WO2017032760A1 - Procédé et dispositif d'application d'une structure sur un substrat rigide - Google Patents

Procédé et dispositif d'application d'une structure sur un substrat rigide Download PDF

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Publication number
WO2017032760A1
WO2017032760A1 PCT/EP2016/069856 EP2016069856W WO2017032760A1 WO 2017032760 A1 WO2017032760 A1 WO 2017032760A1 EP 2016069856 W EP2016069856 W EP 2016069856W WO 2017032760 A1 WO2017032760 A1 WO 2017032760A1
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WO
WIPO (PCT)
Prior art keywords
substrate
carrier film
structural
coating
carrier
Prior art date
Application number
PCT/EP2016/069856
Other languages
German (de)
English (en)
Inventor
Oliver Humbach
Original Assignee
Temicon Gmbh
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 Temicon Gmbh filed Critical Temicon Gmbh
Publication of WO2017032760A1 publication Critical patent/WO2017032760A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B05D1/286—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers using a temporary backing to which the coating has been applied
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/40—Distributing applied liquids or other fluent materials by members moving relatively to surface
    • B05D1/42—Distributing applied liquids or other fluent materials by members moving relatively to surface by non-rotary members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2252/00—Sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
    • B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
    • B05D3/065—After-treatment
    • B05D3/067—Curing or cross-linking the coating

Definitions

  • the invention relates to a method and a device for applying a structure to a rigid substrate.
  • it may be useful not to perform a job on the surface of a rigid substrate over the entire surface with a constant layer thickness, but in a structured form, for example, to achieve defined optical or bionic effects.
  • US 6,001,515 A describes a method and an apparatus for producing color filters for LCD displays.
  • a transfer layer is formed on a roll, and a height pattern corresponding to the desired matrix pattern is formed in the transfer layer by embossing.
  • a plurality of color ink patterns are formed within locations defined by the height pattern to form a multicolor image which is then applied to a substrate.
  • the multicolor image is applied to the substrate in a deformable state and cured during that time. However, this creates an inseparable connection with the matrix pattern.
  • DE 10 2005 017 170 Ai describes a transfer film comprising a carrier film and a structural layer arranged on the carrier film and removable from the carrier film.
  • the carrier film has a master relief structure on its side facing the structure layer.
  • a transparent structural layer is applied over the entire surface as a lacquer and cured after application.
  • the replicated carrier film acts as a mold for the impression of the relief structure.
  • the applied paint can be cured by drying, by thermal radiation or by contact with a heated body, for example. A rotating roller.
  • an adhesive layer is applied to the surface thereof, the structure layer is fixed and the support film is removed after application, so that the relief structure now forms the upper side facing away from the support body.
  • Dependent claims relate to advantageous embodiments of the invention.
  • the substrate to be treated by the method and apparatus of the present invention is a rigid body having an exposed surface upon which the structure is to be applied. Since the structure according to the invention is applied to the surface of the substrate as a structural layer formed from a structural coating, for example a structural paint, the choice of the substrate material is not limited as long as the surface allows adhesion of the structural coating. However, a smooth surface is preferred, for example, a glass or plastic disk can serve as a substrate.
  • the substrate preferably has a flat shape, i. H. its longitudinal dimension is significantly larger (eg more than 10 times) than its thickness.
  • a flexible carrier film is used on which initially a template structure is formed and on which a curable structure coating is applied.
  • the carrier film with the structure coating is subsequently brought into contact with the substrate.
  • the carrier film is flexible and preferably at least as zugstabil that it can be transported by deflection rollers or rollers in the manner of belt conveyor.
  • the carrier film is preferably rollable. It alone serves as a carrier during the manufacturing process and does not become part of the finished product, ie the structure formed, since it is separated from there after application of the structural layer to the substrate.
  • materials for the carrier film are in particular plastic films in question, for example. Of polyethylene terephthalate (PET) or polycarbonate (PC).
  • the carrier film may, for example, have a thickness of 25 ⁇ m to 250 ⁇ m.
  • the width of the carrier film determines the maximum width of the structure on the substrate, although wider structures can be formed from a plurality of strips formed next to each other.
  • the width of the carrier film may, for example, 10 cm to 200 cm, preferably 50 cm to 200 cm.
  • a template structure is produced on the flexible carrier film by rolling against a roller with a structured surface, ie. H. by molding the structured surface, for example by embossing.
  • the roller has an outer surface structure which corresponds to the later applied to the substrate structure. If the roller rolls off relative to the flexible carrier film, then the structure is molded there, for example by embossing into the material of the carrier film itself or into a master structure coating previously applied there.
  • a material is then added to the template structure thus formed as a structural coating, which later serves to form the structural layer on the surface of the substrate.
  • the structural coating is curable, but is first applied to the template structure in unhardened form.
  • a structural coating for example, a curable lacquer can be used.
  • the structure coating can be formed by any curable substance which is flowable for application, that is to say, for example, a liquid or pasty substance which is conformable to the consistency, ie suitable for shaping a presentation structure.
  • Preferred examples of paints include UV-curable paints as well as sol-gel based coatings.
  • Another preferred example is a coating of inorganic-organic hybrid polymers, also referred to as Ormocere.
  • the uncured structural coating is in contact with the substrate surface on one side and is in further contact with the template structure on the other side.
  • the structural coating is cured, for example chemically by applying a chemical hardener or physically, for example by heat or radiation, for example UV radiation or electron radiation.
  • the curing does not necessarily have to cause a complete curing, but it is also a pre-curing possible, wherein the curing takes place in a subsequent step.
  • the structure layer is formed by hardening the structure coating directly in contact with the surface of the substrate so that it adheres there.
  • the carrier film is subsequently separated, the structure layer remaining on the substrate. This can be done, for example, by simply lifting the carrier film.
  • the method according to the invention and the device according to the invention are suitable for applying very different structures, of which only one master each in the form of a roller with a structured surface has to be present.
  • a flexible carrier film and large-area substrates can be coated, in particular, the length of the substrates is not limited in principle.
  • the flexible carrier foil enables a simple manufacturing process and good contact with different substrate surfaces.
  • a structure is generally understood to mean a pattern or profile of variable height, i. H. the structure surface has depressions and elevations.
  • a structure height is to be defined as a height difference between the top of a survey and the valley of a depression.
  • a structure width can be defined as the extent of a survey transverse to the depth direction.
  • the structures considered here can have, for example, average structure widths in the micrometer range ( ⁇ 1 mm, preferably ⁇ 200 ⁇ m) and even in the nanometer range ( ⁇ 1 ⁇ m, preferably ⁇ 800 nm).
  • the structure height can also be chosen flexibly over a wide range depending on the desired application and, for example, be 50 nm to 500 ⁇ m, preferably 200 nm to 200 ⁇ m. In particular, very low structural heights of less than 2 ⁇ m, more preferably even less than 200 nm are possible.
  • the layer thickness of the structural coating may be greater than the structural height of the Template structure, so that the structure coating also forms a closed layer over the elevations of the template structure. According to a development of the invention, however, it may also be preferred if the structure coating is applied in a layer thickness which corresponds at most to the structural height of the template structure or even lies below it. Thus, it can be achieved that not the entire surface of the master structure is covered with the structural coating and the later-formed structural layer covers the surface of the substrate only intermittently.
  • the structure layer formed in this way can have structural elements which extend to the substrate without a residual layer thickness, so that structure regions remain free on the substrate.
  • Such an intermittent structure can also be used as a mask for subsequent processes, for example for structuring a metal layer to be later applied to the substrate or for an etching process into the substrate.
  • Such an intermittent structure is achieved by suitably adjusting the thickness of the structural coating to be equal to or slightly less than the structural height of the template structure.
  • the applied structure coating is then in the structural recesses of the template structure.
  • it may be favorable to suitably adjust the properties of the wetting of the material of the master structure by the structural coating, for example by means of a silicone additive in the master texture lacquer and / or by a silane coating on the surface of the master structure.
  • the carrier film can be transparent to radiation, so that the hardening of the structure coating, for example of a structured paint, can take place by means of radiation through the carrier film.
  • radiation in particular UV radiation
  • the carrier film allows a particularly simple and effective application.
  • large-area substrates can be particularly easily provided with the desired structure by the investment of the carrier film to the substrate in a further transport of the carrier film and synchronous transport of the substrate takes place.
  • a continuous process is enabled in which substrates can be continuously transported through a deposition line and thereby provided with the structure.
  • At least two rollers are preferably provided on the application path, which can be arranged, for example, at a distance from each other.
  • the carrier film can be transported rolling over the rollers.
  • a transport device for the substrate may, for example, comprise rollers and / or one or more conveyor belts.
  • the carrier film is tensioned by tension, so that it has a straight course between the rollers of the application path, so that a good contact with the substrate surface is made possible.
  • the template structure on the carrier film can, as already explained, in principle be produced by embossing the structured surface of the roller into the material of the carrier film, for example by using a pressure roller and / or by supplying heat in order to achieve a permanent deformation.
  • the template structure is formed in a master pattern lacquer.
  • the master structure lacquer can be applied to the carrier film, so that the structured surface of the roller is molded in the master pattern lacquer.
  • the master pattern lacquer is curable, preferably by radiation, particularly preferably by UV radiation, and is first applied uncured to the carrier foil and then cured on or after the production of the template structure on the roll.
  • a particularly favorable formation of the template structure is made possible when the master pattern lacquer is hardened during rolling of the roller in contact with the structured surface, so that it is molded.
  • the structural coating for example textured lacquer, which later forms the structural layer on the substrate, is preferably applied to the master structural lacquer.
  • the master pattern lacquer is later preferably separated from the structural layer on the substrate together with the carrier foil.
  • the adhesion of the structure coating is less than the adhesion of the structure coating to the substrate, so that the structure coating separates from the carrier foil and the master structure lacquer and remains on the substrate .
  • the adhesion of the structure coating is less than the adhesion of the structure coating to the substrate, so that the structure coating separates from the carrier foil and the master structure lacquer and remains on the substrate .
  • This can be achieved, for example, by the selection of a suitable material combination of structure coating and master pattern lacquer.
  • a silicone additive By a non-stick coating on the template structure, for example a silane compound, it can be achieved that the structure coating remains on the substrate when the template structure is removed.
  • the substrate is completely brought to the edge in contact with the carrier film and the structural coating thereon.
  • the system takes place on at least one edge, preferably overlapping on all edges, i. that the carrier film protrudes beyond the edge of the substrate.
  • the carrier film may preferably be as wide as the substrate or, more preferably, slightly wider, so that complete coverage at both side edges can be achieved. By the complete or overlapping plant to the edge, a corresponding coverage of the substrate can be reached to the edge.
  • a full-surface and homogeneous coverage of the substrate with the structure can be achieved to the edge. It is also possible to arrange several substrates next to each other and at the same time to provide them with a structure, in which case the substrates are likewise cut out by controlled demolition at the edge. Thus, a homogeneous coating can be reached even with non-straight edge progressions to the edge.
  • the carrier film or the structural coating thereon does not completely cover the facing surface of the substrate.
  • this smaller carrier film can then be completely provided with the structure coating up to its edge.
  • the carrier film can then also be placed over the entire surface of the substrate, but it comes only in the subregion to a transfer of the structure coating.
  • a flat substrate having two opposite surfaces can first be provided with a structure from one side. If desired, the other side of the substrate can subsequently also be provided with the structure, for example by reversing the substrate and passing it once more through the device. According to a development of the invention, however, a structure can also be produced simultaneously on both sides of the surfaces of the substrate. While the carrier foil is brought into contact with a first surface of the substrate as described, a second carrier foil having a template structure and a curable structural coating may be placed thereon on a second, opposite surface of the substrate so as to form a bilateral structure in one step can be.
  • Fig. I is a schematic side view of a first embodiment of a
  • FIG. 2 is a schematic longitudinal sectional view of a unit for applying a master pattern paint as part of the apparatus according to FIG.
  • FIG. 3 shows a schematic longitudinal sectional view of a device for producing a template structure on the flexible carrier film as part of the device according to FIG. 1;
  • Fig. 4 is a schematic longitudinal sectional view of a device for
  • Fig. 5 is a schematic longitudinal sectional view of a device for
  • Fig. 6 is a schematic side view of a first embodiment of a Device for applying a bilateral structure on a substrate
  • 7a, 7b, 8a, 8b are schematic sectional views of a substrate having a structure applied thereto.
  • FIGS. 1-8b are to be understood as schematic representations intended to illustrate the basic structure of a corresponding device and the sequence of a corresponding method.
  • the representations in particular with regard to the layer thicknesses, structure heights and feature widths shown, are not true to scale.
  • FIG. 1 schematically shows the structure of a system 10 for applying a surface structure 12 to a flat, rigid substrate 14, in particular a plate-shaped substrate, for example a flat glass pane.
  • a flexible carrier film 16 is unrolled from a supply spool 18, deflected by a plurality of rollers 20-30 and continuously transported and subsequently rolled up again on a take-up spool 32.
  • the flexible carrier film is, for example, a PET film having a thickness of 125 ⁇ m.
  • the width of the carrier film 16 is, for example, 100 cm.
  • a first paint application path 34 is first formed, which is shown in more detail in FIG.
  • the carrier film 16 between two guide rollers 20, 22 just stretched.
  • a slot nozzle 36 which is shown only schematically here, a continuous layer 40 of a master structural paint is applied to the surface of the carrier film 16.
  • the patterned structural paint is, for example, an oligomer-based paint which crosslinks by means of photoinitiators.
  • the material of the master structure lacquer contains as release agent, for example, a silicone additive or is provided with a silane coating (not shown).
  • the master pattern lacquer is applied over the entire width of the carrier film 16 or in a smaller width as a continuous layer with a uniform layer thickness.
  • the layer thickness is based on the dimensions of the structure to be formed. For example, in the case of a structure for directing light on a transparent substrate or for light decoupling from a light guide substrate, the layer thickness, corresponding to the later structure height, 10 ⁇ - 50 ⁇ amount. In the case of a nanostructure for anti-reflection of the surface of the substrate, the layer thickness can be, for example, 0.5 ⁇ m - 3 ⁇ m. Subsequently, as shown in FIG. 1, the carrier film 16 is guided around an embossing roller 24 by two deflecting rollers 22, 26, so that the surface of the carrier film 16 provided with the layer 40 of the master structure film is applied to the embossing roller 24.
  • the embossing roller 24 has a structured surface 38.
  • This is a master for the structure 12 to be applied to the substrate 14.
  • the structured surface 38 may have a structure for directing light or extracting light having a structure width of 50 ⁇ m and a structure height of 5 ⁇ m, or a nanostructure for antireflection of surfaces having a structure width of 1 ⁇ m and a structure height of 350 nm.
  • the structured surface 38 of the embossing roll 24 is formed into the initially uncured lacquer layer 40 of the master structure lacquer.
  • the master pattern lacquer of the layer 40 is cured in contact with the structured surface 38 of the embossing roll 24, so that a master pattern layer 44 is formed on the carrier foil 16.
  • a second paint application path 46 is formed between two guide rollers 26, 28, a second paint application path 46 is formed.
  • a slot nozzle 48 shown only schematically, a layer 50 of a textured paint layer 44 applied to the template structure on the carrier sheet 16.
  • the textured paint 50 is UV-curable and is applied initially uncured.
  • the layer 50 of the patterned lacquer shapes the template structure layer 44.
  • the structure lacquer is, for example, an oligomer base lacquer which is radiation-crosslinking by means of photoinitiators or a lacquer based on sol-gel or an inorganic-organic hybrid polymer.
  • the textured paint is applied as a continuous layer over the entire width of the template structure layer 44 on the carrier film 16.
  • the layer thickness corresponds to the structure dimensions to be formed.
  • the structured lacquer 50 may have a layer thickness of ⁇ -5 ⁇ be applied.
  • the layer thickness can be 0.5 ⁇ m - 3 ⁇ m.
  • the layer thickness will have to be selected to be of a similar order of magnitude as the layer thickness of the master structural layer 44.
  • Two structural pulleys 28, 30 form a structural application path 52 for applying the structural lacquer 50 to the surface of the substrate 14.
  • the substrate 14 is moved by transport devices 54 in synchronism with the transport of the carrier film 16 in the longitudinal direction L.
  • the carrier film 16 is pressed onto the surface of the substrate 14, so that the layer 50 of the patterning material applied thereto comes into direct contact with the surface of the substrate 14.
  • FIG. 5 shows in more detail how on the surface of the substrate 14 the layer 50 of initially unhardened structure lacquer is arranged together with the template structure layer 44.
  • the structure lacquer is cured with a UV light source 56, so that the desired structure 12 is produced in contact with the surface of the substrate 14.
  • the carrier film 16 is peeled off from the surface of the substrate 14.
  • the template structure 44 remains on the carrier film 16, so that only the desired structure 12 remains on the substrate 14.
  • the adhesion of the hardened structure paint 50 on the substrate 14 is greater than the adhesion between the structure paint 50 and the template structure layer 44. This is favored by the silicone additive contained in the material of the template structure layer 44 as a release agent or by a non-stick coating (not shown).
  • a full-surface and homogeneous to the edge of the structure 12 is carried on the surface of the substrate 14th
  • the contour of the substrate 14 is quasi cut out of the closed layer of the textured paint 50 on the carrier film 16, whereby a controlled demolition takes place at the edge. Outside the contour of the substrate 14 the textured paint 50 adheres to the carrier film.
  • the structure 12 can be applied continuously to the surface of the rigid substrate 14.
  • very large substrate surfaces can be provided with a structure 12.
  • FIGS. 7a, 8a and 7b, 8b schematically show two examples of achievable structures 12 on the substrate 14.
  • the layer thickness of the structure lacquer 50 is greater than the layer thickness of the template structural layer 44 such that the structure 12 formed on the substrate 14 has increased structural elements, but always a residual layer thickness remains therebetween.
  • the layer thickness of the patterning material 50 is equal to the layer thickness of the template structure layer 44, so that the structure 12 formed on the substrate 14 has increased structural elements between which no residual layer thickness remains.
  • the structure 12 thus formed is intermittent and does not completely cover the surface of the substrate 14.
  • the substrate 14 is transported by transport devices 54 in the longitudinal direction L through the application lines 52, 60 of two mirror-image identical systems 10, 62.
  • the two systems 10, 62 are constructed as above and bring on the two sides of the substrate 14 structures 12, 58 on.
  • the dimensions mentioned are only to be understood as examples, so that, for example, considerably different structural widths and structural heights can be used as well as other dimensions of the carrier foil 16 and the layer thicknesses.
  • the materials mentioned are to be understood as examples.
  • glass substrates other substrate materials can be provided with a structure.
  • suitable materials can be used for the paints or coating materials as well as for the film.
  • a UV-curable structured paint 50 it is also possible, as already explained, to use a sol-gel-based paint, so that the structure 12 formed on the substrate 14 can be formed as an inorganic layer.
  • the sol-gel coating can be thermally cured on the application path 52, for example. In order to reduce the thermal load on the carrier film 16, thermal pre-curing may initially take place on the application path 52, which permits removal from the mold when the template structure layer 44 is removed, while complete curing takes place in a subsequent process.
  • the devices described for applying paint to the carrier film 16 may preferably be formed as slot nozzles, which preferably extend over the entire width of the carrier film 16.
  • the arrangement of the slot nozzles 36, 48 on the application lines 34, 46 can be horizontal, vertical or at any angle;
  • the arrangement shown in FIG. 1 with application of the master structural paint 40 in a horizontal arrangement and of the structural paint 50 in a vertical arrangement is to be understood as an example only.
  • the slot nozzles 36, 48 may be arranged during application at a certain distance from the carrier film 16 or be in contact with the surface thereof. It is also possible to press the carrier film 16 against the slot nozzles 36, 36 with a certain contact pressure.
  • a certain contact pressure For example. can be provided on the opposite side of the slit nozzles 36, 48 for this purpose a pressure roller.
  • roller application can also be used.
  • the hardening of the structural layer 50 may alternatively take place through the substrate 14, as illustrated by the hardening through the carrier foil 16. It is possible that the carrier film 16 is pressed against the substrate 14 during the curing with a contact force.
  • a pressure roller can be provided.
  • the pressure roller can also be designed to be transparent so that the curing radiation can act on the structure layer 50 through the transparent pressure roller.
  • Systems for applying coatings to substrates may comprise, in addition to the modules described above and illustrated in the drawings, additional additional modules, for example modules for maintaining the web tension and / or correcting the web tension Web guide, or for cleaning or surface activation.
  • the substrates 14 may be, in particular for optical applications, transparent substrates, for example glass panes or panes of transparent plastic.

Abstract

L'invention concerne un dispositif et un procédé pour l'application d'une structure (12) sur un substrat rigide (14). Une structure modèle (44) est produite sur un film flexible de support (6) par roulement contre un rouleau (24) muni d'une surface structurée (38). Un revêtement de structure (50) durcissable est déposé sur la structure modèle (44). Le film de support (16) muni du revêtement de structure (50) est placé contre le substrat (14) de telle sorte que le revêtement de structure (50) non durci entre en contact avec le substrat (14). Le revêtement de structure (50) est durci en contact avec le substrat (14) de manière à former une couche de structure (12) que moule la structure modèle (44). Le film de support (16) est séparé de manière à ce que la couche de structure (12) reste sur le substrat (14).
PCT/EP2016/069856 2015-08-25 2016-08-23 Procédé et dispositif d'application d'une structure sur un substrat rigide WO2017032760A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015114097.7A DE102015114097A1 (de) 2015-08-25 2015-08-25 Aufbringen einer Struktur auf ein starres Substrat
DE102015114097.7 2015-08-25

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WO2017032760A1 true WO2017032760A1 (fr) 2017-03-02

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WO2023202747A1 (fr) * 2022-04-22 2023-10-26 polyscale GmbH & Co. KG Méthode de fabrication d'une structure fonctionnelle sur une surface d'un corps fonctionnel

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