Variable Resistance Memory Electrode Layout Using TDMIT Sidewall Protection

The patent extracts and removes the harmful redeposited material layer formed during ion beam etching by using a separate removal process. This separates the etching function from the cleanup function, allowing each to be optimized independently and eliminating the need for multiple iterative etching cycles.

The patent introduces an intermediary removal process between the ion beam etching steps. This intermediary process specifically targets and removes the redeposited materials without requiring additional etching cycles, acting as a mediator that cleans up the contaminants created during the main etching process.

The patent extracts the removal function from the etching process sequence. Instead of using multiple etching processes where each removes different layers, the patent uses one etching process followed by a dedicated removal process that handles all redeposited materials, simplifying the overall process architecture.

The patent merges the removal of different types of deposited materials into a single removal process. Rather than requiring separate etching processes for different layers, the patent combines multiple removal operations into one unified process step, reducing process complexity.

The patent applies a preliminary action by forming a protective layer or modifying the etching environment before the main etching process. This preliminary modification prevents shunt failures from occurring during the etching process, allowing conventional simple etching processes to proceed without causing reliability issues.

The patent converts the potentially harmful effect of ion beam etching (which causes redeposition and shunt failures) into a beneficial process by controlling the etching conditions or adding protective measures that transform the harmful redeposition into a controlled feature, eliminating shunt failures while maintaining process simplicity.