摘要:
a-type or n-type thin film of silicon has the concentration of an impurity dopant element decreased adjacent to a boundary of film. The impurity dopant element in the portion of the silicon film from the surface to a predetermined depth is replaced by an element selected from the group consisting of fluorine, chlorine, bromine, iodine, and hydrogen.
摘要:
A method of producing thin films of silicon is characterized in that a p-type or n-type thin film of doped silicon having a dopant or impurity element is placed in a plasma atmosphere of elements selected from the group consisting of fluorine, chlorine, bromine, iodine, and hydrogen, whereby the concentration of an impurity element in the thin film is decreased adjacent to the surface of thin film and accordingly the impurity element is replaced by the plasma element adjacent to the surface of the thin film.
摘要:
A method of promoting the growth of plants which comprises applying to the surface of a plant growth medium to be exposed to a source of ultraviolet radiation a light-degradable mulching film for agricultural use, comprising a resin composition, whose resin components consist essentially of1. from 5 to 50 percent by weight of polyisobutylene oxide resin,2. the balance of a second resin component selected from the group consisting of at least one polyolefin resin and a mixture of at least one polyolefin resin and at least one polydiene resin.The resin composition can be made into a mulching film which, when exposed to the sunlight, photolytically degrades into a pulverized condition within a selected period of time.
摘要:
A silicon thin film is composed of primarily silicon atoms, 0 to 8 atm % hydrogen, at least one element selected from the group including fluorine, chlorine, bromine and iodine, and an impurity element, wherein about 80 to 100% of microcrystalline grains are interspersed in an amorphous phase. The thin film is produced by deposition on a substrate in a plasma atmosphere using as a raw material gas silane (SiH.sub.4) or halogenated silane (SiH.sub.o--3 X.sub.4--1) wherein X represents a halogen or a combination of two or more halogens, and a dopant gas mixed with the raw material gas. The method comprises the steps of: (1) diluting the mixed gas with hydrogen in a ratio of the diluting gas to the raw material gas of from 50:1 to 100:1, to control the film deposition rate to produce a layer including mixed crystalline and amorphous substances; and (2) applying an electric power to provide a plasma discharge power density of from 0.1 to about 0.5 W/cm.sup.2, at a reaction pressure of 5 to 10 torr.
摘要:
A resin composition, which is very highly electroconductive, comprises a vinylaromatic copolymer containing an unsaturated dicarboxylic acid anhydride and a metallic filler. It is also improved in mechanical properties.
摘要:
A resin composition is resistant to heat and impact and comprises (a) a polyphenylene ether resin, (b) a rubber graft copolymer resin obtained from a rubbery polymer having a glass transition temperature of 0.degree. C. or lower, an aromatic vinyl monomer and an alpha, beta-unsaturated dicarboxylic anhydride monomer and (c) a block copolymer of an aromatic vinyl monomer and an aliphatic diene monomer. It may contain a mono-olefinic monomer having a nitril or carboxylic ester group as the rubber graft copolymer resin.
摘要:
A mask for a selective growth of a solid, is provided in which the solid is selectively grown in a predetermined region of a substrate and growth on other regions is suppressed. A method is also provided for selectively growing a solid on only the predetermined region of a substrate using the mask. In the mask, a surface layer and an underlayer are provided, each having different chemical compositions. Thus, even if the mask is formed on a substrate in an ultra thin film, the generation of mask defects can be suppressed and stability provided to heat and electron beams.
摘要:
Heat-resistant, high-impact thermoplastic resin compositions comprising a graft copolymer (A) obtained by graft-copolymerizing an aromatic vinyl compound and an unsaturated carboxylic acid anhydride onto a rubbery polymer; a composite modifier (B) obtained by graft-copolymerizing an aromatic vinyl compound and a methacrylate ester monomer onto a diene rubber polymer; and an aromatic polycarbonate resin (C).
摘要:
An amorphous photovoltaic energy conversion element for use in a solar cell is composed of a first layer formed of a p-type material, a second layer formed of an intrinsic amorphous semiconductor having a potential gradient formed therein and a third layer formed of a metal capable of coming into ohmic contact with the aforementioned intrinsic layer of amorphous semiconductor and exhibiting a lower work function than the work function of the intrinsic layer of amorphous semiconductor.
摘要:
The pressure sensitive transferring adhesive tape which transfers adhesive agent layer alone to an adherent is widely well-known, and in this case, the adhesive agent layer applied to a supporter has to be cut after it has been transferred to the adherent. However, since the adhesive layer is coated continuously, this type has a weak point that the adhesive agent layer causes problem of stringiness and stretching and cannot be cut smoothly. In the present invention, above mentioned weak points are dissolved by coating adhesive agent layer by discontinuous island shape pattern or by making the surface of adhesive agent layer to have concave and convex shape.