Toray Industries, Inc.

Toray Battery Separator Film Co., Ltd.

Elmo Company, Limited

Ken Shimizu

Naoki Mizuno

Michihiko Irie

Masayuki Tanaka

Masanori Nakamura

Yasushi Sawamura

Koichi Matano

Yasuaki Tsutsumi

Atsuto Tokunaga

Mayumi Kawada

Ryuichi Kamei

Mikihiro Ogura

Syouji Kigoshi

Masami Tokunaga

A laminated porous membrane includes a polyolefin porous membrane, on one surface of which projections that are made of a polyolefin and satisfy 5 &#x3bc;m&#x2264;W&#x2264;50 &#x3bc;m (W: projection size) and 0.5 &#x3bc;m&#x2264;H (H: projection height) are irregularly scattered at a density of 3/cmto 200/cm, and a modifying porous layer laminated on the surface of the polyolefin porous membrane having the projections, wherein the modifying porous layer includes a binder with a tensile strength of at least 5 N/mmand inorganic particles.

Laminated porous membrane, process for manufacturing same and separator for battery

A battery separator includes a porous membrane A including a polyolefin resin, and a porous membrane B laminated thereon including a fluororesin and inorganic particles or cross-linked polymer particles,

Battery separator, and method for producing same

A battery separator includes a porous membrane A including a polyethylene resin, and a porous membrane B laminated thereon including a heat resistant resin and inorganic particles or cross-linked polymer particles, wherein the porous membrane A satisfies expressions (a) to (c), and the entire battery separator satisfies expressions (d) to (f).

Battery separator, and battery separator manufacturing method

A battery separator includes a porous membrane A with a thickness of less than 10 &#x3bc;m including a polypropylene resin, and a porous membrane B laminated thereon including a heat resistant resin and inorganic particles or cross-linked polymer particles, wherein the porous membrane A satisfies a specific range of thickness, average pore size, and porosity, and the entire battery separator satisfies a specific range of thickness, peeling strength at the interface between the porous membrane A and the porous membrane B, and difference in air resistance between the entire battery separator and the porous membrane A.

The zoom lenscomprises, sequentially from the object side, a stationary first lens grouphaving positive refractive power; a second lens group, having negative refractive power, and that moves on the optical axis when changing the magnification; a stationary third lens groupthat has positive refractive power; and a fourth lens group, having positive refractive power. The first lens groupcomprises six lenses. The second lens Lis a meniscus lens that is formed so as to have at least one aspherical surface. The aspherical surface of the second lens Lis formed at the shape wherein there is no displacement in the thickness from the center portion to the edge portion. Doing so enables the effective correction of distortion and off-axis aberration on the wide-angle side, and the provision of a high-performance zoom lens that is small and has a high variable magnification.

Zoom lens

The present invention relates to an adhesive-backed tape for semiconductors which is characterized in that it is composed of a laminate of an insulating film layer having the following characteristics (1) and (2) and at least one adhesive agent layer in the semi-cured state. By means of this construction the present invention can provide, on an industrial basis, an adhesive-backed tape suitable for producing semiconductor devices, together with copper-clad laminates, semiconductor connecting substrates and semiconductor devices employing said tape, and it enables, the reliability of semiconductor devices for high density mounting to be enhanced.

Growing community of inventors

Nasushiobara, Japan

Ken Shimizu