Circuit device and display device comprising same

The circuit device employs an epoxy coating layer to prevent moisture penetration and short circuits, using a flux-free solder paste, addressing the issue of moisture-induced failures in high humidity environments.

WO2026014567A1PCT designated stage Publication Date: 2026-01-15LG ELECTRONICS INC
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Patent Information

Application Number
PCT/KR2024/009877
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-07-10
Publication Date
2026-01-15

AI Technical Summary

Technical Problem

In high temperature and high humidity environments, moisture penetration leads to frequent short circuits between electrodes in circuit devices, and existing solder pastes containing flux require post-process removal.

Method used

A circuit device is developed with a coating layer composed of an epoxy component that surrounds electronic components, preventing moisture penetration and acting as a waterproofing film, using a solder paste that does not contain flux.

Benefits of technology

The epoxy coating layer effectively prevents moisture ingress, thereby preventing short circuits and eliminating the need for flux removal, ensuring reliable operation in harsh conditions.

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    Figure KR2024009877_15012026_PF_FP_ABST
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Abstract

The present specification relates to a circuit device and a display device comprising same. The circuit device includes: a substrate; electronic components mounted on the substrate; an IC chip in contact with the upper surfaces of the electronic components; and a coating layer partially surrounding the side surfaces of the electronic components and having an upper surface formed to be spaced apart from the IC chip.
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Citation Information

Patent Citations

  • Apparatus and method for fluxless solder joining of wafer level using laser

    KR100292295B1

  • Flip-chip assembly with thin underfill and thick soldermask

    KR1020050118694A

  • Method for bonding between electrical devices usingultrasonication

    KR1020070025889A

  • Method and apparatus for connecting packages onto printed circuit boards

    KR1020140110707A

  • System for providing bowling balls trajectory indication service

    KR1020240026415A