Abstract: A method of processing a semiconductor wafer having a large number of rectangular areas sectioned by streets arranged in a lattice form on the front surface, circuits being formed in the respective areas. This method comprises the step of mounting a semiconductor wafer on a protective substrate in such a manner that the front surface of the semiconductor wafer is opposed to one side of the protective substrate having a large number of pores in at least its central area prior to the grinding of the back surface of the semiconductor wafer.

Abstract: A magnetic tape or magnetized tape is affixed to one side of a sheet-like workpiece, for example, the front surface of a semiconductor wafer. A substrate has a support area, which is at least partially formed of a porous material and is at least partially magnetized or magnetic.

Abstract: A semiconductor wafer is applied to a support disk via an intervening adhesive layer 10 with the front side of the semiconductor wafer facing the adhesive layer, which is sensitive to a certain exterior factor for reducing its adhesive force; the semiconductor wafer is ground on the rear side; the wafer-and-support combination is applied to a dicing adhesive tape with the so ground rear side facing the dicing adhesive tape, which is surrounded and supported by the circumference by a dicing frame; the certain exterior factor is effected on the intervening adhesive layer to reduce its adhesive force; and the intervening adhesive layer and support disk are removed from the semiconductor wafer or chips without the possibility of damaging the same.

Abstract: The present invention provides a cartridge life detecting system which detects and manages the life of a cartridge by mounting a memory on a print cartridge comprising at least an image formation member removably mounted on a main body of an image formation apparatus, carrying out operation to obtain information about the life of the cartridge based on contents read from the memory and criterial information of the life of the cartridge, and writing information about the life in the memory, comprises the steps of setting a value corresponding to the life of the cartridge by selecting one among combination of the number of printed sheets and the number of rotations of the image formation member, combination of the number of printed sheets and the number of pixels of image information, and combination of the number of printed sheets, the number of rotations of the image formation member and the number of pixels of image information, storing the value in the memory in advance, and making determination as to the l

Abstract: A charge removal brush with a number of long conductive filamentous elements for removing charges from an object when the charge removal brush comes in contact with the object, is disclosed. The charge removal brush includes a metal shaft rotatable about the axis thereof, a strip-like woven cloth including a base cloth and long conductive filamentous elements uniformly planted in the substantially entire surface of the base cloth, the strip-like woven cloth being spirally wound on the metal shaft with no gap, and a conductive fiber is woven into the base cloth in a state that the conductive fiber runs along the center line of the base cloth, which is extended in the lengthwise direction of the base cloth.

Abstract: A sequence control apparatus includes a control unit and a memory unit detachably mounted to the control unit. The memory unit includes a memory device connected to an input circuit and an output circuit of the control unit via a pin connector. The memory device itself conducts logical operations in response to the input signals applied to the input circuit of the control unit.