Patent ID: 7087526

Claim:
A method of calcium-doped SrCu 2 O 2 spin-on precursor synthesis and low temperature p-type thin film deposition, comprising: preparing a wafer to receive a spin-coating thereon; selecting metalorganic compounds to form a CaO-doped SrCu 2 O 2 precursor includes selecting calcium acetate monohydrate (Ca(OAc) 2 .H 2 O, where OAc is acetate), strontium acetate (Sr(OAc) 2 ) and copper(II) acetate monohydrate (Cu(OAc) 2 .H 2 O), and acetic acid (HOAc) as a solvent; mixing and refluxing the selected metalorganic compounds to form a precursor mixture having solvents therein; filtering the precursor mixture to produce a spin-coating precursor; applying the spin-coating precursor to the wafer in a two-step spin coating procedure, including: spin coating the wafer at a first, slow spin speed; and spreading the spin-coating precursor on the wafer at a second, higher spin speed; baking the spin-coated wafer using a hot-plate bake to evaporate substantially all of the solvents; and annealing the spin-coated wafer to form a CaO-doped SrCu 2 O 2 layer thereon.