Base material for mounting electronic device and roll-shaped package of same

The substrate for electronic devices uses a metal foil and hygroscopic resin layer to block and absorb moisture, addressing the issues of moisture saturation and rust on electrodes, maintaining a dry environment and enhancing device longevity.

WO2026126889A1 Publication Date: 2026-06-18TOYO SEIKAN GRP HLDG LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
TOYO SEIKAN GRP HLDG LTD
Filing Date
2025-12-03
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Existing moisture-absorbing sheets and sealing materials for electronic devices fail to maintain a dry environment within the devices due to saturation of desiccants and moisture release, leading to rust on metal electrodes and reduced conductivity.

⚗Method used

A substrate for mounting electronic devices comprising a metal foil with a protective resin layer, a hygroscopic resin layer, and an electrode foil, where the hygroscopic resin layer chemically captures moisture and the metal foil blocks most moisture penetration, preventing rust on patterned electrode surfaces.

🎯Benefits of technology

The substrate effectively maintains a dry environment within electronic devices by absorbing trace moisture and preventing rust on electrode foils, ensuring long-term device performance and reliability.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention is a base material for mounting an electronic device, the base material comprising a metal foil and a protective resin layer and being characterized in that the protective resin layer is provided on the surface on one side of the metal foil, the surface on the other side of the metal foil is the electronic device mounting side surface, and a hygroscopic resin layer and an electrode foil are provided on the other-side surface of the metal foil in that order from the other-side surface of the metal foil. This base material for mounting an electronic device prevents permeation of water, thereby making it possible to hold the electronic device in a dry state and prevent the occurrence of rust on the electrode foil.
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