Integration of micro-electro mechanical systems and active circuitry
First Claim
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1. A single integrated wafer package comprising:
- a micro-electro mechanical system (MEMS) wafer having at least one MEMS component;
an active device wafer having an active device circuit;
a seal ring sandwiched between the MEMS wafer and the active device wafer such that a sealed chamber is formed about the MEMS component; and
an external contact to the wafer package, wherein the external contact is accessible externally to the wafer package and is electrically coupled to the active device circuit of the active device wafer.
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Abstract
A single integrated wafer package includes a micro-electro mechanical system (MEMS) wafer, an active device wafer, and a seal ring. The MEMS wafer has a first surface and includes at least one MEMS component on its first surface. The active device wafer has a first surface and includes an active device circuit on its first surface. The seal ring is adjacent the first surface of the MEMS wafer such that a seal is formed about the MEMS component. An external contact is provided on the wafer package. The external contact is accessible externally to the wafer package and is electrically coupled to the MEMS device or active device circuit of the active device wafer.
108 Citations
23 Claims
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1. A single integrated wafer package comprising:
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a micro-electro mechanical system (MEMS) wafer having at least one MEMS component;
an active device wafer having an active device circuit;
a seal ring sandwiched between the MEMS wafer and the active device wafer such that a sealed chamber is formed about the MEMS component; and
an external contact to the wafer package, wherein the external contact is accessible externally to the wafer package and is electrically coupled to the active device circuit of the active device wafer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for fabricating a wafer package comprising:
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providing an active device wafer with an interconnect that is electrically coupled to an active device circuit;
depositing a dielectric layer over the active device wafer;
etching the dielectric layer to form a raised ridge that forms a ring around a perimeter of the active device wafer; and
bonding a micro-electro mechanical system (MEMS) wafer having at least one MEMS component to the active device wafer at the wafer level, wherein the raised ridge also forms a ring around the MEMS component once bonded, such that raised ridge, MEMS wafer and active device wafer seal the MEMS component. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A single integrated wafer package comprising:
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a micro-electro mechanical system (MEMS) wafer having at least one MEMS component;
an active device wafer having an active device circuit;
sealing means between the MEMS wafer and the active device wafer for forming a seal around the MEMS component; and
an external contact to the wafer package, wherein the external contact is accessible externally to the wafer package and is electrically coupled to one of the group comprising the active device circuit of the active device wafer and the MEMS component of the MEMS wafer.
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Specification