摘要:
A finishing grindstone member 20 is fixed to a spindle 10 by a bolt. In the spindle 10, there is formed a tool mounting portion 25 into which a rough grindstone member can be mounted. Into the tool mounting portion 25, there can be mounted not only the rough grindstone member but also a cover member 36. After a silicone wafer is roughly ground using the rough grindstone member, when finish grinding the silicone wafer using the finishing grindstone member 20, the cover member 36 is mounted onto the tool mounting portion 25 to thereby prevent the tool mounting portion 25 from being soiled.
摘要:
A method of slicing an ingot wherein a pre-cut work 3 in which a holding member 2 extending over the entire length of a side surface of a cylindrical ingot 1 is bonded to the side surface of the ingot 1 is set on a slicing apparatus 4, and the pre-cut work 3 is split into a multiplicity of pieces over its longitudinal direction so as to obtain disk-shaped works 5 to be ground, characterized in that a retaining member 2 is used in which a retaining layer 7 which is directly bonded to the side surface of the ingot 1 by a first adhesive agent having an adhesive strength sufficient to receive a rotating force due to a grinding apparatus 6 in a subsequent grinding process, an intermediate layer 8 which is bonded to said retaining layer 7 in a superposed manner by a second adhesive agent whose adhesive strength deteriorates more than that of the first adhesive agent under a fixed condition, and a supporting layer 11 which is connected to said intermediate layer 8 and is connected to a supporting portion 10 of said slicing apparatus 4 are integrally superposed one on top another.
摘要:
The wire saw includes a pair of reel bobbins (46,47). A strand of wire (37) is unwound from one of the reel bobbins (46,47) and wound about a plurality of cutting rollers (33,34), which constitute a cutting device (31). The wire is simultaneously wound about the other reel bobbin (47,46) while rotating the cutting rollers (33,34) to cause the wire (37) to travel. A cutting feed is applied to the wire (37) to cut the workpiece (30). The wire saw includes reel motors (48,49), which rotate the associated reel bobbins (46,47), a sensor (61,62), which detects the tension fluctuation of the wire (37), a compensating device, which alters the rotating speed of the reel motors (48,49) in correspondence with the detection data of the sensor (61,62). The wire saw further includes an altering device, which alters a compensation coefficient for altering the rotating speed of the reel motors (48,49) in correspondence with the winding diameter of the reel bobbins (46,47).
摘要:
The wire saw includes a pair of reel bobbins. A strand of wire is unwound from one of the reel bobbins and wound about a plurality of cutting rollers, which constitute a cutting device. The wire is simultaneously wound about the other reel bobbin while rotating the cutting rollers to cause the wire to travel. A cutting feed is applied to the wire to cut the workpiece. The wire saw includes reel motors, which rotate the associated reel bobbins, a sensor, which detects the tension fluctuation of the wire, compensating device, which alters the rotating speed of the reel motors in correspondence with the detection data of the sensor. The wire saw further includes an altering device, which alters a compensation coefficient for altering the rotating speed of the reel motors in correspondence with the winding diameter of the reel bobbins.
摘要:
With a laser processing apparatus, the membrane of a membrane-covered film is accurately processed with a scanning laser beam linearly both in the direction of conveyance of the film and in a widthwise direction forming an angle with the direction of conveyance simultaneously, and particles splashed or scattered from the membrane by application of the laser beam are postively removed for protection fo the film and the laser beam applying heads.
摘要:
In the wafer chamfering method, there is used a disk-shaped grindstone 8 which includes: a peripheral edge portion serving as a grinding surface 1; a flat portion formed in the central portion of the grinding surface 1 in the width direction thereof; and, two edge portions 5 respectively formed on the two sides of the flat portion 2 in the width direction thereof and made in the form of the shape of the valley portion of the notch portion 4 of a disk-shaped wafer 3 to be chamfered. In operation, in the wafer chamfering method, while rotating the above grindstone 8, the grindstone 8 is revolved in the thickness direction of the wafer 3 to thereby chamfer the wafer 3. Especially, the present wafer chamfering method comprises two steps: that is, a circumferential portion grinding step in which the grindstone is supported such that it stands upright or at right angles to the circumferential portion 6 of the wafer 3 at their respective mutual contact points and only the flat portion of the grindstone 8 is contacted with the mutual contact points to thereby chamfer the peripheral edge portion of the wafer 3; and, a notch portion grinding step in which the grindstone is supported such that it is inclined with respect to the diameter direction of the notch portion of the wafer 3 by an angle of about 45° in the circumferential direction of the wafer 3 and the edge portions 5 or both of the edge portions 5 and flat portion 2 are used to chamfer the notch portion 4 of the wafer 3.
摘要:
An aqueous working liquid composition for a wire saw comprising the following components (A) to (E): (A) 10 to 60% by weight of at least one selected from the group consisting of polyglycol ethers represented by the following formulae (I) and (II): R1-O-(CH2CH2O)n-R2 wherein R1 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or a phenyl group; R2 represents a hydrogen atom or an acetyl group; and n represents an integer of 1 to 4; (B) 0.1 to 5.0% by weight of at least one selected from the group consisting of organic bentonite and inorganic bentonite; (C) 0.01 to 5.0% by weight of at least one selected from the group consisting of carboxymethyl cellulose (CMC), MgO, methanol, and ethanol; (D) 0.1 to 2.0% by weight of at least one selected from the group consisting of a sodium beta -naphthalenesulfonate-formalin condensate and a sodium, potassium, lithium or amine salt of petroleum or synthetic sulfonic acid; and (E) 10 to 70% by weight of water, each based on the total composition weight.
摘要:
A spindle 23 of a grinding wheel 28 is rotatively borne by a bench 22 for the grinding wheel through hydrostatic thrust bearings 26 and 27. A pressure regulator 38 for regulating the pressure which must be supplied to at least either of supply ports 26a and 27a opposite to each other in the direction of the axial line of the spindle 23 in the hydrostatic thrust bearings 26 and 27 is provided. The pressure regulator 38 has a changing member for changing a passage for choking the fluid and the length of the choking passage.