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Electrical Performance of 28 nm-Node Varying Channel-Width nMOSFETs under DPN Process Treatments
Shou-Yen Chao1, Wen-How Lan2, Shou-Kong Fan3
1Department of Electronic Engineering, Minghsin University of Science and Technology, Hsinchu 30401, Taiwan.
Abstract:
The decoupled-plasma nitridation treatment process is an effective recipe for repairing the trap issues when depositing high-k gate dielectric. Because of this effect, electrical performance is not only increased with the relative dielectric constant, but there is also a reduction in gate leakage. In the past, the effect of nitridation treatment on channel-length was revealed, but a channel-width effect with that treatment was not found. Sensing the different nano-node channel-width n-channel MOSFETs, the electrical characteristics of these test devices with nitridation treatments were studied and the relationship among them was analyzed. Based on measurement of the V, SS, G, I, and I values of the tested devices, the electrical performance of them related to process treatment is improved, including the roll-off effect of channel-width devices. On the whole, the lower thermal budget in nitridation treatment shows better electrical performance for the tested channel-width devices.
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