摘要:
Embodiments of the present invention describe a method of fabricating low resistance contact layers on a semiconductor device. The semiconductor device comprises a substrate having source and drain regions. The substrate is alternatingly exposed to a first precursor and a second precursor to selectively deposit an amorphous semiconductor layer onto each of the source and drain regions. A metal layer is then deposited over the amorphous semiconductor layer on each of the source and drain regions. An annealing process is then performed on the substrate to allow the metal layer to react with amorphous semiconductor layer to form a low resistance contact layer on each of the source and drain regions. The low resistance contact layer on each of the source and drain regions can be formed as either a silicide layer or germanide layer depending on the type of precursors used.
摘要:
Germanium on insulator (GOI) semiconductor substrates are generally described. In one example, a GOI semiconductor substrate comprises a semiconductor substrate comprising an insulative surface region wherein a concentration of dopant in the insulative surface region is less than a concentration of dopant in the semiconductor substrate outside of the insulative surface region and a thin film of germanium coupled to the insulative surface region of the semiconductor substrate wherein the thin film of germanium and the insulative surface region are simultaneously formed by oxidation anneal of a thin film of silicon germanium (Si1-xGex) deposited to the semiconductor substrate wherein x is a value between 0 and 1 that provides a relative amount of silicon and germanium in the thin film of Si1-xGex.
摘要:
Techniques are disclosed for forming transistor devices having source and drain regions with high concentrations of boron doped germanium. In some embodiments, an in situ boron doped germanium, or alternatively, boron doped silicon germanium capped with a heavily boron doped germanium layer, are provided using selective epitaxial deposition in the source and drain regions and their corresponding tip regions. In some such cases, germanium concentration can be, for example, in excess of 50 atomic % and up to 100 atomic %, and the boron concentration can be, for instance, in excess of 1E20 cm−3. A buffer providing graded germanium and/or boron concentrations can be used to better interface disparate layers. The concentration of boron doped in the germanium at the epi-metal interface effectively lowers parasitic resistance without degrading tip abruptness. The techniques can be embodied, for instance, in planar or non-planar transistor devices.
摘要:
The present disclosure relates to the field of fabricating microelectronic devices. In at least one embodiment, the present disclosure relates to forming an isolated nanowire, wherein isolation structure adjacent the nanowire provides a substantially level surface for the formation of microelectronic structures thereon.
摘要:
Techniques are disclosed for providing a low resistance self-aligned contacts to devices formed in a semiconductor heterostructure. The techniques can be used, for example, for forming contacts to the gate, source and drain regions of a quantum well transistor fabricated in III-V and SiGe/Ge material systems. Unlike conventional contact process flows which result in a relatively large space between the source/drain contacts to gate, the resulting source and drain contacts provided by the techniques described herein are self-aligned, in that each contact is aligned to the gate electrode and isolated therefrom via spacer material.
摘要:
An embodiment includes depositing a material onto a substrate where the material includes a different lattice constant than the substrate (e.g., III-V or IV epitaxial (EPI) material on a Si substrate). An embodiment includes an EPI layer formed within a trench having walls that narrow as the trench extends upwards. An embodiment includes an EPI layer formed within a trench using multiple growth temperatures. A defect barrier, formed in the EPI layer when the temperature changes, contains defects within the trench and below the defect barrier. The EPI layer above the defect barrier and within the trench is relatively defect free. An embodiment includes an EPI layer annealed within a trench to induce defect annihilation. An embodiment includes an EPI superlattice formed within a trench and covered with a relatively defect free EPI layer (that is still included in the trench). Other embodiments are described herein.
摘要:
Embodiments of an apparatus and methods for providing three-dimensional complementary metal oxide semiconductor devices comprising modulation doped transistors are generally described herein. Other embodiments may be described and claimed.
摘要:
A method is provided. The method includes forming a plurality of nanowires on a top surface of a substrate and forming an oxide layer adjacent to a bottom surface of each of the plurality of nanowires, wherein the oxide layer is to isolate each of the plurality of nanowires from the substrate.
摘要:
A method is provided. The method includes forming a plurality of nanowires on a top surface of a substrate and forming an oxide layer adjacent to a bottom surface of each of the plurality of nanowires, wherein the oxide layer is to isolate each of the plurality of nanowires from the substrate.
摘要:
Techniques are disclosed for forming a non-planar germanium quantum well structure. In particular, the quantum well structure can be implemented with group IV or III-V semiconductor materials and includes a germanium fin structure. In one example case, a non-planar quantum well device is provided, which includes a quantum well structure having a substrate (e.g. SiGe or GaAs buffer on silicon), a IV or III-V material barrier layer (e.g., SiGe or GaAs or AlGaAs), a doping layer (e.g., delta/modulation doped), and an undoped germanium quantum well layer. An undoped germanium fin structure is formed in the quantum well structure, and a top barrier layer deposited over the fin structure. A gate metal can be deposited across the fin structure. Drain/source regions can be formed at respective ends of the fin structure.