LDS Polycarbonate Composite for Consistent Plating

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Solution Overview

Problem

Current methods for manufacturing molded injection devices (MIDs) using laser direct structuring (LDS) face limitations in plating performance variability and mechanical properties, particularly with conventional LDS materials that are sensitive to chemical plating solutions and conditions, leading to inconsistent results across a range of laser parameters.

Innovation Solution

A polymer composition comprising a polycarbonate polymer, a laser direct structuring additive capable of forming elemental metal nuclei, a reinforcing filler, and a laser direct structuring synergist that does not include substantially linear polycarbonate polymer, which enhances plating performance and mechanical properties, allowing for robust metallization and improved mechanical strength.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional LDS materials are used, then the laser direct structuring process can be implemented, but the plating performance varies significantly with different chemical plating solutions and conditions

Engineering Contradiction:

Improveplating performance consistencyVSAvoidplating performance variability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent modifies the chemical composition parameters of the LDS material by incorporating specific metal particles (silver, aluminum, copper, nickel, or their oxides/carbides/nitrides) with controlled size ranges (0.1-10 micrometers) and concentrations (0.1-5% by weight). These parameter changes make the material's plating performance less sensitive to variations in chemical plating solutions and conditions, achieving consistent results across different plating processes.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a composite LDS material by combining polymer matrix (polycarbonate, polyethylene terephthalate, polyimide, or their blends) with dispersed metal particles and optional metal salts. This composite structure provides both the structural properties of the polymer and the plating-nucleating properties of the metal particles, resulting in material that delivers reliable plating performance across varying chemical conditions.

Inventive Principle:

Principle #40Composite materials

2Productivity

If laser direct structuring is used to create conductive paths, then space and weight are saved, but the mechanical properties of the molded part may be compromised

Engineering Contradiction:

Improvespace savingsVSAvoidmechanical properties

Core Design Contradiction:

ProductivityVSStrength

Solution Approach 1:

The patent applies local quality by concentrating metal particles specifically at the laser-activated conductive path locations rather than uniformly throughout the entire part. The laser processing creates localized micro-roughness and metal particle aggregation only where conductive paths are needed, preserving the mechanical integrity of the bulk material while providing electrical conductivity only where required.

Inventive Principle:

Principle #3Local quality

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 proposed polymer composition achieves consistent and enhanced plating performance across a broad range of laser parameters with reduced variance, maintaining good mechanical properties such as impact resistance and tensile strength, thereby improving the reliability and efficiency of the LDS process.

Implementation Method 1

a laser direct structuring additive capable of being activated by an electromagnetic radiation and thereby forming elemental metal nuclei

Methodology Applied

Scientific EffectLaser activation: Laser

Implementation Method 2

The laser beam can then be used to activate the LDS additive forming a micro-rough track on the surface

Methodology Applied

Scientific EffectLaser ablation: Laser Ablation

Implementation Method 3

The metal particles from the LDS additive present on the surface of the micro-rough track can in turn form nuclei for the subsequent metallization

Methodology Applied

Scientific EffectNucleation: Nucleation

Data Source

PatentUS9944768B2High modulus laser direct structuring polycarbonate composites with enhanced plating performance and broad laser window and methods for the manufacture and use thereof

Publication Date: 2018.04.17 SHPP GLOBAL TECH BV

AI summary

The present disclosure relates to a polymer composition. The disclosed composition comprises a polycarbonate polymer, a laser direct structuring additive capable of being activated by electromagnetic radiation and thereby forming elemental metal nuclei, reinforcing filler, and a laser direct structuring synergist. Also disclosed is a method for making the disclosed polymer composition and an article of manufacture comprising the disclosed polymer composition.