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Bandgap-tunable SiON (oxynitride) tunnel barrier is developed to optimize the performance and reliability of BE-SONOS NAND Flash devices. The HTO O2 layer of the ONO tunnel barrier is replaced by SiON thin films with various refractive index (n) and thickness. We found that with n ≤ 1.72, SiON can provide excellent data retention comparable to conventional BE-SONOS. On the other hand, the erase speed...
Although planar floating gate (FG) device using high-K IPD has been proposed, our study indicates that out tunneling through IPD due to the high electric field is inevitable, leading to programming/erasing saturation. Moreover, charge trapping in IPD is a major concern. In this work, we propose a completely different approach - using a trapping IPD for storage. Our concept is to combine the merits...
A novel p-channel NAND-type non-volatile flash memory using nitride-trapping device is presented. The p-channel device is programmed by very efficient band-to-band tunneling hot electron (BBHE), and erased by self-converging channel hole tunneling. An ultra-thin bandgap engineered ONO tunneling dielectric as presented in H. T. Lue et al. (2005) is adopted to achieve efficient hole-tunneling erase...
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