MEMS packages and methods of manufacture thereof
First Claim
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1. A method of manufacturing a microelectromechanical systems (MEMS) package, the method comprising:
- bonding a capping structure to a MEMS device to form a MEMS structure, wherein the capping structure comprises a substrate and an oxide layer, the substrate having a cavity disposed in a first surface thereof, wherein the oxide layer lines the cavity, and wherein the oxide layer is interposed between the substrate of the capping structure and the MEMS device;
attaching the MEMS structure to a device wafer comprising a plurality of first devices formed therein to form a wafer level MEMS package; and
singulating the device wafer having the MEMS structure attached thereto to form a plurality of chip scale MEMS packages.
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Abstract
Microelectromechanical systems (MEMS) packages and methods of manufacture thereof are described. In an embodiment, a method of manufacturing a MEMS package may include attaching a MEMS structure having a capping structure thereon to a device wafer comprising a plurality of first devices formed therein to form a wafer level MEMS package; and singulating the device wafer having the MEMS structure attached thereto to form a plurality of chip scale MEMS packages.
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20 Claims
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1. A method of manufacturing a microelectromechanical systems (MEMS) package, the method comprising:
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bonding a capping structure to a MEMS device to form a MEMS structure, wherein the capping structure comprises a substrate and an oxide layer, the substrate having a cavity disposed in a first surface thereof, wherein the oxide layer lines the cavity, and wherein the oxide layer is interposed between the substrate of the capping structure and the MEMS device; attaching the MEMS structure to a device wafer comprising a plurality of first devices formed therein to form a wafer level MEMS package; and singulating the device wafer having the MEMS structure attached thereto to form a plurality of chip scale MEMS packages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of manufacturing a microelectromechanical systems (MEMS) package, the method comprising:
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bonding a capping structure to a MEMS device to form a MEMS structure, the capping structure having a cavity disposed therein, the cavity disposed over a sensing feature of the MEMS device; forming standoff structures in the MEMS device of the MEMS structure, the standoff structures disposed at a surface of the MEMS structure opposite the capping structure; forming openings in a device wafer comprising a plurality of first devices, wherein the openings are formed in a dielectric layer of the device wafer, wherein the openings expose a metal layer under the dielectric layer, wherein the device wafer is separate from the MEMS structure; after forming the standoff structures and openings, aligning the standoff structures to the openings in the device wafer; after aligning the standoff structures to the openings, coupling the standoff structures of the MEMS structure to the corresponding metal layer of the openings in the device wafer via corresponding inter-wafer connectors to form a wafer level MEMS package, wherein each of the corresponding inter-wafer connectors extends into a corresponding opening and physically contacts a corresponding standoff structure and a metal layer of the corresponding opening in the device wafer; after the coupling, thinning the wafer level MEMS package to expose conductive features in the device wafer; forming a first redistribution layer (RDL) at a surface of the thinned wafer level MEMS package, the first RDL electrically coupled to the exposed conductive features; and singulating the wafer level MEMS package to form a plurality of chip scale MEMS packages. - View Dependent Claims (13, 14, 15, 16)
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17. A microelectromechanical systems (MEMS) package, comprising:
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a first device substrate comprising one or more first devices formed therein; a MEMS structure having a capping structure thereon disposed at a first major surface of the first device substrate; and a second device substrate comprising one or more second devices formed therein, the second device substrate disposed at a second major surface of the first device substrate, the second major surface opposite the first major surface, wherein the second device substrate comprises metal bumps formed at an active surface of the second device substrate, wherein the active surface of the second device faces away from the first device substrate, wherein the second device substrate is laterally encapsulated within a first molding compound wherein the first molding compound has a same lateral extent as the first device substrate, wherein the MEMS structure comprises a plurality of standoff regions at the first major surface of the first device substrate, and wherein a sealing connector couples the standoff regions to the first device substrate and provides a sealed cavity between the MEMS structure and the first device substrate. - View Dependent Claims (18, 19, 20)
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Specification