EP3764167A1 - Verfahren zum erhalten einer uhrenkomponente, deren oberfläche zumindest zum teil mit einer farbschicht beschichtet ist - Google Patents

Verfahren zum erhalten einer uhrenkomponente, deren oberfläche zumindest zum teil mit einer farbschicht beschichtet ist Download PDF

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Publication number
EP3764167A1
EP3764167A1 EP19185373.8A EP19185373A EP3764167A1 EP 3764167 A1 EP3764167 A1 EP 3764167A1 EP 19185373 A EP19185373 A EP 19185373A EP 3764167 A1 EP3764167 A1 EP 3764167A1
Authority
EP
European Patent Office
Prior art keywords
layer
obtaining
colored layer
covered
watch component
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.)
Pending
Application number
EP19185373.8A
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English (en)
French (fr)
Inventor
Laurent Guillot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Patek Philippe SA Geneve
Original Assignee
Patek Philippe SA Geneve
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Priority to EP19185373.8A priority Critical patent/EP3764167A1/de
Publication of EP3764167A1 publication Critical patent/EP3764167A1/de
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B45/00—Time pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effects
    • G04B45/0076—Decoration of the case and of parts thereof, e.g. as a method of manufacture thereof
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/04—Hands; Discs with a single mark or the like
    • G04B19/042—Construction and manufacture of the hands; arrangements for increasing reading accuracy
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/06—Dials
    • G04B19/12—Selection of materials for dials or graduations markings

Definitions

  • the present invention relates to a process for micro-manufacturing a watch component, and it relates more specifically to a process for obtaining surfaces coated with a colored layer at least in places of such a component, said surfaces being surfaces of silicon, of oxidized silicon or of glass (optionally of metallic glass).
  • This first aspect relates in particular to such a method in which said surfaces are different plots of the surface of a wafer in which it is planned to then micro-manufacture a batch of watch components.
  • said surfaces could also each be formed by the surface of one of the components of the batch of watch components, or alternatively by the surface of one of the blanks of a batch of blanks of watch components.
  • the present invention relates to a watch component whose surface is covered at least in places with a paint, a lacquer, or a varnish having a specific color.
  • a paint a lacquer, or a varnish having a specific color.
  • the expression “colored layer” will be used to designate generally all colored varnishes, paints, lacquers and the like. On the other hand, we will qualify as “colored” a thing "which has one or more colors”.
  • An aim of the present invention is to remedy the drawbacks of the prior art which have just been explained.
  • the present invention achieves this goal and others by providing, on the one hand, a process for obtaining a surface of silicon, silicon oxide or glass, covered with a colored layer at least in places, according to the appended claim 1, and further providing a component for a timepiece the surface of which is at least partially covered with a colored layer, and which is in accordance with the appended claim 9.
  • step b can be carried out using any technique that a person skilled in the art deems appropriate .
  • spraying spraying
  • dipping dipping
  • brush etc.
  • the layer of metal deposited during step (a) is a layer of titanium.
  • an oxygen source such as air or water
  • a passive oxide layer of a few nanometers is instantly formed. Then the oxide layer only grows very slowly. This layer is very adherent and resistant. It will protect the titanium from corrosion.
  • the layer is thin enough not to interfere with the adhesion of the colored layer.
  • the figure 1 attached is a schematic vertical sectional view of a minute hand made from mono- or poly-crystalline silicon.
  • the needle shown in figure 1 constitutes an exemplary embodiment of the horological component of the invention.
  • the silicon body 3 of the needle 1 is coated on all sides with a silicon oxide layer 5, the thickness of which is of the order of 1. micron.
  • the silicon could for example not be coated with oxide, or else, the body of the needle 1 could be made of another material. different from silicon.
  • the choice of material from which the body of the watch component is made is not decisive, provided that the surface covered by the bonding layer and the colored layer is made of silicon, oxidized silicon or glass, advantageously, in oxidized silicon.
  • the figure 2 is a cross section along 2-2 of the figure 1 .
  • the schematic representation of the figure 2 does not respect the proportions between the thicknesses of the different layers; the aim being to make the drawing easier to read.
  • a bonding layer 7 covers the SiO 2 surface of the upper face of the needle 1.
  • the layer 7 can be made of titanium, chromium, tantalum. , their oxides and nitrides, as well as in alloys of these metals.
  • Layer 7 can advantageously be made of titanium, chromium, tantalum and their oxides, and preferably titanium or titanium oxide.
  • An example of an alloy is titanium-tungsten.
  • the thickness of the tie layer is advantageously at least 5 nanometers, it is most advantageously between 10 and 50 nanometers, and it is preferably between 10 and 25 nanometers.
  • the choice of a bonding layer whose thickness does not exceed 50 nanometers makes it possible to prevent the presence of this from disturbing the thermal or mechanical behavior of the part.
  • the bonding layer 7 is covered by a colored layer referenced 9. Thanks to the characteristics of the invention, the coating based on paint, lacquer, or varnish having a specific color, adheres perfectly to the surface of the coating. watch component and normally no alteration is observed over the long term as long as the watch component is an internal component, for example a hand, a screw, a dial, a bridge, a plate, an oscillating weight, etc.
  • the hands like the minute hand 1 in particular, are very small. Indeed, their width rarely exceeds a few hundred microns.
  • the Applicant has observed that the colored layer formed on the upper face of the needle 1 sometimes has a circumferential bead (not shown).
  • This bead is an edge effect caused by the surface tension present in the liquid colored layer at the time of its application.
  • the circumferential bead is caused by an accumulation of liquid in the regions where the layer 9 straddles two surfaces which make an angle with each other.
  • the two surfaces in question may be the horizontal upper face and the vertical edge of the hand 1.
  • the Applicant has succeeded in preventing such edge effects from appearing by roughening. the surface which is intended to be coated with the colored layer.
  • the figures 3, 4 and 5 appended are three schematic diagrams similar to that of the figure 2 , and each illustrating the result of a separate step of a process for obtaining a surface coated with a colored layer at least in places and which is in accordance with an exemplary embodiment of the invention.
  • the figures 3, 4 and 5 are schematic cross-sectional views showing the evolution of the blank of an hour hand 51 during production.
  • the needle 51 comprises a crystalline silicon body (referenced 53) coated on all sides with a layer of silicon oxide 55, the thickness of which is the order of 1 micron.
  • the rough surface consists of the layer of silicon oxide 55 which covers the upper face of the body of the needle 51. It will be understood, however, that according to other embodiments of the method of the invention, the silicon surface of the body of the needle 51 could have been roughened prior to the formation of the silicon oxide coating 55.
  • a bonding layer 57 covers the rough SiO 2 surface of the blank of the needle 51.
  • the layer 57 is made of titanium, chromium, tantalum, their oxides and nitrides, as well as alloys of these metals.
  • the tie layer 57 is formed by physical vapor deposition (PVD) or by chemical vapor deposition (CVD). Physical vapor deposition is the preferred variant. Indeed, one advantage of PVD is that it is compatible with techniques such as photolithography (lift-off type), sparing or mechanical masking, which make it possible to protect certain selected parts of the surface from the deposit.
  • the bonding layer 57 is made of titanium.
  • a titanium bond coat has the advantage of withstanding long exposure to ambient air without losing its effectiveness. This option gives in particular the possibility of delaying for several days, if necessary, the application of paints, lacquers or varnishes having specific colors on the bond coat. It will be understood that this possibility can prove to be particularly useful in the case where it is desired to apply several different colors.
  • the techniques PVD and CVD deposition have the advantage of making it possible to produce very thin bond layers. In the present example, the thickness of the layer 57 is between 5 and 50 nanometers. It will be understood that this thickness is sufficiently low for the tie layer 57 to reproduce the reliefs of the surface that it covers without significantly attenuating them.
  • a colored layer 59 covers the bonding layer 57 with which the upper face of the blank of the needle 51 is coated.
  • the colored layer is a layer of paint.
  • the step of applying the paint can be carried out using any technique that a person skilled in the art deems appropriate. For example, spraying (spray), dipping (dipping), brush, etc.
  • spraying spraying
  • dipping dipping
  • brush etc.
  • the surface of the colored layer is flat.
  • the paint has filled in the unevenness of the substrate because of its surface tension, for example, the paint used can be opaque red paint from the Berluran® brand.
  • the deposition of the titanium layer by PVD or CVD can be preceded by a step consisting in protecting the surface, so that only certain places thereof, including the places to be colored, are exposed to the metal in phase. steam.
  • an additional step consisting in removing, or in chemically dissolving, the protection put in place at the start of the process is also interposed between the deposition of the titanium layer and the application of the colored layer.
  • At least one additional layer of metal can be deposited between the primer layer and the colored layer.
  • the metal in this additional layer may be chosen from noble metals or platinoids, as well as their alloys. These include gold, ruthenium, rhodium, palladium, osmium, iridium, platinum and ruthenium.
  • the metal of this additional layer is advantageously gold.
  • This intermediate layer between the tack coat and the color layer can have an interesting aesthetic effect on the colored layer, in particular on a paint, such as improving the shine or the tint.
  • a layer of gold deposited by PVD or CVD on a titanium bonding layer will allow the color of the paint layer, or more generally of the colored layer, to have more brilliance.
  • the extent of the layer of paint, lacquer, or varnish having its own color will be included within the extent of the primer layer.
  • the colored layer only partially covers the tie layer. This particular embodiment makes it possible to play with the covering surfaces of the bonding layer, with at least one additional metal layer and / or at least one colored layer, in order to reveal different layers of colors. and thus create shapes and / or borders.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
EP19185373.8A 2019-07-10 2019-07-10 Verfahren zum erhalten einer uhrenkomponente, deren oberfläche zumindest zum teil mit einer farbschicht beschichtet ist Pending EP3764167A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19185373.8A EP3764167A1 (de) 2019-07-10 2019-07-10 Verfahren zum erhalten einer uhrenkomponente, deren oberfläche zumindest zum teil mit einer farbschicht beschichtet ist

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19185373.8A EP3764167A1 (de) 2019-07-10 2019-07-10 Verfahren zum erhalten einer uhrenkomponente, deren oberfläche zumindest zum teil mit einer farbschicht beschichtet ist

Publications (1)

Publication Number Publication Date
EP3764167A1 true EP3764167A1 (de) 2021-01-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19185373.8A Pending EP3764167A1 (de) 2019-07-10 2019-07-10 Verfahren zum erhalten einer uhrenkomponente, deren oberfläche zumindest zum teil mit einer farbschicht beschichtet ist

Country Status (1)

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EP (1) EP3764167A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4254077A1 (de) * 2022-03-29 2023-10-04 Seiko Epson Corporation Uhrenkomponente, uhr und herstellungsverfahren für eine uhrenkomponente
EP4254078A1 (de) * 2022-03-29 2023-10-04 Seiko Epson Corporation Uhrenteil, uhr und verfahren zur herstellung des uhrenteils

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2425783A1 (de) * 1973-06-01 1974-12-19 Citizen Watch Co Ltd Uhrenzifferblatt
EP0819995A1 (de) * 1995-04-07 1998-01-21 Citizen Watch Co., Ltd. Zifferblatt für eine mittels solarzellen betriebene uhr
EP2060534A1 (de) * 2007-11-16 2009-05-20 Nivarox-FAR S.A. Mikromechanisches Bauteil aus Silizium-Metall-Verbundmaterial und Verfahren zu dessen Herstellung
EP3339983A1 (de) * 2016-12-23 2018-06-27 The Swatch Group Research and Development Ltd Perlmuttsubstrat, das mit einer gelben schicht beschichtet ist
EP3375903A2 (de) * 2017-03-14 2018-09-19 Seiko Epson Corporation Uhrenteil und uhr

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2425783A1 (de) * 1973-06-01 1974-12-19 Citizen Watch Co Ltd Uhrenzifferblatt
EP0819995A1 (de) * 1995-04-07 1998-01-21 Citizen Watch Co., Ltd. Zifferblatt für eine mittels solarzellen betriebene uhr
EP2060534A1 (de) * 2007-11-16 2009-05-20 Nivarox-FAR S.A. Mikromechanisches Bauteil aus Silizium-Metall-Verbundmaterial und Verfahren zu dessen Herstellung
EP3339983A1 (de) * 2016-12-23 2018-06-27 The Swatch Group Research and Development Ltd Perlmuttsubstrat, das mit einer gelben schicht beschichtet ist
EP3375903A2 (de) * 2017-03-14 2018-09-19 Seiko Epson Corporation Uhrenteil und uhr

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4254077A1 (de) * 2022-03-29 2023-10-04 Seiko Epson Corporation Uhrenkomponente, uhr und herstellungsverfahren für eine uhrenkomponente
EP4254078A1 (de) * 2022-03-29 2023-10-04 Seiko Epson Corporation Uhrenteil, uhr und verfahren zur herstellung des uhrenteils

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