摘要:
A vitreous film containing, e.g., 30-90 wt. % of Sn, 1-20 wt. % of P, 0.1-20 wt. % of Pb, 2-30 wt. % of 0 and 5-35 wt. % of F is formed by vapor deposition on a substrate such as glass, metal, plastic or ceramic. A light-absorbing substance can be incorporated in the vitreous film to provide a recording layer for a heat-mode optical recording medium capable of causing decoloration or formation of pits on irradiation with a laser beam.
摘要:
An X-ray waveguide includes a cladding and a core. The core has a periodic structure formed in at least one period direction. The periodic structure includes periodically arranged members made of material having different refractive index real parts. The core is surrounded by the cladding in the plane perpendicular to a wave-guiding direction. The Bragg angle obtained from the periodicity of the periodic structure is smaller than the total reflection critical angle at which X-rays are incident on the interface between the cladding and the core. The at least one period direction is the direction of at least one fundamental vector expressing the periodicity of the periodic structure in a plane of the core perpendicular to the wave-guiding direction.
摘要:
A multilayer electronic component that can suppress the formation of projections and depressions on a surface, and an electronic component unit including the multilayer electronic component, are provided. In the multilayer electronic component, coil electrodes (8) having a shape of ring-shaped wiring with a part removed therefrom are electrically connected to each other to constitute a coil (L). Magnetic layers (4) are stacked together with the plurality of coil electrodes (8). The coil electrodes (8a, 8c, 8e) having a radius r1 and the coil electrodes (8b, 8d) having a radius r2 that is smaller than the radius r1 may be alternately arranged in a stacking direction.
摘要:
Cost is reduced and reliability is improved with a CSP type semiconductor device. A glass substrate which works as a supporting plate is bonded through an adhesive to a first surface of a semiconductor wafer on which first wirings are formed. Thickness of the semiconductor wafer is reduced by back-grinding the semiconductor wafer on a second surface of the semiconductor wafer which is opposite to the first surface of the semiconductor wafer. The semiconductor wafer is wet-etched to remove bumps and dips on the second surface of the semiconductor wafer caused during the back-grinding. Then the second surface of the semiconductor wafer is etched to form a tapered groove. The semiconductor wafer is wet-etched to reduce bumps and dips caused by the etching and round a corner of the groove. The wet-etching improves coverage of insulation film, wiring and protection film and enhances yield and reliability of the semiconductor device.
摘要:
A manufacturing method of a semiconductor device formed in a chip size package is improved to enhance a yield and reliability. A window to expose first wirings is formed only in a region of a semiconductor substrate where the first wirings exist. As a result, area of the semiconductor substrate bonded to a supporting body through an insulation film and a resin is increased to prevent cracks in the supporting body and separation of the semiconductor substrate from the supporting body. A slit is formed along a dicing line after forming the window, the slit is covered with a protection film and then the semiconductor substrate is diced into individual semiconductor dice. Thus, separation on a cut surface or at an edge of the semiconductor dice, which otherwise would be caused by contact of the blade in the dicing can be prevented.
摘要:
This invention is directed to offer a technology that makes it possible to form desired bump electrodes easily when the bump electrodes are to be formed at locations lowered by a step. There is formed an isolation layer 12 to isolate each of bump electrode forming regions 11. The isolation layer 12 is a resist layer, for example, and is formed by exposure and development processes, for example. Each of the bump electrode forming regions 11 is surrounded by the isolation layer 12 and a protection layer 10 that covers a side surface of a semiconductor substrate 2. Then, a printing mask 16 that has openings 15 at locations corresponding to the bump electrode forming regions 11 is placed above the semiconductor substrate 2. Next, solder 17 in paste form is applied to the printing mask 16. Then the solder 17 is applied to a metal layer 9 by moving a squeeze 18 at a constant speed. Bump electrodes 19 are obtained by heating, melting and re-crystallizing the solder 17 after removing the printing mask 16.
摘要:
A method of producing a material capable of electrochemically storing and releasing a large amount of lithium ions is provided. The material is used as an electrode material for a negative electrode, and includes silicon or tin primary particles composed of crystal particles each having a specific diameter and an amorphous surface layer formed of at least a metal oxide, having a specific thickness. Gibbs free energy when the metal oxide is produced by oxidation of a metal is smaller than Gibbs free energy when silicon or tin is oxidized, and the metal oxide has higher thermodynamic stability than silicon oxide or tin oxide. The method of producing the electrode material includes reacting silicon or tin with a metal oxide, reacting a silicon oxide or a tin oxide with a metal, or reacting a silicon compound or a tin compound with a metal compound to react with each other.
摘要:
The invention prevents a pad electrode for external connection of a semiconductor device from being damaged. An electronic circuit, a first pad electrode connected to the electronic circuit, and a second pad electrode connected to the first pad electrode are formed on a semiconductor substrate. A first protection film is formed, covering the first pad electrode and having an opening on the second pad electrode only. A wiring layer is further formed, being connected to the back surface of the first pad electrode through a via hole penetrating the semiconductor substrate and extending from the via hole onto the back surface of the semiconductor substrate.
摘要:
A switching control circuit comprises: an error amplifying circuit configured to output an error voltage obtained by amplifying an error between a feedback voltage corresponding to an output voltage and a lower voltage selected out of a first reference voltage increasing with time passage and a second reference voltage used as a reference for a target level; a comparison circuit configured to output a comparison signal obtained by comparing the feedback voltage with the error voltage output from the error amplifying circuit; and a drive circuit configured to output first and second control signals for controlling first and second transistors, respectively, in order to turn the output voltage to the target level by complementarily turning on and off the first and second transistors, after the error voltage exceeds the feedback voltage, based on the comparison signal output from the comparison circuit.
摘要:
A semiconductor device with improved moisture resistance and its manufacturing method as well as a manufacturing method of a semiconductor device which simplifies a manufacturing process and improves productivity are offered. This invention offers a CSP type semiconductor device and its manufacturing method that can prevent moisture and the like from infiltrating into it to attain high reliability by covering a side surface of a semiconductor chip with a thick protection layer. This invention also offers a highly productive manufacturing method of semiconductor devices by which a supporter bonded to semiconductor dice is etched from a back surface-side of the supporter so that the semiconductor devices can be separated without dicing.