Ion Sensor Electrode Bonding Using Water and Laser Pressing

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Solution Overview

Problem

The bonding strength between the electrode body and the ion-sensitive film in ion sensors is weak, leading to potential performance failures due to material variations and easy peeling of the response surface.

Innovation Solution

A method involving application of water to the electrode body, pressurization of the ion-sensitive film, and irradiation with a laser beam from the opposite side to bond the film to the electrode body, ensuring uniform thermal energy transfer and improved adhesion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the ion-sensitive film is bonded to the electrode body using a volatile solvent, then the bonding process is simple, but the bonding strength is weak and the response surface is easily peeled off

Engineering Contradiction:

Improvebonding process simplicityVSAvoidbonding strength

Core Design Contradiction:

Ease of manufactureVSStrength

Solution Approach 1:

The invention changes the bonding parameters by using water instead of volatile solvents, and applying laser irradiation and pressurization to achieve strong bonding without peeling issues

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention replaces the chemical bonding mechanism (solvent-based) with a physical bonding mechanism (laser irradiation and pressurization) to achieve superior bonding strength

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If the bonding strength is increased to prevent peeling, then the response surface stability improves, but the manufacturing complexity increases

Engineering Contradiction:

Improveresponse surface stabilityVSAvoidmanufacturing process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention applies water to the electrode body surface before bonding, and uses pressurization during laser irradiation to ensure optimal bonding conditions from the start

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The laser irradiation serves multiple functions simultaneously: heating the bonding interface, evaporating water to create vapor pressure for adhesion, and sterilizing the surface

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enhances bonding strength between the electrode body and ion-sensitive film, reducing performance failures and ensuring stability and high yield rates despite material variations.

Implementation Method 1

irradiating the ion-sensitive film with a laser beam from the side opposite to the electrode body

Methodology Applied

Scientific EffectLaser heating: Laser

Implementation Method 2

ensuring uniform thermal energy transfer

Methodology Applied

Scientific EffectThermal energy transfer: Conduction (thermal)

Implementation Method 3

application of water to the electrode body

Methodology Applied

Scientific EffectEvaporation: Evaporation

Implementation Method 4

a vapor pressure is generated so as to enhance adhesion

Methodology Applied

Scientific EffectVapor pressure: Vapour Pressure

Implementation Method 5

pressurization of the ion-sensitive film

Methodology Applied

Scientific EffectMechanical pressurization: Pressure Increase

Data Source

PatentUS12429450B2Method for manufacturing ion sensor, and electrode body for ion sensor

Publication Date: 2025.09.30 HITACHI HIGH TECH CORP

AI summary

A method for manufacturing an ion sensor is provided in which an ion-sensitive film is adhered to an electrode body that accommodates an internal solution and has an internal electrode. The method includes an application step for applying water to a placement surface of the electrode body on which the ion-sensitive film is to be placed; a placement step for placing the ion-sensitive film in a state in which water is present on the placement surface; a pressurizing step for pressurizing the ion-sensitive film from the opposite side of the electrode body; and an irradiation step for irradiating a laser beam from the opposite side of the electrode body in a state in which the ion-sensitive film is pressed against the electrode body.