Inductor based on low-voltage plastic package molding and preparation method thereof

The preparation of inductors through low-voltage plastic sealing molding process solves the problems of large internal stress and poor soft magnetic performance during the preparation process of existing inductors, and achieves inductor preparation with high density, low internal stress and high electromagnetic performance.

CN119724884APending Publication Date: 2025-03-28DONGGUAN MENTECH OPTICAL & MAGNETIC CO LTD
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Patent Information

Application Number
CN202411647239.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-18
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

During the preparation process, existing inductors have problems such as large internal stress, poor soft magnetic performance, poor shielding effect, low product reliability and high loss, which is difficult to meet the needs of miniaturization, high frequency, high power and modularization.

Method used

The inductor is prepared by low-voltage plastic sealing molding process, and the iron-based alloy magnetic powder is prepared by aerosolization method, and the double-layer coating is carried out. After the magnetic core is sintered and prepared and wound, the coated powder particles are placed into the magnetic core by using the low-voltage plastic sealing molding method to achieve integrated molding.

Benefits of technology

It realizes high density and low internal stress of the inductor, improves effective magnetic permeability, strength and reduces high-frequency losses, and improves the reliability and comprehensive electromagnetic performance of the inductor.

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Abstract

The invention discloses an inductor based on low-voltage plastic package forming and a preparation method thereof, and relates to the technical field of metal soft magnetic composite material preparation. The method comprises the following steps: preparing iron-based alloy magnetic powder by adopting a gas atomization method; the prepared iron-based alloy magnetic powder is subjected to double-layer coating, and iron-based alloy coated powder particles are obtained; sintering to prepare a magnetic core, and winding the magnetic core; and putting the iron-based alloy coated powder particles into the wound magnetic core, and carrying out low-pressure plastic package molding to obtain the prepared inductor. According to the manufacturing method, the integrally-formed inductor is obtained through the low-voltage plastic packaging forming technology, the manufactured inductor has good comprehensive electromagnetic performance and high reliability, and the requirement for the miniaturization and modularization development direction of inductance devices can be met.
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