A thin-film filter includes thin-film part having a film surface and a rear film surface arranged a rear side of the film surface, a plurality of through holes being formed to penetrate the thin-film part from the film surface to the rear film surface, and stripes-formed inner wall surfaces. The stripes-formed inner wall surfaces include stripe-like parts formed along with an intersecting direction intersecting the film surface. The stripes-formed inner wall surfaces are formed inside the respective through holes.

A low-profile packaging structure for a microelectromechanical-system (MEMS) resonator system includes an electrical lead having internal and external electrical contact surfaces at respective first and second heights within a cross-sectional profile of the packaging structure and a die-mounting surface at an intermediate height between the first and second heights. A resonator-control chip is mounted to the die-mounting surface of the electrical lead such that at least a portion of the resonator-control chip is disposed between the first and second heights and wire-bonded to the internal electrical contact surface of the electrical lead. A MEMS resonator chip is mounted to the resonator-control chip in a stacked die configuration and the MEMS resonator chip, resonator-control chip and internal electrical contact and die-mounting surfaces of the electrical lead are enclosed within a package enclosure that exposes the external electrical contact surface of the electrical lead at an external surface of the packaging structure.

A method of encapsulating at least one object in a polymer shell includes (a) providing a carrier having a release surface and at least one object releasably secured thereto, each object having a heighth dimension and a width dimension; (b) providing a light polymerizable resin, the resin supported on a light transmissive window; (c) advancing each object on the carrier into the light polymerizable resin to a position spaced away from the window by a distance sufficient to maintain a dead zone or release layer of unpolymerized resin directly on the window; (d) forming a first portion of the polymer shell around each object by projecting patterned light through the window; (e) forming a subsequent portion of a polymer shell on or around each object by advancing the object on the carrier away from the window and projecting patterned light through the window; and (f) repeating step (e) until each object is encapsulated in a polymer shell.

A packaged electronic die having a micro-cavity and a method for forming a packaged electronic die. The packaged electronic die includes a photoresist frame secured to the electronic die and extending completely around the device. The photoresist frame is further secured to a first major surface of a substrate so as to form an enclosure around the device. Encapsulant material extends over the electronic die and around the sides of the electronic die. The encapsulant material is in contact with the first major surface of the substrate around the entire periphery of the electronic die so as to form a seal around the electronic die.

A MEMS microphone includes a MEMS transducer, a sealing cover, and a package substrate. The MEMS transducer includes an element substrate, a plurality of cantilevered beams, and a weight. An airtight sealing structure is formed with the sealing cover and the package substrate, which is formed by mounting the MEMS transducer on the package substrate, and adhering the sealing cover to the package substrate so as to surround the MEMS transducer.

A stacked structure includes a polymer layer and a metal layer. The metal layer is disposed on the polymer layer. A burr length on a surface of the polymer layer is about 0.8 m to about 150 m, and a burr length on a surface of the metal layer is about 0.8 m to about 7 m.

A low-profile packaging structure for a microelectromechanical-system (MEMS) resonator system includes an electrical lead having internal and external electrical contact surfaces at respective first and second heights within a cross-sectional profile of the packaging structure and a die-mounting surface at an intermediate height between the first and second heights. A resonator-control chip is mounted to the die-mounting surface of the electrical lead such that at least a portion of the resonator-control chip is disposed between the first and second heights and wire-bonded to the internal electrical contact surface of the electrical lead. A MEMS resonator chip is mounted to the resonator-control chip in a stacked die configuration and the MEMS resonator chip, resonator-control chip and internal electrical contact and die-mounting surfaces of the electrical lead are enclosed within a package enclosure that exposes the external electrical contact surface of the electrical lead at an external surface of the packaging structure.

A semiconductor device may include a first substrate, a first electrical component, a lid, a second substrate, and a second electrical component. The first substrate may include an upper surface, a lower surface, and an upper cavity in the upper surface. The first electrical component may reside in the upper cavity of the first substrate. The lid may cover the upper cavity and may include a port that permits fluid to flow between an environment external to the semiconductor device and the upper cavity. The second substrate may include the second electrical component mounted to an upper surface of the second substrate. The lower surface of the first substrate and the upper surface of the second substrate may fluidically seal the second electrical component from the upper cavity.

The present disclosure relates to a MEMS package having different trench depths, and a method of fabricating the MEMS package. In some embodiments, a cap substrate is bonded to a device substrate. The cap substrate comprises a cap substrate bonded to a device substrate. The cap substrate comprises a MEMS trench, a scribe trench, and an edge trench respectively recessed from at a front-side surface of the cap substrate. A stopper is disposed within the MEMS trench and raised from a bottom surface of the MEMS trench.

The present disclosure relates to a packaging process to enhance performance of a wafer-level package. The disclosed package includes multiple mold compounds, a multilayer redistribution structure, and a thinned die with a device layer and die bumps underneath the device layer. The multilayer redistribution structure includes package contacts at a bottom of the multilayer redistribution structure and redistribution interconnects connecting the die bumps to the package contacts. A first mold compound resides around the thinned die to encapsulate sidewalls of the thinned die, and extends beyond a top surface of the thinned die to define an opening over the thinned die. A second mold compound resides between the multilayer redistribution structure and the first mold compound to encapsulate a bottom surface of the device layer and each die bump. A third mold compound fills the opening and is in contact with the top surface of the thinned die.