Abstract

A nonvolatile and compact switch realizing multiple fan-outs of a crossbar switch for programmable logic devices (PLDs) has been newly developed by using two-varistors selected complementary atom switch (2V-1CAS). The two control lines connected to the varistors realize the accurate programming of each cross-point without select transistors. The novel nitrogen-modulated, TiN/a-Si/SiN/a-Si/TiN varistor shows superior nonlinear (NL) characteristic of ∼105, which are successfully stacked on the top of CAS with dual-hard mask (DHM) process. The developed 2V-1CAS (18F2) gives a promising switch block (SB) used for energy-efficient, nonvolatile PLDs.

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