Carrier-free bottom electrode integrally-formed power inductor and manufacturing method thereof
A bottom electrode, power inductor technology, applied in inductor/transformer/magnet manufacturing, transformer/inductor components, transformer/inductor coil/winding/connection, etc., can solve the problem of increasing component side cracks, large design space, manufacturing Complex procedures and other problems to achieve the effect of improving reliability and improving manufacturing yield
Pending Publication Date: 2021-06-25
INPAQ TECH
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Problems solved by technology
[0006] However, the above common power inductors with side electrodes and bottom electrodes, such as Figure 2A As shown, in order to maintain a certain strength of the blanks 21, 22 during the molding process, outwardly protruding reinforcing parts 21A, 22A are provided around the adjacent coil units 31, 32, 33, so that the blanks 21, 22 22 It occupies a considerable design space (about 25%) inside the magnetic powder coating, which greatly reduces the utilization rate of magnetic powder and the specification of inductance; and based on the consideration of space utilization, common coil wires and materials are connected by spot welding In this way, it is easy to increase the reliability risk because the spot welding joint is too small or the welding is incomplete. After the magnetic powder coating is formed and then bent, it will increase the chance of cracks on the side of the component and increase the variable of the defective rate.
Furthermore, power inductors with only bottom electrodes are common. Whether using a carrier with a stem or a platform carrier without a stem, the manufacturing process is relatively complicated, and the manufacturing cost is also high. The use of the carrier will also be Occupies a considerable design space inside the magnetic powder coating, greatly reducing the utilization rate of the magnetic powder and the specifications of the inductor
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[0095] The following is exemplary by way of reference to the accompanying drawings, and is intended to be construed as limiting the invention.
[0096] The bottom electrode of the present invention is integrated with power inductance, such as Figure 5A , 5B As shown, the power inductance 200 is composed of a coil 300, tin layer 400, and a magnetic powder cover 500, which can be an arbitrary shape in an appearance of the magnetic powder cladding 500. As shown, the coil 300 includes a coil body 301 that is a helical winding, and a first wire 302 and a second wire 303 extending from the end of the coil body 301; the first wire 302 and the second wire. The end of 303 is the outer coating 400 of the flat guide plates 302a, 303a, the flat guide plates 302a, 303a, and bent to the coil body 301, and when the overall magnetic powder cover 500 molded, The tin layer 400 that exposes the bottom of the magnetic powder cover 500 is used as the bottom electrode.
[0097] The bottom electrode of ...
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The invention discloses a carrier-free bottom electrode integrally-formed power inductor and a manufacturing method thereof. The power inductor is composed of a conducting wire, a tin layer, a magnetic powder coating body and the like, wherein a wire material of a coil is directly led out to the bottom of the magnetic powder coating body to serve as an electrode without a carrier, so that the risk of inductor open circuit caused by too small or incomplete welding points of the common coil and the material sheet is effectively reduced, and the characteristics, the reliability and the manufacturing yield of the inductor can be greatly improved.
Description
Technical field [0001] The present invention relates to a power inductance, in particular to a power inductance such as a wire, tin layer, a magnetic powder cover, and a wire, which is not required to pass the carrier, and directly leads to the bottom as an electrode. Electrode integrally forming power inductance and manufacturing method thereof. Background technique [0002] Common power inductors, mainly including coils and magnetic powder coverings, such as figure 1 As shown, its coil 10 includes a hunter coil body 11, and a first wire 12 and a second wire 13 extending from the coil body 11. The coil 10 mainly uses a circular or right wire that is circular or a right-angled wire to a spiral shape, in order to increase the contact area of the circuit assembly such as the circuit board, the first wire 12, the end of the second wire 13, and the wire frame 20 The sheets 21, 22 are welded together. [0003] It is often provided with the power inductance of the side electrode and ...
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IPC IPC(8): H01F27/28H01F41/076
CPCH01F27/2828H01F27/2866H01F41/076
Inventor 游承翰陈一诚
Owner INPAQ TECH