Patent application number | Description | Published |
20080317476 | Vehicle-Mounted Optical Communication System and Vehicle-Mounted Optical Transmitter - A vehicle-mounted optical communication system, which uses an optical signal to perform data transmission, comprises a first optical transmitter and an optical receiver. The first optical transmitter, which is mounted on a vehicle, has a multiple quantum well structure, in which an active layer has a quantum well layer of In | 12-25-2008 |
20090028201 | OPTICAL COMMUNICATION SYSTEM AND OPTICAL TRANSMITTER - An optical communication system for performing data transmission with optical signals comprises a first optical transmitter and a first optical receiver. The first optical transmitter has a first surface-emitting laser including an active layer of a multiple quantum well structure having a quantum well layer of In | 01-29-2009 |
20090078040 | FLOW SENSOR AND MANUFACTURING METHOD THEREFOR - A flow sensor may be formed by bonding a sensor chip formed with a flow rate detecting part and a flow path-forming member that is provided on the sensor chip and is formed with a flow path for a fluid flowing in the flow rate detecting part to each other on the upper surface of a substrate. The flow path-forming member may be formed by bonding a transparent first flow path forming member and a second flow path-forming member to each other. The first flow path forming member has a plate shape, and is provided with an inflow port and a outflow port for the fluid to be measured, and the second flow path forming member has a plate shape, and is provided with a through hole that forms the flow path along the flow of the fluid flowing along the flow rate detecting part. | 03-26-2009 |
20090080488 | SURFACE EMITTING LASER - A surface emitting laser including a semiconductor substrate, a semiconductor substrate, a first reflector formed on the semiconductor substrate, an active layer formed on the first reflector, a tunnel junction layer formed above a part of the active layer, a semiconductor spacer layer which covers the tunnel junction layer, a second reflector formed on the semiconductor spacer layer in a region above the tunnel junction layer, a first electrode formed in the periphery of the second reflector on the semiconductor spacer layer, and a second electrode electrically connected to a layer lower than the active layer, wherein a layer thickness of the semiconductor spacer layer in the region directly above the tunnel junction layer is thinner than the layer thickness of the semiconductor spacer layer in the region directly below the first electrode. | 03-26-2009 |
20100020835 | SURFACE EMITTING LASER - A surface emitting laser is provided with a first multilayer Bragg reflecting mirror including a first layer, a second multilayer Bragg reflecting mirror including a second layer, and an optical resonator unit that is held between these multilayer Bragg reflecting mirrors and includes an active layer. Further, the optical resonator unit contacts with the first layer and second layer respectively. The effective refraction index n | 01-28-2010 |
20100034233 | SURFACE-EMISSION TYPE SEMICONDUCTOR LASER - The present invention provides a surface-emission type semiconductor laser wherein an effective length of a cavity is reduced, thereby enabling to realize a higher-speed direct modulation. In the surface-emission type semiconductor laser according to the present invention, when supposing the optical path length (L) of a resonator part relative to a lasing wavelength λ | 02-11-2010 |
20100054290 | SURFACE EMITTING LASER - VCSELs with a conventional oxide-confined structure have problems to be solved for the purpose of reducing the internal stress and thermal resistance of the device. In particular, the problems should be solved in order to achieve the high reliability of the high-speed modulation-type VCSELs. A surface emitting laser according to an embodiment of the present invention comprising a single current injection opening area, which is provided in a mesa and electrically and optically isolated, wherein the laser comprises: an active layer for emitting light resulted from current injection; a first reflector and a second reflector provided so as to sandwich the active layer between the reflectors, an n electrode and a p electrode for injecting current into the active layer, an ion-implanted nonconductive high-resistance area provided so as to surround the current injection opening area, and | 03-04-2010 |
20100089146 | FLOW SENSOR - A package is configured by stacking a flat board whereupon a rectangular hole for storing a sensor chip is formed, a flat board whereupon a hole section to be a package inner channel for introducing a measurement target gas into the sensor chip is formed, and a flat board whereupon hole sections which communicate with the package inner channel as an inlet and an outlet of the measurement target gas on the same end surface of the package are formed. | 04-15-2010 |
20100139389 | SENSOR, SENSOR TEMPERATURE CONTROL METHOD AND ABNORMALITY RECOVERY METHOD - A heater pattern is arranged on at least one substrate among substrates configuring a package, and a temperature in the package is controlled by controlling a quantity of electricity carried to the heater pattern corresponding to the ambient temperature of a sensor chip in the package. | 06-10-2010 |
20110149381 | Gain-clamped semiconductor optical amplifier - A gain-clamped semiconductor optical amplifier according to the present invention has a pair of DBR areas | 06-23-2011 |
20130266847 | LITHIUM SECONDARY BATTERY - The object of an exemplary embodiment of the invention is to provide a lithium secondary battery which has high energy density by containing a positive electrode active substance operating at a potential of 4.5 V or higher with respect to lithium and which has excellent cycle property. An exemplary embodiment of the invention is an lithium secondary battery, which comprises a positive electrode comprising a positive electrode active substance and an electrolyte liquid comprising a nonaqueous electrolyte solvent; wherein the positive electrode active substance operates at a potential of 4.5 V or higher with respect to lithium; and wherein the nonaqueous electrolyte solvent comprises a fluorine-containing phosphate represented by a prescribed formula. | 10-10-2013 |
20140023935 | LITHIUM SECONDARY CELL - Provided is a lithium secondary cell of 5V class having a positive electrode operating voltage of 4.5V or higher with respect to metallic lithium; the lithium secondary cell has high energy density, inhibits degradation of the electrolytic solution that comes in contact with the positive electrode and the negative electrode, and has particularly long cell life when used under high-temperature environments. The positive electrode contains, as the positive electrode active substance, a predetermined lithium-manganese oxide complex; the negative electrode contains, as the negative electrode active substance, graphite, of which surface is coated by low-crystallinity carbon; and the electrolytic solution contains one or more high-oxidation-potential solvents selected from propylene carbonate, butyl ene carbonate, 4-fluoro-1,3-dioxolan-2-one, and 4,5-difluoro-1,3-dioxolan-2-one within a range of 5 to 60 vol % of the solvent and one or two low-viscosity solvents selected from dimethyl carbonate and fluorinated cyclic ether. | 01-23-2014 |
20140134461 | SECONDARY BATTERY - A secondary battery having high heat dissipation ability is provided. A secondary battery including a plurality of positive electrodes and a plurality of negative electrodes in an outer package, wherein the plurality of positive electrodes are connected to each other outside the outer package without being connected to each other inside the outer package, or wherein the plurality of negative electrodes are connected to each other outside the outer package without being connected to each other inside the outer package, or wherein the plurality of positive electrodes are connected to each other outside the outer package without being connected to each other inside the outer package and the plurality of negative electrodes are connected to each other outside the outer package without being connected to each other inside the outer package. In addition, the secondary battery, wherein the plurality of positive electrodes are connected to each other outside the outer package without being connected to each other inside the outer package, the outer package includes an electrolytic solution containing an additive, the plurality of positive electrodes contain lithium, and the plurality of positive electrodes are connected to each other outside the outer package after a potential is applied to at least one positive electrode between the plurality of positive electrodes until a potential equal to or less than a potential at which the additive is reductively decomposed is reached. | 05-15-2014 |