630 results about "Epitaxial material" patented technology

Methods of depositing epitaxial material using a repeated deposition and etch process. The deposition and etch processes can be repeated until a desired thickness of silicon-containing material is achieved. During the deposition process, a doped silicon film can be deposited. The doped silicon film can be selectively deposited in a trench on a substrate. The trench can have a liner comprising silicon and carbon prior to depositing the doped silicon film. The doped silicon film may also contain germanium. Germanium can promote uniform dopant distribution within the doped silicon film.

Methods for selectively depositing high quality epitaxial material include introducing pulses of a silicon-source containing vapor while maintaining a continuous etchant flow. Epitaxial material is deposited on areas of a substrate, such as source and drain recesses. Between pulses, the etchant flow continues such that lower quality epitaxial material may be removed, as well as any non-epitaxial material that may have been deposited. The pulse of silicon-source containing vapor may be repeated until a desired thickness of epitaxial material is selectively achieved in semiconductor windows, such as recessed source/drain regions.

A method for rapid growth of gallium and nitrogen containing material is described. The method includes providing a bulk gallium and nitrogen containing substrate. A first epitaxial material of first thickness is formed over the substrate, preferably with a pseudomorphical process. The method also forms a second epitaxial layer over the first to create a stacked structure. The stacked structure consists of a total thickness of less than about 2 microns.

A media storage device and method for fabricating said device is provided. The device comprises a data layer capable of storing and erasing data via application of an energy beam, such as a near field optical non diffraction limited beam or electron beam. A separate capping layer is deposited on the data layer. The separate capping layer is relatively transparent to the energy beam and may be formed from various materials, including but not limited to an epitaxial material, a conducting material, and a robust high melting point material, such as Molybdenum.

A method of depositing one or more epitaxial material layers, a device structure formed using the method and a system for performing the method are disclosed. Exemplary methods include coating a surface of a reaction chamber with a precoat material, processing a number of substrates, and then cleaning the reaction chamber.

The invention relates to GaN-based Single chip white light emitting diode epitaxial material comprising a substrate and also comprising an initial growth layer, an intrinsic GaN buffer layer, an n-type GaN layer, a stress relaxation layer, an InGaN multiple quantum well structure light emitting layer, a p-type AlGaN sandwich layer and a p-type GaN layer which grow in sequence on the substrate. Thestress relaxation layer is an InGaN/GaN superlattice stress modulation layer which comprises InGaN layers and GaN layers, which are grown alternatively; the InGaN layers and GaN layers have the growth cycle of 6-500 and the corresponding thickness of 10 nm to 3 Mum; and the In components in the InGaN layers are in the range of 1-35 percent. Because the stress-relaxed InGaN/GaN superlattice stressmodulation layer is added between the n-type GaN layer and a multiple quantum light emitting layer, the In segregation effect is strengthened, InGaN quantum dots with different components are formed,and the mixing of different-wave light emitted by the InGaN quantum dots realizes the white light emitting. The cost of the white light emitting diode is reduced radically, the light emitting efficiency and the light using efficiency are increased and the integral performance of the white light emitting diode is improved.

A method includes forming a fin in a semiconductor substrate. A plurality of sacrificial gate structures are formed above the fin. A selected one of the sacrificial gate structures is removed to define a first opening that exposes a portion of the fin. An etch process is performed through the first opening on the exposed portion of the fin to define a first recess in the fin. The first recess is filled with a dielectric material to define a diffusion break in the fin. A device includes a fin defined in a substrate, a plurality of gates formed above the fin, a plurality of recesses filled with epitaxial material defined in the fin, and a diffusion break defined at least partially in the fin between two of the recesses filled with epitaxial material and extending above the fin.

Techniques for forming Ga-doped source drain contacts in Ge-based transistors are provided. In one aspect, a method for forming Ga-doped source and drain contacts includes the steps of: depositing a dielectric over a transistor; depositing a dielectric over the transistor; forming contact trenches in the dielectric over, and extending down to, source and drain regions of the transistor; depositing an epitaxial material into the contact trenches; implanting gallium ions into the epitaxial material to form an amorphous gallium-doped layer; and annealing the amorphous gallium-doped layer under conditions sufficient to form a crystalline gallium-doped layer having a homogenous gallium concentration of greater than about 5×10²⁰ at./cm³. Transistor devices are also provided utilizing the present Ga-doped source and drain contacts.

Approaches for enabling uniform epitaxial (epi) growth in an epi junction area of a semiconductor device (e.g., a fin field effect transistor device) are provided. Specifically, a semiconductor device is provided including a dummy gate and a set of fin field effect transistors (FinFETs) formed over a substrate; a spacer layer formed over the dummy gate and each of the set of FinFETs; and an epi material formed within a set of recesses in the substrate, the set of recesses formed prior to removal of an epi block layer over the dummy gate.

A complementary metal-oxide-semiconductor (CMOS) device includes a substrate with a first active region and a second active region; a first gate structure and a second gate structure, respectively disposed on the first active region and the second active region; a first spacer structure and a second spacer structure respectively disposed on sidewalls of the first gate structure and the second gate structure; a first LDD and a second LDD respectively disposed in the substrate at both sides of the first gate structure and the second gate structure; an epitaxial material layer, disposed in the first active region and located on a side of the first LDD; and a passivation layer, disposed on the first gate structure, the first spacer structure, and the first LDD and covering the second active region, wherein the passivation layer comprises a carbon-containing oxynitride layer.

Three dimensional quantum well transistors and fabrication methods are provided. A quantum well layer, a barrier layer, and a gate structure can be sequentially formed on an insulating surface of a fin part. The gate structure can be formed over the barrier layer and across the fin part. The QW layer and the barrier layer can form a hetero-junction of the transistor. A recess can be formed in the fin part on both sides of the gate structure to suspend a sidewall spacer. A source and a drain can be formed by growing an epitaxial material in the recess and the sidewall spacer formed on both sidewalls of the gate electrode can be positioned on surface of the source and the drain.

Hybrid bulk finFET and SOI finFET devices and methods for fabrication thereof are provided. In one aspect, a method for fabricating a CMOS circuit having SOI finFET and bulk finFET devices includes the following steps. A wafer is provided having an active layer separated from a substrate by a BOX. Portions of the active layer and BOX are removed in a second region of the wafer so as to expose the substrate. An epitaxial material is grown in the second region of the wafer templated from the substrate. Fins are etched in the active layer and in the epitaxial material using fin lithography hardmasks. Gate stacks are formed covering portions of the fins which serve as channel regions of the SOI finFET/bulk finFET devices. An epitaxial material is grown on exposed portions of the fins which serves as source and drain regions of the SOI finFET/bulk finFET devices.

The invention provides a foreign substrate of the semiconductor, comprising a substrate layer, an epitaxial layer and a buffer layer with nanotube materials between the substrate layer and the epitaxial layer. The invention also provides a growth method for the foreign substrate of the semiconductor. The invention has the advantages that: by adopting the buffer layer with nanotube materials and making use of the properties of the flexible linkage of the nanotube, the lattice mismatch and thermal mismatch between the epitaxial layer and the substrate layer are eliminated, so as to reduce the stress in the epitaxial layer; as to the provided growth method, during the growth process of the epitaxial layer on the surface of the nanotube, the nanotube as a nucleation center during the epitaxial process of the epitaxial materials is used for forming high-quality crystal nucleus at the initial epitaxial stage, thus being beneficial to improving the crystal quality of the epitaxial layer.

The invention relates to epitaxial material of white light GaN light emitting diode which requires no phosphor for conversion and manufacturing method thereof, i.e. employing conventional semiconductor device deposition technique to orderly deposit an initial growth layer, an intrinsic GaN buffer layer, a n-type GaN layer, a InGaN relaxation layer, an InGaN luminescent layer of multi quantum structure, a p-type AlGaN interlayer and a p-type GaN layer; and employing the epitaxial material to make single chip white light light emitting diode; the method preserves the manufacturing techniques for making current normal monochromatic light light emitting diode device, and only improves the growth process of the GaN based luminescent material, thus, the In component achieves the level to form In quantum dot, and a stress releasing layer is added. In this manner, in the precondition of not increasing the complexity of the device, the production cost for making white light light emitting diode can be basically reduced, and the light emitting efficiency and utilization can be increased, and the weakness of the white light light emitting diode which employs phosphor for conversion can be overcome, and the whole performance of white light light emitting diode can be improved.

This invention provides methods for fabricating substantially continuous layers of group III nitride semiconductor materials having low defect densities. The methods include epitaxial growth of nucleation layers on a base substrate, thermally treatment of said nucleation layer and epitaxial growth of a discontinuous masking layer. The methods outlined promote defect reduction through masking, annihilation and coalescence, therefore producing semiconductor structures with low defect densities. The invention can be applied to a wide range of semiconductor materials, both elemental semiconductors, e.g., combinations of Si (silicon) with strained Si (sSi) and/or Ge (germanium), and compound semiconductors, e.g., group II-VI and group III-V compound semiconductor materials.

Embodiments of the invention generally relate to epitaxial lift off (ELO) thin films and devices and methods used to form such films and devices. In one embodiment, a method for forming an ELO thin film is provided which includes depositing an epitaxial material over a sacrificial layer on a substrate, adhering a unidirectionally induced-shrinkage support handle onto the epitaxial material, and shrinking the support handle tangential to reinforcement fibers therein to form tension in the support handle and compression in the epitaxial material during the shrinking process. The unidirectionally induced-shrinkage support handle contains a shrinkable material and reinforcement fibers extending unidirectional throughout the shrinkable material. The method further includes removing the sacrificial layer during an etching process, peeling the epitaxial material from the substrate while forming an etch crevice therebetween, and bending the support handle to have substantial curvature.

Epitaxial lift off systems and methods are presented. In one embodiment a tape is disposed on the opposite side of the epitaxial material than the substrate is used to hold the epitaxial material during the etching and removal steps of the ELO process. In various embodiments, the apparatus for removing the ELO film from the substrates without damaging the ELO film may include an etchant reservoir, substrate handling and tape handling mechanisms, including mechanisms to manipulate (e.g., cause tension, peel, widen the etch gap, etc.) the lift off component during the lift off process.

Embodiments of the invention generally relate to epitaxial lift off (ELO) thin films and devices and methods used to form such films and devices. In one embodiment, a method for forming an ELO thin film is provided which includes depositing an epitaxial material over a sacrificial layer on a substrate, adhering a flattened, pre-curved support handle onto the epitaxial material, and removing the sacrificial layer during an etching process. The etching process includes bending the pre-curved support handle to have substantial curvature while peeling the epitaxial material from the substrate and forming an etch crevice therebetween. Compression is maintained within the epitaxial material during the etching process. The flattened, pre-curved support handle may be formed by flattening a pre-curved support material.

The invention discloses a novel epitaxy method for growing an ultraviolet LED. The method can obviously improve the crystal quality of ultraviolet LED epitaxial growth materials and improve the light intensity of the ultraviolet LED. According to the method, an Al component gradient method is adopted to carry out doping in AlN, stress of crystal lattice adaption from a substrate layer can be released gradually, gradient component growth can reduce defects of crystal lattice adaption of an interface, the crystal quality of a material interface can be improved, slip dislocation can be carried out in gradient growth, penetration dislocation segregation is achieved, penetration dislocation is well stopped from entering a quantum well area, a quite good substrate is provided for growth of the quantum well, influences on quantum well growth caused by stress generated due to the crystal lattice adaption are reduced greatly, the integral crystal quality of materials is improved, the electron hole wave function spatial overlapping of a quantum well layer is enhanced, and optical and electrical properties of the whole ultraviolet LED are improved.