Method for making a semiconductor device comprising a lattice matching layer
First Claim
1. A method for making a semiconductor device comprising:
- forming a first monocrystalline layer comprising a first material having a first lattice constant, a second monocrystalline layer comprising a second material having a second lattice constant different than the first lattice constant, and a lattice matching layer between the first and second monocrystalline layers and comprising a superlattice;
the superlattice comprising a plurality of groups of layers, and at least one group of layers comprising a plurality of stacked semiconductor monolayers defining a semiconductor base portion and at least one non-semiconductor monolayer thereon;
the at least one non-semiconductor monolayer being constrained within a crystal lattice of adjacent base semiconductor portions, and at least some semiconductor atoms from opposing base semiconductor portions being chemically bound together through the at least one non-semiconductor monolayer therebetween.
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Abstract
A method for making a semiconductor device which may include forming a first monocrystalline layer comprising a first material having a first lattice constant, a second monocrystalline layer including a second material having a second lattice constant different than the first lattice constant, and a lattice matching layer between the first and second monocrystalline layers and comprising a superlattice. More particularly, the superlattice may include a plurality of groups of layers, and each group of layers may include a plurality of stacked semiconductor monolayers defining a semiconductor base portion and at least one non-semiconductor monolayer thereon. Furthermore, the at least one non-semiconductor monolayer may be constrained within a crystal lattice of adjacent base semiconductor portions, and at least some semiconductor atoms from opposing base semiconductor portions may be chemically bound together through the at least one non-semiconductor monolayer therebetween.
135 Citations
28 Claims
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1. A method for making a semiconductor device comprising:
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forming a first monocrystalline layer comprising a first material having a first lattice constant, a second monocrystalline layer comprising a second material having a second lattice constant different than the first lattice constant, and a lattice matching layer between the first and second monocrystalline layers and comprising a superlattice; the superlattice comprising a plurality of groups of layers, and at least one group of layers comprising a plurality of stacked semiconductor monolayers defining a semiconductor base portion and at least one non-semiconductor monolayer thereon; the at least one non-semiconductor monolayer being constrained within a crystal lattice of adjacent base semiconductor portions, and at least some semiconductor atoms from opposing base semiconductor portions being chemically bound together through the at least one non-semiconductor monolayer therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for making a semiconductor device comprising:
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forming a first monocrystalline layer comprising a first material having a first lattice constant, a second monocrystalline layer comprising a second material having a second lattice constant different than the first lattice constant, and a lattice matching layer between the first and second monocrystalline layers; the lattice matching layer comprising at least one lower semiconductor monolayer adjacent the first monocrystalline layer, at least one upper semiconductor monolayer adjacent the second monocrystalline layer, and at least one non-semiconductor monolayer between the at least one lower and at least one upper semiconductor monolayers; the at least one non-semiconductor monolayer being constrained within a crystal lattice of adjacent upper and lower semiconductor monolayers, and at least some semiconductor atoms from the at least one upper and at least one lower semiconductor monolayers being chemically bound together through the at least one non-semiconductor monolayer therebetween. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for making a semiconductor device comprising:
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forming a first monocrystalline layer comprising silicon and having a first lattice constant; forming a lattice matching layer on the first monocrystalline layer and comprising a superlattice; the superlattice comprising a plurality of groups of layers, and each group of layers comprising a plurality of stacked semiconductor monolayers defining a semiconductor base portion and at least one non-semiconductor monolayer thereon; the at least one non-semiconductor monolayer being constrained within a crystal lattice of adjacent base semiconductor portions, and at least some semiconductor atoms from opposing base semiconductor portions being chemically bound together through the at least one non-semiconductor monolayer therebetween; forming a second monocrystalline layer on the lattice matching layer comprising germanium and having a second lattice constant different than the first lattice constant; and forming at least one active region in the second monocrystalline layer. - View Dependent Claims (24, 25, 26, 27, 28)
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Specification