摘要:
A lubricating structure for a wet multi-plate clutch is disclosed. The clutch comprises a clutch center member, a clutch guide member positioned radially outward with respect to said clutch center member, a plurality of friction plates disposed between the clutch center member and the clutch guide, the friction plates being alternately coupled to the clutch center member and the clutch guide member respectively. A clutch piston is located adjacent a first end one of the friction plates, for urging the friction plates into frictional engagement with one another, wherein a gap is formed between the piston and the end friction plate before the urging of the engagement of the friction plates. The lubricating structure comprises a first bore formed in the clutch guide member at a position near the first end one of the friction plates for discharging lubricating oil therethrough, and a second bore formed in the clutch center member for supplying lubricating oil to the clutch. The lubricating oil flows from the second bore, through the gap between the clutch piston and the first end friction plate, and through the first bore, before the clutch piston urges the friction plates into engagement, wherein the gap is closed and the flow of lubricating oil through the gap is stopped, when the clutch piston urges the friction plates into engagement.
摘要:
A silicon substrate 12 has a main face in a (100) plane, whereby a fracture 17 generated from a molten processed region 13 acting as a start point extends in a cleavage direction of the silicon substrate 12 (a direction orthogonal to the main face of the silicon substrate 12). Here, a rear face 1b of an object to be processed 1A and a front face 10a of an object to be processed for separation 10A are bonded to each other by anode bonding, whereby the fracture 17 reaches a front face 1a of the object 1A continuously without substantially changing its direction. When generating a stress in the object for separation 10A, the fracture 17 has reached a rear face 10b of the object for separation 10A and thus easily extends toward the object 1A.
摘要:
The present invention provides a laser processing method comprising the steps of attaching a protective tape 25 to a front face 3 of a wafer 1a, irradiating a substrate 15 with laser light L while employing a rear face of the wafer 1a as a laser light entrance surface and locating a light-converging point P within the substrate 15 so as to form a molten processed region 13 due to multiphoton absorption, causing the molten processed region 13 to form a cutting start region 8 inside by a predetermined distance from the laser light entrance surface along a line 5 along which the object is intended to be cut in the wafer 1a, attaching an expandable tape 23 to the rear face 21 of the wafer 1a, and expanding the expandable tape 23 so as to separate a plurality of chip parts 24 produced upon cutting the wafer 1a from the cutting start region 8 acting as a start point from each other.
摘要:
An object to be processed 1 is irradiated with laser light L with a standard pulse waveform, so as to form a molten processed region 131, which has a larger size in the thickness direction of the object 1 and is easy to generate a fracture 24 in the thickness direction of the object 1, within a silicon wafer 111, and with laser light L with a retarded pulse waveform, so as to form a molten processed region 132, which has a smaller size in the thickness direction of the object 1 and is hard to generate the fracture 24 in the thickness direction of the object 1, within a silicon wafer 112.
摘要:
A working object cutting method capable of cutting a working object precisely is provided. The working object cutting method comprises irradiating a working object 1 with a laser beam while locating a converging point at the working object, so as to form a reformed region in the working object 1 along a reformed-region forming line 15 set at a predetermined distance inside from an outer edge E of the working object 1 along the outer edge, forming a cutting reformed region in the working object 1 along a cutting-scheduled line 5, and cutting the working object 1 along the cutting-scheduled line 5 from a cutting reformed region acting as a start point. Thus forming the working object 1 with the reformed region along the reformed-region forming line 15 set at a predetermined distance inside from the outer edge E of the working object 1 allows the formed reformed region or fissures extending therefrom to inhibit fissures generated in an outer edge portion 25 of the working object 1 from extending to the inside even if a cutting stress is applied to the working object 1 when cutting the working object 1.
摘要:
An object to be processed is reliably cut along a line to cut. An object to be processed is irradiated with laser light while locating a converging point at the object, so as to form a modified region in the object along a line to cut. The object formed with the modified region is subjected to an etching process utilizing an etching liquid exhibiting a higher etching rate for the modified region than for an unmodified region, so as to etch the modified region. This can etch the object selectively and rapidly along the line to cut by utilizing a higher etching rate in the modified region.
摘要:
A hydrogen storage alloy comprises a hydrogen storage base formed of a mixture of magnesium and an alloy, such as a magnesium-nickel alloy, a magnesium-titanium alloy, a magnesium-niobium alloy, a magnesium-manganese alloy, or a magnesium-cobalt alloy, and a catalytic layer covering a surface of the base. A hydrogen storage alloy unit includes the hydrogen storage base and a porous body including an assembly of nanofibers. The alloy may be vapor-deposited onto the assembly of nanofibers. The nanofibers may be tangled to provide spaces between the fibers for the passage of hydrogen molecules. The nanofibers in one example are also porous. A catalytic layer of platinum may cover a surface of the hydrogen storage base.
摘要:
A laser beam machining method and a laser beam machining device capable of cutting a work without producing a fusing and a cracking out of a predetermined cutting line on the surface of the work, wherein a pulse laser beam is radiated on the predetermined cutting line on the surface of the work to cause multiple photon absorption and with a condensed point located inside of the work, and a modified area is formed inside the work along the predetermined determined cutting line by moving the condensed point along the predetermined cut line, whereby the work is cut with a small force by cracking the work along the predetermined cutting line starting from the modified area and, because the pulse laser beam is hardly absorbed onto the surface.
摘要:
A hydrogen storage alloy unit comprises a porous body 7 having a large number of holes (spaces) 9 allowing hydrogen atoms to pass through, and a hydrogen storage alloy covering a surface of the porous body 7, inclusive of surfaces of the holes thereof. The hydrogen storage alloy includes a hydrogen storage base formed of a hydrogen storage material, and a catalytic layer covering a surface of the hydrogen storage base. The porous body 7 is formed of an assembly of hydrogen storage fibers 8 formed by vapor-depositing the hydrogen storage alloy onto nanofibers.
摘要:
A hydrogen storage alloy comprises a hydrogen storage base 2 formed of a mixture of Mg and an alloy (Mg2Ni, for example), and a catalytic layer 3 covering a surface of the hydrogen storage base 2. The hydrogen storage alloy with this structure exhibits both a high ability to store hydrogen and a high ability to cause hydrogen to diffuse in it in the solid state, provided by Mg and Mg2Ni, respectively. Hydrogen absorbed in Mg in one region is passed on to Mg (or Mg2Ni) in another region by virtue of Mg2Ni. Since this movement of hydrogen does not require heat nor pressure, hydrogen can be absorbed at room temperature and atmospheric pressure.