスク基板成形用金型 |
JP2003011180A (ja) * | 2001-07-05 | 2003-01-15 | Tdk Corp | 金型装置、ディスク基板 |
-
2005
- 2005-03-07 CN CNA2005800073340A patent/CN1929980A/zh active Pending
- 2005-03-07 KR KR1020067017098A patent/KR100763475B1/ko not_active IP Right Cessation
- 2005-03-07 WO PCT/JP2005/003858 patent/WO2005084910A1/ja not_active Application Discontinuation
- 2005-03-07 EP EP05720130A patent/EP1724084A1/en not_active Withdrawn
- 2005-03-07 US US10/591,132 patent/US20070176311A1/en not_active Abandoned
- 2005-03-07 JP JP2006510764A patent/JPWO2005084910A1/ja not_active Withdrawn
- 2005-03-08 TW TW094106965A patent/TWI250930B/zh not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000015644A (ja) * | 1998-07-07 | 2000-01-18 | Mitsubishi Chemicals Corp | ディスク基板成形用金型 |
JP2003011180A (ja) * | 2001-07-05 | 2003-01-15 | Tdk Corp | 金型装置、ディスク基板 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010052229A (ja) * | 2008-08-27 | 2010-03-11 | Seikoh Giken Co Ltd | ディスク成形用金型、鏡面盤、ディスク基板及びその成形方法 |
Also Published As
Publication number | Publication date |
---|---|
US20070176311A1 (en) | 2007-08-02 |
TW200536701A (en) | 2005-11-16 |
KR100763475B1 (ko) | 2007-10-04 |
CN1929980A (zh) | 2007-03-14 |
TWI250930B (en) | 2006-03-11 |
JPWO2005084910A1 (ja) | 2007-12-06 |
KR20060126569A (ko) | 2006-12-07 |
EP1724084A1 (en) | 2006-11-22 |
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