138results about How to "Shorten the conduction path" patented technology

A probe card cooling assembly for use in a test system includes a package with one or more dies cooled by direct cooling. The cooled package includes one or more dies with active electronic components and at least one coolant port that allows a coolant to enter the high-density package and directly cool the active electronic components of the dies during a testing operation.

A heat sink and a heat sink assembly that includes the heat sink and a source of flowing air, such as a fan. The heat sink includes a base from which a first plurality of convective surfaces extends. At least one heat pipe is in thermal contact with the base and extends therefrom. The heat pipe includes an evaporator portion in thermal contact with the base and a condenser portion. A second plurality of convective surfaces is in thermal communication with the condenser portion of the heat pipe.

A package structure in which a coreless substrate has direct electrical connections to a semiconductor chip and a manufacturing method thereof are disclosed. The method includes the following steps: providing a metal carrier board having a cavity; placing a chip having a plurality of electrode pads on an active surface in the cavity of a board; filling the cavity with an adhesive for fixing the chip; forming a solder mask on the active surface of the chip and the surface of the metal carrier board at the same side, wherein the solder mask has a plurality of openings to expose the electrode pads of the chip; forming a built-up structure on the solder mask and the exposed active surface of the chip in the openings; and removing the metal carrier board. In this method the metal carrier board can support the built-up structure to thereby avoid warpage.

The invention discloses a Co3O4 nano lamellar material and a preparation method and application thereof. The preparation method comprises the following steps of: mixing cobalt salt, a surfactant, a precipitator and deioned water in stoichiometric ratio; transferring the mixed solution into a reaction kettle and carrying out hydro-thermal reaction for 17.5-18.5 hours at 115-125 DEG C; and then washing and drying to obtain a powdery mixed precursor; and carrying out heat treatment on the powdery mixed precursor in air to finally obtain the Co3O4 nano lamellar material. The prepared Co3O4 material is of a regular nano lamellar structure, and can be applied to the negative electrode of a chargeable lithium ion battery so as to improve the storage capacity of lithium.

To provide a light emitting element mounting wiring substrate having a light emitting element mounting section on a substrate main body having a front surface and a back surface, and a confined component electrically connected to the light emitting element, such that the confine component does not obstruct the optical path of the light emitted from the light emitting element, resulting in uniform distribution of light intensity. The light emitting element mounting wiring substrate (1a) includes a substrate main body (2) which has a front surface (3) and a back surface (4) and which includes at least an insulating substrate (2a), and a plurality of element terminals (13, 14) formed on the front surface (3) of the substrate main body (2), at least one of the element terminals having a light emitting element mounting section (fa) on the top surface thereof, wherein the wiring substrate has a Zener diode (confined element) (10) embedded in the substrate main body (2), which element is electrically connected to a light emitting element (20) mounted on the mounting section (fa) and prevents application of overvoltage to the light emitting element (20).

The invention relates to a preparation method for an ordered ultra-thin electrode of a proton exchange membrane fuel cell. The preparation method comprises the steps of preparing an ordered electrode structure and establishing an ultra-thin catalyst layer; a process of impregnating and annealing is carried out on a carbon paper to obtain TiO<2> seed crystals; then a TiO<2> nanorod is grown through a hydrothermal method; a TiN ordered array is prepared through NH<3> etching; and the array is loaded with a catalyst to establish the ordered ultra-thin catalyst layer without containing a proton conductor (such as Nafion). The established ordered ultra-thin catalyst layer can be used for the proton exchange membrane fuel cell, other fuel cells and electrochemical devices.

The invention belongs to the field of microalgae cultivation, and particularly relates to a microalgae half-dry solid state adherent cultivation device for alternate illumination of bright and dark light. The microalgae half-dry solid state adherent cultivation device comprises a bracket system, an adherent cultivation unit, a speed regulating motor, a liquid supplement pipe, a liquid collection tank and a peripheral protection cover, wherein the adherent cultivation unit is arranged on the bracket system and is connected with the speed regulating motor; the liquid supplement pipe is arranged above the adherent cultivation unit, and the liquid collection tank is arranged below the adherent cultivation unit; the liquid collection tank is internally provided with a liquid circulating pump, a liquid supplement device and a carbon supplement device; the liquid circulating pump is connected with the liquid supplement pipe through a pipeline; and the peripheral protection cover is arranged on the periphery of the bracket system and the adherent cultivation unit; and the top surface of the protection cover is made of a light-passing material. The device utilizes the principle of bright and dark flashing light to dilute the bright light and improve the utilization efficiency of luminous energy, thereby improving the yield of microalgae biomass.

The invention provides a three-dimensional nanometer porous copper/two-dimensional cuprous oxide nanosheet array type lithium ion battery negative electrode. The lithium ion battery negative electrode comprises a three-dimensional nanometer porous copper substrate and a cuprous oxide nanosheet array layer, the three-dimensional nanometer porous copper substrate is used as a current collector, the cuprous oxide nanosheet array layer is used as an active lithium storage layer, the cuprous oxide nanosheet array is arranged on a surface of the substrate and is integrated with the substrate, and the cuprous oxide nanosheet array layer comprises cuprous oxide nanosheets formed on the substrate through in-situ growth, and the cuprous oxide nanosheets are perpendicular to the three-dimensional nanometer porous copper substrate and are arranged in a staggered manner to form an array structure. By the lithium ion battery negative electrode, the cycle performance and the specific capacity of the lithium ion battery can be improved. The invention also provides a one-step preparation method of the abovementioned lithium ion battery negative electrode. By the method, the production process of the lithium ion battery negative electrode can be effectively simplified.

A circuit board structure with optoelectronic component embedded therein comprises a carrier board with at least two through openings; a first optoelectronic component and a second optoelectronic component disposed in the openings respectively, wherein a plurality of electrode pads and optical active areas are formed on the active surfaces of the optoelectronic components; a dielectric layer formed on a surface of the carrier board and the active surface of the optoelectronic components, wherein a plurality of vias for exposing the electrode pads and two holes for exposing the optical active areas are formed in the dielectric layer; a circuit layer formed on a surface of the dielectric layer and electrically connected to the electrode pads of the optoelectronic components; an insulating protecting layer formed on the dielectric layer and the circuit layer; and at least one optical transmission element formed on a surface of the insulating protecting layer.

The invention discloses a bigrid power MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) device, belonging to the technical field of semiconductor power devices. According to the invention, on the basis of a common bigrid LDMOS (Laterally Diffused Metal Oxide Semiconductor) device, by means of extending a drain-electrode contact area connected with drain-electrode metal to a place below an active layer to form a longitudinal drain-electrode contact area (12a) and introducing a layer of heavily-doped buried layer namely a transverse drain-electrode contact area (12b) connected with the lower end of the longitudinal drain-electrode contact area (12a) between the active layer and the substrate, a current conduction path is shortened; meanwhile, a bigrid structure is adopted to form a double-current channel, so that the current flow area is enlarged, and on-resistance and power consumption are reduced greatly; and compared with the devices with the same transverse dimensions, the device disclosed by the invention is slightly reduced in withstand voltage.

The invention discloses a manufacturing method of a membrane electrode of a novel ultrathin proton exchange membrane fuel cell, and the method comprises the following manufacturing processes: firstly manufacturing a piece of hydrophobic carbon paper, then sputtering a nickel catalyst layer on the carbon paper, using a plasma enhanced chemical vapor deposition method to manufacture a directional carbon nano tube, and sputtering platinum nano particles or platinum ruthenium particles on the directional carbon nano tube to form an electrode; then depositing a plasma polymerized proton exchange membrane on an electrode surface; and finally assembling two plasma polymerized proton exchange membranes with electrodes into the membrane electrode of the novel ultrathin proton exchange membrane fuel cell. The plasma polymerized proton exchange membrane is ultrathin in structure and capable of improving the usage rate of the catalyst, reducing the contact resistance of the membrane and the electrode and the conducting path of the proton, and improving the performance of the fuel cell, and has self-humidifying capacity so as to reduce the production cost of the fuel cell. By using a drying plasma technology, the manufacturing method has the characteristics of environmental friendliness and low cost.

The invention discloses a chrysanthemum-shaped cobaltosic oxide (Co3O4) material and a preparation method and application thereof. The preparation method comprises the following steps of: mixing cobalt salt, a surface active agent, a precipitating agent and a solvent in a stoichiometric ratio; putting a mixed solution into a reaction kettle and performing hydro-thermal reaction at the temperature of 95 to 105 DEG C for 7.5 to 8.5 h; washing and drying, and thus obtaining a powdery mixed precursor; and performing heat treatment on the powdery mixed precursor in air, and thus obtaining the chrysanthemum-shaped Co3O4 material. The obtained chrysanthemum-shaped Co3O4 material has better electrochemical performance and is applicable to a cathode of a rechargeable lithium ion battery.

The invention discloses a ventilation type air cooling magnetic liquid sealing device and belongs to the field of mechanical engineering sealing. The ventilation type air cooling magnetic liquid sealing device successfully solves the problems that when the online speed of an existing magnetic liquid sealing device is larger than 20 m/s, the heating amount of magnetic liquid in a sealing gap is larger, the service life is shortened, and the magnetic liquid even fails. The ventilation type air cooling magnetic liquid sealing device comprises a shell (2), a first pole shoe (3), a first permanent magnetic body (4), a second pole shoe (5), a second permanent magnetic body (6), a third pole shoe (7), a shaft sleeve (10), a ventilation connector (12) and other parts. According to the ventilation type air cooling magnetic liquid sealing device, a cooling circulating channel for cooling air to circulate is formed among the ventilation connector (12), the shell (2), a ventilation hole in the second permanent magnetic body (6), a sealing cavity II and a shaft sleeve (10). The channel can ensure cooling of magnetic liquid under all pole teeth, conduction paths are reduced, and the cooling circulating efficiency is improved.

The invention especially relates to a solid electrolyte structure and a preparation method thereof, and a lithium battery, belonging to the technical field of lithium batteries. The solid electrolytestructure of the invention comprises a polymer lithium salt composite membrane and an inorganic porous membrane, wherein the inorganic porous membrane has a plurality of pore channels which are filledwith the polymer lithium salt composite membrane. The solid electrolyte structure provided by the invention integrates the characteristics of good structural flexibility and contact interface performance of an organic polymer solid electrolyte and the characteristics of high security and structural stability under high-voltage conditions of an inorganic solid electrolyte, so an all-solid-state lithium battery with good performance can be designed. A preparation method for a solid electrolyte in the invention can efficiently prepare an organic-inorganic hybrid solid electrolyte, is simple in process flow and can meet the demands of large-scale production and manufacturing.

The invention relates to an ordered catalyst layer of a proton exchange membrane fuel cell. Fe, Co, Ni or alloy thereof is loaded on the surface of stainless steel, and then a carbon layer is prepared on the surface of the stainless steel through a CVD method. Then, an ordered PPy array is formed on the surface of the carbon layer through in-situ polymerization by an electrochemical polymerization method, so that the PPy array has the characteristic that the PPy array grows approximately perpendicular to the surface of the carbon layer. One or two kinds of metal are firstly loaded on the array, and then the PPy array coated with a catalyst is transfer-printed on a Nafion film, so that an ordered thin catalyst layer is constructed. The catalyst layer prepared with the method does not contain a proton conductor (such as Nafion), and the constructed ordered catalyst layer can be used for proton exchange membrane fuel cells, alkaline fuel cells and solid polymer water electrolysis pools.

A semiconductor device integrated with optoelectronic components includes a carrier board with at least two openings; a first and a second optoelectronic component disposed in the openings respectively, each of them having an active surface and an opposite non-active surface, wherein the active surface has a plurality of electrode pads and an optical active area; a dielectric layer formed on a surface of the carrier board and the active surfaces, and having a plurality of vias and openings to expose the electrode pads and the optical active areas respectively; and a circuit layer formed on a surface of the dielectric layer and electrically connected to the electrode pads directly. Then, at least one waveguide is formed on the surface of the semiconductor device integrated with the optoelectronic component to provide signal transmitting between the first and second optoelectronic components, therefore, shortens the signal transmission path, reduces the transmission loss and noise, and hence improves the signal transmission quality.

The invention discloses a back passivation matrix dot type laser grooving conductive structure. The structure comprises a silicon wafer substrate, wherein the back face of the silicon wafer substrateis provided with lamination back passivation film, and back electrode main gate regions are arranged at intervals on the lamination back passivation film; laser grooving is carried out on non-back electrode main gate regions on the lamination back passivation film through a lamination back passivation film in a wave band of 500-1200 nanometers to from a repeating dot group structure unit, whereinthe repeating point group structure unit is composed of 2-18 circular-aperture-shaped laser spots overlapping 3%-17% of a circular area region, and the intervals of center points of the repeating point group structure unit are 0.2-1.0 millimeters. The laser grooving conductive structure has the advantage that a back conduction plane can be divided into smaller conductive structure units, so that the photo-generated current conduction path is shortened, the transmission collecting capacity of current carriers is improved, lattice damage and composite damage of the battery silicon wafer substrate caused by the laser grooving can be reduced, and the photovoltaic conversion efficiency and assembly reliability of single polycrystalline silicon back passivation local back contact solar cell areimproved.