Abstract: A method of reversibly whitening teeth in the presence of water which comprises allowing a tooth whitening component to infiltrate into the enamel surface layer toward the inside and remain therein so as to make the enamel cloudy and white by altering its optical properties without causing any chemical reactions, thereby whiten the thus treated teeth compared with untreated ones.

Abstract: The foamed laminate based on olefin according to the present invention is composed of a substrate layer of a foamed body made of either an ethylenic thermoplastic elastomer comprising a polyethylene resin and an ethylene/?-olefin copolymer having a Mooney viscosity ML1+4 (100° C.) of 90-250 and an ethylene content of 70-95 mole % or an ethylenic thermoplastic elastomer composition comprising 100 parts by weight of an olefinic thermoplastic elastomer and 1-20 parts by weight of an olefinic thermoplastic resin and, under lamination thereon, a skin layer made of either an ultrahigh molecular weight polyolefin resin having an intrinsic viscosity of 3.5-8.3 dl/g or made of an olefinic thermoplastic elastomer composition comprising an olefinic thermoplastic elastomer and a lubricant.

Abstract: According to the present invention, a semiconductor device includes a semiconductor layer; a device-isolation region formed in the semiconductor layer; an active region surrounded by the device isolation region; and a gap, formed at boundary between the device isolation region and the active region. The gap is not formed under the active region. The gap is formed on a side wall portion of the active region, which extends in a depth direction.

Abstract: A nonaqueous gel composition for tooth whitening, comprising: (A) tooth whitening ingredient having a relative permittivity of 17.0 to 43.0 (at 25° C.) and a vapor pressure of 0 to 7000 kPa (at 25° C.), (B) substance that is soluble in the tooth whitening ingredient and is precipitated by an aqueous solution of calcium chloride, and (C) gelling agent, which nonaqueous gel composition contains substantially none of water and peroxide. This tooth whitening component can penetrate into the enamel surface layer of teeth to thereby alter the optical properties, such as refractive index and reflectance, of the enamel so that the enamel is apparently whitened. The whitened teeth can be restored to the original tooth color in a reversible manner in the presence of water. Further the persistence of reversible whitening effect can be strikingly enhanced by the nonaqueous gel composition.

Abstract: An olefin thermoplastic elastomer composition which is superior in the resistance to oils, heat resistance, formability and flexibility is provided, said elestomer composition comprising the components (A) 40–90 parts by weight of a polypropylene resin having a melt flow rate (determined at 230 ° C. under a load of 2.16 kg according to ASTM D 1238) of 0.1–5 g/10 minutes, (B) 10–60 parts by weight of a copolymer rubber based on olefin, the contents of the components (A) and (B) summing up to 100 parts by weight, and (C) 20–150 parts by weight of a softener, wherein the composition is in such a cross-linked state that the gel content thereof amounts to 97% by weight or higher.

Abstract: This invention relates to a perfectly or partially crosslinked olefinic thermoplastic elastomer composition which comprises 10 to 90 parts by weight of a crystalline polyolefin (a), 90 to 10 parts by weight of an olefin-based copolymer rubber (b) (the total amount of the components (a) and (b) being 100 parts by weight) and 3 to 100 parts by weight of a paraffinic mineral oil softening agent (c) having an evaporation loss of 0.4% by weight or less at a condition of 200° C., atmospheric pressure and 1 hour and having a kinetic viscosity (40° C.

Abstract: A resist pattern is formed at an outermost peripheral end of the surface of a wafer. Thereafter, the back of the wafer is back-etched using chemicals to thin the wafer. A passivation film is left behind only at scribe lines for separating semiconductor chips located at the outermost peripheral end of the wafer surface and thereafter the wafer is back-etched.

Abstract: There is provided a flexible printed wiring board including an insulating layer having a high optical transmittance, a high adhesion strength and a high migration resistance, and suitable for a chip on film (hereafter referred to as COF). In a flexible printed wiring board for COF, having an insulating layer on which a conductive layer of an electrodeposited copper foil is laminated, and an optical transmittance of 50% or more of the insulating layer in the etched region when a circuit is formed by etching said conductive layer, electrodeposited copper foil was made to have a rust-proofing layer of a nickel-zinc alloy on the adhering surface to be adhered to the insulating layer; the surface roughness (Rz) of the adhering surface was made to be 0.05 to 1.5 ?m, and the specular gloss was made to be 250 or more when the incident angle is 60°.

Abstract: An oil filter for preliminarily confirming a correct assembling of a valve body to a holder and for preventing the valve body from being abnormally assembled. A valve seat 22 is welded to a cap 14 covering a filter element 12. A claw portion for a valve body 25e is formed on the valve body 25, and an engagement portion for the valve body 27e to be engaged with the claw portion for the valve body 25e is formed on a holder 15 assembled with the inner peripheral side of the filter element 12. In addition, a spring member 29 is fitted between the valve body 25 and a spring receiving portion 27 provided for the holder 15. By the engagement of the claw portion for the valve body 25e with the engagement portion for the valve body 27e, the valve body 25 is assembled with the holder 15.

Abstract: A method of reversibly whitening teeth in the presence of water which comprises allowing a tooth whitening component to infiltrate into the enamel surface layer toward the inside and remain therein so as to make the enamel cloudy and white by altering its optical properties without causing any chemical reactions, thereby whiten the thus treated teeth compared with untreated ones.

Abstract: The present invention relates to an olefinic thermoplastic elastomer composition obtainable by dynamically heat treating 5 to 50 parts by weight of a polypropylene resin (A) and 50 to 95 parts by weight of an &agr;-olefinic copolymer (B) having a Mooney viscosity ML1+4 (100° C.) of 60 to 250 in the absence of a crosslinking agent.

Abstract: An olefin-based thermoplastic elastomer composition comprising a thermoplastic elastomer blended with other resins and rubbers is provided. The thermoplastic elastomer contains polypropylene resin and an olefin-based copolymer rubber, and optionally, a linear polyethylene resin, and the thermoplastic elastomer has been crosslinked to a gel content of 95% or higher. A polyolefin resin, an olefin-based copolymer rubber and a softening agent are further blended with optional inorganic filler to provide the olefin-based thermoplastic elastomer composition. This composition is excellent in oil resistance and extrudability, and well-adapted for use as an energy-saving, resources-saving elastomer in applications including surface or skin material in autoparts, industrial mechanical parts, electric and electronic parts, and construction materials.

Abstract: A method for treating surfaces of titanium or titanium alloys which includes the steps of applying a treatment for removing surface adhesion substances from the surface and then forming a transparent protective layer on the surface.

Abstract: There is provided a flexible printed wiring board including an insulating layer having a high optical transmittance, a high adhesion strength and a high migration resistance, and suitable for a chip on film (hereafter referred to as COF). In a flexible printed wiring board for COF, having an insulating layer on which a conductive layer of an electrodeposited copper foil is laminated, and an optical transmittance of 50% or more of the insulating layer in the etched region when a circuit is formed by etching said conductive layer, electrodeposited copper foil was made to have a rust-proofing layer of a nickel-zinc alloy on the adhering surface to be adhered to the insulating layer; the surface roughness (Rz) of the adhering surface was made to be 0.05 to 1.5 &mgr;m, and the specular gloss was made to be 250 or more when the incident angle is 60°.

Abstract: The olefin thermoplastic elastomer of the invention has an islands-sea structure, in which the average particle diameter of the islands phases is not more than 2 &mgr;m, and has a gel fraction ranging from 0.5 to 15% by weight and a quantity of heat of melt at a temperature of 125° C. or below, as measured in a different scanning calorimeter (DSC), of 40% or more of the total quantity of heat of melt. The olefin thermoplastic elastomer can be obtained by melt blending in the presence of a crosslinking agent of a specific amount a blend that contains specific amounts of: a high density polyethylene having a density of 0.940 g/cm3 or more, or a crystalline ethylene polymer having a crystallinity determined by a DSC method of 10% or more and a density of less than 0.940 g/cm3, an ethylene/&agr;-olefin(/non-conjugated polyene) copolymer rubber comprising ethylene, an &agr;-olefin of 3 to 20 carbon atoms and optionally a non-conjugated polyene, and a polypropylene.

Abstract: An olefin thermoplastic elastomer composition comprises a crystalline polyolefin resin (A) and an ethylene/&agr;-olefin/nonconjugated polyene copolymer rubber (B), and optionally a softener (C) and/or an inorganic filler (D), in a specific ratio. The copolymer rubber (B) is prepared by the use of a metallocene catalyst and comprises ethylene, an &agr;-olefin of 3 to 20 carbon atoms and a nonconjugated polyene. This composition ca provide molded products of more excellent tensile strength, elongation at break, elastomeric properties (elongation set, permanent compression set, etc.), heat resistance and low-temperature properties than the conventional non-crosslinked olefin thermoplastic elastomers, even if the composition is in the non-crosslinked form. The composition in the partially or completely crosslinked form can provided molded products of more excellent low-temperature properties, tensile strength, elongation at break and elastomeric properties than the conventional vulcanized rubbers.

Abstract: This invention relates to a thermoplastic elastomer composition which includes and comprises 10 to 60 parts by weight of a polyolefin (A), 30 to 87 parts by weight of a crosslinked rubber (B), 3 to 50 parts by weight of a softening agent (C) [the total amount of (A), (B) and (C) being 100 parts by weight] and 0.02 to 0.3 part by weight of a phenolic heat stabilizer (D) and which retains an elongation value at break by 80% or more, after aging for 500 hours in an air oven of 130° C., of the value before the aging; and relates to a manufacturing method thereof.

Abstract: A resist pattern is formed at an outermost peripheral end of the surface of a wafer. Thereafter, the back of the wafer is back-etched using chemicals to thin the wafer. A passivation film is left behind only at scribe lines for separating semiconductor chips located at the outermost peripheral end of the wafer surface and thereafter the wafer is back-etched.

Abstract: The present invention relates to an olefinic thermoplastic elastomer composition which comprises a crystalline polyolefin resin (A), an ethylene-&agr;-olefin-non-conjugated polyene copolymer rubber (B) and at least on rubber (C) selected from polyisobutylene, butyl rubber and a propylene-ethylene copolymer rubber having a propylene content of 50 mol % or more or an ethylene-&agr;-olefin copolymer (D) having a density of 0.870 to 0.

Abstract: A non-volatile memory includes a substrate: a floating gate electrode and a control gate electrode formed on the substrate; and an active layer formed around the control gate and the floating gate. The active layer has source and drain and a channel layer between the source and drain.