摘要:
A transistor may be formed of different layers of silicon germanium, a lowest layer having a graded germanium concentration and upper layers having constant germanium concentrations such that the lowest layer is of the form Si1-xGex. The highest layer may be of the form Si1-yGey on the PMOS side. A source and drain may be formed of epitaxial silicon germanium of the form Si1-zGez on the PMOS side. In some embodiments, x is greater than y and z is greater than x in the PMOS device. Thus, a PMOS device may be formed with both uniaxial compressive stress in the channel direction and in-plane biaxial compressive stress. This combination of stress may result in higher mobility and increased device performance in some cases.
摘要翻译:晶体管可以由不同层的硅锗形成,具有梯度锗浓度的最低层和具有恒定锗浓度的上层,使得最底层具有Si 1-x Ge Ge > x SUB>。 在PMOS侧,最高层可以是Si 1-y N y O y的形式。 源极和漏极可以由PMOS侧的Si 1-z N z z z的外延硅锗形成。 在一些实施例中,在PMOS器件中,x大于y且z大于x。 因此,PMOS器件可以在通道方向上具有单轴压应力和面内双轴压应力。 在某些情况下,应力的这种组合可能导致较高的移动性和增加的设备性能。
摘要:
Methods of forming a microelectronic structure are described. Embodiments of those methods include providing a gate structure disposed on a substrate comprising at least one recess, wherein a channel region is in a direction, and then forming a compressive layer in the at least one recess.
摘要:
Provided are a method and a system, wherein optical beams of a plurality of wavelengths are directed through a plurality of optical devices, wherein waveguides comprising the optical devices have different fabrication errors, and wherein the waveguides have a plurality of waveguide lengths and a plurality of waveguide widths. Optical phase errors corresponding to the waveguides are measured by the optical devices. A determination is made of the components of the optical phase errors for the waveguides from the measured phase errors.