摘要:
To achieve a high-speed and reliable read operation. A unit cell is constituted by a select gate 3 provided in a first region and on a substrate 1 with an insulating film 2 interposed inbetween, a floating gate 6a provided in a second region adjacent to the first region with an insulating film 5 interposed inbetween, a diffusion region 7a provided in a third region adjacent to the second region and on the surface of the substrate, and a control gate 11 provided on the top of the floating gate 6a with an insulating film 8 interposed inbetween. Each data bit is stored using corresponding first unit cell and second unit cell.
摘要:
A nonvolatile memory device includes source and drain regions formed in a semiconductor substrate, and an insulating film formed on a channel region between the source region and the drain region in the semiconductor substrate. The nonvolatile memory device also includes a dielectric film formed above the channel region to store electric charge, and a control gate formed on the dielectric film. Compressive stress in the channel region is equal to or less than 50 MPa.
摘要:
Disclosed is a semiconductor storage device having a trench around a bit-line diffusion region in an area of a p-well, which constitutes a memory cell area, that is not covered by a word line and a select gate that intersects the word line. An insulating film is buried in the trench.
摘要:
An apparatus for testing a defect, includes a semiconductor element. In the semiconductor element, a conductive film is formed on an STI (shallow trench isolation) insulating film, which fills a shallow trench extending into a semiconductor region, through an insulating film in an ordinary state, and the shallow trench is not completely or sufficiently filled with the STI insulating film in a defective state. Also, the apparatus includes a control circuit configured to set a test mode in response to a test mode designation signal, a first voltage applying circuit configured to output a first voltage to the conductive film in the test mode, and a second voltage applying circuit configured to output a second voltage to the semiconductor region in the test mode. The first voltage is higher than the second voltage, and a voltage difference between the first voltage and the second voltage is sufficient to cause breakdown between the conductive film and the semiconductor region in the defective state.
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 nonvolatile memory device includes source and drain regions formed in a semiconductor substrate, and an insulating film formed on a channel region between the source region and the drain region in the semiconductor substrate. The nonvolatile memory device also includes a dielectric film formed above the channel region to store electric charge, and a control gate formed on the dielectric film. Compressive stress in the channel region is equal to or less than 50 MPa.
摘要:
A semiconductor memory device comprises diffusion regions, a floating gate, a third diffusion region, a selection gate electrode, and a control gate electrode that three-dimensionally crosses the selection gate electrode and extends in a direction orthogonal to the selection gate electrode are included. A channel formed immediately below the selection gate and which constitutes a passage connecting the two diffusion regions has a shape in a top view, including a first path extending in one direction, from one diffusion region, and a second path extending from the end of the first path to the other diffusion region in a direction orthogonal to a first direction.
摘要:
A semiconductor device including memory cells isolated by a trench that may be self aligned with a stacked film pattern (7) has been disclosed. The memory cells may be flash memory cells having an active gate film (2) that may be thinner than a gate oxide film (30). The active gate film (2) may be located in a central portion under of a gate electrode (3). The gate oxide film (30) may be located under end portions of the gate electrode (3). In this way, a distance between a shoulder portion of a trench (11) and a gate electrode (3) may be increased. Thus, an electric field concentration in the shoulder portion of the trench (11) may be decreased and memory cell characteristics may be improved.
摘要:
In a flash memory that has a floating gate, a control gate, and an erase gate that are all mutually insulated, in which data erasing is performed by extracting electrons from the corner edge of the floating gate to the erase gate via an insulation film, the insulation film between the floating gate and the erase gate is formed so as to have a uniform thickness at its corner part.
摘要:
A semiconductor device has a construction in which a gate dielectric film is formed on the surface of a semiconductor substrate having source regions and drain regions, a plurality of FG (Floating Gates) are formed on the gate dielectric film, an intergate dielectric film is formed on the FG, and CG (Control Gates) are formed on the intergate dielectric film. Mounds are formed on both sides of the FG. An interlayer dielectric film is formed between the gate dielectric film and the intergate dielectric film and covering these mounds. The FG are constituted by upper FG and lower FG, and the upper FG are formed to spread toward the areas where the mounds are formed and cover a portion of the interlayer dielectric film. The gate dielectric film is formed in a shape that does not rise in a direction that is substantially perpendicular to the surface of the semiconductor substrate at least above the upper FG.