摘要:
The invention provides an in-line electron gun in which first astigmatic lens fields that are convergent in a horizontal direction and divergent in a vertical direction are produced between a first focusing grid and a second focusing grid, and second astigmatic lens fields that are divergent in a horizontal direction and convergent in a vertical direction are produced upstream of the first focusing grid. The lens magnifications in both horizontal and vertical directions can be made substantially equal, so that it is possible to achieve a satisfactory resolution over the entire area of the phosphor screen and also to prevent moire occurrences.
摘要:
In a semiconductor IC, a diode and a resistor for surge protection are integratedly formed in a p-type common island region laterally isolated from a p-type epitaxial layer by oxide film, by forming an n-type region of high impurity concentration to reach down to an n-type buried region and a resistor region, respectively; the IC has higher integration and larger junction area of the diode, and achieve better surge protection.
摘要:
The present invention relates to a cathode ray tube apparatus which can reduce an astigmatism caused from the deflection distortion by providing its focusing grid in two parts and producing a dynamic focusing lens of a quadrupole between the opposing faces of the two focusing grid parts. One focusing grid preferably has vertically disposed oblong through holes, while the other focusing grid preferably has one or more horizontally disposed oblong through holes.
摘要:
A solid state image sensing device which transfers unnecessary signal charges accumulated at photoelectric conversion devices by a first charge pulse in a vertical blanking period to vertical transferring means and throws out the unnecessary signal charges using throw-away means. The necessary signal charges accumulated in the photoelectric conversion devices in such period after the first charge pulse are transferred by a second charge pulse to the vertical transferring means, a horizontal transferring means and a signal detecting means, thereby to issue a video signal.
摘要:
In an FET, two first semiconductor regions of higher impurity concentration and smaller thickness, for source electrode and drain electrode, are formed in a second semiconductor region of lower impurity concentration and larger thickness for a gate electrode, thereby obtaining a low source resistance and small leak current.
摘要:
A pair of magnetic member for collecting leakage magnetic flux of barrel-shaped vertical deflection magnetical flux to produce an auxiliary vertical deflection magnetic field of pin-cushion type around the neck of a cathode ray tube at the part of the electron gun, wherein each magnetic member has a vertical principal face part which is to face in parallel to a vertical principal face part of the other magnetic member with regard to a vertical axis of the CRT, and a pair of bar-shaped member, that is an upper horizontal bars and a lower horizontal bars connected to the upper edge part and the lower edge part of the principal plane part and extending toward the neck of the cathode ray tube; the provision of the above-mentioned magnetic members on a deflection yoke of a color cathode ray tube decreases convergence coma and coma distortion of beam spots, and is suitable for producing color picture image with good color convergence, in especially large face wide deflection type color cathode ray tube.
摘要:
A process is described for forming semiconductor device which include forming step of coating of silicon oxide derivative before ion implanting step: The coating prevents unnecessary extention of channel stop regions thus produces high speed and high current drive ability of produced semiconductor device.
摘要:
A memory apparatus has a dummy cell comprising two sets of series connections of MOS transistors and capacitors, respectively, connected to a pair of bit lines, which are connected to a sense amplifier of a flip-flop type, and a third MOS transistor having a source and a drain thereof connected between junction points of the MOS transistors and the capacitors of the dummy cell. The capacitors are charged at a high level potential and a low level potential, respectively, of the bit lines and then they are shorted to each other through the third MOS transistor so that they have a common potential of a middle potential level. The potential of the middle level can be supplied to a pair of input terminals to the flip-flop type sense amplifier as a reference potential signal. Thus, it is possible to assure a stable sensing operation by the sense amplifier which is free from an influence of a change in the potential of a substrate of the memory apparatus.
摘要:
In a method of manufacturing a semiconductor device, a thin silicon dioxide (SiO.sub.2) film for a gate insulation film and a polycrystalline silicon layer are successively deposited on a semiconductor substrate having one electrical conductivity type whereby this polycrystalline silicon layer has a gate electrode pattern. In this step a part of the polycrystalline silicon layer is left at a part where an electric contact with the substrate is to be formed. Parts of source and drain regions are formed by the self-align method with this polycrystalline silicon layer as a mask. A thick passivation film for an interlayer insulation film is formed to cover the whole surface. An aperture is formed selectively in the passivation film to expose the whole polycrystalline silicon layer at the part where the contact is formed. The polycrystalline silicon layer in the aperture part and the thin insulation film thereunder are removed to expose a part of the semiconductor substrate. An impurity is introduced into this exposed part to form a contact region overlapped with a part of the above-mentioned source and drain regions. Therefore, the aperture part for a contact with source and drain regions can be formed without a step of mask adjustment. Thus, a highly integrated function device can be easily realized.
摘要:
In a deflection means 11 having a field of pin-cushion type flux distribution, at least a pair of T-shaped magnetic pole pieces 9, 10 are disposed between the front end of an electron gun 2 and the center part of the deflection means 11, thereby to form a barrel type flux distribution, to attain high resolution even at peripheral part of the fluorescent screen.