Abstract: A method of analyzing a nitride semiconductor layer in which a mixing ratio at a ternary mixed-crystal nitride semiconductor layer can be analyzed non-destructively, simply, and precisely, even its surface is covered with a cap layer is provided. The nitride semiconductor layer having an AN layer or a BN layer with a thickness of 0.5 to 10 nm that is stacked on an AxB1-xN layer (A and B: 13 group elements, 0?x?1) is subjected to reflection spectroscopy to obtain a reflection spectrum of the AxB1-xN layer. Let an energy value in a peak position of the reflection spectrum be a band gap energy Egap, and let a band gap energy value of AxB1-xN (x=1) be EA and a band gap energy value of AxB1-xN (x=0) be EB, x is calculated from Equation Egap=(1?x)EB+xEA?bx(1?x) (where b is bowing parameter corresponding to A and B).

Abstract: An electrical connector, includes a protection circuit for protecting circuits on a circuit board. The electrical connector includes a housing, a plurality of contacts secured to the housing, and a semiconductor device built into the housing. The semiconductor devices include an overvoltage protection device, and the plurality of contacts are grounded through the overvoltage protection device.

Abstract: An electronic device includes a frame having a frame member with a frame connector. The frame defines a component cavity. The electronic device also includes a user interface coupled to the frame that is visible external of the frame, with the user interlace displaying data to an operator. A user input is coupled to the frame member and includes a terminal electrically coupled to the frame connector. A circuit board is received in the component cavity and is operably coupled to the user interface. The circuit board is electrically connected to the frame connector at a separable interface. The user input can pick up a signal from anywhere on the electronic device based on an action of touching, handling or placing and process that signal to cause a predetermined effect. The signal from the user input is transferred to the user interface via the frame connector and the circuit board.

Abstract: An optical disk includes a first area on which user information is recorded, and a second area in which a plurality of marks radially extending are arranged in a track direction in the optical disk. Information about the reflectance of the optical disk is recorded in the second area. It is intended to optimize the amplification factor of the reproduced signal on the basis of the information about the reflectance of the optical disk in the second area. Control data and user data can be reproduced quickly and highly reliably without depending on the relationship between the reflectances of a recording area and a non-recorded area of the optical disk.

Abstract: An optical material having a high birefringence and a small absolute value of a photoelastic coefficient is provided by use of a resin composition for an optical material comprising a resin (a) having a positive photoelastic coefficient and a negative inherent birefringence and a resin (b) having a negative photoelastic coefficient and a negative inherent birefringence.

Abstract: An electrical connector, includes a protection circuit for protecting circuits on a circuit board. The electrical connector includes a housing, a plurality of contacts secured to the housing, and a semiconductor device built into the housing. The semiconductor devices include an overvoltage protection device, and the plurality of contacts are grounded through the overvoltage protection device.

Abstract: A contact includes a substantially rectangular base plate. A linking member extends from the base plate such that the linking member is perpendicular thereto. A first elastic contact arm extends obliquely upward from a tip end of the linking member. The first elastic contact arm has a contact member for electrically connecting the first elastic contact arm to an integrated circuit socket. A second elastic contact arm extends obliquely downward from a tip end of the linking member. The second elastic contact arm has a contact member for electrically connecting the second elastic contact arm to a circuit board.

Abstract: A contact includes a substantially rectangular base plate. A linking member extends from the base plate such that the linking member is perpendicular thereto. A first elastic contact arm extends obliquely upward from a tip end of the linking member. The first elastic contact arm has a contact member for electrically connecting the first elastic contact arm to an integrated circuit socket. A second elastic contact arm extends obliquely downward from a tip end of the linking member. The second elastic contact arm has a contact member for electrically connecting the second elastic contact arm to a circuit board.

Abstract: A contact includes a substantially rectangular base plate. A linking member extends from the base plate such that the linking member is perpendicular thereto. A first elastic contact arm extends obliquely upward from a tip end of the linking member. The first elastic contact arm has a contact member for electrically connecting the first elastic contact arm to an integrated circuit socket. A second elastic contact arm extends obliquely downward from a tip end of the linking member. The second elastic contact arm has a contact member for electrically connecting the second elastic contact arm to a circuit board.

Abstract: The present invention related generally to thermoplastic films, and, more particularly, to low haze thermoplastic films with high thickness uniformity, methods for manufacturing low haze thermoplastic films with high thickness uniformity, and manufacturing systems for forming the same.

Abstract: An optical disk includes a first area on which user information is recorded, and a second area in which a plurality of marks radially extending are arranged in a track direction in the optical disk. Information about the reflectance of the optical disk is recorded in the second area. It is intended to optimize the amplification factor of the reproduced signal on the basis of the information about the reflectance of the optical disk in the second area. Control data and user data can be reproduced quickly and highly reliably without depending on the relationship between the reflectances of a recording area and a non-recorded area of the optical disk.

Abstract: An optical disk includes a first area on which user information is recorded, and a second area in which a plurality of marks radially extending are arranged in a track direction in the optical disk. Information about the reflectance of the optical disk is recorded in the second area. It is intended to optimize the amplification factor of the reproduced signal on the basis of the information about the reflectance of the optical disk in the second area. Control data and user data can be reproduced quickly and highly reliably without depending on the relationship between the reflectances of a recording area and a non-recorded area of the optical disk.

Abstract: A contact includes a substantially rectangular base plate. A linking member extends from the base plate such that the linking member is perpendicular thereto. A first elastic contact arm extends obliquely upward from a tip end of the linking member. The first elastic contact arm has a contact member for electrically connecting the first elastic contact arm to an integrated circuit socket. A second elastic contact arm extends obliquely downward from a tip end of the linking member. The second elastic contact arm has a contact member for electrically connecting the second elastic contact arm to a circuit board.

Abstract: An optical material having a high birefringence and a small absolute value of a photoelastic coefficient is provided by use of a resin composition for an optical material comprising a resin (a) having a positive photoelastic coefficient and a negative inherent birefringence and a resin (b) having a negative photoelastic coefficient and a negative inherent birefringence.

Abstract: An information-recording medium includes first and second recording layers each of which is formed of a phase-change material containing Bi, Ge, and Te, wherein the first recording layer is arranged nearer to a light-incident side of the laser beam than the second recording layer; a composition of Bi, Ge, and Te contained in the second recording layer is within a composition range surrounded by composition points B2, C2, D2, D6, C6, and B6 on a triangular composition diagram of Bi, Ge, and Te; and a difference (???) between a composition ? of Bi in the first recording layer and a composition ? of Bi in the second recording layer is ?1.0 to 3.0 at. %. Thus, there is provided a two-layered information-recording medium with high recording-data reliability and excellent repeated-data recording durability.

Abstract: It is an object of the present invention to provide a resin composition that is used as an optical material and has a low change in birefringence with external force, and a molding thereof. According to the present invention, there is provided a resin composition comprising an acrylic resin (a) and an aliphatic polyester resin (b).

Abstract: A pattern forming device has a transfer unit which transfers a pattern image formed on a planographic plate held by a printing frame onto the surface of a glass plate held on an XY stage. After the glass plate and the planographic plate have been positioned by the XY stage, the transfer unit moves a stroke roller disposed on the rear surface side of the planographic plate in an arrow direction so that the stroke roller may be pressed against the planographic plate, thereby transferring the pattern image onto the glass plate by an electric field while, at the same time, stroking solvent components interposed between the planographic plate and the glass plate.

Abstract: An integrated circuit socket comprises an insulative housing having an integrated circuit package receiving recess provided with a plurality of contact receiving openings arranged in a matrix. Contacts are arranged in the contact receiving openings. Each of the contacts has a base fixed to the contact receiving opening and a contact arm that extends away from the base. The contact arm has a contact portion with a contact point at an uppermost end. The contact portion overlaps with the contact arm of an adjacent one of the contacts. First partition walls separate the contact receiving openings in a direction substantially perpendicular to a direction in which the contact arms extend. The uppermost ends are arranged below tops of the first partition walls.

Abstract: The electrical connector of the present invention has an insulative housing having a first face across from a first electrical circuit and a second face across from a second electrical circuit. A plurality of contacts are mounted in the insulative housing, each of which contacts a contact point of the first electrical circuit at the first face, and contacts a contact point of the second electrical circuit at the second face, thereby interconnecting the first and second circuits. Each of the contacts has one portion of the contact supported by the insulative housing so as to be capable of pivoting in response to the displacement of the first contact portion and the second contact portion.

Abstract: An phase-change optical disk comprises a substrate, a first protective layer, a first thermostable layer, a recording layer, a second thermostable layer, a second protective layer, an absorptance control layer, and a heat-diffusing layer which are provided in this order from a side on which a laser beam comes thereinto, wherein a recording layer material has composition ratios which are within a range surrounded by composition points of B3 (Bi3, Ge46, Te51), C3 (Bi4, Ge46, Te50), D3 (Bi5, Ge46, Te49), D5 (Bi10, Ge42, Te48), C5 (Bi10, Ge41, Te49), and B5 (Bi7, Ge41, Te52) on a triangular composition diagram. Recrystallization is not caused even when information is recorded on an inner circumferential portion, a reproduced signal is scarcely deteriorated even when rewriting is performed multiple times, and any erasing residue of amorphous matters scarcely appears at an outer circumferential portion.