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Non-volatile memories used in the space environment typically require radiation hardened process technologies. These technologies are not only costly, but the resultant die occupies more area compared to commercial memories of comparable size. This in turn limits the memory density of these radiation hardened memories. In this paper, we present a technique for the development of a low cost 1 Gb radiation hardened (Rad Hard) NAND flash memory manufactured with commercial components. The design methodology provides an alternate strategy for producing radiation hardened memory while simultaneously achieving higher cell densities at lower costs.