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We present the reliabilities in compressively strained SiGe channel pMOSFETs. A Si capping layer in SiGe channel pMOSFETs improved the negative bias temperature instability (NBTI) without device performance degradation. Also, the Si capped device exhibits the better NBTI reliability than the Si channel device. Because a Si capped structure forms the double barrier layer in the interface, it is the...
We present high pressure hydrogen annel (HPHA) effects in two types contact etch stop layer (CESL) nitride MOSFETs. Performances increased in both samples of using rapid thermal chemical vapor deposition (RTCVD) and plasma enhanced chemical vapor deposition (PECVD) nitride stress layers, but reliability only degraded in PECVD samples after HPHA.
We have investigated reliability characteristics for a high-k/metal gate MOSFET with strain engineering under constant voltage stress (CVS). Using contact edge stop layer (CESL), tensile and compressive strains are applied to the channel region. Since the compressive MOSFET has more hydrogen in the CESL, the MOSFET has lower reliability characteristics than others. Though the hydrogen can passivate...
The effects of a stressor nitride layer on device performance and reliability are investigated. To decouple intrinsic mechanical stress and process-related effects, device characteristics under mechanical-bending stress and stressor layers were compared. The compressive-stressor device exhibits improved initial interface quality, although slightly degraded reliability characteristics, due to an increased...
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