Patent ID: 7229219

Claim:
An optical apparatus comprising: a main substrate having a top surface; an attachment area located on the top surface of the main substrate and for receiving an opto-electric component; a first waveguide, the first waveguide being disposed over the top surface of the main substrate and having a first end and a second end, the first waveguide further having a lower cladding layer disposed over the top surface and a core layer disposed over the lower cladding layer, the first end of the first waveguide being disposed adjacent to a side of the attachment area; an electrically insulating layer formed over the attachment area; a plurality of conductive pads disposed on the insulating layer and located over the attachment area, the conductive pads having a thickness; and a plurality of spacers disposed on the insulating layer and located over the attachment area, each spacer having a thickness that is greater than the thickness of the conductive pads, each spacer being separately located from each conductive pad.