摘要:
A nonvolatile semiconductor memory with a unit cell structure suitable for high speed operation and a low power supply voltage. The nonvolatile semiconductor memory includes a switching circuit including block select transistors connected by its respective terminal to a corresponding bit line. This switching circuit transmits a signal only when a string to which the switching circuit corresponds is selected. A second active region having a different impurity concentration from a first active region constituting source and drain regions of memory transistors is formed at a substrate contact portion of a bit line contact portion where the memory string and bit line are connected. The impurity concentration of the second active region is lower than that of the first active region.
摘要:
In a liquid crystal display, a plurality of gate lines and data lines are provided on a first substrate including a display area as a screen, and a peripheral area external to the display area wherein a plurality of pixel electrodes are electrically connected to the gate lines and to the data lines, and some of the pixel electrodes extend to be located in the peripheral area; and optionally, a black matrix is formed on a second substrate disposed opposite to the first substrate for screening the extended portions of the pixel electrodes located in the peripheral area, a rubbing direction of aligning films is formed on the first and the second substrates towards the extended portions of the pixel electrodes located in the peripheral area so that impurity ions on the surface of the aligning film travel along the rubbing direction to stop at the extended portions of the pixel electrode, and an image defect area caused by the impurity ions is screened with the black matrix.
摘要:
A semiconductor memory device which is comprised of a plurality m of electrically isolated data memory sub-arrays for storing data bits and a plurality k of electrically isolated parity memory sub-arrays for storing parity bits, wherein each of the data and parity memory sub-arrays includes a plurality of memory cells arranged in a matrix of rows and columns, with the memory cells in each row connected to a common word line and the memory cells in each column connected to a common bit line. Row address decoders function to activate a selected word line in each of the memory sub-arrays, and column address decoders, in combination with column selection circuitry, function to couple a selected bit line in each of the memory sub-arrays to a plurality m of sense amplifiers, which function to sense the voltage level of respective ones of the selected bit lines, and produce output data and parity bits representative of these sensed voltage levels. An error checking and correction circuit compares the output data and parity bits in order to detect and correct errors in the output data bits. Because of the unique architecture of the semiconductor memory device of this invention, defects in word lines or bit lines are confined to a single bit, thereby rendering these defects easily reparable by means of an ECC circuit alone, and thus dispensing with the need for a redundant memory circuit.
摘要:
In a liquid crystal display, a plurality of gate lines and data lines are provided on a first substrate including a display area as a screen, and a peripheral area external to the display area wherein a plurality of pixel electrodes are electrically connected to the gate lines and to the data lines, and some of the pixel electrodes extend to be located in the peripheral area; and optionally, a black matrix is formed on a second substrate disposed opposite to the first substrate for screening the extended portions of the pixel electrodes located in the peripheral area, a rubbing direction of aligning films is formed on the first and the second substrates towards the extended portions of the pixel electrodes located in the peripheral area so that impurity ions on the surface of the aligning film travel along the rubbing direction to stop at the extended portions of the pixel electrodes, and an image defect area caused by the impurity ions is screened with the black matrix.
摘要:
In a liquid crystal display, a plurality of gate lines and data lines are provided on a first substrate including a display area as a screen, and a peripheral area external to the display area wherein a plurality of pixel electrodes are electrically connected to the gate lines and to the data lines, and some of the pixel electrodes extend to be located in the peripheral area; and optionally, a black matrix is formed on a second substrate disposed opposite to the first substrate for screening the extended portions of the pixel electrodes located in the peripheral area, a rubbing direction of aligning films is formed on the first and the second substrates towards the extended portions of the pixel electrodes located in the peripheral area so that impurity ions on the surface of the aligning film travel along the rubbing direction to stop at the extended portions of the pixel electrodes, and an image defect area caused by the impurity ions is screened with the black matrix.
摘要:
A polysilicon gate electrode of an integrated circuit field effect transistor is formed in two portions which are isolated from one another. The first portion is formed on the gate insulating region. The second portion is formed on the semiconductor substrate outside the gate insulating region and is electrically insulated from the first portion. Since the first and second portions of the polysilicon gate electrode are isolated from one another, only the charge which is on the first polysilicon portion contributes to gate insulating region degradation during plasma etching. After polysilicon gate electrode formation, the first and second portions may be electrically connected by a link. Field effect transistor performance and/or reliability are thereby increased.
摘要:
A semiconductor integrated circuit having an address transition detector includes a power detecting circuit connected to a source terminal for detecting a voltage level of the source terminal, a pulse generating circuit for receiving an address signal and generating a pulse when the address signal is changed, and a summator for combining outputs of the power detecting circuit and the pulse generating circuit and generating a given pulse when the outputs vary.
摘要:
In a liquid crystal display, a plurality of gate lines and data lines are provided on a first substrate including a display area as a screen, and a peripheral area external to the display area wherein a plurality of pixel electrodes are electrically connected to the gate lines and to the data lines, and some of the pixel electrodes extend to be located in the peripheral area; and optionally, a black matrix is formed on a second substrate disposed opposite to the first substrate for screening the extended portions of the pixel electrodes located in the peripheral area, a rubbing direction of aligning films is formed on the first and the second substrates towards the extended portions of the pixel electrodes located in the peripheral area so that impurity ions on the surface of the aligning film travel along the rubbing direction to stop at the extended portions of the pixel electrode, and an image defect area caused by the impurity ions is screened with the black matrix.
摘要:
A nonvolatile semiconductor integrated circuit having a cell array consisting of a plurality of memory strings each having first to N-th (N=2, 3, 4, . . . ) memory cell transistors of a NAND structure includes a plurality of first string select transistors connected in series to the first memory cell transistor, and a plurality of second string select transistors connected in series to the N-th memory cell transistor. One of the string select transistors serially connected to the first and N-th memory cell transistors has a control terminal connected to a ground connecting point, thus to have a ground select function as well as a string select function.
摘要:
A mask ROM having a defect repairing function stores address signals corresponding to a defective memory cell and then, selectively activates either a redundancy row decoder or a row decoder according to whether the address signals stored are identical to address signals supplied externally. The mask ROM includes first and second memory cell arrays formed by grouping in a word line direction a plurality of read only memory cells arranged in rows and columns; first and second row decoders for combining row address signals supplied externally so as to selectively drive the word lines of the first and second memory cell arrays; and a row decoder selector for storing therein address signals according to a row block including a defective memory cell, of the first memory cell array so as to inactivate the first row decoder and activate the second row decoder when the external row address signals are equal to the address signals stored in the row decoder selector.