Abstract:
PURPOSE: A field effect transistor having a back-gate and a method for forming the same are provided to effetely restrain an off-state leakage current and to secure a semiconductor device having excellent electrical properties. CONSTITUTION: A back-bias region(37) is formed on a substrate(11). A filling isolation layer(15) covers the substrate and the back-bias region. A body is partly overlapped with the back-bias region. A drain(47) is contacted with the body. A gate electrode(25) covers the upper and the lateral surface of the body.
Abstract:
PURPOSE: A driving method of an active type display device is provided to recover threshold voltage of a thin film transistor by applying negative bias voltage to a drain electrode of a switching transistor. CONSTITUTION: A switching transistor is connected to a pixel. Negative bias voltage is applied to the switching transistor. The negative bias voltage is applied before charging each pixel. Threshold voltage of the switching transistor is recovered. The negative bias voltage is applied to a drain electrode of the switching transistor.
Abstract:
PURPOSE: A semiconductor devices and a method of driving the same are provided to implement high integration by preventing the interference between nonvolatile memory cells. CONSTITUTION: In a semiconductor devices and a method of driving the same, a unit cell structure(1) comprises electrode layers(M1,M2), a bipolar resistance memory material film(RM1), and a unipolar resistance memory material film(RM2) The bipolar resistance memory material film and the unipolar resistance memory material film are formed between electrode layers which are opposite to each other. The bipolar resistance memory material film and the unipolar resistance memory material film are electrically serially connected. The electrode layers include resistance memory material films which are connected to conductive lines respectively.
Abstract:
An AND-type and NOR-type flash memory arrays, a manufacturing method thereof and an operating method thereof are provided to form plural same silicon pins having certain width and height on an upper portion of a substrate. A local bit line(LBL1) is connected to bit lines(BL1,BL2,BLn) via a first select transistor(ST11). Memory cells(M11 to Mm1) are connected in parallel to the local bit line and the local source line. A local source line(LSL1) is commonly connected to a source of the respective memory cells, and a common source line(CSL) is connected to the local source line via a second select transistor(ST21). A drain select line(DSL) and a source select line(SSL) are electrically connected to a gate of the first select transistor and a gate of the second select transistor. Plural word lines(WL1 to WLm) are connected to a gate of each memory cell. The local bit line and the local source line have a first doped layer and a second doped layer which are vertically spaced apart from silicon pins.
Abstract:
A semiconductor probe using an impact-ionization semiconductor device is provided to remarkably improve the limit of sensitivity of a resistive probe and easily adjust the quantity of charges capable of being detected by a probe by developing a new probe structure for easily adjusting the band energy of a source. One tilted surface of a probe is formed by an anisotropic etch process using a first etch mask pattern formed on a silicon substrate. After impurities are doped into the exposed substrate to form a first semiconductor electrode region(16), the first etch mask pattern is removed. A second etch mask pattern opposite to the direction of the first etch mask pattern is formed on the silicon substrate. Space layers are formed on the sidewalls of the second etch mask pattern. After the exposed silicon substrate is anisotropically etched to form an opposite tilted surface of the probe, the second etch mask pattern is removed. Impurities are doped into the exposed substrate to form a second semiconductor electrode region(18), and the second etch mask pattern is removed. A silicon oxide layer pattern is formed on the resultant structure by a known method. Space layers are formed on both sidewalls of the silicon oxide layer pattern. By using the space layer, a predetermined depth of the silicon substrate is etched by a photolithography process, and the space layer is removed. The first semiconductor electrode region can be a source terminal, and the second semiconductor electrode region can be a drain terminal.
Abstract:
PURPOSE: A method for fabricating a twin-ONO type SONOS memory device using a reverse self-aligning process is provided to control distribution of charges in an ONO dielectric layer by improving a SONOS memory fabrication method. CONSTITUTION: An ONO dielectric layer(500) is formed on a substrate. A buffer layer having a trench(601) is formed on the ONO dielectric layer. The ONO dielectric layer is partially exposed by the trench. The first conductive spacer(700) is formed on an inner wall of the trench. The ONO dielectric layer is divided into two parts by removing selectively the exposed part of the ONO dielectric layer. A gate dielectric layer(800) is formed on the substrate. The second conductive layer(900) is formed on the gate dielectric layer in order to fill up a gap between both sidewalls of the trench. The buffer layer is removed by using the first conductive spacer as an etch mask. The ONO dielectric layer is patterned by removing selectively the exposed part of the ONO dielectric layer.
Abstract:
Provided is a semiconductor device and a method of fabricating the same. The semiconductor device includes a substrate having first and second areas separated from each other; a structure formed on the substrate and formed by alternately laminating at least one sacrificial layer and at least one active layer; a first gate-all-around device formed in a first area and including a first nanowire; and a second gate-all-around device formed in a second area and including a second nanowire. The first nanowire is formed at the same level as that of a first active layer among the at least one active layer, and the second nanowire is formed at the same level as that of a second active layer among the at least one active layer. The first active layer is different from the second active layer.
Abstract:
PURPOSE: Semiconductor equipment is provided to increase an operation speed by including a transfer device which bidirectionally transfers a substrate. CONSTITUTION: A transfer device is located on a die attaching device and a wire bonding device. The transfer device includes a rail (210), a movable structure mounted on the rail, and a support structure mounted on the movable structure. The movable structure includes a slider (221) which moves on the rail and a driving motor (222) attached to one side of the slider. The support structure mounts a substrate (400). The support structure includes a first mounting unit (231), a second mounting unit (232), and a fixing unit (233).