H. Kang, H. Kye, Geun-Il Lee, Je-Hoon Park, Jun-Hwan Kim, Seaung-Suk Lee, S. Hong, Young-Jin Park, Jin-Yong Chung
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A hierarchy bitline boost scheme for sub-1.5 V operation and short precharge time on high density FeRAM
This work develops three concepts: low-voltage operation with boost voltage control of bitline and plateline, reduced bitline capacitance with multiple divided sub cell array, and increased chip performance with write operation sharing both active and precharge time period. A 256 kb test chip with 3.0/spl times/1.0 /spl mu/m/sup 2/ 1T1C memory cells in 0.25 /spl mu/m design roles is expected to achieve 180 ns access and 70 ns precharge at 1.5 V based on internal probing.
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