Semiconductor device and method for manufacturing the same
First Claim
1. A semiconductor device comprising:
- a sensor including a sensor structure and a periphery element, wherein the sensor structure is disposed on a first side of the sensor, and the periphery element surrounds the sensor structure; and
a cap covering the sensor structure and having a second side, which is bonded to the first side of the sensor,wherein the cap includes a first wiring layer, which is disposed on the second side of the cap,wherein the first wiring layer steps over the periphery element,wherein the sensor further includes a sensor side connection portion, and the cap further includes a cap side connection portion,wherein the sensor side connection portion is bonded to the cap side connection portion,wherein at least one of the sensor side connection portion and the cap side connection portion provides an eutectic alloy so that the sensor side connection portion and the cap side connection portion are bonded to each other,wherein the sensor further includes a SOI substrate having a first conductive layer, an insulation layer, and a second conductive layer,wherein the first conductive layer, the insulation layer, and the second conductive layer are stacked in this order,wherein the sensor structure and the periphery element are disposed in the first conductive layer,wherein the insulation layer includes a contact portion, which is disposed between the periphery element and the second conductive layer,wherein the contact portion electrically couples the periphery element and the second conductive layer,wherein the cap further includes a conductive substrate,wherein the cap side connection portion is disposed on the conductive substrate,wherein the cap further includes a second wiring layer having a wiring portion and a sealing portion,wherein the wiring portion is electrically isolated from the sealing portion,wherein the wiring portion and the sealing portion provide the cap side connection portion,wherein the wiring portion is bonded to a part of the sensor structure via the eutectic alloy,wherein the sealing portion has a ring shape, which corresponds to the periphery element,wherein the sealing portion is bonded to the periphery element via the eutectic alloy, andwherein the periphery element, the contact portion, the second conductive layer, the sealing portion, and the conductive substrate are electrically coupled with each other so that the periphery element, the contact portion, the second conductive layer, the sealing portion, and the conductive substrate have the same electric potential.
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Accused Products
Abstract
A semiconductor device includes: a sensor including a sensor structure on a first side of the sensor and a periphery element surrounding the sensor structure; and a cap covering the sensor structure and having a second side bonded to the first side of the sensor. The cap includes a first wiring layer on the second side of the cap. The first wiring layer steps over the periphery element. The sensor further includes a sensor side connection portion, and the cap further includes a cap side connection portion. The sensor side connection portion is bonded to the cap side connection portion. At least one of the sensor side connection portion and the cap side connection portion provides an eutectic alloy so that the sensor side connection portion and the cap side connection portion are bonded to each other.
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Citations
22 Claims
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1. A semiconductor device comprising:
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a sensor including a sensor structure and a periphery element, wherein the sensor structure is disposed on a first side of the sensor, and the periphery element surrounds the sensor structure; and a cap covering the sensor structure and having a second side, which is bonded to the first side of the sensor, wherein the cap includes a first wiring layer, which is disposed on the second side of the cap, wherein the first wiring layer steps over the periphery element, wherein the sensor further includes a sensor side connection portion, and the cap further includes a cap side connection portion, wherein the sensor side connection portion is bonded to the cap side connection portion, wherein at least one of the sensor side connection portion and the cap side connection portion provides an eutectic alloy so that the sensor side connection portion and the cap side connection portion are bonded to each other, wherein the sensor further includes a SOI substrate having a first conductive layer, an insulation layer, and a second conductive layer, wherein the first conductive layer, the insulation layer, and the second conductive layer are stacked in this order, wherein the sensor structure and the periphery element are disposed in the first conductive layer, wherein the insulation layer includes a contact portion, which is disposed between the periphery element and the second conductive layer, wherein the contact portion electrically couples the periphery element and the second conductive layer, wherein the cap further includes a conductive substrate, wherein the cap side connection portion is disposed on the conductive substrate, wherein the cap further includes a second wiring layer having a wiring portion and a sealing portion, wherein the wiring portion is electrically isolated from the sealing portion, wherein the wiring portion and the sealing portion provide the cap side connection portion, wherein the wiring portion is bonded to a part of the sensor structure via the eutectic alloy, wherein the sealing portion has a ring shape, which corresponds to the periphery element, wherein the sealing portion is bonded to the periphery element via the eutectic alloy, and wherein the periphery element, the contact portion, the second conductive layer, the sealing portion, and the conductive substrate are electrically coupled with each other so that the periphery element, the contact portion, the second conductive layer, the sealing portion, and the conductive substrate have the same electric potential. - View Dependent Claims (2, 3, 4)
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5. A method for manufacturing a semiconductor device comprising:
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forming a sensor structure on a first side of a sensor; forming a periphery element surrounding the sensor structure; preparing a cap for covering the sensor structure; forming a first wiring layer on a second side of the cap; bonding the first side of the sensor and the second side of the cap, and forming a second wiring layer on the second side of the cap, wherein the first wiring layer steps over the periphery element, wherein the sensor includes a sensor side connection portion, and the cap includes a cap side connection portion, wherein the bonding includes alloying at least one of the sensor side connection portion and the cap side connection portion to be an eutectic alloy so that the sensor side connection portion and the cap side connection portion are bonded to each other, wherein a part of the sensor structure and the periphery element provide the sensor side connection portion, wherein the second wiring layer includes a wiring portion and a sealing portion, which provide the cap side connection portion, wherein the wiring portion is electrically isolated from the sealing portion, wherein the wiring portion and the sealing portion provide the cap side connection portion, wherein the wiring portion is bonded to the part of the sensor structure via the eutectic alloy, wherein the sealing portion has a ring shape, which corresponds to the periphery element, wherein the sealing portion is bonded to the periphery element via the eutectic alloy so that a sealed portion is provided between the cap and the sensor, wherein the sensor structure is accommodated in the sealed portion, wherein the sensor further includes a SOI substrate having a first conductive layer, an insulation layer, and a second conductive layer, which are stacked in this order, wherein the sensor structure and the periphery element are formed in the first conductive layer, wherein the method further comprises forming a contact in the insulation layer so as to electrically couple between the periphery element and the second conductive layer, wherein the cap further includes a conductive substrate, wherein the cap side connection portion is disposed on the conductive substrate, wherein the sealing portion is electrically coupled with the conductive substrate, and wherein the periphery element, the contact portion, the second conductive layer, the sealing portion, and the conductive substrate are electrically coupled with each other so that the periphery element, the contact portion, the second conductive layer, the sealing portion, and the conductive substrate have the same electric potential. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A semiconductor device comprising:
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a sensor having a plate shape and including a sensor structure, which is arranged on a first side of the sensor; and a cap having a second side, which is bonded to the first side of the sensor, wherein the cap includes a first wiring layer, an insulation film and a second wiring layer, which are disposed on the second side of the cap, wherein the first wiring layer connects between an outer periphery of the first side of the sensor and the sensor structure, wherein the insulation film is disposed on the first wiring layer, and includes an opening, wherein the first wiring layer is exposed from the insulation film via the opening, wherein the second wiring layer includes a wiring portion, wherein the wiring portion is disposed on the first wiring layer exposed from the insulation film, wherein the wiring portion has a concavity, which is disposed over the opening and is concaved toward the opening, wherein a region of the sensor structure connecting to the wiring portion is defined as a contact region, and wherein the contact region contacts a part of a surface of the wiring portion other than the concavity. - View Dependent Claims (17, 18, 19, 20)
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21. A method for manufacturing a semiconductor device comprising:
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forming a sensor structure on a first side of a sensor having a plate shape; forming and patterning a first wiring layer on a second side of a cap in such a manner that the first wiring layer connects between an outer periphery of the first side of the sensor and the sensor structure; forming an insulation film on the first wiring layer; forming an opening in the insulation film so as to expose the first wiring layer from the insulation film via the opening, wherein a region of the sensor structure to be connected to the cap is defined as a contact region, and the opening of the insulation film does not face the contact region; forming and patterning a second wiring layer on the insulation film so as to have a wiring portion, wherein the wiring portion is disposed on the first wiring layer exposed from the insulation film, and the wiring portion has a concavity with a bottom; flattening a surface of the wiring portion so as to leave the bottom of the concavity; and bonding the second side of the cap and the first side of the sensor in such a manner that the contact region of the sensor structure is bonded to a part of a surface of the wiring portion, which is spaced apart from a region of the wiring portion corresponding to the opening of the insulation film. - View Dependent Claims (22)
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Specification