Patent ID: 9628918
Date: 2017-04-18
CPC Classifications: B81B,B81C,H01L,H04R

Claim:
1. A semiconductor device comprising: a microphone module implemented on a first semiconductor die, wherein the microphone module comprises a moveable microphone element arranged at a main side of the first semiconductor die; a signal processing module implemented on a second, different semiconductor die, wherein the second semiconductor die is mounted to the main side of the first semiconductor die; a lead frame mounted to a back side of the first semiconductor die, the lead frame comprising a hole to access the microphone module, wherein the hole extends through the lead frame and is arranged opposite to the moveable microphone element; and a circuit board mounted to the lead frame, wherein a gap between the lead frame and the circuit board is sealed around the hole of the lead frame with exception of an opening located in a preferred sensitivity direction in the gap between the lead frame and the circuit board.