Patent ID: 8591125

Claim:
A die circuit assembly comprising: a block having a first major surface and a second major surface opposite the first major surface, the block further has a first axis longitudinal to the block and a second axis perpendicular to the first axis; a plurality of alignment holes that extend through the block from the first major surface to the second major surface and are aligned along the first axis, the alignment holes are disposed on opposite sides of the second axis; a fiber optic transmitter die and a fiber optic receiver die disposed directly on the first major surface and aligned along the first axis, the fiber optic transmitter die and the fiber optic receiver die being separated from each other and disposed on opposite sides of the second axis, each of the dies having a first surface attached to the first major surface of the block and an exposed surface opposite the first surface, the first surface directly faces the first major surface of the block, the exposed surface faces away from the first major surface and is positioned further away from the first major surface than the first surface; and a plurality of stand-offs disposed directly on the first major surface, the stand-offs not overlapping the dies.