Patent ID: 8027553

Claim:
A connected body comprising: an optical element having first electrodes formed on one surface thereof; and a substrate having second electrodes formed on one surface thereof, the second electrodes being connected to the first electrodes of the optical element, wherein the second electrodes have recesses, and are connected to the first electrodes through joint materials, wherein the recesses are formed on the second electrodes by etching, wherein the joint materials are conductive bumps, wherein the conductive bumps include a leading end and a body, wherein a first diameter of the recess is larger than a second diameter of the leading end of the conductive bump, wherein a third diameter of the body of the conductive bump is larger than the first diameter of the recess, wherein the leading ends of the conductive bumps are inserted into the recesses of the second electrodes and have spaces in vertical directions to an insertion direction within the recesses, and wherein the bodies of the conductive bumps are contacted with the second electrodes and the conductive bumps are connected to the second electrodes.