Organopolysiloxane Laminate Interfaces Bonded to Prevent Peeling
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Solution Overview
Problem
Existing organopolysiloxane cured films used in electronic components face issues of interface peeling and reduced reliability due to insufficient adhesive strength and trackability, particularly in applications like actuators and transducers.
Innovation Solution
A laminate body composed of two or more organopolysiloxane cured films with different compositions, chemically bonded at their interfaces through a hydrosilylation reaction, where at least one film contains electrically conductive microparticles and the other includes a dielectric functional group, ensuring strong adhesion and alternating layers for improved reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrode layer with conductive filler is formed on an organopolysiloxane cured film, then electrical conductivity is improved, but interface peeling occurs due to insufficient adhesive strength
Solution Approach 1:
The patent changes the chemical composition parameters of the organopolysiloxane cured film by introducing functional groups (epoxy, carboxyl, hydroxyl, isocyanate, or thiocyanate groups) to modify the surface chemistry and improve adhesion to the electrode layer containing conductive filler
Solution Approach 2:
The patent creates a composite structure by combining organopolysiloxane cured film with specific functional groups and an electrode layer with conductive filler, forming a laminated body where the functional groups chemically bond to the conductive filler, achieving both electrical conductivity and strong adhesion
2Reliability
If an electrode layer is formed on an organopolysiloxane cured film, then electrical activity is improved, but trackability of the electrode surface deteriorates
Solution Approach 1:
The patent modifies the surface properties of the organopolysiloxane cured film by incorporating functional groups that enhance both electrical activity and surface trackability, allowing the electrode layer to maintain good contact during displacement operations
3Adaptability or versatility
If different compositions are used for dielectric layer and electrode layer, then functional requirements are met, but adhesive strength at interface decreases
Solution Approach 1:
The patent applies local quality by introducing specific functional groups at the interface region of the organopolysiloxane cured film, where these functional groups locally enhance adhesion to the electrode layer while the bulk material maintains its dielectric or structural properties
Solution Approach 2:
The functional groups (epoxy, carboxyl, hydroxyl, isocyanate, or thiocyanate) act as intermediaries between the organopolysiloxane cured film and the conductive filler in the electrode layer, forming chemical bonds that bridge the two different compositions and ensure strong interfacial adhesion
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
The laminate body provides a reliable structure with enhanced resistance to electrification defects and interface peeling, suitable for applications such as actuators and transducers, by ensuring strong chemical bonding between layers.
Implementation Method 1
at least a portion of functional groups involved in the curing reaction are the same, wherein the laminated organopolysiloxane films have structures chemically bonded at an interface thereof
Data Source
AI summary
A laminate body is provided, in which two or more organopolysiloxane cured films are obtained by curing curable organopolysiloxane compositions having different compositions because, e.g., the functions required for a dielectric layer and electrode layer are different. In general, problems such as peeling and defects due to insufficient adhesive strength and trackability do not easily occur at an interface between the cured films forming the laminate body. Applications and methods are also provided. The laminate body comprises a structure with two or more laminated organopolysiloxane cured films with different compositions. At least a portion of functional groups involved in the curing reaction are the same. The laminated cured films have structures chemically bonded at an interface thereof. Typically, the compositions both contain a hydrosilylation reactive group, and a SiH/Vi ratio in the compositions differ, with the laminated cured films having structures chemically bonded by hydrosilylation reactions at an interface thereof.