37results about How to "Extended heat conduction path" patented technology

The invention discloses a novel high-power semiconductor chip or device (including a GaN-based light-emitting diode) upside-down welding assembly and a lamp, as well as a low-cost wafer-level upside down welding manufacturing process. It belongs to the technical field of semiconductor optoelectronics. The invention includes: the epitaxial layer of the semiconductor chip or device is welded upside down to the substrate, the substrate wafer is peeled off, electrodes of a specific shape are deposited on the epitaxial layer, the semiconductor chip or device is cut into a combination of upside down welding, and a new type of lamp is designed so that Reduce total internal reflection. The advantages of the present invention are: (1) The manufacturing process is simple; (2) No need for expensive chip-level flip welding equipment; (3) High production efficiency; (4) Good heat dissipation efficiency; (5) Current distribution Uniform, the current density is increased; (6) the light extraction efficiency is improved; (7) the total internal reflection is removed.

A consumable for a plasma arc torch, such as a nozzle, having a body and a head defining a shoulder portion having a frusto-conical portion and a flared portion. The flared portion increases the cross-sectional thickness to provide a greater heat-conduction path for removal of heat generated by a plasma arc, thereby extending consumable life. The frusto-conical portion provides a sharper, pointier nozzle head to simultaneously increase the operator's visibility of the workpiece. Methods of making and using the consumables are also included.

The invention discloses a hollow cathode assembly and belongs to the field of a vacuum electronic technology. The assembly comprises a heater insulating barrel which is used as a hollow cathode, and a heat shielding barrel, wherein the heat shielding barrel is provided with a heat isolating groove; and a cathode tube is internally provided with single-hole and multi-hole inner separation rings which are alternatively arrayed. According to the hollow cathode assembly, the heater insulating barrel is arranged on the heat shielding barrel so as to reduce the contact area, reduce conduction heat energy, prolong a heat conduction path and reduce cathode heat energy loss; and the heater insulating barrel is arranged and is not reacted with a heater at a high temperature, so that the service life of the heater is prolonged, the service life of a cathode is prolonged and the hollow cathode assembly is applicable to majority of heat cathodes.

The invention discloses a pot rack for preventing fragmentation of a glass panel. The pot rack comprises an upper pot rack and a lower pot rack. The lower pot rack comprises a space ring, a bottom ring and a plurality of pot rack supporting legs. The space ring is fixed to the bottom ring through the pot rack supporting legs. The upper pot rack comprises a pedal which is arranged on the space ring. By arranging the upper and lower pot racks, heat, conducted downward, of the pot bottom is reduced.

The embodiment of the invention provides an axle temperature monitoring method and system for a railway vehicle, and relates to the field of axle temperature measurement; the axle temperature monitoring method comprises the following steps: each electronic tag measures and stores the axle temperature of the railway vehicle where each electronic tag is located based on an electric energy acquisition condition and a corresponding electric energy acquisition time of each electronic tag, wherein each electronic tag also stores pre-stored data comprising a tag TID / EPC code, temperature calibrationdata, and data related to an axle number, a bearing position number, an axle model, a bearing model and the like where a tag installation position is located; an electronic tag reader obtains the axletemperature and pre-stored data of the railway vehicle where each electronic tag is located, wherein the axle temperature and pre-stored data are stored in each electronic tag; and alarm informationis determined based on the axle temperature of the railway vehicle acquired by the electronic tag reader, the pre-stored data and a preset temperature alarm threshold value of the bearing position number. According to the method and system, the temperature measurement time can be reduced, and the temperature can be accurately monitored.

The invention belongs to the field of aqueous coatings and in particular relates to an ultrathin fireproof aqueous coating and a preparation method thereof. When the ultrathin fireproof aqueous coating is prepared, a component A and a component B are added, the component A comprises an aerogel precursor, stepless powder and the like, and the component B is used as a binding agent. The aerogel precursor is adopted as a core raw material to prepare the fireproof aqueous coating; as an aerogel material is of a nano three-dimensional structure and has characteristics that a solid heat conduction route is effectively prolonged, gas convective heat transfer is inhibited and thermal radiation is reduced, an aerogel fireproof coating made of the aerogel material has a thermal insulation property which is incomparable by conventional materials; after being applied to a steel material and dried, the ultrathin fireproof aqueous coating provided by the invention is relatively high in mechanical strength, achieves a fireproof grade A1, additionally has relatively good advantages of being waterproof and low in cost, and provides a novel material for buildings, environmental protection and industrial energy conservation.

The invention discloses a high thermal conductivity composite material and its preparation and application, belonging to the field of thermal conductivity composite materials. The invention mixes two-dimensional nanomaterials, liquid metal and cellulose nanofibers in water, then puts the mixed solution in an ultrasonic cell breaker, performs ultrasonic treatment on the mixed solution, and finally centrifuges and dries to obtain the thermally conductive filler. Subsequently, the obtained thermally conductive filler is dispersed in the polymer matrix to prepare a high thermally conductive composite material. The high thermal conductivity composite material of the present invention has good mechanical properties, excellent thermal conductivity and excellent flexibility, and has a wide range of applications in heat dissipation of electronic components, heat dissipation of printed electronics, and heat dissipation of 5G communication equipment.

The invention discloses a semiconductor structure and a manufacturing method. In the semiconductor structure, conductive through holes and a radiation layer are arranged on the periphery of the back side of a lower chip for improving the bonding strength of a radiation fin assembled subsequently and for providing a good heat conducting path for improving the radiation efficiency of the semiconductor structure. The invention also provides a manufacturing method of the semiconductor structure.