摘要:
The fabrication of a tri-gate transistor formed with a replacement gate process is described. A nitride dummy gate, in one embodiment, is used allowing the growth of epitaxial source and drain regions immediately adjacent to the dummy gate. This reduces the external resistance.
摘要:
Described herein are a device utilizing a gate electrode material with a single work function for both the pMOS and nMOS transistors where the magnitude of the transistor threshold voltages is modified by semiconductor band engineering and article made thereby. Further described herein are methods of fabricating a device formed of complementary (pMOS and nMOS) transistors having semiconductor channel regions which have been band gap engineered to achieve a low threshold voltage.
摘要:
A process capable of integrating both planar and non-planar transistors onto a bulk semiconductor substrate, wherein the channel of all transistors is definable over a continuous range of widths.
摘要:
Embodiments of the invention provide a substrate with a surface having different crystal orientations in different areas. Embodiments of the invention provide a substrate with a portion having a crystal orientation and another portion having a crystal orientation. N— and P-type devices may both be formed on the substrate, with each type of device having the proper crystal orientation for optimum performance.
摘要:
A method of patterning a semiconductor film is described. According to an embodiment of the present invention, a hard mask material is formed on a silicon film having a global crystal orientation wherein the semiconductor film has a first crystal plane and second crystal plane, wherein the first crystal plane is denser than the second crystal plane and wherein the hard mask is formed on the second crystal plane. Next, the hard mask and semiconductor film are patterned into a hard mask covered semiconductor structure. The hard mask covered semiconductor structured is then exposed to a wet etch process which has sufficient chemical strength to etch the second crystal plane but insufficient chemical strength to etch the first crystal plane.
摘要:
An NMOS transistor may be formed with a biaxially strained silicon upper layer having a thickness of greater than 500 Angstroms. The resulting NMOS transistor may have good performance and may exhibit reduced self-heating. A PMOS transistor may be formed with both a biaxially and uniaxially strained silicon germanium layer. A source substrate bias applied to both NMOS and PMOS transistors can enhance their performance.
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:
A sacrificial gate structure, including nitride and fill layers, may be replaced with a metal gate electrode. The metal gate electrode may again be covered with a nitride layer covered by a fill layer. The replacement of the nitride and fill layers may reintroduce strain and provide an etch stop.
摘要:
The present invention relates to a Tunnel Field Effect Transistor (TFET), which utilizes angle implantation and amorphization to form asymmetric source and drain regions. The TFET further comprises a silicon germanium alloy epitaxial source region with a conductivity opposite that of the drain.
摘要:
A method for making a semiconductor device is described. That method comprises forming a high-k gate dielectric layer on a substrate, forming a barrier layer on the high-k gate dielectric layer, and forming a fully silicided gate electrode on the barrier layer.