摘要:
An oscillation sieve, including a screen; an oscillator oscillating the screen to sieve a material; a feeder feeding the material onto the screen; a collector collecting the material having passed the screen; a remover removing the material not having passed the screen therefrom; a guide member fixed on the screen, guiding the material fed from the feeder and not having passed the screen to the remover, wherein the guide member is spiral member formed of an elastic material capable of following the oscillating screen.
摘要:
An oscillation sieve, including a screen; an oscillator oscillating the screen to sieve a material; a feeder feeding the material onto the screen; a collector collecting the material having passed the screen; a remover removing the material not having passed the screen therefrom; a guide member fixed on the screen, guiding the material fed from the feeder and not having passed the screen to the remover, wherein the guide member is spiral member formed of an elastic material capable of following the oscillating screen.
摘要:
According to the present invention, a gettering layer is deposited both on the side surfaces and the bottom surface of a semiconductor chip. The semiconductor chip is then mounted on the board of a package so that a Schottky barrier is formed on the bottom surface. With this structure, metal ions that pass through the board of the package can be captured by the defect layer deposited on the side surfaces and/or the bottom surface of the semiconductor chip, and by the Schottky barrier.
摘要:
A semiconductor memory device includes a first anti-fuse element and a second anti-fuse element, respectively composed of a transistor, wherein the first anti-fuse element and the second anti-fuse element are configured so as to be concomitantly programmable, respectively formed in P-wells on a substrate, and the adjacent P-wells are isolated by N-wells of an opposite conductivity type, formed therebetween.
摘要:
A plasma processing apparatus includes a processing vessel capable of being vacuum evacuated; a first electrode disposed in the processing vessel in a state electrically floating via an insulating member or a space; a second electrode, arranged in the processing vessel to face and be in parallel to the first electrode with a specific interval, supporting a substrate to be processed; a processing gas supply unit for supplying a desired processing gas into a processing space surrounded by the first electrode, the second electrode and a sidewall of the processing vessel; and a first radio frequency power supply unit for applying a first radio frequency power to the second electrode to generate a plasma of the processing gas in the processing space. An electrostatic capacitance between the first electrode and the processing vessel is set such that a desired plasma density distribution is obtained for the generated plasma.
摘要:
A nonvolatile semiconductor memory device includes a substrate, a central structure, a second gate insulating film, a floating gate, and a control gate. The substrate has a trench. The central structure is formed so as to be embedded in the trench and protruded from the substrate. The second gate insulating film is formed on the substrate so as to be contact with the central structure. The floating gate is formed on the second gate insulating film. The control gate is formed so as to cover the floating gate through a insulating film;. The central structure includes an assistant gate and a first gate insulating film which is formed such that the assistance gate is surrounded with the first gate insulating film. The floating gate is formed in a side wall shape on the side surface of the central structure.
摘要:
A nonvolatile semiconductor memory includes a cell array prepared by arranging erasable and programmable memory cell transistors in rows and columns, word lines arranged in correspondence with the respective rows of the cell array and connected to the control gates of the memory cell transistors, digit lines arranged in correspondence with the respective columns of the cell array and connected to the drains of the memory cell transistors, source lines connected to the sources of the memory cell transistors, and a source power supply circuit for applying a source voltage to the source lines in an erase operation. This memory erases by the source voltage data in the memory cell transistors in the rows and columns of the cell array. The source power supply circuit is a circuit including a first P-channel transistor which sets a current to be supplied to the source lines to a predetermined value in the erase operation in a range wherein the source voltage is lower than a predetermined potential, and a second P-channel transistor which sets the current to be supplied to the source lines so as to decrease faster than the current decreased by the characteristic of the first transistor with an increase in source voltage in a range wherein the source voltage is higher than the predetermined potential.
摘要:
A method for erasing data stored in a non-volatile semiconductor memory is applied to a memory cell transistor including a p-type well region, a source and a drain formed within the p-type well region, and a composite gate including a floating gate electrode formed on the p-type well region. In the method, a plurality of pulses having a high positive voltage is applied to the p-type well region so that a product (I.times.N) of a pulse interval (I) and a number of the plurality of pulses (N) becomes not smaller than 0.1 s on condition that the control gate electrode is fixed to the ground level and the source and drain are kept at a floating state.
摘要:
A semiconductor memory device includes a first anti-fuse element and a second anti-fuse element, respectively composed of a transistor, wherein the first anti-fuse element and the second anti-fuse element are configured so as to be concomitantly programmable, respectively formed in P-wells on a substrate, and the adjacent P-wells are isolated by N-wells of an opposite conductivity type, formed therebetween.
摘要:
A non-volatile semiconductor memory device having a memory cell in which operating potentials are few and the scale of the peripheral circuitry is reduced includes a select transistor having a source/drain on both sides of a channel of a semiconductor substrate and having a gate electrode disposed on the channel via a thick gate insulating film; an element isolation region formed on the semiconductor substrate in an area adjacent to the select transistor; an antifuse adjacent to the element isolation region, having a lower electrode formed on the semiconductor substrate and having an upper electrode disposed on the semiconductor substrate in an area between the element isolation region and lower electrode via a thin gate insulating film; and a connection contact electrically connecting the source and upper electrode and contacting the source and the upper electrode.