Device comprising a fluid channel provided with at least one micro or nanoelectronic system and method for carrying out such a device

A device comprising:

• a substrate comprising at least one microelectronic and/or nanoelectronic structure comprising at least one suspended portion,
• a cover,
• a fluid channel defined between said substrate and the cover, said fluid channel comprising two lateral walls and an upper wall connecting the two lateral walls formed by said cover and a lower wall formed by said substrate and at least two openings in order to provide a circulation in said channel, said microelectronic and/or nanoelectronic structure being located inside the fluid channel,
• an intermediate layer comprising a face in contact with base faces of said lateral walls, said face of the intermediate layer having an aptitude for sealing with the base faces,
• at least one electrical connection line extending between said microelectronic and/or nanoelectronic structure and the outside of the fluid channel, said connection line being carried out on the substrate and passing under one of the lateral walls, said at least one electrical connection line being at least partially covered by said intermediate layer at least immediately above the base face of said lateral wall, said lateral walls being sealingly fixed on said substrate by a sealing mechanism on said intermediate layer.