Stress Management in Sub-90-nm Transistor Architecture
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This brief focuses on the physical characteristics of three dielectric films which can induce a significant degree of tensile or compressive stress in the channel of a sub-90-nm node MOS structure. Manufacturable and highly reliable oxide films have demonstrated, based on simulation, the ability to induce greater than 1.5-GPa tensile stress in the Si channel, when used as shallow trench isolation (STI) fill. Low–temperatureblanketnitridefilmswithastressrangeof2GPacompressiveto greater than 1.4 GPa tensile were also developed to enhance performance in both PMOS and NMOS devices. Combined with a tensile first interlayer dielectric film, the stress management and optimization of the above films can yield significant performance improvement without additional cost, or integration complexities.
The article of record as published may be found at http://dx.doi.org/10.1109/TED.2004.835993
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