Abstract:
A flash memory card includes one or a plurality of flash memories and a controller having an interface connected to a host computer to store card attribute information to be presented to the host computer at a predetermined storage position in the flash memory.
Abstract:
Disclosed is a method of manufacturing a semiconductor device which includes a source region, a channel region, a drain region, a gate electrode formed on the channel region through a gate insulating film 6 and a drift region (N− layer 22) formed between the channel region and the drain region, wherein the process of forming the drift region (N− layer) comprises the steps of: ion-implanting and diffusing at least two kinds of second conduction type impurities (e.g. phosphorus and arsenic ions) having different diffusion coefficients in a P-type well region 21; ion-implanting at least one kind first conduction type impurities (e.g. boron ions) having a diffusion coefficient substantially equal to or larger than that of at least one of said second conduction type impurities (e.g. phosphorus); and diffusing the first conduction type impurities after the gate insulating film 6 has been formed.
Abstract:
A disc cassette has a case in which a disc-like recording medium is rotatably received. The case has an opening through which at least a part of the recording medium is exposed. A rectangular recess is formed on a front area of the case where the opening is positioned. The recess is defined by two opposed side walls, a back wall and a bottom wall. The back wall faces forward. A shutter is slidably engaged with the recess in a manner to selectively open and close the opening. The shutter is slidable in a direction parallel with the direction in which the back wall extends. The back wall of the rectangular recess has a surface which is inclined relative to the bottom wall.
Abstract:
A disk cartridge is formed with a slidably mounted metallic shutter for opening and closing a disk access opening formed in the cartridge shell. A stock roll material for forming the shutter is formed of a sheet of metallic base material, such as aluminum, to which upper and lower film layer are applied. The upper film layer is formed of synthetic resin including a lubricant component and a coloring agent while the lower film layer is formed of a synthetic resin which is harder than that of the first film layer and to which no lubricant or coloring is added. The stock material is introduced to punching and bending processing apparatus such that the upper lubricant containing film layer contacts the punch die such that press oil need not be used during fabrication. Bending processing is carried out such that a U-shaped shutter is formed having the lubricant containing film layer at an inner surface thereof, and the harder lower film layer forms the outer surface. Thus, the outer surface resists abrasion and flawing and may be printed upon with good results, while the inner lubricated layer assures smooth sliding of the shutter and eliminates the need for applying and removing press oil during manufacture. The color applied to the lubricated film layer assures that the stock may always be correctly oriented at the initial stage of processing.
Abstract:
A recording medium storage cassette includes a cassette housing composed of an upper cassette shell and a lower cassette shell and in which a part of an outer ornamented body of the cassette is formed of a metal plate member made by press-treatment.
Abstract:
A method and apparatus for thermal transfer of a picture pattern or a letter on a printing surface of a material formed of metal or ceramics exhibiting high heat dissipating properties. The thermal transfer apparatus, by which the thermal transfer method may be carried out, includes a holding unit for holding the material and having a heater for heating the material, a thermal transfer head for heating the thermal transfer film for transferring the printing layer onto the material, a cooling unit for cooling the thermal transfer film, a peeling unit for peeling the base film of the thermal transfer film, and a control unit for pressing the thermal transfer head against the thermal transfer film as the material is heated by the heater for transferring the printing layer onto the material. The control unit causes the thermal transfer film to be cooled by the cooling means after separation of the thermal transfer head from the thermal transfer film. The control unit also causes the peeling unit to peel the base film off from the material.
Abstract:
A lens system includes a master lens system and a conversion lens system. The master lens system has a first lens, a second lens, a third lens, and a fourth lens, which are sequentially arranged from an object side of the lens system to an image side thereof, and has a first diaphragm which is arranged between the third lens and the fourth lens. The first lens is a positive meniscus lens having a convex surface toward the object side. The second lens is a negative lens. The third lens is a positive lens. The fourth lens is a negative meniscus lens having a concave surface toward the object side. The conversion lens system is arranged in such a manner that the conversion lens system can be freely inserted and removed between the third lens and the fourth lens of the master lens system. When the conversion lens system is inserted and removed between the third lens and the fourth lens, relative positions of the respective first, second, third and fourth lenses are fixed, and a focal length of the lens system becomes shorter than a focal length of the master lens system.
Abstract:
The present invention provides a method of manufacturing a shutter to be slidably put on a protective envelope for containing a flexible disk. The method comprises cambering a flat metal strip, punching-out a blank having a shape corresponding to the development of the shutter from the cambered metal strip, and folding the blank along folding lines perpendicular to the cambered edges of the blank in a substantially U-shape. The shutter thus manufactured has opposite side walls cambered away from each other, and an end wall connecting the opposite side walls. The cambered opposite side walls of the shutter will neither diverge nor converge and the distance between the edges of the opposite side walls in sliding contact with the outer surfaces of the side walls of the protective envelope is maintained constant, so that the edges of the opposite side walls of the shutter in sliding contact with the outer surfaces of the side walls of the protective envelope do not rise from the outer surfaces of the side walls of the protective envelope.
Abstract:
A compact zoom lens has a first lens group having a negative focal length f.sub.1 ; a second lens group having a positive focal length f.sub.2 ; and a third lens gorup having a negative focal length f.sub.3. The first, second and third lens groups are sequentially arranged from an object side of the zoom lens to an image side thereof. The first to third lens groups are moved on the object side while the mutual distances between the first, second and third lens groups are changed to perform a zooming operation from a wide angle side to a telescopic side. The third lens group is constructed by positive, negative and positive lenses sequentially arranged from the object side to the image side such that the negative and positive lenses respectively constituting the second and third lenses are joined to each other. The focal lengths f.sub.1, f.sub.2, f.sub.3 and a focal length f.sub.w of an entire lens system at a wide angle end of the zoom lens satisfy the following conditions.0.3 .nu..sub.3P The third lens group may be constructed by positive, negative, positive and negative lenses sequentially arranged from the object side to the image side.