摘要:
A process for growing semi-insulating layers of indium phosphide and other group III-V materials through the use of halide dopant or etchant introduction during growth. Gas phase epitaxial growth techniques are utilized at low temperatures to produce indium phosphide layers having a resistivity greater than approximately 10.sup.7 ohm-cm. According to the preferred embodiment carbon tetrachloride is used as a dopant at flow rates above 5 sccm to grow the layers with substrate growth temperatures ranging from approximately 460.degree. C. to 525.degree. C. This temperature range provides an advantage over the transition metal techniques for doping indium phosphide since the high temperatures generally required for those techniques limit the ability to control growth. Good surface morphology is also obtained through the growth according to the present invention. The process may be used to form many types of group III-V semiconductor devices.
摘要:
The concentration of N acceptors in an as-grown epitaxial layer of a II-VI semiconductor compound is enhanced by the use of tertiary butyl amine as the dopant carrier, and is further enhanced by the use of photo-assisted growth using illumination whose wavelength is within the range of 200-250 nm.
摘要:
A method is provided for reducing leakage current in an integrated circuit (24). A first doped region (18) having a first conductivity type is formed in a semiconductor layer (10) having a second conductivity type, such that a second doped region (20) having the first conductivity type is formed in the semiconductor layer (10). The second doped region (20) is less conductive than the first doped region (18). The first doped region (18) is removed from the semiconductor layer (10), such that the second doped region (20) substantially remains in the semiconductor layer (10). The integrated circuit (24) is formed to include the second doped region (20) and the semiconductor layer (10).
摘要:
A semiconductor laser device of an AlGaInP system includes a GaAs substrate and a surface of the substrate is inclined by 5.degree. or more from a {100} plane in a direction.
摘要:
Method and apparatus for vapor phase free methyl radical transport of indium dopant species for precise predetermined reproducible doping concentrations to control electrical properties for MOCVD grown materials.
摘要:
In a method of manufacturing a Hg.sub.1-x Cd.sub.x Te (x=0 to 1) infrared detector using GaAs as a substrate, there is provided a method of depositing a HgCdTe film that has high crystalline quality. By changing the substrate temperature, it is possible to control the plane orientation of a CdTe buffer layer formed on a GaAs (211)B substrate. When the substrate temperature is high, the buffer layer is formed with plane orientation (133) and when the substrate temperature is low, the buffer layer is formed with plane orientation (211). In the former, it is possible to form a film having high crystalline quality as compared with that of a film in the latter.
摘要:
In a method for producing a II-VI compound semiconductor device including mercury, a thin film of a group II element or a group II element compound, which is a solid at room temperature, is deposited on a surface of a p type II-VI compound semiconductor. Annealing is carried out to diffuse the group II element from the thin film into the p type II-VI compound semiconductor whereby a region of the p type II-VI compound semiconductor on which the thin film is present is converted to n type, resulting in a p-n junction. Therefore, instruments and materials are easily handled, increasing work efficiency and productivity. In addition, the annealing is carried out without a complicated temperature profile, resulting in a simple process.
摘要:
This invention relates to ultra-thin semiconductor films which can be in the submicron range formed from semiconductor materials such as silicon, germanium and gallium aresenide. The films are formed by creating a thin slightly damaged surface on the polished reverse side of a film (e.g., a wafer) of the semiconductor by low dose ion implantation and then etching the semiconductor material on the front side of the film to remove the semiconductor material down to the ion implanted damaged layer. While the implanted ions can be chosen from functionally desirable ions which upon annealing remain in the film to alter the original electrical characteristics, the implanted ions can also be chosen so that upon annealing, the resultant ultra-thin semiconductor film has the same electrical characteristics as the original semiconductor material.The ion implantation changes the etching characteristics of the ion implanted layer. Thus, when the partially damaged semiconductor material is exposed to an etchant the etching rate in the damaged region is decreased by a factor of several thousand as compared to the undamagGOVERNMENT FUNDINGThe invention described and claimed herein was at least in part supported by the National Submicron Facility under NSF Grant #ECS-8200312 to the NRRFSS.
摘要:
The superlattice type semiconductor material has a multilayered structure of first layers of semiconductor containing impurities and having a thickness thinner than electron or hole wavelength and second layers of semiconductor free from impurities or insulator having such a thickness that electrons or holes may penetrate by tunneling effect, the first and second layers being alternately piled. Electrons or holes distribute uniformly over the entire of the multilayered structure to show a property of uniform semiconductor material.
摘要:
A high temperature method for the preparation of single and multiple epitaxial layers of single-phase lead sulfide-selenide, [Pb].sub.a [S.sub.x Se.sub.1-x ].sub.1-a wherein x varies between one and zero, inclusive, and a=0.500.+-.0.003, deposited upon substrates of barium fluoride, BaF.sub.2, maintained in near thermodynamic equilibrium with concurrently sublimated lead alloy and chalcogenide sources. During preparation, the substrate is exposed to the vapor emanating from the single chimney of a two-zone, dual-chamber furnace, thereby providing an epilayer of uniform, and predetermined electrical and optical properties.
摘要翻译:用于制备单相硫化铅/硒化物[Pb] a [SxSe1-x] 1-a的单个和多个外延层的高温方法,其中x在1和0之间变化,包括1和0,a = 0.500 + -0.003,沉积在与同时升华的铅合金和硫族化合物源保持接近热力学平衡的氟化钡BaF2的基底上。 在制备过程中,将基板暴露于由双区双腔炉的单个烟囱发出的蒸气中,从而提供均匀且预定的电气和光学特性的外延层。