US Patent 7432562 SRAM devices, and electronic systems comprising SRAM devices

The invention includes SRAM constructions comprising at least one transistor device having an active region extending into a crystalline layer comprising Si/Ge. A majority of the active region within the crystalline layer is within a single crystal of the crystalline layer, and in particular aspects an entirety of the active region within the crystalline layer is within a single crystal of the crystalline layer. The SRAM constructions can be formed in semiconductor on insulator assemblies, and such assemblies can be supported by a diverse range of substrates, including, for example, glass, semiconductor substrates, metal, insulative materials, and plastics. The invention also includes electronic systems comprising SRAM constructions.