摘要:
A semiconductor integrated circuit includes a p-type well region (22) formed on an n-type semiconductor substrate (21). A hole extends from the surface of said p-type well region (22) to the substrate (21) and an intrinsic or lowly doped semiconductor (27) is buried through an insulating film (26) in said hole. This semiconductor (27) is used as a resistor.
摘要:
A semiconductor memory wherein a semiconductor substrate (1) includes a well (3) of selected depth and of a conductivity type opposite to that of the substrate, a MOS transistor circuit constituting a memory cell formed in the surface region of the well and having information storage nodes the lower part of which is covered with an impurity region (30, 40, 56) of the same conductivity type as the well and being shallower in depth and higher in impurity concentration than the well.
摘要:
This invention relates to a protection device of a semiconductor device. The present invention can prevent the drop of a gate breakdown voltage due to miniaturization of a device without impeding the high speed performance of the circuit attached thereto. The invention improves the voltage, that can be applied to the input terminal (51) of the device, by reducing the surface breakdown voltage of a surface breakdown type MOS transistor (43), which is a principal member of a protection device, and reducing the resistance after the breakdown. This can be accomplished, for example, by increasing the concentration of a region (50) in which the MOS transistor (43) is disposed, by reducing the depth of the region, and so forth.
摘要:
in a semiconductor memory having memory cells, a groove (17) is formed in a semiconductor substrate (10), and a semiconductor layer (20) is charged into said groove (17) via an insulating film (18) to form a capacitor electrode. The semiconductor layer (20) stretches on the insulating film (11) formed on the semiconductor substrate (10) and comes into contact with the substrate (10) passing through a hole formed in the insulating film (11) thereby to form a base portion of a switching MOS transistor. The source and drain regions (151, 152) of the transistor are formed on said semiconductor layer on the insulating film (11).
摘要:
To the ends of avoiding an abnormal phenomenon such as latch-up attributed to a parasitic element and of enhancing the density of integration, a groove-like insulator layer (20) extending in the depthwise direction of a semiconductor body (1) is formed at a boundary part between a well region (2) and the semiconductor body (1). Owing to the insulator layer (20), conductive regions which would constitute the parasitic element are separated apart, so that the latch-up phenomenon does not arise. Therefore, the area of the well region (2) can be made small, and the density of integration can be made 1.4 times higher than in prior-art LSI circuits.
摘要:
In a memory comprising a memory device (24), a voltage generation circuit (6) converts a power source voltage supplied from an external device and generates a substrate bias voltage. The external device serves to read from, and write into, said memory device (24) and to supply operation power to said memory device (24). Further provided are a first battery (17c) for supplying said substrate bias voltage to said memory device (24) and a second battery (17a, 17b) for supplying power to said memory device (24), when the operating power is not supplied from said external device.
摘要:
This invention relates to a protection device of a semiconductor device. The present invention can prevent the drop of a gate breakdown voltage due to miniaturization of a device without impeding the high speed performance of the circuit attached thereto. The invention improves the voltage, that can be applied to the input terminal (51) of the device, by reducing the surface breakdown voltage of a surface breakdown type MOS transistor (43), which is a principal member of a protection device, and reducing the resistance after the breakdown. This can be accomplished, for example, by increasing the concentration of a region (50) in which the MOS transistor (43) is disposed, by reducing the depth of the region, and so forth.
摘要:
A semiconductor integrated circuit includes a p-type well region (22) formed on an n-type semiconductor substrate (21). A hole extends from the surface of said p-type well region (22) to the substrate (21) and an intrinsic or lowly doped semiconductor (27) is buried through an insulating film (26) in said hole. This semiconductor (27) is used as a resistor.
摘要:
In a memory comprising a memory device (24), a voltage generation circuit (6) converts a power source voltage supplied from an external device and generates a substrate bias voltage. The external device serves to read from, and write into, said memory device (24) and to supply operation power to said memory device (24). Further provided are a first battery (17c) for supplying said substrate bias voltage to said memory device (24) and a second battery (17a, 17b) for supplying power to said memory device (24), when the operating power is not supplied from said external device.