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Magnetic composite material, preparation method, and application of magnetic composite material used as magnetic core in PCB embedded inductor

A magnetic composite material, magnetic core technology, applied in the direction of organic material/organic magnetic material magnetism, printed inductors, containing printed inductors, etc. Amine resin has problems such as high hygroscopicity and low inductance value of magnetic core, which can achieve the effect of long curing time, high embedded inductance value and stable embedded inductance value.

Active Publication Date: 2016-12-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

BangD H et al. in the literature "Ni-Zn ferrite screen printed power inductors for compact DC-DC power converter applications" ("Ni-Zn ferrite screen printed power inductors and its application in DC-DC power converters") and Sugawa Y et al. in the literature "Carbonyl-iron / epoxy composite magneticcore for planar power inductor used in package-level power grid" ("Carbonyl iron / epoxy composite magnetic core for planar power inductor used in package-level power grid" ) respectively use Ni-Zn ferrite and polyimide, carbonyl iron and epoxy resin to make magnetic composite materials, and then use screen printing to cover a layer of magnetic composite materials on the upper and lower layers of the inductance coil and then make embedded embedding. Magnetic core inductance; the polyimide resin used in the above method has high hygroscopicity, and the epoxy resin has poor aging resistance and moisture resistance, and the above method prints the magnetic material on the surface of the inductance coil, which can only enhance the inductance in the plane direction. The inductance of the magnetic core is low and the inductance error is large

Method used

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  • Magnetic composite material, preparation method, and application of magnetic composite material used as magnetic core in PCB embedded inductor
  • Magnetic composite material, preparation method, and application of magnetic composite material used as magnetic core in PCB embedded inductor
  • Magnetic composite material, preparation method, and application of magnetic composite material used as magnetic core in PCB embedded inductor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A method for preparing a magnetic composite material, comprising the steps of:

[0060] Step A: ferrite surface modification treatment;

[0061] A1: Add 5g of ferrite into 45mL of acetone, and ultrasonically disperse for 1 hour to obtain a mixed system;

[0062] A2: Add 0.05g of titanate coupling agent TMC-105 into 5mL of acetone, mix well to make a solution system;

[0063] A3: Add the mixed system obtained in step A1 to the solution system obtained in step A2, and react at 50°C for 2 hours to form a solid-liquid mixed system; filter and wash the solid-liquid mixed system, and place it at 80°C Under drying for 12 hours, grinding to obtain surface-modified ferrite;

[0064] Step B: preparing a magnetic composite material;

[0065] B1: Dissolve 2.5g of polyphenylene ether resin in 3mL of N,N-dimethylformamide (N,N-Dimethylformamide, DMF) to obtain a uniform mixing system;

[0066] B2: Take 2.5 g of the surface-modified iron oxide body prepared in step A, disperse it ...

Embodiment 2

[0069] The application of magnetic composite materials as magnetic cores in PCB embedded inductors:

[0070] The top layer conductive coil 101 and the bottom layer conductive coil 102 are respectively etched on the top and bottom surfaces of the double-sided copper clad laminate. The top layer conductive coil 101 and the bottom layer conductive coil 102 are planar multi-turn coils with the same shape, as a preferred method In the present invention, the top layer conductive coil 101 and the bottom layer conductive coil 102 adopt a complementary design, specifically: the inner ends of the two conductive coils overlap and one The single-turn coil in the conductive coil and the single-turn coil in the other conductive coil are arranged alternately from the inside to the outside, thereby forming a tighter spatial winding structure, which is conducive to generating a uniformly distributed magnetic field in space and improving the inductance. value; as figure 1 As shown, the conduct...

Embodiment 3

[0074] A method for preparing a magnetic composite material, comprising the steps of:

[0075] Step A: ferrite surface modification treatment;

[0076] A1: Add 5g of ferrite into 45mL of acetone, and ultrasonically disperse for 1 hour to obtain a mixed system;

[0077] A2: Add 0.05g of titanate coupling agent TMC-105 into 5mL of acetone, mix well to make a solution system;

[0078] A3: Add the mixed system obtained in step A1 to the solution system obtained in step A2, and react at 50°C for 2 hours to form a solid-liquid mixed system; filter and wash the solid-liquid mixed system, and place it at 80°C Under drying for 12 hours, grinding to obtain surface-modified ferrite;

[0079] Step B: preparing a magnetic composite material;

[0080] B1: Dissolve 4.5g of polyphenylene ether resin in 5mL of N,N-dimethylformamide (N,N-Dimethylformamide, DMF) to obtain a uniform mixing system;

[0081] B2: Take 0.5 g of the surface-modified iron oxide body prepared in step A, disperse it ...

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Abstract

The invention discloses a magnetic composite material, a preparation method, and an application of the magnetic composite material used as a magnetic core in a PCB embedded inductor, and belongs to the manufacturing field of a printed circuit. The magnetic composite material comprises 5-90mass% of ferrite and 10-95mass% of polyphenyl ether resin; the preparation method for the magnetic composite material comprises the steps of performing surface modification treatment on the ferrite, then enabling the ferrite to be mixed with a polyphenyl ether resin solution, heating and enabling a solvent to be volatilized to obtain a slurry-shaped magnetic composite material; and preparing a magnet core from the slurry-shaped magnetic composite material through a printing packing method, or curing the slurry-shaped magnetic composite material, and then preparing the magnetic core through a pressing packing method, so that the application of the magnetic composite material used as the magnetic core in the PCB embedded inductor technology is realized. By adoption of the magnetic composite material and the preparation method and application thereof, the instable inductance value and lowered reliability caused by inconsistency of thermal expansion coefficients of a conventional magnetic core material and a printed circuit substrate material can be overcome; and the preparation method is simple, and advantages on energy saving and manufacturing efficiency are represented.

Description

technical field [0001] The invention belongs to the field of printed circuit manufacturing, in particular to a magnetic composite material, a preparation method and its application as a magnetic core in PCB embedded inductance. Background technique [0002] With the development of wireless communication, automotive electronics and other consumer electronics products in terms of multi-function, miniaturization, portability, high speed, low power consumption and high reliability, integrated circuits are gradually integrating chips, micro sensors, micro actuators and Various passive components such as resistors, capacitors, inductors, filters, couplers, etc. are integrated into one package, which is called system-in-package technology. In electronic products, inductors are one of the important components for high frequency and microwave frequency signal transmission and processing. Traditional inductance devices are generally divided into two types: point-of-load modules and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/42H01F41/02H01F17/00C08L71/12C08K9/04C08K3/22H05K1/16
CPCC08K3/22C08K9/04H01F1/42H01F17/0006H01F41/0246H05K1/165C08L71/12
Inventor 何雪梅陈苑明何为王守绪周国云王翀张怀武
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA