Patent ID: 6844243

Claim:
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 semiconductor-material-containing plugs extending through the insulative material and to the source/drain regions; the semiconductor-material-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 semiconductor-material-containing plugs at the planarized upper surface above the first monocrystalline base; and forming a second transistor supported over the second substrate.