43results about How to "Guaranteed Electrical Characteristics" patented technology

The invention discloses an unsealing method for a flip chip device. The method comprises the steps that a three-dimensional microscope is used for observing a device to be unsealed, and the appearance size, packaging thickness, packaging forms and packaging materials of the device to be unsealed are measured; one or more of a scanning acoustic microscope, a micro-focus X ray detector and a CT detector are selected to observe and record the device to be unsealed; the unsealing scheme of the device is determined according to the type of the device and the detecting results; embedding polishing or shell unsealing is used for carrying out unsealing pre-processing on the device to be unsealed; one or more of a mask etching method, a chemical etching method and a section microscopy method are used for carrying out chemical unsealing on the device to be unsealed; the interior technical parameters of the unsealed device are detected, evaluated and analyzed. Compared with a traditional unsealing method for a flip chip technology device, the unsealing method for the flip chip device has the advantages that the unsealing quality is greatly improved, and completeness and electrical characteristics of an unsealed silicon wafer are guaranteed.

The present invention discloses a compound material high power RF coaxial linker which comprises of inner conductor, crust, insulation, outer conductor, cable clip, rear thread sleeve and seal ring. Insulation is set between inner conductor and outer conductor, seal ring is set between crust and rear thread sleeve, crust coats on surface of outer conductor, cable clip and rear thread sleeve, the inner conductor and outer conductor on circuit are made from copper alloy, the crust and rear thread sleeve is made from aluminum alloy or stainless steel or project plastic. The present invention changes the original conductor made from copper alloy totally to conductor made from compound material, reduces cost under the premise of ensuring product capability, improves the market competition of products and meets the requirement of market.

An embodiment of the present invention provides a display backplane, a preparation method thereof, and a display device. The display backplane includes a substrate, a transparent heat conduction layerdisposed on the substrate, and an array structure layer disposed on the heat conduction layer. The array structure layer includes a light shielding layer, a first thin film transistor and a second thin film transistor, and the light shielding layer is disposed between the transparent heat conduction layer and the first thin film transistor. The transparent heat conductive layer comprises a transparent conductive layer, a transparent semiconductor layer or a transparent conductive layer and a transparent semiconductor layer. As that transparent heat conduction lay is arranged between the substrate and the array structure lay, the invention can effectively solve the problem that the characteristics of the driving thin film transistor and the switching thin film transistor of the prior OLEDdisplay device are separated.

The invention provides a wire for electronic components, comprising: a conductive substrate (1), a Sn alloy plating layer (2) of Sn and Bi, Cu, Ag or Sn and Zn covering its surface (front side), and forming a Zn alloy coating layer (2) on its upper layer. Plating layer, Ag plating layer, SnZn alloy plating layer, SnAg alloy plating layer, or upper layer plating layer of SnBi alloy plating layer (3). The concentration of Bi, Cu, Ag or Zn is set at 0.1 to 15% by weight, and the total thickness of the Sn alloy plating layer (2) and the upper layer plating layer (3) is set at 0.5 to 20 μm. Thereby, a lead wire for an electronic component having a tin-based plating layer, no toxic lead at all, low cost, and capable of reliably preventing whisker generation, and a flat cable composed of the lead wire are provided.

The invention provides a method for forming a semiconductor-device replacement gate and a method for manufacturing the semiconductor device. The method includes: providing a semiconductor substrate which includes an N-type area and a P-type area; forming a sacrifice-gate stack on each of the N-type area and the P-type area respectively, wherein each sacrifice-gate stack includes a sacrifice-gate dielectric and a sacrifice-gate electrode, the sacrifice-gate electrode is located on the sacrifice-gate dielectric and the sacrifice-gate electrode in the N-type area is higher than the gate electrode of the P-type area; forming a side wall around each sacrifice-gate stack; forming source-drain areas on the semiconductor substrate at the two sides of the sacrifice-gate stacks; removing the sacrifice-gate stack in the N-type area so as to form a first opening in the side wall; and forming an N-type replacement-gate stack in the first opening; removing the sacrifice-gate stack in the P-type area so as to form a second opening; forming a P-type replacement-gate stack in the second opening; and performing planarization until the N-type replacement-gate stack is exposed. The method is simple in process.

An elastic wave device comprises a piezoelectric substrate, an IDT electrode which is arranged on the piezoelectric substrate, a wiring electrode which is arranged on the piezoelectric substrate and is connected to the IDT electrode, a first insulating body which is arranged on the piezoelectric substrate and can seal the IDT electrode and the wiring electrode, a resin layer which is arranged on the first insulating body, an inductor electrode which is arranged on the resin layer, a second insulating body which is arranged on the resin layer and covers the inductor electrode, a terminal electrode which is arranged on the second insulating body, and a connection electrode which penetrates through the first insulating body, the second insulating body and the resin layer and electrically connects the wiring electrode, the terminal electrode and the inductor electrode to one another. The first insulating body comprises a resin and a filler dispersed in the resin. The density of the filler in the resin layer is smaller than the average density of the filler in the first insulating body. The elastic wave device secures the electric properties of an inductor and can have reduced fluctuations in the electric properties.

The invention discloses a preparation method of a low-thermal-resistance gallium nitride high-electron-mobility transistor epitaxial material, and belongs to the technical field of semiconductor epitaxial materials. According to the invention, the method comprises the steps: employing high-temperature chemical vapor deposition equipment for carrying out high-temperature etching on the surface of a silicon carbide substrate, so the surface of the substrate presents controllable atomic-scale step morphology; carrying out the atomic-scale aluminum nitride nucleation on silicon carbide atomic steps by utilizing a metal organic chemical vapor deposition technology; transversely and rapidly combining the aluminum nitride nucleation points in an intermittent source supply mode, and performing layered deposition, so high-quality nanoscale aluminum nitride nucleation layer growth is achieved, and the gallium nitride high-electron-mobility transistor is prepared by taking aluminum nitride as a substrate. According to the method, the thickness of the aluminum nitride nucleating layer can be greatly reduced, the interface thermal resistance introduced by the aluminum nitride nucleating layer can be effectively reduced, the heat dissipation characteristic of the gallium nitride power device can be improved, and the method has extremely important significance for improving the power performance of the gallium nitride microwave power device.

The invention relates to an overlying adhesive processing method for a motor rotor silicon steel sheet and belongs to the field of motor manufacturing. According to the method, an iron core which is not solidified is arranged on a special framework, a special heating device and a special pressurizing device are used, the iron core is solidified through repeatedly heating and pressurizing, a shot blasting device is used for performing shot blasting on the periphery of the iron core, a special tool is used for removing adhesive of the inner circumference of the iron core, the high accuracy of the iron core can be maintained by the aid of the iron core overlying adhesive processing method, and good function on guaranteeing electrical characteristics of a motor can be achieved.

The embodiment of the invention discloses an array substrate, a backlight module, a display panel, a display device and a preparation method. The array substrate comprises a plurality of driving units. Each driving unit comprises a first electrode, a second electrode and at least one thin film transistor; the first electrode and the second electrode are used for being connected with the anode andthe cathode of a light emitting diode respectively, so that the vertical projection of the light emitting diode on the array substrate can be overlapped with the at least one thin film transistor, andthe thin film transistor is located at the backlight side of the light emitting diode in the light emitting direction of the light emitting diode. The driving unit controls the light-emitting diode to be turned on or off according to the driving signal. According to the embodiment of the invention, the problem that an existing array substrate needs to be additionally provided with a shading layer, so that the preparation process is complex, is solved; the influence of external illumination on the thin film transistor can be avoided, masks and preparation procedures required for preparing theshading layer are saved, the preparation process of the array substrate is simplified, and the manufacturing cost is reduced.

The invention discloses a method for saving the area of a medium- and low-voltage VDMOSFET chip. Electrical properties of a VDMOS device can be guaranteed, and manufacturing cost is minimized. The method comprises the following steps: firstly, an active region (1a) and a non-corrosive region (1b) are formed on polycrystalline silicon through corrosion; a polycrystalline silicon region (2) is formed on the active region (1a) through deposition, and the polycrystalline silicon region (2) contains a polycrystalline silicon lead region (2a) and a polycrystalline silicon terminal structural region (2b); N+source regions (3) are formed below the polycrystalline silicon lead region (2a) and below the space between the polycrystalline silicon lead region (2a) and the polycrystalline silicon terminal structural region (2b) through diffusion; contact holes (4) are formed on the polycrystalline silicon region; a metal electrode (5) is formed on the active region (1a); the metal electrode (5) extends to cover all the contact holes (4); the contact holes (4) are connected to the N+source regions (3) through the metal electrode (5); and the metal electrode (5) and part of the polycrystalline silicon terminal structural region (2b) are overlapped.

The invention relates to a medium-low voltage switch cabinet and a servomotor drive mechanism thereof. The medium-low voltage switch cabinet specifically comprises a circuit breaker servomotor, a three-position switch servomotor and a PWM driver, wherein each moving contact of a circuit breaker is connected with a main shaft of the circuit breaker servomotor through a circuit breaker drive mechanism; the moving contact of a three-position switch is connected with the main shaft of the three-position switch servomotor through a three-position switch drive mechanism; and the PWM driver is in control connection with the circuit breaker servomotor and the three-position switch servomotor. According to the medium-low voltage switch cabinet, a motor mechanism is applied to a C-GIS product to replace a spring mechanism of a traditional circuit breaker, so that mechanical movement faults, such as incomplete closing and excessive closing force of traditional equipment are avoided; the faults, such as switch burnout caused by heating of the contacts of a conductive system are avoided; and meanwhile, the time-consuming and labor-intensive debugging and testing processes of the traditional equipment are also saved.

The invention discloses a flexible anti-aging shielding twisted pair cable and a preparation method thereof. The cable is characterized in that four twisted-pair wire cores and a cross-shaped fillingcore material are twisted together to form a cable core, the exterior of the cable core is coated with a fluororesin wrapping tape layer, an aluminum-plastic composite tape wrapping layer, a copper wire shielding winding layer and a silane grafted crosslinked high-density polyethylene insulating layer, the pair-twisted wire core is formed by pair twisting of two insulating wire cores, each insulating wire core comprises an inner conductor and a silane grafted crosslinked low-density polyethylene insulating layer, a nickel copper damage prevention coating and a zinc oxide barrier layer are sequentially sprayed outside the inner conductor and the copper wire shielding winding layer, the cross-shaped filling core material comprises a cross-shaped resin matrix and an aluminum foil layer, an aluminum-plastic composite belt wrapping layer is of an aluminum-plastic composite belt gap wrapping structure, and the aluminum-plastic composite belt comprises an aluminum foil belt outer layer and aPET resin belt inner layer. The cable is advantaged in that the cable effectively suppresses signal interference caused by crosstalk between the pair-twisted wire cores, can effectively suppress a copper damage phenomenon of an insulating layer, and has better mechanical strength, flexibility and electrical characteristics.

The invention discloses a temperature monitoring device, which comprises a heat isolation device, a data collection module and a data processing module, wherein a tested object is arranged outside theheat isolation device; the data collection module is arranged inside the heat isolation device and is used for collecting temperature signals of the tested object and converting the temperature signals into thermoelectromotive force signals; and the data processing module is connected with the data collection module and is used for converting the thermoelectromotive force signals into the temperature value. The temperature monitoring device has the advantages that through the arrangement of the heat isolation device, the temperature of the data collection module is kept below 60 DEG C, so that the electric characteristics of the data collection module are ensured; and the monitoring on the temperature in various high-temperature environment can be realized.

The invention discloses a preparation method of a heat shock-resistant ceramic capacitor and pertains to the field of electric elements and material technology, in particular to a preparation method of a ceramic capacitor; the preparation method comprises the steps: the preparation of transition electrodes is added into the conventional ceramic-capacitor preparation engineering; single-layer or multi-layer transition electrodes with different silver contents are prepared at two sides of a ceramic chip; due to the different silver contents in the transition electrodes and electrode materials, the thermal conductivities of the transition electrodes and electrode materials are different; therefore, thermal gradient exists between the transition electrodes, which can relieve the thermal stress produced by the synergy of the ceramic capacitor in an environment in which the temperature changes dramatically. On the basis of ensuring electrical characteristics of the ceramic capacitor, the preparation method significantly improves the heat shock resistance of the ceramic capacitor so that the ceramic capacitor can adapt to the environment in which the temperature changes between minus 55 DEG C to 125 DEG C and particularly meets the performance requirements of a special ceramic capacitor in automotive electronics.

This invention provides a instantaneous voltage detection circuit for electronic system containing power supply and grounding socket, said circuit containing a capacitance device, a rectification component, a preset resistance element and a detection element, wherein the capacitance device containing a first end coupling to a grounding socket of an electronic system and a second end series coupling to power supply socket through rectification component whose positive operation direction pointed to said capacitance device. When the instantaneous voltage occurs in power supply socket and the voltage in second end of said capacitance device is higher than threshold voltage, the detection element outputting a voltage to represent the generation of said instantaneous voltage.

The invention provides a PTC (positive temperature coefficient) ring production method. A PTC ring is a circular plate in a dimension of the outer diameter D, the inner diameter d and the thickness and comprises two metal foils and a PTC material layer. The PTC material layer is positioned between the two metal foils, and the upper metal foil, the lower metal foil, an upper metal nickel and a lower metal nickel are assembled into a battery cap to form a component which is connected with a power source to form a conductive loop. The production method includes steps: firstly, using macromolecule-based PTC as the PTC ring, using a twin-screw extruder for extruding and pelleting, and using a single-screw extruder to extrude the generated pellets into a laminated core; secondly, compositing the laminated core with the conductive metal foils, and cooling, thirdly, using gamma-ray (Co60) or electron beams to irradiate the composite plate; fourthly, stamping the irradiated cross-linked composite plate into a circular chip in a target dimension; and fifthly, subjecting the circular chip to thermal shock to obtain the finished PTC ring.

The invention provides a pipe gallery type jumper supporting structure, which comprises a sleeve and a plurality of wire supports connected with the sleeve, wherein the wire support is used for fixing a plurality of wires of the jumper in the sleeve; during installation, the wires are fixed on a wire clamp of the wire support, and the wire clamp holds the wires under the action of a built-in spring; and the sleeve of the pipe gallery type jumper supporting mechanism is arranged on the outer side of the wire in a sleeving mode and fixed to a fixing support of a hanging support through a fastener, and finally a sealing end cover is covered and fastened through the fastener. The electrical characteristics of the jumper can be stably and effectively ensured, the phenomena of discharge and the like caused by irregularity of the jumper are reduced, and the electrical performance of the jumper is improved.