Electronic IC device comprising integrated optical and electronic circuit component and fabrication method

A method for manufacturing an electronic integrated circuit (IC) device, comprising:

• fabricating a first circuit structure comprising, in succession, between an outer face and a mounting face:
• a substrate layer provided on the side of the mounting face with light-sensitive optical circuit components and a dielectric layer;
• fabricating, separately from the first circuit structure, a part of a second circuit structure comprising, in succession, between a mounting face and a front face:
• a first dielectric layer including an intermediate electrically-conductive layer, and a local substrate layer;
• assembling the first circuit structure and said part of the second circuit structure by attaching the mounting face of the first circuit structure and the mounting face of the second circuit structure;
• producing through-openings which extend through the local substrate layer of the second circuit structure;
• producing a second dielectric layer above the local substrate layer of the second circuit structure, wherein the second dielectric layer fills said through-openings;
• producing holes extending through the first and second dielectric layers and which pass through said through-openings in the local substrate layer of the second circuit structure and at a distance from edges of the through-openings, and also pass through the intermediate electrically-conductive layer and further pass through the dielectric layer of the first circuit structure, said holes extending to reach electrical contacts of the light-sensitive optical circuit components of the first circuit structure;
• transforming portions of the intermediate electrically-conductive layer, located adjacent to the holes, to produce electrical insulation rings surrounding the holes;
• and
• filling said holes with an electrically-conductive material so as to form electrical connections linked to the electrical contacts of the light-sensitive optical circuit components of the first circuit structure.