Patent ID: 6993215

Claim:
A process for producing a structure provided with at least one optical guiding means for the purpose of transmitting at least one optical or light wave, characterized in that it consists: in providing a substrate with an electrically nonconducting first layer ( 3 ) and with an electrically conducting second layer ( 4 ); in producing a wall ( 5 ) of electrical insulation in the second layer ( 4 ) at least up to the first layer, having two opposed ends ( 5 a, 5 b ) and partly surrounding a first region ( 6 ) of the second layer; and in excavating a cavity ( 9 ) in the second layer and then in said first layer, partly surrounding a second region ( 10 ) of the second layer ( 4 ), adjacent or extending said first region ( 6 ) and into which said wall ( 5 ) emerges, this cavity including a recess ( 15 ) in the second layer beneath at least part of the second region; in such a way that the closed part ( 14 ) of the second layer ( 4 ) corresponding to said regions ( 6 , 10 ) is electrically isolated from the rest of the second layer and in such a way that the part of the recess ( 15 ) exposed from underneath said second region ( 10 ) constitutes a beam ( 16 ).