Porous Passivation Layer for E-Skin Adhesion and Waste Management

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing electronic skins (e-skins) struggle with long-term health monitoring due to degradation from skin waste product accumulation and the inability to perfectly adhere to the skin, leading to inaccurate readings over time.

Innovation Solution

A non-invasive electronic device with an electronic module featuring a passivation layer, an electronic circuit unit with interconnects and sensing units, and a second passivation layer, all with through-holes forming a hole pattern for improved adhesion and skin waste prevention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of stationary object

If existing e-skins are used for long-term monitoring, then continuous health monitoring is achieved, but skin waste products accumulate at the interface causing degradation and inaccurate readings

Engineering Contradiction:

Improvemonitoring durationVSAvoidskin waste accumulation

Core Design Contradiction:

Duration of action of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The passivation layer is designed with a porous structure containing multiple through-holes that extend from the skin-facing surface to the opposite surface. This porous configuration allows skin waste products to pass through the layer rather than accumulate at the interface, preventing degradation and maintaining accurate sensor readings over extended monitoring periods

Inventive Principle:

Principle #31Porous materials

2Reliability

If a thick and rigid substrate is used for e-skin, then high-performance single crystal semiconductor devices can be embedded, but the device cannot perfectly adhere to the skin surface

Engineering Contradiction:

Improvesemiconductor device performanceVSAvoidadhesion strength

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The passivation layer is designed as a thin, flexible film structure rather than a thick rigid substrate. This thin-film configuration enables the e-skin to conform perfectly to the skin surface and maintain strong adhesion, while still providing adequate protection and support for embedded high-performance single crystal semiconductor devices

Inventive Principle:

Principle #30Flexible shells and thin films

3Strength

If the interface between e-skin and skin is made compliant, then adhesion is improved, but the interface becomes vulnerable to damage from waste product accumulation

Engineering Contradiction:

Improveinterface adhesionVSAvoidinterface durability

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The passivation layer incorporates a porous structure with through-holes that prevent waste product accumulation at the interface. This porous design maintains compliant adhesion to the skin surface while preventing the degradation that would compromise interface durability, thereby simultaneously improving both adhesion strength and long-term reliability

Inventive Principle:

Principle #31Porous materials

Data Source

PatentUS12329539B2Non-invasive skin sensor for long-term monitoring and method for fabricating the same

Publication Date: 2025.06.17 AMOREPACIFIC CORP

AI summary

Embodiments relate to a non-invasive electronic device including at least one sensing unit capable of accurately monitoring a user's health condition for a long time such as a few weeks without malfunction while it is worn on the wearer's skin in a non-invasive manner and a method for fabricating the non-invasive electronic device. The non-invasive electronic device includes for example, a skin sensor device.