Abstract
Excellent PMOS short channel effect is achieved by using high energy, large tilt angle arsenic implant as P-Halo. For the first time, it was found that the tail profile of P-Halo implant through the polysilicon gate, therefore, the channel concentration is modulated not only laterally from gate edge but also vertically from top of the polysilicon gate and it resulted in very flat short channel behavior. The effect of arsenic P-Halo implant was comprehensively studied and well characterized to explain this specific phenomenon. The gate oxide integrity was examined by Q/sub BD/ and it passed the lifetime of 10 years at different conditions of P-Halo implants. Excellent performance of 0.12 um PMOSFET is also demonstrated in this work.
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