Journal
APPLIED PHYSICS LETTERS
Volume 103, Issue 6, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4817927
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- U.S. Department of Energy's National Nuclear Security Administration [DE-AC0494AL85000]
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Standard deposition processes for depositing ReRAM oxides utilize mass flow of reactive gas to control stoichiometry and have difficulty depositing a precisely defined sub-stoichiometry within a forbidden region where film properties are discontinuous with mass flow. We show that by maintaining partial pressure within this discontinuous forbidden region, instead of by maintaining mass flow, we can optimize tantalum oxide device properties and reduce or eliminate the electroforming step. We also show that defining the partial pressure set point as a fraction of the forbidden region instead of as an absolute value can be used to improve wafer-to-wafer consistency with minimal recalibration efforts. (C) 2013 AIP Publishing LLC.
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