CA2184206C - Molded glass plate produced by mold with modified surface - Google Patents
Molded glass plate produced by mold with modified surface Download PDFInfo
- Publication number
- CA2184206C CA2184206C CA002184206A CA2184206A CA2184206C CA 2184206 C CA2184206 C CA 2184206C CA 002184206 A CA002184206 A CA 002184206A CA 2184206 A CA2184206 A CA 2184206A CA 2184206 C CA2184206 C CA 2184206C
- Authority
- CA
- Canada
- Prior art keywords
- mold
- metallic mold
- carbon
- coating
- ion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000011521 glass Substances 0.000 title claims abstract description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 22
- 239000011248 coating agent Substances 0.000 claims abstract description 17
- 238000000576 coating method Methods 0.000 claims abstract description 17
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 239000000758 substrate Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000002344 surface layer Substances 0.000 claims description 7
- 239000010410 layer Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 abstract description 14
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- -1 nitrogen ions Chemical class 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000005401 pressed glass Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
- C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
- C03B11/084—Construction of plunger or mould for making solid articles, e.g. lenses material composition or material properties of press dies therefor
- C03B11/086—Construction of plunger or mould for making solid articles, e.g. lenses material composition or material properties of press dies therefor of coated dies
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B40/00—Preventing adhesion between glass and glass or between glass and the means used to shape it, hold it or support it
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/02—Pretreatment of the material to be coated
- C23C16/0254—Physical treatment to alter the texture of the surface, e.g. scratching or polishing
- C23C16/0263—Irradiation with laser or particle beam
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/02—Pretreatment of the material to be coated
- C23C16/0272—Deposition of sub-layers, e.g. to promote the adhesion of the main coating
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/739—Magnetic recording media substrates
- G11B5/73911—Inorganic substrates
- G11B5/73913—Composites or coated substrates
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/739—Magnetic recording media substrates
- G11B5/73911—Inorganic substrates
- G11B5/73921—Glass or ceramic substrates
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
- G11B5/8404—Processes or apparatus specially adapted for manufacturing record carriers manufacturing base layers
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/02—Press-mould materials
- C03B2215/08—Coated press-mould dies
- C03B2215/14—Die top coat materials, e.g. materials for the glass-contacting layers
- C03B2215/24—Carbon, e.g. diamond, graphite, amorphous carbon
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/40—Product characteristics
- C03B2215/44—Flat, parallel-faced disc or plate products
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2215/00—Press-moulding glass
- C03B2215/40—Product characteristics
- C03B2215/45—Ring or doughnut disc products or their preforms
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Toxicology (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Magnetic Record Carriers (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Manufacturing Optical Record Carriers (AREA)
- Liquid Crystal (AREA)
Abstract
A mold for pressing molded glass plates where the desired flatness of the shaped surface of the metallic mold-made of super-hard material- is achieved by carbon coating. Before the carbon coating is applied, ions are injected into the mold surface. This increases the adhesiveness of the carbon coating resulting in an increased usable life for the mold.
Description
SPECIFICATION
1. TITLE OF THE INVENTION
Molded Glass Plate Produced by Mold with Modified Surface.
1. TITLE OF THE INVENTION
Molded Glass Plate Produced by Mold with Modified Surface.
2. BACKGROUND OF THE INVENTION
This invention relates to a mold for pressing glass plates for hard disks for computer memory and the molded glass substrates produced by using it.
Up to the present., generally hard disks made of aluminum substrate coated with magnetic materials were used. But because many grinding processes are required to obtain a specified surface roughness on the aluminum substrate, production costs are high.
In consideration of the above, the object of this invention is to provide press molds that are able to abtain a specified surface roughness, and the glass substrates for use in computer memory devices pressed by the press molds, both being produced at low cost.
This invention relates to a mold for pressing glass plates for hard disks for computer memory and the molded glass substrates produced by using it.
Up to the present., generally hard disks made of aluminum substrate coated with magnetic materials were used. But because many grinding processes are required to obtain a specified surface roughness on the aluminum substrate, production costs are high.
In consideration of the above, the object of this invention is to provide press molds that are able to abtain a specified surface roughness, and the glass substrates for use in computer memory devices pressed by the press molds, both being produced at low cost.
3. BRIEF DESCRIPTION OF THE INVENTION
According to this invention, the metallic mold coated with graphite or amorphous type carbon to achieve required flatness has nitrogen ions injected onto the surface of the super-hard mold material just before carbon coating, thus the surface layer of the mold is modified.
As a result of this pracess, it becomes possible to increase the adhesiveness of the carbon onto the mold and the life of the mold can be greatly extended.
In this invention, ion injection is performed to at least a depth of 0.5 ~,m into the surface, and thereafter carbon coating is performed at least a 0.1-1 ~m thickness on the ion-injected surface. Also the surface is treated so that the flatness reaches 2/1000-8/1000 mm.
Further, according to this invention, glass plates used as glass substrates for computer memory are molded by using the metallic mold on which the surface has been modified by injecting ions before coating with carbon of type graphite or amorphous diamond.
In accordance with one aspect of the present invention, there is provided a nuetallic mold for pressing a molded glass substrate for use in computer memory devices, in which a required flatness is achieved by coating the surface of said metallic mold made of super-hard material with carbon, characterized in that said surface of said metallic mold is ion injected and said. surface layer is modified in advance of carbon coating.
In accordance with another aspect of the present invention, there is provided a molded glass substrate for a computer memory, wherein the substrate is manufactured by heating to a softening temperature a glass material for the glass substrate that has been preshaped in a circular disk, molding the material by using a metallic mold that is heated to a temperature substantially equal to that of said glass material, and then gradually cooling the material to room temperature so as to eliminate the necessity of a grinding step after molding; wherein said mold is a metallic mold, made of super-hard material, for which a required flatness is secured by coating t:he surface of said metallic mold with carbon, and with said metallic mold characterized such that its surface is modified by ion injection in advance of said carbon coating.
According to this invention, the metallic mold coated with graphite or amorphous type carbon to achieve required flatness has nitrogen ions injected onto the surface of the super-hard mold material just before carbon coating, thus the surface layer of the mold is modified.
As a result of this pracess, it becomes possible to increase the adhesiveness of the carbon onto the mold and the life of the mold can be greatly extended.
In this invention, ion injection is performed to at least a depth of 0.5 ~,m into the surface, and thereafter carbon coating is performed at least a 0.1-1 ~m thickness on the ion-injected surface. Also the surface is treated so that the flatness reaches 2/1000-8/1000 mm.
Further, according to this invention, glass plates used as glass substrates for computer memory are molded by using the metallic mold on which the surface has been modified by injecting ions before coating with carbon of type graphite or amorphous diamond.
In accordance with one aspect of the present invention, there is provided a nuetallic mold for pressing a molded glass substrate for use in computer memory devices, in which a required flatness is achieved by coating the surface of said metallic mold made of super-hard material with carbon, characterized in that said surface of said metallic mold is ion injected and said. surface layer is modified in advance of carbon coating.
In accordance with another aspect of the present invention, there is provided a molded glass substrate for a computer memory, wherein the substrate is manufactured by heating to a softening temperature a glass material for the glass substrate that has been preshaped in a circular disk, molding the material by using a metallic mold that is heated to a temperature substantially equal to that of said glass material, and then gradually cooling the material to room temperature so as to eliminate the necessity of a grinding step after molding; wherein said mold is a metallic mold, made of super-hard material, for which a required flatness is secured by coating t:he surface of said metallic mold with carbon, and with said metallic mold characterized such that its surface is modified by ion injection in advance of said carbon coating.
4. BRIEF DESCRIPTION OF THE DRAWING
Fig. 1 shows a glass substrate for computer memory molded by using a metallic mold according to this invention.
Fig. 1 shows a glass substrate for computer memory molded by using a metallic mold according to this invention.
5. DETAILED DESCRIPTION OF THE INVENTION
The embodiment of this invention is described in detail as follows. Herein, a metallic mold made of super-hard material, having a surface plane of more than 8/1000 mm is modified in forming Gauss distribution on the surface layer by ion injection such as a Nitrogen atomic ion in advance of coating with graphite or amorphous diamond-type carbon.
Namely, an ion-injected layer is shaped to a depth of at least 0.5 ~.m into the surface of a super-hard alloy by ion injection, and then carbon coat is provided in a depth at least 0.1-1 ~m on the ion-injected layer. The last layer of the surface is flattened so as to keep the flatness in the range of 2/1000-8/1000 mm.
By applying the metallic mold according to this invention, it becomes possible to mold a glass substrate 1 for use computer memory devices as shown in the drawings.
In the ion-injection method applying high frequency discharging (105-107 132) makes it possible to inject ions to a depth of at least 0.5 ~m into the surface layer of the metallic mold by keeping ionizing current at 10 mA, ion irradiation at 1.x102 ions/cm2 (100 doses), temperature at 300-500°C, and a duration of 10-40 seconds. The metallic mold is then coated with an amorphous diamond type of carbon to a thickness of at least 0.1-1 ~m on the ionized layer.
For example, when pressing a glass plate of 63 mm ~ (diameter) by applying the metallic mold according to this invention, first the glass plate which is preshaped in a circular disk is heated to the softening temperature of glass material, then the heated glass plate is loaded into the metallic mold heated to the same temperature, and then pressed. After press:rng, the pressed glass plate is gradually cooled, over a period of 15-20 minutes, down to room temperature. Despite repeating 100,000 applications of this operation, peeling off. of the carbon coat from the surface of the metallic mold was never seen. The effectiveness of this invention is reflected in the actual results.
The reason that the life of the metallic mold was considerably extended appears to be that the fatigue of the metallic mold is decreased by keeping the glass temperature and the mold temperature approximately equal, together with the improved peeling off property of the metallic mold owing to the ion radiation.
As described above in detail, in this inventions before application of the c:~arbon coating the shaped surface of the metallic mold is modified in the surface layer thereof by ion-injection, thereby it. becomes possible to greatly increase the adhesiveness of the carbon coat onto the metallic mold and to extend the life of the metallic mold. Further elimination of a polishing step applied to the pressed product results from the high -graded flatness of the molded glass plates.
After producing glass substrates using the mold and process described in this invention, the surface of the glass substrates can be coated with magnetic materials.
The embodiment of this invention is described in detail as follows. Herein, a metallic mold made of super-hard material, having a surface plane of more than 8/1000 mm is modified in forming Gauss distribution on the surface layer by ion injection such as a Nitrogen atomic ion in advance of coating with graphite or amorphous diamond-type carbon.
Namely, an ion-injected layer is shaped to a depth of at least 0.5 ~.m into the surface of a super-hard alloy by ion injection, and then carbon coat is provided in a depth at least 0.1-1 ~m on the ion-injected layer. The last layer of the surface is flattened so as to keep the flatness in the range of 2/1000-8/1000 mm.
By applying the metallic mold according to this invention, it becomes possible to mold a glass substrate 1 for use computer memory devices as shown in the drawings.
In the ion-injection method applying high frequency discharging (105-107 132) makes it possible to inject ions to a depth of at least 0.5 ~m into the surface layer of the metallic mold by keeping ionizing current at 10 mA, ion irradiation at 1.x102 ions/cm2 (100 doses), temperature at 300-500°C, and a duration of 10-40 seconds. The metallic mold is then coated with an amorphous diamond type of carbon to a thickness of at least 0.1-1 ~m on the ionized layer.
For example, when pressing a glass plate of 63 mm ~ (diameter) by applying the metallic mold according to this invention, first the glass plate which is preshaped in a circular disk is heated to the softening temperature of glass material, then the heated glass plate is loaded into the metallic mold heated to the same temperature, and then pressed. After press:rng, the pressed glass plate is gradually cooled, over a period of 15-20 minutes, down to room temperature. Despite repeating 100,000 applications of this operation, peeling off. of the carbon coat from the surface of the metallic mold was never seen. The effectiveness of this invention is reflected in the actual results.
The reason that the life of the metallic mold was considerably extended appears to be that the fatigue of the metallic mold is decreased by keeping the glass temperature and the mold temperature approximately equal, together with the improved peeling off property of the metallic mold owing to the ion radiation.
As described above in detail, in this inventions before application of the c:~arbon coating the shaped surface of the metallic mold is modified in the surface layer thereof by ion-injection, thereby it. becomes possible to greatly increase the adhesiveness of the carbon coat onto the metallic mold and to extend the life of the metallic mold. Further elimination of a polishing step applied to the pressed product results from the high -graded flatness of the molded glass plates.
After producing glass substrates using the mold and process described in this invention, the surface of the glass substrates can be coated with magnetic materials.
Claims (5)
1. A metallic mold for pressing a molded glass substrate for use in computer memory devices, in which a required flatness is achieved by coating the surface of said metallic mold made of super-hard material with carbon, characterized in that said surface of said metallic mold is ion injected and said surface layer is modified in advance of carbon coating.
2. The metallic mold for pressing a molded glass substrate for use in computer memory devices in claim 1, wherein said surface of said mold is ion-injected to a depth of at least 0.5 µm into said surface layer thereof.
3. The metallic mold for pressing a glass plate in claim 1, wherein said carbon coating is of at least a 0.1-1 µm thickness on said ionized layer.
4. A molded glass substrate for a computer memory, wherein the substrate is manufactured by heating to a softening temperature a glass material for the glass substrate that has been preshaped in a circular disk, molding the material by using a metallic mold that is heated to a temperature substantially equal to that of said glass material, and then gradually cooling the material to room temperature so as to eliminate the necessity of a grinding step after molding;
wherein said mold is a metallic mold, made of super-hard material, for which a required flatness is secured by coating the surface of said metallic mold with carbon, and with said metallic mold characterized such that its surface is modified by ion injection in advance of said carbon coating.
wherein said mold is a metallic mold, made of super-hard material, for which a required flatness is secured by coating the surface of said metallic mold with carbon, and with said metallic mold characterized such that its surface is modified by ion injection in advance of said carbon coating.
5
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US52058595A | 1995-08-29 | 1995-08-29 | |
| US520,585 | 1995-08-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2184206A1 CA2184206A1 (en) | 1997-03-01 |
| CA2184206C true CA2184206C (en) | 2002-10-08 |
Family
ID=24073252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002184206A Expired - Fee Related CA2184206C (en) | 1995-08-29 | 1996-08-27 | Molded glass plate produced by mold with modified surface |
Country Status (13)
| Country | Link |
|---|---|
| JP (2) | JP3275091B2 (en) |
| KR (1) | KR100385257B1 (en) |
| CN (1) | CN1102470C (en) |
| AU (1) | AU718549B2 (en) |
| CA (1) | CA2184206C (en) |
| DE (1) | DE19634974A1 (en) |
| FR (1) | FR2738236B1 (en) |
| GB (1) | GB2304736B (en) |
| IL (1) | IL119144A0 (en) |
| MY (1) | MY115041A (en) |
| NL (1) | NL1003899C2 (en) |
| SG (1) | SG47172A1 (en) |
| ZA (1) | ZA967329B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999006333A1 (en) * | 1997-07-30 | 1999-02-11 | Hoya Corporation | Method of producing glass substrate for information recording medium |
| NL1008105C2 (en) * | 1998-01-23 | 1999-07-26 | Axxicon Moulds Eindhoven Bv | Injection mold. |
| JP2002079522A (en) * | 2000-06-23 | 2002-03-19 | Hitachi Maxell Ltd | Die for molding disk substrate and die for molding resin |
| JP4702201B2 (en) * | 2006-06-28 | 2011-06-15 | 東洋製罐株式会社 | Resin processing parts |
Family Cites Families (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA968561A (en) * | 1970-11-27 | 1975-06-03 | Gerald E. Blair | Method for molding glass lenses |
| DE3533856A1 (en) * | 1985-09-23 | 1987-05-21 | Wilhelm Koenig | Apparatus for producing hard discs of glass |
| JPS6483529A (en) * | 1987-09-28 | 1989-03-29 | Hoya Corp | Production of glass forming mold |
| DE3800567A1 (en) * | 1988-01-12 | 1989-07-20 | Wilhelm Koenig | Compression mould for pressing hard glass diskettes |
| DE3808380A1 (en) * | 1988-03-12 | 1989-09-21 | Wilhelm Koenig | Process for embossing fixed programs on glass discs and apparatus for carrying out the process |
| JPH01301864A (en) * | 1988-05-31 | 1989-12-06 | Hoya Corp | Manufacture of glass forming die |
| US5026415A (en) * | 1988-08-16 | 1991-06-25 | Canon Kabushiki Kaisha | Mold with hydrogenated amorphous carbon film for molding an optical element |
| US5202156A (en) * | 1988-08-16 | 1993-04-13 | Canon Kabushiki Kaisha | Method of making an optical element mold with a hard carbon film |
| JPH0624991B2 (en) * | 1988-08-24 | 1994-04-06 | 松下電器産業株式会社 | Mold for press molding of optical glass element |
| US5380349A (en) * | 1988-12-07 | 1995-01-10 | Canon Kabushiki Kaisha | Mold having a diamond layer, for molding optical elements |
| JP2572438B2 (en) * | 1989-01-30 | 1997-01-16 | ホーヤ株式会社 | Manufacturing method of glass press mold |
| JP2837700B2 (en) * | 1989-08-23 | 1998-12-16 | ティーディーケイ株式会社 | Method for forming diamond-like thin film |
| US5112025A (en) * | 1990-02-22 | 1992-05-12 | Tdk Corporation | Molds having wear resistant release coatings |
| US5246198A (en) * | 1990-06-01 | 1993-09-21 | Canon Kabushiki Kaisha | Diamond crystal coated mold for forming optical elements |
| GB9019219D0 (en) * | 1990-09-01 | 1990-10-17 | Atomic Energy Authority Uk | Diamond-like carbon coatings |
| US5125945A (en) * | 1991-04-09 | 1992-06-30 | Corning Incorporated | Method and apparatus for parallel alignment of opposing mold surfaces by controlling the thermal expansion of the apparatus |
| JP3009761B2 (en) * | 1991-07-26 | 2000-02-14 | 日本タングステン株式会社 | Mold material for molding |
| FR2682125A1 (en) * | 1991-10-07 | 1993-04-09 | Nitruvid | PROCESSING PROCESS FOR DEPOSITING A CARBON LAYER IN A STEAM PHASE ON THE SURFACE OF A METAL PART AND A PART THUS OBTAINED. |
| JP3049132B2 (en) * | 1991-10-11 | 2000-06-05 | オリンパス光学工業株式会社 | Manufacturing method of optical element molding die and optical element molding die |
| US5347887A (en) * | 1993-03-11 | 1994-09-20 | Microsurgical Techniques, Inc. | Composite cutting edge |
| JPH06320636A (en) * | 1993-05-12 | 1994-11-22 | Canon Inc | Production of mold for molding optical element |
| JPH0790553A (en) * | 1993-09-27 | 1995-04-04 | Shojiro Miyake | Sliding member and its production |
| JPH07109128A (en) * | 1993-10-12 | 1995-04-25 | Hoya Corp | Mold for molding glass and its production |
| US5458927A (en) * | 1995-03-08 | 1995-10-17 | General Motors Corporation | Process for the formation of wear- and scuff-resistant carbon coatings |
| GB2300424A (en) * | 1995-05-01 | 1996-11-06 | Kobe Steel Europ Ltd | Diamond growth on ion implanted surfaces |
-
1996
- 1996-08-27 CA CA002184206A patent/CA2184206C/en not_active Expired - Fee Related
- 1996-08-28 IL IL11914496A patent/IL119144A0/en not_active IP Right Cessation
- 1996-08-28 NL NL1003899A patent/NL1003899C2/en not_active IP Right Cessation
- 1996-08-28 JP JP24399996A patent/JP3275091B2/en not_active Expired - Fee Related
- 1996-08-28 JP JP8243998A patent/JP2909724B2/en not_active Expired - Fee Related
- 1996-08-28 AU AU64322/96A patent/AU718549B2/en not_active Ceased
- 1996-08-28 FR FR9610531A patent/FR2738236B1/en not_active Expired - Fee Related
- 1996-08-29 ZA ZA967329A patent/ZA967329B/en unknown
- 1996-08-29 KR KR1019960036268A patent/KR100385257B1/en not_active IP Right Cessation
- 1996-08-29 SG SG1996010532A patent/SG47172A1/en unknown
- 1996-08-29 MY MYPI96003599A patent/MY115041A/en unknown
- 1996-08-29 GB GB9618034A patent/GB2304736B/en not_active Expired - Fee Related
- 1996-08-29 DE DE19634974A patent/DE19634974A1/en not_active Withdrawn
- 1996-08-29 CN CN96113357A patent/CN1102470C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| GB9618034D0 (en) | 1996-10-09 |
| FR2738236B1 (en) | 1999-03-12 |
| NL1003899A1 (en) | 1997-03-03 |
| GB2304736A (en) | 1997-03-26 |
| JP2909724B2 (en) | 1999-06-23 |
| CA2184206A1 (en) | 1997-03-01 |
| KR100385257B1 (en) | 2003-08-09 |
| NL1003899C2 (en) | 1998-02-12 |
| JPH09183622A (en) | 1997-07-15 |
| ZA967329B (en) | 1997-03-04 |
| KR970010687A (en) | 1997-03-27 |
| SG47172A1 (en) | 1998-03-20 |
| CN1102470C (en) | 2003-03-05 |
| FR2738236A1 (en) | 1997-03-07 |
| CN1147983A (en) | 1997-04-23 |
| AU6432296A (en) | 1997-03-06 |
| JPH09194227A (en) | 1997-07-29 |
| MY115041A (en) | 2003-03-31 |
| IL119144A0 (en) | 1996-11-14 |
| GB2304736B (en) | 1999-09-22 |
| DE19634974A1 (en) | 1997-03-27 |
| AU718549B2 (en) | 2000-04-13 |
| JP3275091B2 (en) | 2002-04-15 |
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| EEER | Examination request | ||
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