Patent ID: 9371221
Filing Date: 2016-06-21
CPC Classification: B81B,B81C,H01L

Claim Text:
1. A microelectromechanical-system (MEMS) resonator system packaging structure having a low cross-sectional profile, the packaging structure comprising: a lead frame including an electrical lead having internal and external electrical contact surfaces at respective first and second heights within the cross-sectional profile of the packaging structure, and a die-mounting surface at a third height between the first and second heights; a resonator-control chip mounted to the die-mounting surface of the electrical lead and wire-bonded to the internal electrical contact surface of the electrical lead; a MEMS resonator chip mounted to the resonator-control chip in a stacked die configuration and electrically coupled to the resonator-control chip; and a package enclosure that encloses the MEMS resonator chip, resonator-control chip and internal electrical contact and die-mounting surfaces of the electrical lead, and that exposes the external contact surface of the electrical lead at an external surface of the packaging structure.