摘要:
A packing bag structure formed of inner and outer bag members made of synthetic resin inner and outer films having different moisture permeabilities enables easy-to-dry moist foods or other perishable products to be packed in a suitable state and stored in a non-soggy and untarnished condition. The inner film has moisture permeability of 9 to 200 g/(m2·24 h), preferably 20 to 30 g/(m2·24 h), and the outer film has moisture permeability of 4 to 15 g/(m2·24 h), preferably 7 to 10 g/(m2·24 h). The packing bag is produced by folding a long film sheet formed of the inner and outer films into two, having an article such as food placed between the twofold film sheet, thermally sealing the film sheet by using an end sealer and cutting off the packed and sealed portion.
摘要:
A brushless motor capable of increasing energy density by effective utilization of reluctance torque. The brushless motor comprises a stator (5) and a rotor (1) having a lateral surface opposed to the stator (5). The stator (5) comprises a plurality of radially extending iron cores (10) and a plurality of windings (11) for generating a magnetic field in each iron core (10). The rotor (1) comprises a plurality of permanent magnets (2) and a magnetic field line inducing body disposed between each permanent magnet (2) and the lateral surface.
摘要:
A magnetic disk includes a substrate, a magnetic layer, and a protective layer. At least one region of a surface of the magnetic disk has protrusions. A height of each of the protrusions is not less than 5 nm and not greater than 40 nm, and is within ±30% of an average height of the protrusions. A density of the protrusions is not less than 200/mm2 and is not greater than 250,000/mm2. A width of a surface of each of the protrusions in a radial direction of the magnetic disk is not less than 0.1 &mgr;m and is not greater than 10 &mgr;m. The protrusions are discrete protrusions aligned in a spiral direction of the magnetic disk at a predetermined spacing in the radial direction of the magnetic disk. The at least one region of the surface of the magnetic disk includes flat areas between the protrusions. At least some of the flat areas extend continuously from an inner redius of the at least one region of the surface of the magnetic disk to an outer radius of t he at least one region of the surface of the magnetic disk.
摘要:
A magnetic disk has a magnetic layer and a protective layer disposed on the magnetic layer. A multiplicity of lands having sizes within a predetermined range of sizes and generally equal heights within a predetermined range are formed on the surface of the protective layer at a density within a predetermined range. The lands serve to effectively remove contaminants attached to the floating surface of a magnetic head to ensure a desired sliding reliability and floating stability of the head during a long period of time even in the case of a high-density magnetic disk apparatus in which the extent of floating of the head is small. The reliability with which the magnetic disk apparatus operates is thereby improved. The lands are formed on the surface of the protective layer by a process of forming a mask of fine particles on the protective layer surface and etching the protective layer surface through this mask.
摘要:
A method of forming projections on major surfaces of a disk comprises the steps of supporting the disk in a space, spraying a multiplicity of fine solid particles into the space, charging the sprayed fine solid particles with electricity of the same polarity so that the fine solid particles are floating in the space in a mutually separated state due to electric repellent forces acting between the fine solid particles, electrostatically depositing the fine solid particles charged with electricity on the surfaces of the disk, and etching the disk surfaces by using the deposited fine solid particles as masks, thereby forming a multiplicity of projections on the disk surfaces.
摘要:
A method of producing a magnetic disk by lapping a magnetic disk medium, comprising the steps of:preparing a lapping tape having an abrasive particle layer provided with abrasive particle clusters and chip pockets formed between adjacent two clusters, each of said clusters having abrasive particles of Al.sub.2 O.sub.3 or SiC and abrasive particles of diamond,lapping the surface of said magnetic disk medium by using the thus prepared lapping tape.
摘要:
A method of manufacturing a paint composite for magnetic films wherein a mixture consisting of a magnetic powder, a polymer such as polyvinylbutyral, and a solvent is ground under a shear stress of 10-400 kg/cm.sup.2, and the ground mixture has a solvent, an epoxy resin and a phenol resin added thereto and is further ground. When a magnetic disk is produced using a paint which has been obtained by executing the first grinding under a shear stress of 10-400 kg/cm.sup.2 with a kneader or the like, it is endowed with excellent electric characteristics and surface flatness.
摘要翻译:制造用于磁性膜的涂料复合物的方法,其中将由磁性粉末,聚乙烯醇缩丁醛等聚合物和溶剂组成的混合物在10-400kg / cm2的剪切应力下研磨,并且研磨的混合物具有溶剂, 加入其中的环氧树脂和酚醛树脂,并进一步研磨。 当使用通过使用捏合机等在10-400kg / cm 2的剪切应力下执行第一次研磨而获得的涂料制造磁盘时,具有优异的电特性和表面平坦度。
摘要:
According to embodiments, a semiconductor device includes a semiconductor substrate and an element isolation insulating film which isolates a element formation region in a surface portion of the semiconductor substrate. A depletion-type channel region of a first conductivity type is formed in an inner region which is in the element formation region of the semiconductor substrate and is a predetermined distance or more away from the element isolation insulating film. A gate electrode is formed above the element formation region with a gate insulating film located in between in such a manner as to traverse over the channel region and to overlap with portions of the element isolation insulating film which are located on both sides of the element formation region. Source/drain regions of the first conductivity type are formed in the channel region respectively on both sides of the gate electrode.
摘要:
According to an embodiment, a semiconductor memory device includes a plurality of multi-level memory cells provided on a major surface of a semiconductor substrate of a first conductivity type. A first semiconductor region of a second conductivity type is selectively provided in the surface of the semiconductor substrate between the multi-level memory cells. A second semiconductor region is provided deeper than the first semiconductor region and includes a first conductivity type impurity. A plurality of binary memory cells are provided on the major surface of the semiconductor substrate, and a third semiconductor region of the second conductivity type is selectively provided in the surface of the semiconductor substrate between the binary memory cells. Amount of the first conductivity type impurity compensating a second conductivity type impurity of the first semiconductor region is larger than that of the third semiconductor region.
摘要:
A magnetic recording medium includes a non-magnetic substrate, and a magnetic layer provided on the non-magnetic substrate. The value of the product Br.sub.1 .delta. of the residual flux density Br.sub.1 of the magnetic layer determined in a recording direction and the thickness .delta. of the magnetic layer is not less than 5 G.mu.m and not more than 180 G.mu.m; the value of the ratio of Br.sub.1 to the residual flux density Br.sub.2 determined in a direction parallel to the substrate plane and perpendicular to the recording direction, Br.sub.1 /Br.sub.2, is not less than 1.3 and not more than 3; the surface of the non-magnetic substrate has texture grooves therein extending predominantly in the recording direction; and the average roughness factor Ra of the surface of the magnetic layer determined in a direction perpendicular to the substrate plane and perpendicular to the recording direction is not less than 0.3 nm and not more than 1.9 nm. Alternatively, the value of the product Br.delta. of the residual flux density Br of the magnetic layer determined in the recording direction and the thickness .delta. of the magnetic layer is not less than 5 G.mu.m and not more than 80 G.mu.m; and the value of the anisotropic magnetic field H.sub.k of the magnetic recording medium is not less than 7 kOe and not more than 20 kOe.