Stack-type semiconductor device
First Claim
1. A semiconductor device comprising:
- a lower device including a lower substrate, a lower interconnection structure on the lower substrate, a lower pad on the lower interconnection structure, and a lower interlayer insulation covering side surfaces of the lower interconnection structure and of the lower pad; and
an upper device disposed on the lower device and including an upper substrate, an upper interconnection structure under the upper substrate, an upper pad under the upper interconnection structure, and an upper interlayer insulation covering side surfaces of the upper interconnection structure and of the upper pad, andwherein the lower pad has a first portion and a second portion, the first portion of the lower pad being thicker, in a vertical direction, than the second portion of the lower pad,the upper pad has a first portion and a second portion, the first portion of the upper pad being thicker, in the vertical direction, than the second portion of the upper pad, andthe second portion of the lower pad is bonded to the upper pad at the second portion of the upper pad, the first portion of the lower pad is in contact with a lower surface of the upper interlayer insulation, and the first portion of the upper pad is in contact with an upper surface of the lower interlayer insulation.
1 Assignment
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Accused Products
Abstract
A stack-type semiconductor device includes a lower device and an upper device disposed on the lower device. The lower device includes a lower substrate, a lower interconnection on the lower substrate, a lower pad on the lower interconnection, and a lower interlayer insulating layer covering side surfaces of the lower interconnection and the lower pad. The upper device includes an upper substrate, an upper interconnection under the upper substrate, an upper pad under the upper interconnection, and an upper interlayer insulating layer covering side surfaces of the upper interconnection and the upper pad. Each of the pads has a thick portion and a thin portion. The thin portions of the pads are bonded to each other, the thick portion of the lower pad contacts the bottom of the upper interlayer insulating layer, and the thick portion of the upper pad contacts the top of the lower interlayer insulating layer.
16 Citations
20 Claims
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1. A semiconductor device comprising:
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a lower device including a lower substrate, a lower interconnection structure on the lower substrate, a lower pad on the lower interconnection structure, and a lower interlayer insulation covering side surfaces of the lower interconnection structure and of the lower pad; and an upper device disposed on the lower device and including an upper substrate, an upper interconnection structure under the upper substrate, an upper pad under the upper interconnection structure, and an upper interlayer insulation covering side surfaces of the upper interconnection structure and of the upper pad, and wherein the lower pad has a first portion and a second portion, the first portion of the lower pad being thicker, in a vertical direction, than the second portion of the lower pad, the upper pad has a first portion and a second portion, the first portion of the upper pad being thicker, in the vertical direction, than the second portion of the upper pad, and the second portion of the lower pad is bonded to the upper pad at the second portion of the upper pad, the first portion of the lower pad is in contact with a lower surface of the upper interlayer insulation, and the first portion of the upper pad is in contact with an upper surface of the lower interlayer insulation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A semiconductor device comprising:
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a lower substrate; a lower interconnection structure disposed on the lower substrate; a lower pad disposed on the lower interconnection structure, wherein the lower pad has a first portion that is in contact with the lower interconnection structure, and a second portion that is connected to an upper portion of one side of the first portion of the lower pad, the second portion of the lower pad being thinner than the first portion of the lower pad in a vertical direction; an upper pad disposed on the lower pad, wherein the upper pad has a first portion, and a second portion that is connected to a lower portion of one side of the first portion of the upper pad and is bonded to the second portion of the lower pad, the second portion of the upper pad being thinner than the first portion of the upper pad in the vertical direction; an upper interconnection structure disposed on the upper pad and in contact with the first portion of the upper pad; and an upper substrate disposed on the upper interconnection structure, wherein the first portion of the lower pad and the first portion of the upper pad are disposed along a diagonal direction that is inclined relative to the vertical direction. - View Dependent Claims (14, 15)
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16. A semiconductor device comprising:
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a lower semiconductor substrate; a lower interlayer insulation disposed on the lower semiconductor substrate and having an upper surface; an upper interlayer insulation disposed on the lower interlayer insulation and having a lower surface constituting an interface with the upper surface of the lower interlayer insulation; an upper semiconductor substrate disposed on the upper interlayer insulation; and an interlayer contact structure embedded in the upper and lower interlayer insulation, the interlayer contact structure including; a lower land of conductive material disposed in an upper portion of the lower interlayer insulation, a lower via integral with the lower land at an outer peripheral portion of the lower land and extending vertically within the lower interlayer insulation, an upper land of conductive material disposed in a lower portion of the upper interlayer insulation, and an upper via integral with the upper land at an outer peripheral portion of the upper land and extending vertically within the upper interlayer insulation, and wherein at least parts of the upper and lower lands are disposed directly across from one another on opposite sides of a plane coincident with the interface between the lower interlayer insulation and upper interlayer insulation, the upper and lower vias are laterally offset entirely from each other, the lower via extends further into the lower interlayer insulation than the lower land relative to said plane coincident with the interface between the lower interlayer insulation and upper interlayer insulation, and the upper via extends further into the upper interlayer insulation than the upper land relative to said plane coincident with the interface between the lower interlayer insulation and upper interlayer insulation. - View Dependent Claims (17, 18, 19, 20)
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Specification