摘要:
To improve the flatness of the surface and improve the reliability of a semiconductor device when expitaxially growing semiconductor crystal layers of different types on a single silicon wafer, provided is a semiconductor wafer which includes: a base wafer having a silicon crystal in the surface thereof, the silicon crystal having a first dent and a second dent; a first Group IVB semiconductor crystal located in the first dent and exposed; a second Group IVB semiconductor crystal located in the second dent; and a Group III-V compound semiconductor crystal located above the second Group IVB semiconductor crystal in the second dent and exposed.
摘要:
A digital camera includes: a mirror box that defines a space in which a light flux from a photographic lens is guided to an imaging unit; a mirror unit that is arranged inside the mirror box and is configured to rotate between a viewing position in which the mirror unit is inserted in a photographic light path from the photographic lens to the imaging unit to reflect the light flux and a photographing position in which the mirror unit is retracted from the photographic light path; and an opening section that discharges from the mirror box air that is moved when the mirror unit is rotated.
摘要:
A foam sheet produced from a foamable composition containing an acid generator that generates acid or a base generator that generates base due to the action of an active energy beam, and containing a compound having decomposing foamable functional group that decomposes and eliminates at least one type of low boiling point volatile substance by reacting with acid or base, makes it possible to obtain a microcellular thin foam that was considered to be difficult to produce thus far, thereby greatly expanding the range of fields in which foams can be used and significantly contributing to industry.
摘要:
A digital camera includes: a mirror box that defines a space in which a light flux from a photographic lens is guided to an imaging unit; a mirror unit that is arranged inside the mirror box and is configured to rotate between a viewing position in which the mirror unit is inserted in a photographic light path from the photographic lens to the imaging unit to reflect the light flux and a photographing position in which the mirror unit is retracted from the photographic light path; and an opening section that discharges from the mirror box air that is moved when the mirror unit is rotated.
摘要:
A foam production method including an irradiating step in which an active energy beam is irradiated onto a foamable composition containing an acid generating agent, which generates an acid, or a base generating agent, which generates a base, due to an action of an active energy beam, and containing a compound which has a decomposable/foamable functional group, which decomposes and eliminates one or more kinds of volatile substances with a low boiling point by reacting with the acid or base; and a subsequent foaming step in which the foamable composition is foamed under controlled pressure in a temperature region where the volatile substances with a low boiling point are decomposed and being eliminated.
摘要:
In a method of determining the quality of a semiconductor epitaxial crystal wafer having a buffer structure portion comprised of epitaxial layers the semiconductor epitaxial crystal wafer (S) is irradiated with pulsed exciting light (5A) to modulate an internal electric field of the buffer structure portion, the electric transport properties deriving from the crystal quality of the buffer structure of the semiconductor epitaxial crystal wafer (S) are predicted based on a spectral difference in reflectance in reflection probe light (3B) from the semiconductor epitaxial crystal wafer (S), to determine the crystal quality of the buffer structure portion. The crystal quality may also be determined based on electric field strength calculated from Franz-Keldysh oscillation originating in the semiconductor chemical compound of the buffer structure portion.
摘要:
The present invention discloses a foam sheet and its production process comprising the formation of a plurality of independent cells and/or a plurality of continuous cells. The foam sheet is produced from a foamable composition that contains an acid generator that generates an acid or a base generator that generates a base due to the action of an active energy beam and a compound that has a decomposing foarmable functional group that decomposes and eliminates one or more types of low boiling point volatile substances by reacting with the acid or base.
摘要:
In a semiconductor manufacturing system for manufacturing compound semiconductor by MOCVD, a lead-in member is provided for guiding feed gas supplied from a feed gas supply unit onto the surface of a semiconductor substrate disposed in a reactor, a main body of the lead-in member is constituted as a hollow member to form a feed gas guide passage for conducting the feed gas in an prescribed direction and is formed with multiple orifices, and the feed gas in the feed gas guide passage is jetted from the orifices in a direction perpendicular to the prescribed direction so that the semiconductor substrate is bathed in a feed gas flow of uniform amount jetted from the lead-in member in this manner. Furthermore, a pressure differential produced between the inner side and outer side of the nozzle member enables the feed gas jetted from the nozzle member to flow over the whole surface of the substrate at a uniform flow rate. The multiple feed gases are led to the vicinity of the substrate individually and the blow gas blows the multiple feed gases toward the substrate to favorably from desired thin film crystal.
摘要:
A device for the production of a semiconductor compound by means of a metal organic vapor phase epitaxy method, has a structure including a metallic member disposed at a part brought into contact with an upstream flow of a raw material gas and another part for growing a compound semiconductor, wherein the metallic member is cooled to not higher than 300.degree. C. The present invention provides a device for the production of a semiconductor compound with high productivity using a metallic material, wherein processing precision is high and the risk of breakage is low.
摘要:
The semiconductor wafer includes: a base wafer; and an inhibition layer that is disposed on the base wafer as one piece or to be separate portions from each other, and inhibits growth of a crystal of a compound semiconductor, where the inhibition layer has a plurality of first opening regions that have a plurality of openings penetrating the inhibition layer and leading to the base wafer, each of the plurality of first opening regions includes therein a plurality of first openings disposed in the same arrangement, some of the plurality of first openings are first element forming openings each provided with a first compound semiconductor on which an electronic element is to be formed, and the other of the plurality of first openings are first dummy openings in which no electronic element is to be formed.