EP1268876A1 - Verfahren zum herstellen eines elementes aus polykristallischem diamant sowie danach hergestelltes element - Google Patents
Verfahren zum herstellen eines elementes aus polykristallischem diamant sowie danach hergestelltes elementInfo
- Publication number
- EP1268876A1 EP1268876A1 EP01915330A EP01915330A EP1268876A1 EP 1268876 A1 EP1268876 A1 EP 1268876A1 EP 01915330 A EP01915330 A EP 01915330A EP 01915330 A EP01915330 A EP 01915330A EP 1268876 A1 EP1268876 A1 EP 1268876A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- diamond
- substrate
- demolding
- carried out
- mold
- 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.)
- Withdrawn
Links
Classifications
-
- 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
-
- 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
- C23C16/01—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes on temporary substrates, e.g. substrates subsequently removed by etching
-
- 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
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/26—Deposition of carbon only
- C23C16/27—Diamond only
Definitions
- the invention relates to a method for producing an element from polycrystalline diamond, wherein a substrate is shaped with a surface complementary to a surface of the element, this formation is then coated by diamond deposition, and then the element made of diamond is demolded and finished before or after demolding becomes.
- a lens array can then be produced from a thermoplastic material by molding (W. Menz, J. Mohr, "Microsystem Technology for Engineers” 1997, pages 207 to 209).
- the individual cells also have only a very small diameter in the tenth of a millimeter range. Besides, that is Forming limited to parts of a sphere. Spherical surfaces with a large radius cannot be realized with this.
- the object of the present invention is to provide a method for producing elements made of diamond which is comparatively simple and inexpensive to carry out and with which elements, in particular also optical lenses, can be produced which have practically any shape of surfaces, in particular also spherical surfaces with a large size Have radius of curvature.
- the substrate be machined to form the complementary, at least one spherical surface formation and then overgrown with polycrystalline diamond by means of diamond CVD (chemical vapor deposition).
- diamond CVD chemical vapor deposition
- This method according to the invention enables the production of a substrate with shapes that are designed to be application-oriented and that can also be designed with a large area, in particular also spherically with a large radius of curvature. Thanks to the diamond coating and subsequent molding, elements can be made from diamond with dimensions down to the centimeter range.
- the layer thickness is dimensioned such that, for example, a depression is completely filled in as a molding.
- the shaping (s) in the substrate can be prepared by a grinding method known from the loom grinding, the machining being carried out in particular by grinding, lapping, polishing. This means that a conventional, tried-and-tested process is used with which the shaping (s) can be produced precisely and with a high surface quality.
- One embodiment of the invention provides that for the simultaneous production of a large number of elements, in particular optical lenses (array), a substrate is provided with a corresponding number of emformations and then a coherent diamond coating covering the emformations is carried out.
- the coherent diamond coating can be further processed into an array, for example a lens field, by planpolishing the growth side of the coherent diamond layer.
- a large number of optical lenses for example, can be produced at the same time.
- it is segmented into individual components.
- the diamond growth side can be edited either before or after segmentation.
- optical lenses or similar elements are advantageously separated or segmented by laser cutting.
- the segmentation can thus be carried out precisely, quickly and without tool wear.
- Silicon or metal preferably molybdenum, can be used as the substrate.
- Silicon as a substrate has the advantage that extremely smooth, reflective surfaces can be produced in the shape or shapes, which has a direct effect on the quality of the surface of the optical element, for example.
- the coefficient of thermal expansion which is significantly higher than that of diamond, can be used for demolding, with molybdenum being particularly favorable. Demolding by thermal shock treatment enables the substrate shape to be used multiple times.
- FIG. 1 to 4 show the individual process steps for producing a plano-convex Diamantl se 1.
- Use is made of an impression technique in which a substrate 2 forms a mold, the shaping 3 of which is coated with diamond and this coating after machining of the Substrate 2 is separated from a demolding process.
- F ⁇ g.1 shows the substrate 2 m, one surface side of which the formation 3 is introduced by machining. In the exemplary embodiment shown, it is a concave shape in the case of the element to be produced, in the exemplary embodiment of a plano-convex lens, to form the complementary, convex side.
- the formation 3 m of the substrate 2 is machined, using grinding methods known from the loom grinder. To achieve a high surface quality with the lowest roughness, special grinding methods such as lapping and / or polishing the surface can follow after the shaping 3 has been worked out.
- the substrate can consist of silicon or a metal, preferably molybdenum.
- the substrate is overgrown with a CVD diamond layer 4 on the formation side, as shown in FIG.
- the layer thickness is dimensioned so that the spherical depression or the like formation is completely filled.
- the growth side 5 is plane-polished before demolding according to FIG. 3 in order to create a plano-convex diamond lens 1. It should be mentioned here that the growth side 5 can also be machined in such a way that a convex or concave surface is created in order to form a biconvex or concave-convex lens. For a plano-concave diamond lens, there is also the possibility of shaping the formation 3 complementarily to the concave lens side at the substrate by convexly shaping the surface of the substrate 2.
- the diamond lens is demolded and thus separated from the substrate 2. This can be done by dissolving the substrate 2 in acid or alkali. Especially when using silicon as The substrate can be removed from the mold by etching away. If metal is used as the substrate, the coefficient of expansion of the metal substrate, which is high relative to diamond, can be used for the demolding process. This can take place during the cooling phase after completion of the CVD coating, where the diamond layer retains its shape from the substrate 2 by thermal shock.
- the structured substrate 2 can be used several times in this case.
- FIGS. 5 to 9 show the process steps for the simultaneous production of a plurality of cells 1 a (FIG. 9) or a lens array 1 b according to FIG. 8.
- the substrate two has a corresponding number of shapes 3a on its shaping side corresponding to the number of lenses to be produced.
- the sectional view only shows a number of shapes 3a, although, for example, several rows of shapes are provided next to one another to form an lens array.
- the further process sequence according to FIGS. 6 and 7 corresponds to the process sequence described with reference to FIGS. 2 and 3.
- the contiguous lens field n cells 1a can be segmented. This separation is preferably carried out by laser cutting.
- the growth side of the diamond layer is processed while it is still connected to the substrate. But there is also the possibility that this processing is only carried out after demolding.
- the method according to the invention is particularly suitable for producing optical lenses which, if necessary, can have a diameter in the millimeter range, for example a diameter of three millimeters.
- Such optical elements made of diamond can also be used in aggressive environments, since they are scratch-resistant, chemically resistant, temperature-stable and broadband transparent.
- decoupling optics for optical fibers particularly in the IR range, robust focusing lenses for high-power lasers, especially for use in material processing, scratch-resistant lenses for microscope objectives.
- other elements with at least one spherical surface can also be made of diamond, for example wear-resistant probe tips, which can be used for measuring the thickness of moving objects (e.g. strips, foils, turned parts) and which have a correspondingly long service life due to their material properties.
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10015729A DE10015729B4 (de) | 2000-03-29 | 2000-03-29 | Verfahren zum Herstellen eines Elementes aus polykristallinem Diamant sowie danach hergestelltes Element |
| DE10015729 | 2000-03-29 | ||
| PCT/EP2001/002838 WO2001073158A1 (de) | 2000-03-29 | 2001-03-14 | Verfahren zum herstellen eines elementes aus polykristallischem diamant sowie danach hergestelltes element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1268876A1 true EP1268876A1 (de) | 2003-01-02 |
Family
ID=7636910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01915330A Withdrawn EP1268876A1 (de) | 2000-03-29 | 2001-03-14 | Verfahren zum herstellen eines elementes aus polykristallischem diamant sowie danach hergestelltes element |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20030108476A1 (de) |
| EP (1) | EP1268876A1 (de) |
| DE (1) | DE10015729B4 (de) |
| WO (1) | WO2001073158A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006025704B3 (de) * | 2006-06-01 | 2007-12-20 | Siemens Ag | Verfahren und Vorrichtung zum Betätigen einer Parkbremse |
| GB201209424D0 (en) * | 2012-05-28 | 2012-07-11 | Element Six Ltd | Free-standing non-planar polycrystalline synthetic diamond components |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5011509A (en) * | 1989-08-07 | 1991-04-30 | Frushour Robert H | Composite compact with a more thermally stable cutting edge and method of manufacturing the same |
| CA2034440A1 (en) * | 1990-02-13 | 1991-08-14 | Thomas R. Anthony | Cvd diamond workpieces and their fabrication |
| DE4219436C2 (de) * | 1992-06-13 | 1994-11-10 | Fraunhofer Ges Forschung | Verfahren zur Abscheidung glatter polykristalliner Schichten |
| EP0618043A1 (de) * | 1993-03-29 | 1994-10-05 | AT&T Corp. | Gegenstand mit polykristallinem Diamant, und Verfahren zum Formen eines Diamants |
| CA2120175A1 (en) * | 1993-04-29 | 1994-10-30 | Louis K. Bigelow | Method for making a diamond coated structure |
| DE4331701A1 (de) * | 1993-09-17 | 1995-03-23 | Fraunhofer Ges Forschung | Verfahren zur Herstellung von polykristallinen Diamantschichten |
| US5458827A (en) * | 1994-05-10 | 1995-10-17 | Rockwell International Corporation | Method of polishing and figuring diamond and other superhard material surfaces |
| GB9425712D0 (en) * | 1994-12-20 | 1995-02-22 | De Beers Ind Diamond | Diffractive optics |
| DE19530161C2 (de) * | 1995-08-03 | 1997-11-20 | Fraunhofer Ges Forschung | Verfahren zum Herstellen von Diamantschichten |
-
2000
- 2000-03-29 DE DE10015729A patent/DE10015729B4/de not_active Expired - Lifetime
-
2001
- 2001-03-14 US US10/240,185 patent/US20030108476A1/en not_active Abandoned
- 2001-03-14 EP EP01915330A patent/EP1268876A1/de not_active Withdrawn
- 2001-03-14 WO PCT/EP2001/002838 patent/WO2001073158A1/de not_active Ceased
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO0173158A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2001073158A1 (de) | 2001-10-04 |
| DE10015729B4 (de) | 2005-09-08 |
| DE10015729A1 (de) | 2001-10-18 |
| US20030108476A1 (en) | 2003-06-12 |
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Legal Events
| Date | Code | Title | Description |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| 17P | Request for examination filed |
Effective date: 20020921 |
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| AK | Designated contracting states |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DERANGEWAND |
|
| 17Q | First examination report despatched |
Effective date: 20031024 |
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| 17Q | First examination report despatched |
Effective date: 20031024 |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWAN |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20101001 |