MEMS electrostatic actuator device for RF varactor applications
First Claim
1. A MEMS electrostatic actuator device, comprising:
- a CMOS wafer portion having CMOS circuitry;
a MEMS wafer portion bonded to the CMOS wafer portion, the MEMS wafer portion having an array of actuator elements formed thereon and a plurality of through-silicon-vias (TSVs) extending through the MEMS wafer portion; and
a plurality of ball bonds formed on a side of the MEMS wafer portion opposite the CMOS wafer portion, wherein an RF signal ball bond of the plurality of ball bonds is electrically connected through an RF signal TSV of the plurality of TSVs and an RF signal horizontal feeder bar to a plurality of RF signal lines, wherein the plurality of RF signal lines include one RF signal line extending through each column of the array of actuator elements.
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Accused Products
Abstract
A MEMs actuator device and method of forming includes arrays of actuator elements. Each actuator element has a moveable top plate and a bottom plate. The top plate includes a central membrane member and a cantilever spring for movement of the central membrane member. The bottom plate consists of two RF signal lines extending under the central membrane member. A MEMs electrostatic actuator device includes a CMOS wafer, a MEMs wafer, and a ball bond assembly. Interconnections are made from a ball bond to an associated through-silicon-via (TSV) that extends through the MEMS wafer. A RF signal path includes a ball bond electrically connected through a TSV and to a horizontal feed bar and from the first horizontal feed bar vertically into each column of the array. A metal bond ring extends between the CMOS wafer and the MEMS wafer. An RF grounding loop is completed from a ground shield overlying the array to the metal bond ring, a TSV and to a ball bond.
18 Citations
19 Claims
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1. A MEMS electrostatic actuator device, comprising:
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a CMOS wafer portion having CMOS circuitry; a MEMS wafer portion bonded to the CMOS wafer portion, the MEMS wafer portion having an array of actuator elements formed thereon and a plurality of through-silicon-vias (TSVs) extending through the MEMS wafer portion; and a plurality of ball bonds formed on a side of the MEMS wafer portion opposite the CMOS wafer portion, wherein an RF signal ball bond of the plurality of ball bonds is electrically connected through an RF signal TSV of the plurality of TSVs and an RF signal horizontal feeder bar to a plurality of RF signal lines, wherein the plurality of RF signal lines include one RF signal line extending through each column of the array of actuator elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A MEMS device, comprising:
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a CMOS wafer portion having CMOS circuitry; a MEMS wafer portion bonded to the CMOS wafer portion, the MEMS wafer portion having an array of elements formed thereon and a plurality of through-silicon-vias (TSVs) extending through the MEMS wafer portion; and a plurality of ball bonds formed on a side of the MEMS wafer portion opposite the CMOS wafer portion, wherein an RF signal ball bond of the plurality of ball bonds is electrically connected through an RF signal TSV of the plurality of TSVs and an RF signal horizontal feeder bar to a plurality of RF signal lines, wherein the plurality of RF signal lines include one RF signal line extending through each column of the array of elements. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification