摘要:
In a pressure-sensitive adhesive composition or a pressure-sensitive adhesive sheet containing an energy ray-curable polymer, problems associated with the volatilization of a low molecular weight compound contained in the composition are overcome. An energy ray-curable polymer characterized by comprising a radical generating group, which is capable of initiating a polymerization reaction upon excitation with an energy ray, and an energy ray-polymerizable group bonded together in the main or side chain.
摘要:
An adhesive sheet includes a substrate and an energy ray curable adhesive layer formed thereon The energy ray curable adhesive layer includes an acrylic adhesive polymer having a weight average molecular weight of not less than 100,000, and a polymerizable group is bonded to the acrylic adhesive polymer through a polyalkyleneoxy group. The energy ray curable adhesive sheet improves the breaking elongation and the expandability of the cured adhesives, thereby preventing the glue residue on the adherend of the sheet after release.
摘要:
A threaded joint for an oil well pipe in which a conventional threaded joint for an oil well pipe is improved so that sufficient fatigue fracture strength is secured, and a method for manufacturing the same are provided. An axial-direction residual stress of a threaded bottom part is set to −400 MPa or less as a value of X-ray stress analysis between a surface and a part with a depth of 40 μm.
摘要:
An adhesive sheet includes a substrate and an energy-ray curable adhesive layer formed on the substrate. The energy-ray curable adhesive layer includes an energy-ray curable acrylic copolymer and an energy-ray curable urethane acrylate. The energy-ray curable acrylic copolymer is formed by copolymerizing dialkyl(meth)acrylamide and includes a side chain with an unsaturated group. The energy-ray curable urethane acrylate includes an isocyanate block and a (meth)acryloyl group. The isocyanate block includes at least one of an isophorone diisocyanate, a trimethyl-hexamethyene diisocyanate, and a tetramethyl-xylene diisocyanate.
摘要:
In an exemplary layout structure of a semiconductor integrated circuit manufactured by a photolithographic process using an exposing light having a wavelength λ, a peripheral circuit region is formed by arranging a plurality of peripheral circuit cells, each having peripheral circuit patterns, along a side of an internal circuit region. A proximity dummy region is formed by arranging a plurality of proximity dummy cells, each having a proximity dummy pattern, along at least one side of the peripheral circuit region. The proximity dummy region includes a line-and-space repetition structure including, and having the regularity of, two or more pairs of lines and spaces between the lines every 8λ. The repetition structure in the proximity dummy region reduces the dimensional deviation in the outermost portion of the peripheral circuit region.
摘要:
In an exemplary layout structure of a semiconductor integrated circuit manufactured by a photolithographic process using an exposing light having a wavelength λ, a peripheral circuit region is formed by arranging a plurality of peripheral circuit cells, each having peripheral circuit patterns, along a side of an internal circuit region. A proximity dummy region is formed by arranging a plurality of proximity dummy cells, each having a proximity dummy pattern, along at least one side of the peripheral circuit region. The proximity dummy region includes a line-and-space repetition structure including, and having the regularity of, two or more pairs of lines and spaces between the lines every 8λ. The repetition structure in the proximity dummy region reduces the dimensional deviation in the outermost portion of the peripheral circuit region.
摘要:
A plurality of standard cells 10 are arranged to form a channel-less standard cell array 1, which has vertical and horizontal sides. A plurality of first proximity dummy cells 20 are arranged along each of the vertical sides of the standard cell array to form a first proximity dummy bands 20 such that the upper and lower sides of the first proximity dummy cells are in contact with each other and such that the left or right side of each of the first proximity dummy cells is in contact with the vertical side of the standard cell array 1. Furthermore, a plurality of second proximity dummy bands are arranged along each of the horizontal sides of the standard cell array to form a second proximity dummy bands such that the upper or lower side of each of the second proximity dummy cells is in contact with the horizontal side of the standard cell 1.
摘要:
A pipe joint formed by screwing a pin portion having a tapered male thread formed on the outer peripheral surface of the end of a pipe into a box portion having a tapered female thread formed on the inner peripheral surface of the end of a pipe or a short pipe so as to threadingly engage with the tapered male thread, the pipe joint having the following shape: clearance C between thread stab flanks: 0.5-1.0 mm thread stab flank angle &thgr;: 15-60 degrees thread crest surfaces and parallel to the pipe axis thread root surfaces: radius R of stab flank corner 1.0-1.25 mm portions of male thread: In addition, the taper of the incomplete thread portion of the pin portion is preferably 0.96-0.90 times the nominal taper of the complete thread portion.
摘要:
A threaded joint for an oil well pipe having (1) a tapered threaded having roughly the shape of a buttress thread, (2) a pin having a male thread and a box having a female thread, (3) a seal and a torque shoulder, characterized in that (i) the load flank angle of the threads is -20.degree. or greater and less than 0.degree., the stab flank angle is greater than 30.degree. and at most 60.degree. (ii) there is a positive amount of interference between the male threads and the female threads, and (iii) during and at the completion of make-up, the load flanks and the stab flanks are contacting each other, and there is a gap between the crests and the roots.
摘要:
An improved throwaway insert is proposed which has a cutting edge, a land extending along and inside of the cutting edge, a breaker groove extending along and inside of the land, a flat central area enclosed by the breaker groove, and a plurality of semicircular projections arranged in a chip breaker groove at its corners and its straight portions to enable chip to be satisfactorily broken over wide ranges of the depth of cut and the feed. These projections rise from midway of the breaker groove until they become even with the central area enclosed by the breaker groove.