Abstract:
The present invention provides a printed wiring board, an IC card module including the printed wiring board, and a method for fabricating the IC card module, for improving reliability of IC cards. The printed wiring board and the IC card module of the invention include: a base having a resin sealing region, clamped regions in a periphery zone of the resin sealing region clamped with a sealing mold, and non-clamped regions in the periphery zone; and terminals for external connection formed on the top surface of the base. The terminals are formed in a region other than any of the resin sealing region, the clamped regions, and the non-claimed regions.
Abstract:
A decimal point display circuit for use in an electronic desktop calculator, etc. which displays the result of a calculation or an entry number from the higher digits when it exceeds the number of digits in the numerical display, and displays the number of digits above the decimal point but not displayed in the numerical display by a digit mark in the numerical display. Even when the number of digits of the result of a calculation or an entry number exceeds the number of digits in the numerical display, it can be displayed in such a manner that the digits in the numerical display serve as the effective digits.
Abstract:
A target assembly of an image pick-up tube is provided which includes a stepped annular support member for a target substrate secured between a face plate and a front end portion of a tubular envelope of the image pick-up tube. The target substrate is affixed within the outwardly offset portion of the support member. The support member enables a fabrication sequence to be used which obviates exposure of the target substrate to mechanical or thermal shock during manufacture, permits the affixing material to be out of the field of view in a straightsides image pick-up tube, and furnishes automatically accurate centering of the target substrate. In combination with a softmetal sealing ring having an annular width extending from the inwardly offset portion of the support member to the inner side of a signal ring capping the face plate and the envelope, the support member also insulates the target substrate from mechanical shock during use of the image pick-up tube.
Abstract:
A method of soldering a semiconductor plate to a metal substrate comprising the steps of disposing or supplying solder at that portion of the metal substrate which is remote from the portion to be soldered with the semiconductor plate, and supplying the melted solder to the soldering portion of said semiconductor plate and said metal substrate through a groove provided in said metal substrate and extending from said remote portion to said soldering portion.
Abstract:
A method of manufacturing an MOS integrated circuit by utilizing a self-alignment technique is provided, wherein a capacitor is fabricated independently of other circuit elements. The capacitor is composed of a preliminary diffused region, a silicon dioxide layer and a gate electrode section having at least a portion thereof laid on top of the preliminary diffused region. The capacitor produced in accordance with this method is positively separated from other circuit elements and it may be used, for example, as an auxiliary storage capacitor for an inverter circuit to prevent the lowering of the output signal.
Abstract:
A chrominance amplifier circuit, adapted to be formed in a monolithic integrated circuit, in which an automatic gain control function is performed by a circuit arrangement containing no capacitor, the automatic gain control function having no influence on the bandwidth characteristic of the amplifier so that the chrominance amplification operation can be stably performed.
Abstract:
A phosphor screen for color picture tube is usually produced by the first step which comprises suspending a blue emission phosphor in an aqueous solution of photo-setting photosensitive material comprising polyvinyl alcohol and ammonium dichromate, applying thus obtained suspension to inner surface of face panel to form a photosensitive film, exposing said film through apertures of shadow mask and developing the exposed film to form dotty phosphor film and the second and the third steps of forming the dotty phosphor films of green and red emissions in this order by substantially the same procedure as that of the first step. According to the present invention, the dotty phosphor films formed at said first and second steps are treated with chromic acid solution to harden said films, whereby color mixing, namely, so-called color fogging caused by a phosphor of other color emission used at the subsequent step is reduced and color purity of emission from phosphor screen face is improved.
Abstract:
A pressure-sensitive semi-conductor device with a Schottky barrier in which a separation space is formed underneath the insulating film covering a major surface portion of the semiconductor substrate and disposed adjacent a metal layer received in a recess in the substrate and extending through an opening in the insulating film, whereby the input pressure is applied to the metal layer. The separation space is formed by side-etching with the insulating film serving as mask.
Abstract:
In making a semiconductor device comprising a die of silicon, germanium or gallium arsenide, the bonding of the die onto a metal header (i.e., holding member) is made firmly without insertion of a conventional thin gold film therebetween, by depositing gold onto the bonding face of a slice, which is to be cut into the die, in such a manner that at least the surface of the deposited layer is gold or an alloy of gold containing small amounts of an additive.