摘要:
A printed board (5) for mounting electronic component, a method for making the same, and an arrangement for connecting a conductive elements (8, 8′) to the printed board are provided. The printed board includes an insulating substrate (50), and at least one metal terminal (53, 54). The substrate is formed with at least one opening (51, 52) penetrating the substrate. The metal terminal is fixed to the substrate so as to bridge the opening, without projecting out of the substrate.
摘要:
A video data output device includes a memory unit which stores video data conforming with a first display mode, and a memory control unit which controls a write operation on the memory unit so that video data is written therein in the first display mode and controls a read operation thereon so that the video data is read at a timing based on the first display mode or a second display mode. Further, the video data output device includes a converter unit which converts the video data read from the memory unit at the timing based on the second display mode into video data conforming with the second display mode.
摘要:
The present invention relates to improvements on a cooling radiator for cooling a heating element by radiating and removing heat generated by a heating element, such as CPU. In a cooling radiator with a fan according to the present invention, which is used as a countermeasure against heat at the CPU in personal computers, etc., said cooling radiator comprises a bottom plate on which a plurality of protruding portions are formed, a fan to make air flow in and out, a driving motor to rotate the fan, a partition board to separate inflow air from outflow air, and a lid, and in a cooling radiator for cooling a heating element such as CPU, said cooling radiator comprises a bottom plate on which a plurality of protruding portions and a plurality of partition boards are provided, a fan to suck air and blow out air, a driving motor to rotate the fan, and a lid, wherein an inlet port to suck air and an outlet port to blow out air are provided on the sides of the cooling radiator.
摘要:
A modified polyisocyanurate foam is produced by reacting an organic polyisocyanate, a polyol and water in the presence of three catalyst, i.e. two particular trimerization catalysts and a carbodiimidation catalyst. There can be produced, without using any evaporating type blowing agent, a modified polyisocyanurate foam which is suitably used for continuous production of laminate boards, siding boards, insulation boards, etc.
摘要:
A freeze-thawing tank assembly includes an upright vessel having a hollow defined therein for accommodating therein a quantity of fluid medium to be treated. The vessel is closed at an upper end by a lid and at a lower end by a normally closed discharge valve. A plurality of double-walled structures are accommodated within the hollow of the vessel in equally spaced and parallel relation with each other. Each of the double-walled structures has a fluid passage defined therein for the flow of a heat-exchanging fluid medium and also has a fluid inlet and outlet communicated with the fluid passage. The fluid medium to be treated may be alternately frozen and thawed by passing the heat-exchanging medium through the fluid passages in the double-walled structures.
摘要:
A semiconductor device according to the invention has a channel layer, which is sandwiched by a first and a second barrier layers, and an electron supply layer for supplying the channel layer with electrons through at least one of the barrier layers. The channel layer has a superlattice structure formed by periodically repeating, in the direction of electron movement, a first and a second semiconductor material regions, each of which has a different band gap from the other. With this superlattice structure, a plurality of mini-bands are formed within a potential well, which is formed by the first and second barrier layers. Impurity concentration of the electron supply layer is so controlled that electrons may move mainly within a mini-band in which effective mass of electrons is minimum among those mini-bands. Thus, a semiconductor device having a high electron mobility in the room temperature can be obtained without requiring high purification of crystal.
摘要:
In an active pull down ECL apparatus including a current switch formed by an input transistor and a reference transistor, an emitter follower controlled by a collector voltage of the input transistor or the reference transistor, and an active pull down circuit connected to the emitter follower, a resistor is connected to an emitter of the input transistor or the reference transistor.
摘要:
A process for producing polyisocyanurate foam which comprises reacting an organic polyisocyanate with a polyol and water in the presence of a halogen-free aliphatic phosphoric ester having a molecular weight of 140 to 270 and a trimerization catalyst. Polyisocyanurate foams having good adhesion to membrane such as paper, iron, aluminium, plywood and the like can be obtained without use of an volatile blowing agent such as CFCs, HCFCs and HFCs and even at low density according to the present process.
摘要:
A document reading apparatus which can determine an effective image pickup area containing no object such as operator's hands or fingers pressing a document and rectify image data prior to imaging operation, making use of a difference of the object from the document in chromaticity, luminous density, and the like.
摘要:
An interline transfer or frame interline transfer CCD solid image sensor is adapted to read out signal charges from light receiving sections of a matrix array by means of vertical charge transfer sections and horizontal charge transfer sections. A plurality of horizontal charge transfer sections are formed for lowering the horizontal transfer frequency. The voltage transition in the transfer gate across the horizontal charge transfer sections is caused to occur stepwise or temporally slowly to improve the transfer efficiency across the horizontal charge transfer sections. A smear drain region for sweeping out unnecessary charges is formed along the horizontal charge transfer sections. The transfer electrode of the horizontal charge transfer sections connected to the busline wiring is patterned to clear contact holes provided in the smear drain region to provide for positive overflow without increasing the chip area.