Patent ID: 8492720

Claim:
A method of making a proximity sensor package, comprising: providing a lead frame, the lead frame having a top and a bottom portion, wherein a first material is attached to a first portion of the bottom portion of the lead frame; attaching a receiver die to a first portion of the top portion of the lead frame; attaching a transmitter die to a second portion of the top portion of the lead frame; attaching an ASIC die to a third portion of the top portion of the lead frame; electrically coupling the receiver die, the transmitter die and the ASIC die to the lead frame; concurrently forming a first transparent encapsulant over the receiver die, the ASIC die and a fourth portion of the top portion of the lead frame and a second transparent encapsulant over the transmitter die and a fifth portion of the top portion of the lead frame; removing the first material attached to the first portion of the bottom portion of the lead frame; attaching a second material to substantially all of the bottom portion of the lead frame; forming an opaque encapsulant over a portion of the first transparent encapsulant, a portion of the second transparent encapsulant and a sixth portion of the top portion of the lead frame.