Oxide Semiconductor Memory Interface for Oxygen Diffusion Control

A barrier layer is introduced as an intermediary between the oxide semiconductor layer and the electrode. This barrier layer prevents oxygen diffusion from the electrode to the oxide semiconductor, thereby improving off-leakage current characteristics without complicating the overall manufacturing process. The barrier layer acts as a mediator that blocks harmful oxygen while allowing the device structure to remain relatively simple.

The barrier layer is selectively positioned only at the interface between the electrode and the oxide semiconductor layer, where oxygen diffusion occurs. This localized approach prevents oxygen diffusion exactly where it causes off-leakage current problems, while leaving the bulk oxide semiconductor material unchanged to maintain its high on-state current characteristics. The local application of the barrier layer resolves the contradiction by targeting only the problematic region.

The barrier layer serves as a protective intermediary that prevents oxygen diffusion during heating treatments and other manufacturing processes. By incorporating this single barrier layer, the patent achieves improved data storage reliability without significantly increasing device complexity. The barrier layer integrates seamlessly into the existing device structure, adding minimal complexity while providing robust protection against oxygen diffusion.