Patent ID: 8003433
Filing Date: 2011-08-23
Classification: H01L

Abstract:
1. A process for fabricating an electronic component comprising an image sensor on a thinned substrate and an associated integrated circuit, said process comprising the following operations: producing the image sensor from the front side of a first substrate made of semiconductor material, the sensor comprising first conducting areas arranged for establishing electrical contacts with corresponding second conducting areas of the associated integrated circuit; producing the associated integrated circuit, with the second conducting areas of the associated integrated circuit, on the front side of a second substrate, the second conducting areas of the second substrate being arranged not being covered by other conducting layers of the first or of the second substrate when the first and second substrates are superposed; bonding the first and second substrates together front side to front side after formation of the image sensor and the associated integrated circuit; thinning the first substrate down to a thickness of about 2 to 30 microns after the bonding of the first and second substrates; etching the semiconductor material of the thinned first substrate to form one or more openings, the one or more openings being over at least a portion of the first conducting areas and the second conducting areas; removing at least a portion of insulating layers over the first conducting areas and the second conducting areas to at least partially expose the first conducting areas and the second conducting areas after the removal of the semiconductor material of the thinned first substrate; depositing a conducting layer that comes into contact with the exposed portions of the first and second conducting areas; and etching the conducting layer so as to define individual electrical connections between each of the first conducting areas of the image sensor and corresponding one or more of the second conducting areas of the associated integrated circuit.