Multi-sensor system and method of forming same
First Claim
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1. A multi-sensor system comprising:
- a first substrate;
an insulating layer on the first substrate;
a pressure sensor comprising;
a movable electrode aligned with a pressure sensor port, the movable electrode being on the insulating layer, the pressure sensor port being within the first substrate, wherein the pressure sensor port extends partially through the first substrate, a pressure sensing diaphragm portion of the first substrate and a pressure sensor diaphragm portion of the insulating layer being between the pressure sensor port and the movable electrode; and
a pressure sensor fixed electrode comprising a first portion of a second substrate; and
an inertial sensor comprising;
an inertial sensor fixed electrode on the insulating layer; and
a transducer layer comprising a second portion of the second substrate.
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Abstract
A method for forming a multi-sensor system includes forming an inertial sensor fixed electrode of an inertial sensor and a movable electrode of a pressure sensor on a first substrate having through silicon vias (TSVs). A second substrate is fusion bonded to a bonding layer on the first substrate. The second substrate and the bonding layer are patterned to form a transducer layer of the inertial sensor and a pressure sensor fixed electrode of the pressure sensor. The first substrate is etched to form a pressure sensor port aligned with the movable electrode.
24 Citations
7 Claims
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1. A multi-sensor system comprising:
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a first substrate; an insulating layer on the first substrate; a pressure sensor comprising; a movable electrode aligned with a pressure sensor port, the movable electrode being on the insulating layer, the pressure sensor port being within the first substrate, wherein the pressure sensor port extends partially through the first substrate, a pressure sensing diaphragm portion of the first substrate and a pressure sensor diaphragm portion of the insulating layer being between the pressure sensor port and the movable electrode; and a pressure sensor fixed electrode comprising a first portion of a second substrate; and an inertial sensor comprising; an inertial sensor fixed electrode on the insulating layer; and a transducer layer comprising a second portion of the second substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification