Patent ID: 6221495
Filing Date: 2001-04-24
Classification: C03C,C23C,H01L,Y02E

Abstract:
A process for preparing a Cd.sub.2 SnO.sub.4 film, the process comprising the steps of:(a) radio frequency sputter coating a substantially amorphous Cd.sub.2 SnO.sub.4 layer onto a first substrate from a target source having stoichiometric amounts of SnO.sub.2 and CdO;(b) depositing a CdS layer on a second substrate using a CdS layer coating means;(c) contacting the Cd.sub.2 SnO.sub.4 layer with the CdS layer in an environment essentially free of water and oxygen;(d) heating the first and second substrates and the Cd.sub.2 SnO.sub.4 and CdS layers to a treatment temperature sufficient to induce crystallization of the Cd.sub.2 SnO.sub.4 layer into a uniform single-phase spinel structure, for a time sufficient to allow full crystallization of the Cd.sub.2 SnO.sub.4 layer at the treatment temperature;(e) cooling the first and second substrates to room temperature; and(f) separating the first substrate having the crystallized Cd.sub.2 SnO.sub.4 film from the second substrate and the CdS layer.