Patent ID: 7977777

Claim:
A dual-lead frame mounting package for an optical semiconductor die, the dual lead frame mounting package having a top surface and a bottom surface, the dual lead frame mounting package comprising: a die-pad lead frame having a bonding area for the optical semiconductor die, the die-pad lead frame having an exposed base along the bottom surface for heat dissipation; a wire bond lead frame having at least one pad for wire bonding electrical interconnections to the optical semiconductor die; an electrically insulative frame disposed in aligned relation between the die-pad lead frame and the wire bond lead frame; and a thermoplastic molding at least partially encapsulating the die-pad lead frame, the insulative frame and the wire bond lead frame, wherein at least one of the die pad lead frame and the wire bond lead frame includes at least one mounting structure for mounting an optical structure above the top surface of the dual lead frame mounting package, and wherein the thermoplastic molding, the wire bond lead frame and the insulative frame each define an opening above the bonding area so as to form a recess that extends from the top surface to the bonding area.