Abstract: A high-resistance region is formed right under a seal ring by irradiating a semiconductor substrate with hydrogen ions or helium ions. The high-resistance region has a greater thickness than an isolation insulating layer formed as a shallow trench isolation (STI) region on the surface of the semiconductor substrate. As a result, a semiconductor integrated circuit including a seal ring achieving excellent high-frequency isolation is provided.

Abstract: A diversity reception circuit obtains a synthesized output based on signals received at a plurality of antennas. The diversity reception circuit includes a plurality of PLLs outputting respective local oscillation signals; a plurality of mixers converting respective received radio frequency signals to low frequency signals; and a switch circuit selecting any one of outputs of the PLLs and supplying the selected output to at least one of the mixers.

Abstract: A prism used in analysis utilizing surface plasmons is prism of a dielectric medium with a predetermined reflective index. Trapezoidal prism comprises an incident surface on which excitation light is incident from outside, a reflective surface at which the excitation light incident on the incident surface is reflected, an emission surface from which the excitation light reflected by the reflective surface is emitted; and an opposite surface which opposes the reflective surface. The opposite surface is a recessed sinkmark surface.

Abstract: A prism used in analysis utilizing surface plasmons is prism of a dielectric medium with a predetermined reflective index. Trapezoidal prism comprises an incident surface on which excitation light is incident from outside, a reflective surface at which the excitation light incident on the incident surface is reflected, an emission surface from which the excitation light reflected by the reflective surface is emitted; and an opposite surface which opposes the reflective surface. The opposite surface is a recessed sink-mark surface.

Abstract: A diversity reception circuit obtains a synthesized output based on signals received at a plurality of antennas. The diversity reception circuit includes a plurality of PLLs outputting respective local oscillation signals; a plurality of mixers converting respective received radio frequency signals to low frequency signals; and a switch circuit selecting any one of outputs of the PLLs and supplying the selected output to at least one of the mixers.

Abstract: A prism used in analysis utilizing surface plasmons is prism of a dielectric medium with a predetermined reflective index. Trapezoidal prism comprises an incident surface on which excitation light is incident from outside, a reflective surface at which the excitation light incident on the incident surface is reflected, an emission surface from which the excitation light reflected by the reflective surface is emitted; and an opposite surface which opposes the reflective surface. The opposite surface is a recessed sink-mark surface.

Abstract: An injection mold composed of a movable mold and a fixed mold. The movable mold has bases, a heat insulating layer and a surface processed layer, and the fixed mold has a base. A heat insulator is provided on the inner circumferential surface of the base of the movable mold at a part forming a wall of a cavity. The heat insulating layer is in the rear of the surface processed layer, and therefore, the transfer accuracy of a fine configuration of the surface processed layer is improved. Additionally, since the heat insulator is provided adjacent to the fine configuration, heat radiation from resin is inhibited, and the transfer accuracy of the fine configuration is further improved.

Abstract: An injection molding comprises: a fixed mold; a movable mold which is capable of contacting to and separating from the fixed mold; and an injection unit which supplies molten resin to a space formed between the fixed mold and the movable mold when being pressed to a non-molding face of the fixed mold. The injection unit comprises: a nozzle portion which injects molten resin to the space formed between the molds; an injecting portion which applies molten resin pressure toward the space formed between the fixed mold and the movable mold though the nozzle portion; a heater and a temperature sensor provided on the nozzle portion; and a heater and a temperature sensor provided on the injecting portion, and detection accuracy of the sensor of the nozzle portion is higher than that of the injecting potion. There is thus provided an injection molding machine capable of manufacturing optics with high accuracy without considerable cost-up by realizing stable and highly accurate injection.

Abstract: A molding machine includes a fixed mold and a movable mold. The molding machine is a so called micro molding machine which provides less than 150 KN of the mold clamping force for clamping the fixed mold and the movable mold. A positional shift length between both molds is preset at ±20 gm or less. Further, cavities are inserted in base molds of both molds respectively. Furthermore, cores are inserted in the cavities. The position of each cavity is adjustable with respect to each associated base mold. The position of each core is also adjustable with respect to each associated cavity. Moreover, the molding machine can simultaneously mold a plurality of optical components.

Abstract: A purpose is to provide an optical component molding apparatus for producing a small-size and high-precision optical component and achieving good transferability and stability of a molded product. A multi-cavity molding machine 100 has a gate 51, a runner 52, and a sprue 53 each having the shape determined to meet conditions (1) to (5): (1) “Miminum gate thickness”/“Maximum runner thickness” is in a range of more than 0.2 to less than 1.0; (2) “Gate length”/“Maximum runner thickness” is in a range of more than 0.4 to less than 4.0; (3) “Outlet diameter of sprue” is in a range of more than 1.0 mm to less than 5.5 mm; (4) “Sprue length” is in a range of more than 10 mm to less than 40 mm; and (5) “Outlet diameter of sprue”/“Inlet diameter of sprue” is in a range of more than 1 to less than 8.

Abstract: A mold assembly that is adapted to clamp fixed mold and movable mold together while making temperature adjustment and inject a molding material into a molding cavity provided therebetween, thereby producing an optical part. The mold assembly is one including fixed platen supporting fixed mold, provided on a part of its mold-side surface with locating hole and including ring of configuration with external and internal surfaces, fitted at its external surface in the locating hole, wherein the fixed mold is provided with a locating projection protruding toward the fixed platen, fitted in the internal surface of the locating hole, and wherein the ring consists of a material whose linear expansion coefficient is smaller than those of the material of the fixed platen and the material of the locating projection.

Abstract: An injection mold and an injection molding apparatus having a movable mold and a fixed mold. Each of the movable/fixed molds has bases, and a runner, a gate and a cavity are formed. The gate is composed of recesses made in mutually opposite end surfaces of sleeve-like heat insulators provided for the bases. Thereby, the gate is heat-insulated, and resin in the gate is prevented from cooling down during a pressure retention step. Thus, the resin keeps fluidity longer.

Abstract: A mold assembly that is adapted to clamp fixed mold and movable mold together while making temperature adjustment and inject a molding material into a molding cavity provided therebetween, thereby producing an optical part. The mold assembly is one including fixed platen supporting fixed mold, provided on a part of its mold-side surface with locating hole and including ring of configuration with external and internal surfaces, fitted at its external surface in the locating hole, wherein the fixed mold is provided with a locating projection protruding toward the fixed platen, fitted in the internal surface of the locating hole, and wherein the ring consists of a material whose linear expansion coefficient is smaller than those of the material of the fixed platen and the material of the locating projection.

Abstract: An apparatus for molding optical components of a small size and high precision is provided with good transferability and a reduced production cycle. This apparatus includes a plurality of runners arranged in a pattern allowing multi-cavity molding for molding plastic lenses each having an outer diameter of 2 mm to 12 mm and surface roughness Ra of 20 nm or less. The total projected area of the runners is determined within a range of 1 cm2 to 12 cm2. The runners are arranged to extend around a sprue in directions perpendicular to an outer surface of the base molds. The pattern of the runners extending from the junction with the sprue to each shape transfer section is configured in two intersecting directions. A cavity is of a rectangular outer shape when seen from a pressure contact surface side.

Abstract: An injection molding machine includes a fixed mold, a movable mold capable of contacting to and separating from the fixed mold, and an injection unit which is provided to a non-molding face of the fixed mold and supplies molten resin to a space formed between the fixed mold and the movable mold. In the case the fixed mold and the movable mold are repeatedly opened and closed for continual molding, the molds firstly get contact with each other and clamped thereat and after that, the injection unit is made to press the non-molding face of the fixed mold. Furthermore, after releasing the pressure of the injection unit to the non-molding face of the fixed mold, clamping force to clamp the molds is released. Thus, there is provided an injection molding machine capable of avoiding shift of a fixed mold due to bending or tilting of a fixed platen and manufacturing optical elements with excellent anti-eccentricity at respective faces and high accuracy.

Abstract: An injection molding comprises: a fixed mold; a movable mold which is capable of contacting to and separating from the fixed mold; and an injection unit which supplies molten resin to a space formed between the fixed mold and the movable mold when being pressed to a non-molding face of the fixed mold. The injection unit comprises: a nozzle portion which injects molten resin to the space formed between the molds; an injecting portion which applies molten resin pressure toward the space formed between the fixed mold and the movable mold though the nozzle portion; a heater and a temperature sensor provided on the nozzle portion; and a heater and a temperature sensor provided on the injecting portion, and detection accuracy of the sensor of the nozzle portion is higher than that of the injecting potion. There is thus provided an injection molding machine capable of manufacturing optics with high accuracy without considerable cost-up by realizing stable and highly accurate injection.

Abstract: The present invention provides an injection mold for forming free-form surface optical element that is possible to produce with high accuracy at low cost a free-form surface optical element that has a stable relation between the free-form surface and the mounting reference surface and is easy to adjust when mounting. The mold comprises a fixed mold and a movable mold for forming a free-form surface (effective area 21) and a rear surface opposite to the free-form surface. The fixed mold and the movable mold are divided by a parting line PL along the peripheral end surface of the free-form surface optical element 14. A mold surface for molding the free-form surface (effective area 21) and a mold surface for molding axial-direction mounting reference surfaces 28a-28c for mounting the free-form surface optical element in a direction substantially perpendicular to the free-form surface are positioned in the mold on the same side with respect to the parting line PL.

Abstract: A purpose is to provide an optical component molding apparatus for producing a small-size and high-precision optical component and achieving good transferability and stability of a molded product. A multi-cavity molding machine 100 has a gate 51, a runner 52, and a sprue 53 each having the shape determined to meet conditions (1) to (5): (1) “Miminum gate thickness”/“Maximum runner thickness” is in a range of more than 0.2 to less than 1.0; (2) “Gate length”/“Maximum runner thickness” is in a range of more than 0.4 to less than 4.0; (3) “Outlet diameter of sprue” is in a range of more than 1.0 mm to less than 5.5 mm; (4) “Sprue length” is in a range of more than 10 mm to less than 40 mm; and (5) “Outlet diameter of sprue”/“Inlet diameter of sprue” is in a range of more than 1 to less than 8.

Abstract: An apparatus for molding optical components of a small size and high precision is provided with good transferability and a reduced production cycle. This apparatus includes a plurality of runners arranged in a pattern allowing multi-cavity molding for molding plastic lenses each having an outer diameter of 2 mm to 12 mm and surface roughness Ra of 20 nm or less. The projected area of the entire runner is determined within a range of 1 cm2 to 12 cm2. The runners are arranged to extend around a sprue in directions perpendicular to an outer surface of the base molds. The pattern of the runners extending from the junction with the sprue to each shape transfer section is configured in two intersecting directions. A cavity is of a rectangular outer shape when seen from a pressure contact surface side.

Abstract: A molding machine includes a fixed mold and a movable mold. The molding machine is a so-called micro-molding machine which provides less than 1.5 KN of the mold clamping force for clamping the fixed mold and the movable mold. A positional shift length between both molds is preset at ±20 ?m or less. Further, cavities are inserted in base molds of both molds respectively. Furthermore, cores are inserted in the cavities. The position of each cavity is adjustable with respect to each associated base mold. The position of each core is also adjustable with respect to each associated cavity. Moreover, the molding machine can simultaneously mold a plurality of optical components.