Microsystem device and methods for fabricating the same
First Claim
1. A microsystem, comprising:
- a package base layer formed from a first substrate of an electrical insulating material, the package base layer having;
a base inner surface defining a base cavity; and
a base external surface opposed to the base inner surface, and in direct communication with an environment;
a cap layer formed from a second substrate of the electrical insulating material or of an other electrical insulating material, the cap layer having;
a cap inner surface defining a cap cavity; and
a cap external surface opposed to the cap inner surface, and in direct communication with the environment; and
a plurality of microelectromechanical (MEMS) device layers, each of the MEMS device layers in the plurality of MEMS device layers having a respective device layer substrate disposed between the package base layer and the cap layer, wherein respective adjacent portions of the package base layer, the cap layer and the respective device layer substrates are bonded to define an enclosed space between the package base layer and the cap layer, the enclosed space at least partially including the base cavity or the cap cavity;
wherein a space between the cap cavity and the base cavity defines an operative portion of each of the MEMS device layers in the plurality of MEMS device layers;
wherein at least an operative portion of a respective MEMS device on or in each of the MEMS device layers in the plurality of MEMS device layers is disposed in the enclosed space;
wherein each of the MEMS device layers in the plurality of MEMS device layers is formed from a respective substrate of the electrical insulating material or of the other electrical insulating material;
wherein at least one of the MEMS device layers in the plurality of MEMS device layers is formed from the respective substrate of the electrical insulating material and an other of the MEMS device layers in the plurality of MEMS device layers is formed from the respective substrate of the other electrical insulating material; and
wherein the electrical insulating material and the other electrical insulating material are each independently chosen from fused silica, fused quartz, glass, ceramic, zero expansion glass-ceramic, mica, alumina, sapphire, and quartz.
1 Assignment
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Accused Products
Abstract
A microsystem includes a base layer formed from an electrical insulating material. The base layer has an inner surface defining a cavity and an external surface opposed to the inner surface, and in direct communication with an environment. A cap layer and a microelectromechanical (MEMS) device layer are formed from electrical insulating material or an other electrical insulating material. The cap has an inner surface defining a cavity, and an external surface opposed to the inner surface, and in direct communication with the environment. A MEMS device on/in the MEMS device layer is disposed between the base and the cap. Respective adjacent portions of the base, the cap and the device substrate are bonded to define an enclosed space. The enclosed space at least partially includes the base cavity or the cap cavity. At least a portion of a MEMS device on the device layer is in the enclosed space.
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Citations
31 Claims
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1. A microsystem, comprising:
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a package base layer formed from a first substrate of an electrical insulating material, the package base layer having; a base inner surface defining a base cavity; and a base external surface opposed to the base inner surface, and in direct communication with an environment; a cap layer formed from a second substrate of the electrical insulating material or of an other electrical insulating material, the cap layer having; a cap inner surface defining a cap cavity; and a cap external surface opposed to the cap inner surface, and in direct communication with the environment; and a plurality of microelectromechanical (MEMS) device layers, each of the MEMS device layers in the plurality of MEMS device layers having a respective device layer substrate disposed between the package base layer and the cap layer, wherein respective adjacent portions of the package base layer, the cap layer and the respective device layer substrates are bonded to define an enclosed space between the package base layer and the cap layer, the enclosed space at least partially including the base cavity or the cap cavity; wherein a space between the cap cavity and the base cavity defines an operative portion of each of the MEMS device layers in the plurality of MEMS device layers; wherein at least an operative portion of a respective MEMS device on or in each of the MEMS device layers in the plurality of MEMS device layers is disposed in the enclosed space; wherein each of the MEMS device layers in the plurality of MEMS device layers is formed from a respective substrate of the electrical insulating material or of the other electrical insulating material; wherein at least one of the MEMS device layers in the plurality of MEMS device layers is formed from the respective substrate of the electrical insulating material and an other of the MEMS device layers in the plurality of MEMS device layers is formed from the respective substrate of the other electrical insulating material; and wherein the electrical insulating material and the other electrical insulating material are each independently chosen from fused silica, fused quartz, glass, ceramic, zero expansion glass-ceramic, mica, alumina, sapphire, and quartz. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 29)
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27. A microsystem, comprising:
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a package base layer formed from a first substrate of an electrical insulating material, the package base layer having; a base inner surface defining a base cavity; and a base external surface opposed to the base inner surface, and in direct communication with an environment; a cap layer formed from a second substrate of the electrical insulating material or of an other electrical insulating material, the cap layer having; a cap inner surface defining a cap cavity; and a cap external surface opposed to the cap inner surface, and in direct communication with the environment; and a microelectromechanical (MEMS) device layer having a device layer substrate disposed between the package base layer and the cap layer, wherein respective adjacent portions of the package base layer, the cap layer and the device layer substrate are bonded to define an enclosed space between the package base layer and the cap layer, the enclosed space at least partially including the base cavity or the cap cavity; wherein at least an operative portion of a MEMS device on or in the MEMS device layer is disposed in the enclosed space; wherein the MEMS device layer is formed from a substrate of the electrical insulating material or of the other electrical insulating material;
wherein the electrical insulating material and the other electrical insulating material are each independently chosen from fused silica, fused quartz, glass, ceramic, zero expansion glass-ceramic, mica, alumina, sapphire, and quartz; andwherein the package base layer or the cap layer further includes at least one device chosen from sensors, actuators, mechanical isolators, thermal isolators, shock absorbers, and combinations thereof.
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30. A microsystem, comprising:
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a package base layer formed from a first substrate of an electrical insulating material, the package base layer having; a base inner surface defining a base cavity; and a base external surface opposed to the base inner surface, and in direct communication with an environment; a cap layer formed from a second substrate of the electrical insulating material or of an other electrical insulating material, the cap layer having; a cap inner surface defining a cap cavity; and a cap external surface opposed to the cap inner surface, and in direct communication with the environment; and a microelectromechanical (MEMS) device layer having a device layer substrate disposed between the package base layer and the cap layer, wherein respective adjacent portions of the package base layer, the cap layer and the device layer substrate are bonded to define an enclosed space between the package base layer and the cap layer, the enclosed space at least partially including the base cavity or the cap cavity; wherein at least an operative portion of a MEMS device on or in the MEMS device layer is disposed in the enclosed space; wherein the MEMS device layer is formed from a substrate of the electrical insulating material or of the other electrical insulating material; wherein the package base layer, the cap layer, a partition layer and the MEMS device layer are electrically isolated from each other; wherein the partition layer is formed from a third substrate of the electrical insulating material; wherein the partition layer has a first surface defining a first cavity and a second surface opposite the first surface defining a second cavity; wherein the partition layer divides the enclosed space into at least two hydraulically separated enclosed spaces; and wherein the electrical insulating material and the other electrical insulating material are each independently chosen from fused silica, fused quartz, glass, ceramic, zero expansion glass-ceramic, mica, alumina, sapphire, and quartz.
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31. A microsystem, comprising:
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a package base layer formed from a first substrate of an electrical insulating material, the package base layer having; a base inner surface defining a base cavity; and a base external surface opposed to the base inner surface, and in direct communication with an environment; a cap layer formed from a second substrate of the electrical insulating material or of an other electrical insulating material, the cap layer having; a cap inner surface defining a cap cavity; and a cap external surface opposed to the cap inner surface, and in direct communication with the environment; and a microelectromechanical (MEMS) device layer having a device layer substrate disposed between the package base layer and the cap layer, wherein respective adjacent portions of the package base layer, the cap layer and the device layer substrate are bonded to define an enclosed space between the package base layer and the cap layer, the enclosed space at least partially including the base cavity or the cap cavity; wherein a space between the cap cavity and the base cavity defines an operative portion of the MEMS device layer; wherein at least an operative portion of a MEMS device on or in the MEMS device layer is disposed in the enclosed space; wherein the MEMS device layer is formed from a substrate of the electrical insulating material or of the other electrical insulating material; wherein at least the operative portion of the MEMS device layer is mechanically connected in the enclosed space between the base cavity and the cap cavity to at least an other operative portion of the package base layer or the cap layer; and wherein the electrical insulating material and the other electrical insulating material are each independently chosen from fused silica, fused quartz, glass, ceramic, zero expansion glass-ceramic, mica, alumina, sapphire, and quartz.
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Specification