摘要:
The present invention relates to an aromatic polycarbonate resin which comprises repetitive units originating in residual groups of a 2,2-bis(4-hydroxyphenyl)adamantane compound and a 1,3-bis(4-hydroxyphenyl)adamantane compound having a substituent on an aromatic ring and which is excellent in a transparency, a heat resistance and a mechanical strength and has a good moldability and a production process for the aromatic polycarbonate resin described above in which the adamantane compounds described above are reacted with a carbonic ester-forming compound. Further, it relates to an aromatic polycarbonate resin which is excellent in an optical characteristic and an optical part prepared by molding the same.
摘要:
The present invention relates to an aromatic polycarbonate resin which comprises repetitive units originating in residual groups of a 2,2-bis(4-hydroxyphenyl)adamantane compound and a 1,3-bis(4-hydroxyphenyl)adamantane compound having a substituent on an aromatic ring and which is excellent in a transparency, a heat resistance and a mechanical strength and has a good moldability and a production process for the aromatic polycarbonate resin described above in which the adamantane compounds described above are reacted with a carbonic ester-forming compound. Further, it relates to an aromatic polycarbonate resin which is excellent in an optical characteristic and an optical part prepared by molding the same.
摘要:
A practically realizable semiconductor magnetic body having a flat-band structure is disclosed. The semiconductor magnetic body is formed by semiconductor quantum dots arranged on lattice points such that electrons can transfer between neighboring quantum dots and the electron energy band contains a flat-band structure, where each quantum dot is a structure in which electrons are confined inside a region which is surrounded by high energy potential regions, and the flat-band structure is a band structure in which energy dispersion of electrons has hardly any wave number dependency.
摘要:
In a casing unit of the automotive air conditioner, an expanding portion of a mixing door with which an air flow is brought into direct contact is curved toward an upstream side of the air flow in a convex fashion.
摘要:
A color cathode ray tube having electron gun with a plurality of electrodes for generating and focusing three in-line electron beams toward a phosphor screen. A deflection device is mounted between a funnel portion and a neck portion for deflecting the three electron beams in horizontal and vertical directions, and a convergence correction device including a plurality of magnetic pieces positioned with respect to the three electron beams in an in-line direction of the three electron beams in magnetic deflection fields generated by the deflection device. The plurality of magnetic pieces include at least one first magnetic piece positioned on a neck wall side of side electron beams of the three electron beams in in-line direction and at least one second magnetic piece positioned with respect to a center electron beam of the three electron beams in the in-line direction, and the plurality of magnetic pieces are configured so as to locally modify the magnetic deflection fields and to make three rasters formed on the phosphor screen by the three electron beams coincident with each other. The at least one first magnetic piece has a portion of an axial length greater than an axial length of the at least one second magnetic piece, and the axial lengths are measured in a plane containing the in-line direction and a longitudinal axis of the color cathode ray tube.
摘要:
A heat exchanger comprises outer fins; a plurality of tubes arranged alternately with the outer fins; and header tanks receiving open ends of the tubes for communication with the tubes. The header tanks each comprise a first member and a second member which are combined to each other. The first member has tube insertion slots into which the open ends of the tubes are inserted, the second member does not have the tube insertion slots. The first member is either a core material having no brazing material layers on outer and inner peripheral surfaces thereof, or a core material having a brazing material layer on an outer peripheral surface thereof but having no brazing material layer on an inner peripheral surface thereof. The second member is brazed to the outer or inner peripheral surface of the first member having no brazing material layer thereon.
摘要:
An electrical connector has a conductive contact which has a main contacting portion to be connected to a conductive mating contact and a terminal portion to be connected to a connection object, and an insulator holding the contact. The contact is divided into a first contact part having the main contacting portion and a second contact part having the terminal portion. The first contact part has a spring portion to be brought into elastic contact with the second contact part. The first contact part is held by the insulator to be independently removable.
摘要:
A small, thin camera module is provided in which a chipset made up of the image pickup element (13), etc., is sealed with the transparent resin (15) wherein a camera module (10) is made up of a conductive pattern (11); a signal processing element (12) having a surface on which an element is formed and which is shielded from light by being mounted facedown on the conductive pattern (11); an image pickup element (13) fixed onto the signal processing element (12); a thin metal wire (16) by which an electrical connection is established between the image pickup element (13) and the conductive pattern (11); a transparent resin (15) with which the signal processing element (12), the image pickup element (13), and the thin metal wire (16) are covered; and a lens (24) situated above the image pickup element (13).
摘要:
An electrical connector has a conductive contact which has a main contacting portion to be connected to a conductive mating contact and a terminal portion to be connected to a connection object, and an insulator holding the contact. The contact is divided into a first contact part having the main contacting portion and a second contact part having the terminal portion. The first contact part has a spring portion to be brought into elastic contact with the second contact part. The first contact part is held by the insulator to be independently removable.
摘要:
A color cathode ray tube including a panel section having a phosphor layer formed on an internal surface thereof, a neck portion having an electron gun assembly for emission of three electron beams therein, and a funnel section connecting the panel section and the neck portion. The electron gun assembly includes three cathodes and a plurality of grid electrodes disposed along a tube axis. The grid electrodes includes at least one plate-shaped electrode which has a fixed support structure. The plate-shaped electrode has three bulged portions along an electron beam passage, a first electron beam passage hole being formed in a respective bulged portion and a second electron beam passage being hole formed in a top face portion of a respective bulge portion. A diameter of the first electron beam passage hole is greater than a diameter of the second electron beam passage hole.