摘要:
A method for manufacturing a semiconductor device or a semiconductor wafer is provided, in which a removal of slurry that is adherently remained on the back surface of the semiconductor wafer can be ensured without a need for employing an increased dimension of apparatus. An edge portion of a semiconductor wafer is polished while a back surface of the semiconductor wafer is chucked to a chucking unit of a first polishing unit, and then, the polished semiconductor wafer is dechucked from the chucking unit of the first polishing unit. Next, a predetermined gap is formed in a location above the chucking unit of the second polishing unit, and the semiconductor wafer is disposed therein. Water is discharged form the chucking unit of the second polishing unit to clean the back surface of the semiconductor wafer W. Thereafter, the back surface of the semiconductor wafer is chucked to the chucking unit of the second polishing unit, and then the semiconductor wafer is polished.
摘要:
A magnetic head comprises a pole layer, a shield layer, a gap layer disposed between the pole layer and the shield layer, and a coil. The shield layer incorporates: a first layer disposed on the gap layer; a second layer disposed on the first layer; and a third layer disposed on the second layer. The first layer has an end face located in a medium facing surface. An end face of each of the second and third layers closer to the medium facing surface is located at a distance from the medium facing surface. A first nonmagnetic layer is disposed around the first layer. A second nonmagnetic layer is disposed between the medium facing surface and the end face of the second layer closer to the medium facing surface.
摘要:
Optical amplifier which can eliminate the need for an optical detection section before an external attenuating medium, can prevent SN degradation, and can reduce power required for pumping light. An attenuation amount detection section detects an amount of signal light attenuation caused by a variable optical attenuator and the external attenuating medium connected in series, by means of a front optical detection section provided before the variable optical attenuator and the external attenuating medium and a back optical detection section provided thereafter. An attenuation amount control section controls the variable optical attenuator such that the amount of signal light attenuation detected by the attenuation amount detection section is kept constant. A connection detection section detects a connection or disconnection of the external attenuating medium in accordance with the amount of signal light attenuation obtained when the amount of attenuation caused by the variable optical attenuator is minimized.
摘要:
A method of manufacturing a thin-film magnetic head comprises the steps of forming a first pole layer, forming a gap layer on a pole portion of the first pole layer, and forming a second pole layer on the gap layer. The second pole layer incorporates a first layer adjacent to the gap layer, and a second layer including a track width defining portion. The step of forming the second pole layer includes the steps of: forming a magnetic layer for forming the first layer on the gap layer; forming the second layer on the magnetic layer; and etching the magnetic layer to align with a width of the track width defining portion, so that the magnetic layer is formed into the first layer and the width of each of the first layer and the second layer taken in a medium facing surface is made equal to the track width.
摘要:
A pole layer has an end located in a medium facing surface, the end having: a first side close to a substrate; a second side located opposite to the first side; a third side connecting an end of the first side to an end of the second side; and a fourth side connecting the other end of the first side to the other end of the second side. The second side defines a track width. The end of the pole layer located in the medium facing surface has a width that decreases toward the first side. The pole layer is disposed in a groove of a pole-layer-encasing layer made of a nonmagnetic insulating material, with a nonmagnetic conductive film provided between the encasing layer and the pole layer. The pole layer incorporates: a first layer located closer to the surface of the groove; and a second layer located farther from the surface of the groove.
摘要:
In a method to manufacture a bar in which a row of slider sections are aligned, a wafer block is made from a wafer in which rows of slider sections are aligned. The wafer block is bonded to a dummy block on a support plate. Next, a processing step and a cutting step are repeated. The processing step is to perform specific processing on the medium facing surfaces of a row of slider sections in the medium facing surface of the wafer block bonded to the support plate. The cutting step is to cut the wafer block together with the support plate such that the row of slider sections whose medium facing surfaces have received the specific processing are separated from the wafer block to be the bar.
摘要:
A thin-film magnetic head comprises a top pole layer incorporating a throat height defining layer, an intermediate layer, and a yoke portion layer. The yoke portion layer includes a track width defining portion for defining the track width. Each of the throat height defining layer, the intermediate layer, and the track width defining portion has a width equal to the track width. The length of the intermediate layer is greater than the length of the throat height defining layer, and the length of the yoke portion layer is greater than the length of the intermediate layer, each of the lengths being taken in the direction orthogonal to the air bearing surface.
摘要:
A thin-film magnetic head comprises a bottom pole layer having a surface that faces toward a write gap layer. This surface incorporates a first surface including an end portion located in the air bearing surface, and a second surface located away from the air bearing surface. There is a difference in level between the first surface and the second surface, so that the second surface is located farther from the top pole layer than the first surface. A top pole layer incorporates a throat height defining layer, an intermediate layer, and a yoke portion layer. The yoke portion layer includes a track width defining portion for defining the track width. Each of the throat height defining layer, the intermediate layer, and the track width defining portion has a width equal to the track width.
摘要:
A thin-film magnetic head comprises a top pole layer incorporating a throat height defining layer and a yoke portion layer. The throat height defining layer is formed as follows. A magnetic layer to be a track width defining portion is formed on a recording gap layer. Next, the magnetic layer is selectively etched through the use of a mask so as to form an end portion of the magnetic layer for defining the throat height. Next, a nonmagnetic layer is formed to fill the etched portion of the magnetic layer while the mask is left unremoved. Next, the yoke portion layer is formed. Using the track width defining portion as a mask, the magnetic layer, the recording gap layer and a portion of the bottom pole layer are etched.
摘要:
A speed increasing gear used in a supercharger has a center roller connected to an output shaft, an outer wheel arranged eccentric to the center roller, and a plurality of intermediate rollers arranged within an annular space in which a width of the center roller with respect to a diametrical direction is uneven with respect to a circumferential direction of the center roller. The annular space is provided between the center roller and the outer wheel, and a pivot of at least one intermediate roller is movably arranged in a circumferential direction and a radial direction of the center roller.