Microelectronic packages having split gyroscope structures and methods for the fabrication thereof
First Claim
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1. A microelectronic package, comprising:
- a first Microelectromechanical Systems (MEMS) die having a first MEMS gyroscope structure and a frontside on which the first MEMS gyroscope structure is formed;
a second MEMS die having a second MEMS gyroscope structure thereon and positioned in a stacked relationship with the first MEMS die, the first and second MEMS gyroscope structures overlapping as taken along an axis orthogonal to the frontside of the first MEMS die;
a first hermetic cavity enclosing the first MEMS gyroscope structure;
a second hermetic cavity enclosing the second MEMS gyroscope structure and fluidly coupled to the first hermetic cavity;
a vent hole fluidly coupling the first and second hermetic cavities and formed through the first MEMS die;
a cap piece sealingly bonded to the first MEMS die opposite the second MEMS die; and
a MEMS accelerometer structure formed on the frontside of the first MEMS die at a location adjacent the first MEMS gyroscope structure, the MEMS accelerometer structure further overlapping with the second MEMS gyroscope structure as taken along an axis orthogonal to the frontside of the first MEMS die.
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Abstract
Methods for fabricating microelectronic packages and microelectronic packages having split gyroscope structures are provided. In one embodiment, the microelectronic package includes a first Microelectromechanical Systems (MEMS) die having a first MEMS gyroscope structure thereon. The microelectronic package further includes a second MEMS die, which has a second MEMS gyroscope structure thereon and which is positioned in a stacked relationship with the first MEMS die. The first and second MEMS gyroscope structures overlap as taken along a first axis orthogonal to a principal axis of the first MEMS die.
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Citations
19 Claims
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1. A microelectronic package, comprising:
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a first Microelectromechanical Systems (MEMS) die having a first MEMS gyroscope structure and a frontside on which the first MEMS gyroscope structure is formed; a second MEMS die having a second MEMS gyroscope structure thereon and positioned in a stacked relationship with the first MEMS die, the first and second MEMS gyroscope structures overlapping as taken along an axis orthogonal to the frontside of the first MEMS die; a first hermetic cavity enclosing the first MEMS gyroscope structure; a second hermetic cavity enclosing the second MEMS gyroscope structure and fluidly coupled to the first hermetic cavity; a vent hole fluidly coupling the first and second hermetic cavities and formed through the first MEMS die; a cap piece sealingly bonded to the first MEMS die opposite the second MEMS die; and a MEMS accelerometer structure formed on the frontside of the first MEMS die at a location adjacent the first MEMS gyroscope structure, the MEMS accelerometer structure further overlapping with the second MEMS gyroscope structure as taken along an axis orthogonal to the frontside of the first MEMS die. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A microelectronic package, comprising:
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a first Microelectromechanical Systems (MEMS) die having a first MEMS gyroscope structure and a frontside on which the first MEMS gyroscope structure is formed; a second MEMS die having a second MEMS gyroscope structure thereon and positioned in a stacked relationship with the first MEMS die, the first and second MEMS gyroscope structures overlapping as taken along an axis orthogonal to the frontside of the first MEMS die; a first hermetic cavity enclosing the first MEMS gyroscope structure; a second hermetic cavity enclosing the second MEMS gyroscope structure and fluidly coupled to the first hermetic cavity; a cap piece sealingly bonded between the first and second MEMS die; a vent hole fluidly coupling the first and second hermetic cavities and formed through the cap piece; and a MEMS accelerometer formed on the frontside of the first MEMS die at a location adjacent the first MEMS gyroscope structure, the MEMS accelerometer further overlapping with the second MEMS gyroscope structure as taken along an axis orthogonal to the frontside of the first MEMS die. - View Dependent Claims (10)
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11. A microelectronic package, comprising:
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a first Microelectromechanical Systems (MEMS) die having a first MEMS gyroscope structure and a MEMS accelerometer formed thereon; a second MEMS die having a second MEMS gyroscope structure thereon and positioned in a stacked relationship with the first MEMS die; a first hermetic cavity enclosing the first MEMS gyroscope structure and containing a first pressure; a second hermetic cavity enclosing the second MEMS gyroscope structure, fluidly coupled to the first hermetic cavity, and containing the first pressure; and a third hermetic cavity enclosing the MEMS accelerometer and containing a second pressure greater than the first pressure. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification