An optical subassembly which positions an optical device is described. The optical
device is mounted on a plurality of spheres or columns placed in predetermined
positions in an upper surface of a substrate. The predetermined positions include
pits formed in the upper surface of the substrate. The spheres may be the same
size or may be of varying sizes. Pits or grooves also may be formed in the optical
device. The optical device may be formed with flexure positions to assist in holding
it in place on the spheres. Further, the optical device, spheres and substrate
may be metallized or formed of metal and the surface tension forces of solder may
be utilized to position the optical device.
