Patent ID: 8153475

Claim:
A method for fabricating a plurality of optical devices comprising: providing a bulk substrate having a top surface; forming a liftoff layer on the top surface of the bulk substrate; forming at least two layers of semiconductor material on the liftoff layer, the at least two layers of semiconductor material having an upper surface; dividing the at least two layers of semiconductor material into separate die regions electrically isolated from each other by forming trenches through the at least two layers of semiconductor material and through the liftoff layer down to the bulk substrate; attaching the upper surface of the now separate die regions to a layer of adhesive material; using the liftoff layer, separating the at least two layers of semiconductor material from the bulk substrate; expanding the layer of adhesive material to move the die regions further apart from each other; by use of the layer of adhesive material, positioning the die regions on a first substrate for further processing; affixing the die regions to the first substrate; reusing the bulk substrate for a subsequent process.