Methods of forming semiconductor constructions
First Claim
1. A method of forming a semiconductor construction, comprising:
- forming a first semiconductor substrate comprising a first monocrystalline base and having a first transistor supported on the first monocrystalline base;
the first transistor having source/drain regions associated therewith;
the first substrate also having an insulative material formed over the base and silicon-containing plugs extending through the insulative material and to the source/drain regions;
the silicon-containing plugs being separated from one another by the insulative material and defining a planarized upper surface above the first monocrystalline base;
providing a second semiconductor substrate comprising a second monocrystalline base and bonding the second semiconductor substrate to the silicon-containing plugs at the planarized upper surface above the first monocrystalline base; and
forming a second transistor supported over the second substrate.
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Abstract
The invention includes a method of forming a semiconductor construction. A first substrate is provided which comprises silicon-containing structures separated from one another by an insulative material. The silicon-containing structures define an upper surface. A second semiconductor substrate is provided which comprises a monocrystalline material having a damage region therein. The second semiconductor substrate is bonded to the silicon-containing structures of the first substrate at the upper surface. The monocrystalline material is then cleaved along the damage region. The invention also encompasses a semiconductor construction comprising a first substrate having silicon-containing structures separated from one another by an insulative material, and a second substrate comprising a monocrystalline material. The silicon-containing structures of the first substrate define an upper surface, and the monocrystalline material of the second substrate is bonded over the silicon-containing structures at the upper surface.
264 Citations
16 Claims
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1. A method of forming a semiconductor construction, comprising:
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forming a first semiconductor substrate comprising a first monocrystalline base and having a first transistor supported on the first monocrystalline base;
the first transistor having source/drain regions associated therewith;
the first substrate also having an insulative material formed over the base and silicon-containing plugs extending through the insulative material and to the source/drain regions;
the silicon-containing plugs being separated from one another by the insulative material and defining a planarized upper surface above the first monocrystalline base;
providing a second semiconductor substrate comprising a second monocrystalline base and bonding the second semiconductor substrate to the silicon-containing plugs at the planarized upper surface above the first monocrystalline base; and
forming a second transistor supported over the second substrate. - View Dependent Claims (2, 3, 4)
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5. A method of forming a semiconductor construction, comprising:
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forming a first substrate comprising silicon-containing structures separated from one another by an insulative material;
the silicon-containing structures defining an upper surface;
bonding a second semiconductor substrate to the silicon-containing structures at the upper surface;
the second semiconductor substrate comprising a monocrystalline material which is bonded to the silicon-containing structures; and
forming at least one doped silicon region extending through the monocrystalline material and electrically contacting at least one of the silicon-containing structures. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
forming an opening through the monocrystalline material; and
filling the opening with an insulative material.
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10. The method of claim 5 wherein the forming the at least one doped silicon region comprises:
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forming an opening through the monocrystalline material; and
filling the opening with a doped silicon material.
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11. The method of claim 10 wherein the doped silicon material comprises doped amorphous silicon.
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12. The method of claim 10 wherein the doped silicon material comprises doped polycrystalline silicon.
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13. The method of claim 5 further comprising forming at least one second doped silicon region within the second monocrystalline base and which does not extend entirely through the second monocrystalline base.
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14. The method of claim 13 wherein the forming the at least one doped silicon region comprises:
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forming an opening through the monocrystalline material; and
filling the opening with a doped silicon material.
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15. The method of claim 14 wherein the doped silicon material comprises doped amorphous silicon.
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16. The method of claim 14 wherein the doped silicon material comprises doped polycrystalline silicon.
Specification