108results about How to "Stable conduction" patented technology

The invention provides a gate driver capable of stably turning on a switching element without varying a turn-on switching characteristic or causing a power loss. As a solution, the gate driver turns on / off a switching element Q1 by applying a control signal from a controller to a gate of the switching element which has the gate, a drain, and a source and contains a wide-bandgap semiconductor. The gate driver includes a parallel circuit that includes a first capacitor (C1) and a first resistor (R1) and is connected between the controller and the gate of the switching element and a short-circuit unit (S4) that is connected between the gate and source of the switching element and short-circuits the gate and source of the switching element after a delay from an OFF pulse of the control signal.

The invention relates to an electroplating clamp which comprises a main clamp and an auxiliary clamp which are integrated through a pin roll, a main chuck and an auxiliary chuck, a main clamp handle and an auxiliary clamp handle, wherein the main chuck and the auxiliary chuck are opposite to each other and are formed on the front end of the electroplating clamp, the main clamp handle and the auxiliary clamp handle are opposite to each other and are formed on the rear end of the electroplating clamp, an elastic element is arranged between the main clamp handle and the auxiliary clamp handle so that the main chuck and the auxiliary clamp can get close, each of the main chuck and the auxiliary chuck is covered with an insulation jacket, an electrode conduction contact surface is formed between the main chuck and the auxiliary chuck, and the insulation jackets surrounding the periphery of the electrode conduction contact surface form a relatively clamping ring edge. The electroplating clamp has the beneficial effect that electrode conduction is not influenced because a clamp nozzle is isolated from the outside during use, has the advantages of simple structure, long service life and high conduction efficiency, and can fully guarantee the electroplating quality of a circuit board.

The invention discloses a spliced part. The spliced part comprises a plurality of splicing blocks. Each splicing block is a cube with six surfaces, wherein identical magnetic assemblies are arranged on the six surfaces. Any two surfaces of any one splicing block and any two surfaces of another splicing block can be spliced through attractive force of the magnetic assemblies in a four-side-coinciding mode. According to the spliced part, the cubic splicing blocks are adopted, the magnetic assemblies are arranged on all surfaces of each splicing block, the six surfaces of each splicing block can be spliced with the surfaces of other splicing blocks in all directions through the attractive force, the splicing methods are various, various shapes can be spliced, splicing can be achieved more easily due to the magnetic method, and the spliced part is more interesting. The spliced part is an unparalleled innovation in the field of spliced parts and has great market prospect.

[Problems] To provided an adhesive composition for semiconductor that permits handling without an occurrence of cracking or peeling off even when being flexed, that at the time of laminating, permits laminating on the electrode side of a semiconductor wafer provided with bump electrodes of which bump electrodes have a narrow pitch and a high pin proportion, that at the time of dicing, permits a high-speed cutting without any dicing dust contamination or defect, and that facilitates detection of alignment marks at the time of dicing and flip chip assembly.[Means for Solving Problems] There is provided an adhesive composition for semiconductor comprising an organic-solvent-soluble polyimide (a), an epoxy compound (b) and a hardening accelerator (c), wherein per 100 wt parts of the epoxy compound (b), there are contained 15 to 90 wt parts of the organic-solvent-soluble polyimide (a) and 0.1 to 10 wt parts of the hardening accelerator (c), wherein the epoxy compound (b) contains a compound being liquid at 25° C. under 1.013×105 N / m2 and a compound being solid at 25° C. under 1.013×105 N / m2, and wherein a ratio of compound being liquid based on all the epoxy compounds is 20 wt % or more and 60 wt % or less.

A latch relay includes a frame, a bobbin installed in the frame and having a coil wound therearound, first and second yokes provided as magnetic bodies, a rotary mover rotating in a clockwise direction or in a counterclockwise direction between head portions of the first and second yokes, first and second fixed contactors installed to be spaced apart from one another and parallel to each other within the frame, a movable contactor having one end connected to the second fixed contactor, a transmission lever having one end coupled to one side of the rotary mover to make a vertical movement, a support member fixedly installed on one side of the transmission lever, and an elastic member providing contact force such that the movable contactor is brought into contact with the first fixed contactor or separated from the first fixed contactor, while moving according to a movement of the transmission lever.

The invention discloses a preparation method of a positive electrode of a lithium battery. According to the method, modified lithium nickel manganese oxide is adopted as a positive active material, so that the chemical stability is good, the capacity is high, the positive electrode can be well matched with an aqueous electrolyte; the reaction rate of side reaction is suppressed; the resistance of the overall positive electrode can be reduced by a conductive agent; and meanwhile, a conductive path among positive active material particles is strengthened. The material of a positive current collector is selected from one of a carbon-based material, a metal or an alloy. The carbon-based material is adopted as the positive current collector for the method, so that the positive electrode can play a role in stably collecting and conducting electrons in battery charging and discharging processes, and does not participate in battery reaction; and stable performance of the battery is ensured.

A mounting board of the invention includes: an insulative base; a plurality of first conductive elements provided on the insulative base and having lands; a plurality of second conductive elements disposed on the lands; a plurality of solder pieces each disposed on each of the second conductive elements; and an electronic component which includes electrode sections each contacting each of the solder pieces, wherein the first conductive elements are made from a first element that contains at least silver; the second conductive elements are made from a second element that contains at least copper; and the solder pieces are made from a third element that contains at least tin.

An electrical connector connecting a male connector and a female connector in a freely engageable and detachable manner includes, a male tab is provided at the male connector; a housing part where the male tab is inserted is provided at the female connector; a contact piece and a beat piece to hold and press the male tab to enable electrical connection are provided at the housing part; and a protrusion is provided at least at one of the contact piece and the beat piece, and a recessed part capable of accepting the protrusion is provided at the male tab, wherein the contact piece, the beat piece, and the protrusion are constituted to be one component.

An adhesive composition for semiconductor containing an organic-solvent-soluble polyimide (a), an epoxy compound (b) and a hardening accelerator (c), wherein per 100 wt parts of the epoxy compound (b), there are contained 15 to 90 wt parts of the organic-solvent-soluble polyimide (a) and 0.1 to 10 wt parts of the hardening accelerator (c), wherein the epoxy compound (b) contains a compound being liquid at 25° C. under 1.013×105 N / m2 and a compound being solid at 25° C. under 1.013×105 N / m2, and wherein a ratio of compound being liquid based on all the epoxy compounds is 20 wt % or more and 60 wt % or less.

A coaxial connector and a method for providing a normal force in an electrical connector. The coaxial connector includes a first terminal having a first contact portion and a second terminal having a second contact portion. Before an external device is inserted into the coaxial connector for the first time, the first contact portion and the second contact portion form a first relative positional relationship. After the external device is disengaged from the coaxial connector, the second contact portion urges against the first contact portion upwards to form a third relative positional relationship. The third relative positional relationship is different from the first relative positional relationship.

A substrate of the present invention is provided with: a laminated wiring board wherein a conductive layer is formed; a through hole penetrating the laminated wiring board; a through hole plating (7)electrically connected to the conductive layer; and a metal piece (10) disposed on the inner side of the through hole plating (7). In the side surface of the metal piece (10), a protruding section (8)directly in contact with the through hole plating (7), and a separated section (9) at a position separated from the through hole plating (7) are formed, and a space surrounded by the separated section (9) and the through hole plating (7) is covered with a metal plating film (13), and the inside of the plating film (13) is filled with a filling material (14).

The invention discloses a weak current system wire connector, and the connector comprises a power connection end, an end replacement box and a first heat dissipation block; the bottom of the power connection end is fixedly connected with a fixed plate, and the bottom of the fixed plate is fixedly connected with the end replacement box through screws; and the bottom of the end replacement box is fixedly connected with the first heat dissipation block. The invention relates to the technical field of wire connectors. According to the weak current system wire connector, the fixed plate is arrangedat the bottom of the power connection end, and the power connection end can be detached from the end replacement box through the screws, so that the power connection end is convenient to replace, thereby solving a problem that an electric connection copper pin is liable to be bent when the wire connector is in use and the head of the wire connector cannot be stably buckled. By fixedly connectinga rubber sealing ring to the top of the end replacement box and fixedly connecting a magnetic sealing ring to the top of the power connection end, the problems that water easily enters the power connection end of an existing wire connector, the safety accidents are easily caused in the using process and a circuit is easily short-circuited are solved.

The invention provides an intelligent dehydration device for corrugated paper production which comprises a bottom plate, supporting beams, a transverse plate, supporting rods, a corrugated paper waterabsorption frame structure, an auxiliary extrusion drying frame structure, a corrugated paper extrusion water outlet frame structure, a rotary cleaning frame structure, a support, a cross beam, a transmission roller, a conveying belt, driving motors, a rotary motor and a control box. The supporting beams are welded to the left side and the right side of the upper part of the rear end of the bottom plate; the transverse plate is connected to the upper parts of the front ends of the supporting beams through bolts; the supporting rods are in bolted connection to the left side of the upper part of the bottom plate; and the corrugated paper water absorption frame structure is arranged on the upper parts of the inner sides of the support rods. The intelligent dehydration device for corrugated paper production provided by the invention has the beneficial effects that through the arrangement of a rolling roller, the conveying belt and sponge mats, the rolling roller drives the conveying beltto rotate to guide corrugated paper to move leftwards, meanwhile, the sponge mats can absorb residual water in the corrugated paper, so that secondary dehydration of the corrugated paper is facilitated, the residual water in the corrugated paper is sucked out, and a dehydration effect of the equipment on the corrugated paper is improved.

The invention belongs to the field of oil and gas well fracturing, and discloses a clustering selective firing bridge shooting combined operation perforating module. The perforating module comprises aplurality of perforators and a plurality of detonator bins, and the perforators and the detonator bins are sequentially connected in a staggered mode; each perforator comprises a perforator shell, abullet carrier, a bullet carrier positioning device, a bullet carrier supporting device and a detonating cord, each detonator bin comprises a detonator bin shell and a detonator, and a contact pin isarranged at one end of the detonator. The wire-free design of the whole perforating module is achieved through a disc-shaped contact, the bullet carrier positioning device, the bullet carrier supporting device and the contact pin, the step of connecting wires inside a perforator, between the perforator and the detonator and between the detonator and a through wire when the bridge shooting combinedoperation perforating module is assembled on site is omitted, then the operation steps are simplified, the assembling efficiency is improved, the safety of the whole process is guaranteed, a side hole is not needed, and therefore the sealing aging is improved.

The invention provides an antenna coil device (100) including: a connector unit (10) mounted with a connector of an external circuit detachably by being plugged-in; and a base unit (30) provided with an antenna body (40) including a coil (42), in which the connector unit (10) and the base unit (30) are constituted by separate members and are used by being combined integrally each other, wherein for the connector unit (10) and the base unit (30), there are formed a connector fitting portion (12) and a base fitting portion (32) which are formed with a concave and a convex in a direction intersecting with respect to the plug-in direction of the connector unit (10), and by fitting the connector fitting portion (12) and the base fitting portion (32), the connector unit (10) and the base unit (30) are combined in a state in which the antenna body is positioned with respect to the connector unit (10).