摘要:
A MIS capacitor to be implemented in a semiconductor device employing various or predetermined circuits, has a dielectric side electrode which is in contact with a buried layer provided on a semiconductor substrate through a dielectric film and a buried layer-side electrode connected to the buried layer. The buried layer-side electrode of the MIS capacitor is connected to a low-impedance side of the circuit employed therewith. This structure, when connected as such, is capable of reducing the influence of noise attributed to an .alpha.-ray and thereby operating the circuit stably. The semiconductor device using a MIS capacitor invention is adaptable to an emitter follower circuit and various logic circuits for preventing malfunction resulting from .alpha.-ray radiation.
摘要:
A transistor circuit of this invention comprises a first transistor for receiving a first bias at its base, resistor means connected to the collector of the first transistor and clamp means connected to the junction between the first transistor and the resistor means, and obtains an output from a terminal of the resistor on the opposite to its junction with the first transistor. When a noise current due to .alpha. rays develops in the first transistor and the output is lowered, the clamp means operates in such a manner that the current flows through the clamp means and prevents the change of the output. The transistor circuit of this invention is connected to a resistor or a transistor and operates as a constant current circuit for supplying a current to the resistor or the transistor so that the current flowing therethrough becomes constant. For example, it is used as a constant current source of an emitter follower to constitute a level shift circuit. It is disposed in a feedback part and used as a constant current source in a logic circuit comprising a logic part consisting of a differential transistor circuit and the feedback part for negatively feeding back the in-phase output of the differential transistor circuit.
摘要:
An improved flip-flop circuit is provided which prevents the occurrence of soft errors due to .alpha. rays and the like emitted from a trace amount of radioactive materials contained in a semiconductor package material. The flip-flop circuit has a first logic circuit which holds data and produces a first logic signal and a second logic circuit which produces a second logic signal. A logic gate receives the first and second logic signals that are produced from the first and second logic circuits and which have the same logic level. The output of the logic gate is input to the first logic circuit through a feedback loop which is provided between the output and the input of the first logic circuit and which includes the logic gate. According to the circuit construction of the present invention, a flip-flop circuit can be accomplished which is resistant to the radioactive rays such as .alpha. rays and does not cause soft errors.
摘要:
A method of manufacturing a semiconductor integrated circuit device includes the steps of constructing a plurality of lead frames having leads which each include an inner portion and an outer portion and electrically connecting a semiconductor chip to the inner portions of the leads of each frame. The lead frames are then stacked one above each other to form a vertical stack and plates are then inserted between each of the lead frames with each plate having an opening in the center whereby a central cavity is formed in the stack. The stack is then placed between a top mold member and a bottom mold member and a resin is injected into the central cavity whereupon the resin is cured to form a single resin package encapsulating the semiconductor chips. The resin package is then released from the mold members.
摘要:
An isolation and flattening technique for a semiconductor substrate having active devices, such as a bipolar transistor, and a MISFET, formed thereon, is disclosed. The technique includes forming grooves, to the main surface of a non-active region of a semiconductor substrate or a semiconductor layer, each groove extending into the substrate or layer and forming island regions of the substrate or layer, forming a burying material and a first mask having an etching rate greater than that of the burying material successively over the entire surface of the semiconductor substrate or the semiconductor layer including areas on the upper surface of the island regions and in the grooves, such that the film thickness is made virtually uniform for each of the surfaces, forming a second mask on the surface of the first mask, through which the region on each of the island regions is exposed and in which the end of the opening is situated from the end of the island region to the outside of the island region within a distance 0.7 times of the film thickness for the sum of the burying material and the first mask, and applying isotropic etching successively to each of the first mask and the burying material by using the second mask as an etching mask, under a condition in which the etching rate for the first mask is greater than that for the burying material.
摘要:
In accordance with one aspect of the invention, a semiconductor integrated circuit is provided wherein an input circuit is formed by a phase split circuit having a bipolar transistor which outputs an inverted output from the collector and a non-inverted output from the emitter. The emitter follower output circuit is driven by an inverted output of the phase split circuit. Meanwhile, an emitter load of the emitter follower output circuit is formed by a transistor, and the emitter load transistor is temporarily driven conductively by a charging current of the capacitance to be charged by the rising edge of the non-inverted output of the phase split circuit. As a second aspect of the invention, a logic circuit is formed of a logic portion and an output portion. The output portion includes an emitter follower output transistor receiving an output signal generated by the logic portion and an active pull-down transistor receiving at its base a signal supplied thereto through a capacitance element. The signal received by the active pull-down transistor has a phase reverse to that of the input signal supplied to the base of said output transistor. Between the base and emitter of the active pull-down transistor, there is disposed a bias circuit formed of a transistor receiving at its base a predetermined bias voltage and an emitter resistor. Further, between a junction point of the emitter follower output transistor and the active pull-down transistor and the emitter of the transistor as a constituent of the bias circuit, there is disposed a capacitance element for feeding back the output signal.
摘要:
In accordance with one aspect of the invention, a semiconductor integrated circuit is provided wherein an input circuit is formed by a phase split circuit having a bipolar transistor which outputs an inverted output from the collector and a non-inverted output from the emitter. The emitter follower output circuit is driven by an inverted output of the phase split circuit. Meanwhile, an emitter load of the emitter follower output circuit is formed by a transistor, and the emitter load transistor is temporarily driven conductively by a charging current of the capacitance to be charged by the rising edge of the non-inverted output of the phase split circuit. As a second aspect of the invention, a logic circuit is formed of a logic portion and an output portion. The output portion includes an emitter follower output transistor receiving an output signal generated by the logic portion and an active pull-down transistor receiving at its base a signal supplied thereto through a capacitance element. The signal received by the active pull-down transistor has a phase reverse to that of the input signal supplied to the base of said output transistor. Between the base and emitter of the active pull-down transistor, there is disposed a bias circuit formed of a transistor receiving at its base a predetermined bias voltage and an emitter resistor. Further, between a junction point of the emitter follower output transistor and the active pull-down transistor and the emitter of the transistor as a constituent of the bias circuit, there is disposed a capacitance element for feeding back the output signal.
摘要:
Flip-flops are disposed corresponding to input circuits or output circuits of an integrated logic circuit so as to be cascaded to configure a shift register for a test and to enable a parallel transfer of data between each flip-flop and a corresponding input or output circuit. As a result, without connecting the probe to all terminals of the LSI, test signals can be supplied from some terminals via all input circuits to an internal circuit so as to conduct a diagnosis.
摘要:
Flip-flops are disposed corresponding to input circuits or output circuits of an integrated logic circuit so as to be cascaded to configure a shift register for a test and to enable a parallel transfer of data between each flip-flop and a corresponding input or output circuit. As a result, without connecting the probe to all terminals of the LSI, test signals can be supplied from some terminals via all input circuits to an internal circuit so as to conduct a diagnosis.
摘要:
A semiconductor integrated circuit wherein an input circuit is formed by a phase split circuit consisting of a bipolar transistor which outputs an inverted output from the collector and non-inverted output from the emitter, the emitter follower output circuit is driven by an inverted output of the phase split circuit, meanwhile, an emitter load of the emitter follower output circuit is formed by a transistor, and the emitter load transistor is temporarily driven conductively by a charging current of the capacitance to be charged by the rising edge of the non-inverted output of the phase split circuit.