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Oficina francesa de transferencia de tecnología ofrece un revestimiento antirreflectante para aplicaciones en óptica y microelectrónica


Oferta Tecnológica
Una oficina francesa de transferencia de tecnología representa a un laboratorio público de la región parisina que ha desarrollado una nueva tecnología para preparar revestimientos antirreflectantes de capa delgada destinados a aplicaciones ópticas y microelectrónicas. El nuevo proceso de revestimiento consiste en sumergir el sustrato en líquido (sol-gel). La novedad radica en separar la solución de la atmósfera que rodea al sustrato para poder medir mejor los mecanismos de evaporación, condensación y tratamiento térmico. Este método es útil en las industrias de óptica y microelectrónica para desarrollar superficies hidrofóbicas, con limpieza automática y antiabrasivas que aportan un valor añadido a productos técnicos como parabrisas, tabletas, etc. Se buscan socios con el fin de establecer acuerdos de cooperación técnica, licencia o investigación.


French Technology Transfer Office proposes a new anti-reflection coating for optical and microelectronics applications
The French TTO (Technology Transfer Office) is acting on behalf of an established public laboratory of the Paris region that has developed new technology to prepare a thin film anti-reflection coating for optics and microelectronics applications. The efficiency of the process has been demonstrated. The French public research centre is looking for partners for a technical cooperation, license or a research cooperation agreement.
The French TTO (Technology Transfer Office) is acting on behalf of an established public laboratory of the leading French scientific community based in the Paris region.

The laboratory has developed a new coating process for thin film by soaking the substrate in liquid (this approach is called ´sol-gel´ method)
The innovation consists in separating the solution of the atmosphere surrounding the substrate, so to allow the mechanisms of evaporation, condensation and heat treatment to be better measured. Using such a device allows to obtain a precision (as well as a sharpness) for the thickness of the cover as well as for the specific properties (permeability, adhesion,...).
This method (by polymerization without any resort to potential fusion) is useful for the optics industry and microelectronics industry to develop hydrophobic, self-cleaning treatment,anti-abrasive surfaces which bring added value to technical products such as: windscreen, tablets,...

The lenses used in the cameras and other optical instruments are in general covered with a thin transparent film, of a Magnesium Fluoride (MgF2) for example, which serves to reduce or eliminate unwanted reflexions. These anti-reflection coatings also allow the increasing of light transmission by the lenses.
This approach is also suitable for micro-electronic devices which need to be protected from the light as well.

The technology allows to prepare this kind of material with the MgF2 optical thin films and to lower even further their refractive index with an adjustment of the thermal conditions. It is based on a special process called "sol-gel process".

The resulting thin films combine good mechanical properties with high chemical and thermal resistance.
MgF2 coatings are interesting materials for optical applications due to the poor polarizability of the MgF bond. It shows particularly low refractive index and dielectric properties. In addition, it is insensitive to water and stable up to 700°C. The sol-gel process has strong potential for the development of thin films.

This technology could be useful for:
- microelectronics field for the formation of low dielectric constant layers or insulating layer,
-optics field for the development of low optical density layers.

The French TTO is able to provide technical and legal assistance to facilitate the eventual partnership. In case of business potential, the prototype can be partially funded by the TTO.

The partner sought could be a university or a company interested in :
- a license agreement as the TTO is ready to negociate directly the patents rights for specific applications, or
- a research cooperation agreement considering the still relatively low Technology Readiness Level (TRL) of the actual device for some applications, or
- a technical cooperation agreement if the industrial application can benefit directly from the actual device.
Advantages and Innovations:
The main advantages of this sol-gel method compared to the others methods (using vacuum for coating) are less energy-consuming, simplicity, speed, simultaneous coating of both sides and the possibility of forming multilayered structures.
Other competitive advantages could be listed such as:
- refractive index between 1,08 and 1,25
- good air stability
- mechanical strength between 20-50 MPa
- temperature resistance: up to 600°C
Stage of Development:
Under development/lab tested
Patents granted
CommeR Statunts Regarding IPR Status:
The technology is patented since 2005 in USA, United-Kingdom, France and Germany.

Partner sought

Type and Role of Partner Sought:
The partner sought could be a university or a company interested in a license agreement or a research cooperation agreement or a technical cooperation agreement. The industrial partner should be interested in the chemical formulation to improve the adhesion of glass. The industrial partner should invest (or have already invested) in the sol-gel process.
Technical cooperations could be launched for scientific tests.


Type and Size of Client:
Industry SME 11-49
Already Engaged in Trans-National Cooperation:
Languages Spoken:


Technology Keywords:
02007022 Conductive materials
09005 Materiales de referencia
02007012 Materiales ópticos
05005 Micro y nanotecnología