Vent hole sealing in multiple die sensor device
First Claim
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1. A method of fabricating a sensor device, the method comprising:
- attaching first and second die to one another to define first and second cavities in which first and second sensors of the sensor device are disposed, respectively, the second die having an opening in communication with the second cavity;
obstructing the opening; and
attaching a third die to the second die;
wherein the first cavity is hermetically sealed by attaching the first and second die; and
wherein the second cavity is hermetically sealed by attaching the third die to the second die.
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Abstract
Embodiments of methods of fabricating a sensor device include attaching first and second die to one another to define first and second cavities in which first and second sensors of the sensor device are disposed, respectively. The second die has an opening in communication with the second cavity. The methods further include obstructing the opening, attaching a third die to the second die. The first cavity is hermetically sealed by attaching the first and second die. The second cavity is hermetically sealed by attaching the third die to the second die.
12 Citations
20 Claims
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1. A method of fabricating a sensor device, the method comprising:
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attaching first and second die to one another to define first and second cavities in which first and second sensors of the sensor device are disposed, respectively, the second die having an opening in communication with the second cavity; obstructing the opening; and attaching a third die to the second die; wherein the first cavity is hermetically sealed by attaching the first and second die; and wherein the second cavity is hermetically sealed by attaching the third die to the second die. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of fabricating a sensor device, the method comprising:
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attaching first and second wafers to one another to define first and second cavities in which first and second sensors of the sensor device are disposed, respectively, the second wafer having a vent hole in communication with the second cavity; depositing an obstruction on the second wafer to obstruct the opening; and attaching a die over the second cavity to hermetically seal the second cavity with the opening remaining obstructed by the obstruction. - View Dependent Claims (13, 14, 15)
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16. A sensor device comprising:
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a first die; a second die attached to the first die to define first and second cavities in which first and second sensors are disposed, respectively, the second die having an opening in communication with the second cavity; an obstruction disposed relative to the opening to obstruct the opening; and a third die attached to the second die to seal the second cavity. - View Dependent Claims (17, 18, 19, 20)
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Specification