Semiconductor device with high density optical chips and manufacturing method thereof

A semiconductor device comprising:

• a first chip module;
• a second chip module;
• and
• a bonding layer configured to bond vertically the first chip module and the second chip module,
• wherein the first chip module includes a plurality of optical chips, the optical chips are bonded within a substantially same plane, the optical chips are bonded by a first resin layer interposed therebetween, each of the optical chips including an optical element,
• the second chip module includes a plurality of control semiconductor chips and a plurality of connecting chips, the control semiconductor chips control the optical chips, the connecting chips include conductive materials piercing through the connecting chips, the control semiconductor chips and the connecting chips being bonded within a substantially same plane, the control semiconductor chips and the connecting chips are bonded by a second resin layer interposed therebetween, the second resin layer is different from the first resin,
• the optical chips and the control semiconductor chips are electrically connected through the connecting chips, and no chips or no conductive elements other than the optical chips are located in the first resin between the optical chips.