Patent ID: 8445328

Claim:
A method for producing chip elements provided with a groove, comprising the following steps: on an interconnect substrate, providing a conductive track arranged to connect a contact area of an active surface of a chip to an area corresponding to a first wall of the groove; depositing a continuous conductive bottom enhancing electro-deposition, covering the substrate and conductive track; growing micro-inserts by electrodeposition on the continuous bottom at a level of the conductive track in correspondence with the contact area of the active surface of the chip; growing a contact bump by electrodeposition on the conductive track at a level of the area corresponding to the first wall of the groove; removing the excess continuous bottom; assembling the chip on the substrate via the active surface of the chip so that the contact area of the chip presses on the micro-inserts and so that a side wall of the chip forms a bottom of the groove; machining the chip via a rear surface of the chip in parallel to the substrate while measuring a distance between the rear surface of the chip and the contact bump; stopping machining when the measured distance reaches a required value; and assembling the groove by bonding a plate to the rear surface of the chip so as to form a second wall of the groove.