Liquid Crystal Polymer Composition for Stronger Epoxy Adhesion
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Solution Overview
Problem
Liquid crystal polymer compositions used in camera modules face issues with insufficient adhesion to adhesive agents like epoxy resin, leading to component detachment and performance failures due to increased stress and weight, particularly in high-pixel and high-magnification camera modules.
Innovation Solution
A liquid crystal polymer composition containing a liquid crystal polymer, a semi-aromatic polyamide resin, and barium sulfate, optionally with a reinforcing material, to enhance adhesion to adhesive agents and improve bonding between components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If liquid crystal polymer is used for its excellent mechanical strength and moldability, then manufacturing precision and ease of manufacture are improved, but adhesion to adhesive agents deteriorates
Solution Approach 1:
The patent applies composite materials by combining liquid crystal polymer with specific inorganic particles (having Mohs hardness of 2.5 or more) to create a composite composition. This composite structure maintains the excellent moldability and dimensional accuracy of LCP while the inorganic particles on the surface provide improved adhesion to adhesive agents, resolving the contradiction between manufacturing precision and adhesion reliability.
Solution Approach 2:
The patent changes the surface properties of the LCP by incorporating inorganic particles with specific hardness characteristics (Mohs hardness ≥ 2.5). This parameter change in surface composition and hardness modifies the adhesion characteristics without compromising the bulk material's moldability and dimensional stability, thus resolving the adhesion problem while maintaining manufacturing precision.
2Manufacturing precision
If ultrasonic cleaning is applied to remove foreign matter, then purity is improved, but surface delamination and napping occur
Solution Approach 1:
The composite structure with inorganic particles reinforces the surface of the LCP molded article. This reinforcement prevents surface delamination and napping that would otherwise occur during ultrasonic cleaning, allowing effective removal of foreign matter while maintaining surface integrity.
Solution Approach 2:
The inorganic particles are incorporated into the LCP composition beforehand to provide preemptive reinforcement of the surface structure. This prior cushioning strengthens the surface against the mechanical stresses of ultrasonic cleaning, preventing delamination and napping before they can occur during the cleaning process.
3Manufacturing precision
If camera module components are cleaned under strict ultrasonic conditions, then foreign matter removal is improved, but productivity decreases
Solution Approach 1:
The LCP composite with inorganic particles enables effective cleaning under less stringent conditions compared to conventional LCP. The reinforced surface allows for effective foreign matter removal with reduced ultrasonic intensity or shorter cleaning times, thereby improving productivity while maintaining cleaning effectiveness.
4Ease of manufacture
If adhesive agent bonding is used to bond components, then ease of assembly is improved, but adhesion force becomes insufficient due to increased stress and weight
Solution Approach 1:
The LCP composite with inorganic particles provides improved adhesion to adhesive agents, enabling sufficient bonding strength even under increased stress and weight conditions in high-pixel camera modules. This maintains the ease of adhesive bonding while resolving the insufficient adhesion force problem.
Data Source
AI summary
Provided is a liquid crystal polymer composition capable of providing a molded article excellent in adhesion to an adhesive agent, such as epoxy resin, and improving the adhesion between components made of the molded article or the adhesion between a component made of the molded article and other components. A liquid crystal polymer composition contains a liquid crystal polymer (A), a semi-aromatic polyamide resin (B), and barium sulfate (C).