Copper Plating Additive Composition for Uniform, Bright Brush-Plated Films
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Solution Overview
Problem
Current copper brush plating methods for plastic films suffer from uneven thickness, poor brightness, and high sheet resistance, leading to low yield and efficiency, with issues such as film perforation and poor adhesion, especially in double-sided copper plating processes.
Innovation Solution
A copper plating additive composition comprising 1,4-cyclohexanedione monoethylene acetal, potassium phthalimide, and an amino polyol compound, combined with a copper plating solution containing copper sulfate, sulfuric acid, and chloride ions, is used to enhance the plating process, improving uniformity, brightness, and adhesion through a copper brush plating method with controlled parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If cyanide-free copper brush plating is used, then plating speed is improved, but plating layer uniformity and brightness deteriorate
Solution Approach 1:
The patent modifies the chemical composition parameters of the plating solution by introducing specific additives (1,4-cyclohexanedione monoethylene acetal, potassium phthalimide, amino polyol compound) to control the plating process, enabling high-speed plating with improved uniformity and brightness
Solution Approach 2:
The patent creates a composite plating solution system combining copper sulfate, sulfuric acid, chloride ions, and the aforementioned additives to achieve synergistic effects that simultaneously improve plating speed, uniformity, and brightness
2Reliability
If acid copper electroplating is used to thicken copper film, then sheet resistance is improved, but film perforation and cathode roller copper plating increase
Solution Approach 1:
The patent optimizes the electroplating parameters including current density, plating time, and solution composition to achieve the desired sheet resistance while preventing excessive copper deposition on the cathode roller that would cause film perforation
Solution Approach 2:
The patent employs controlled electroplating processes with monitored parameters to provide feedback control, adjusting current density and plating conditions in real-time to prevent film perforation while achieving target sheet resistance
3Speed
If high current density is used in brush plating, then plating speed is improved, but plating layer brightness and uniformity deteriorate
Solution Approach 1:
The patent introduces specific chemical additives that modify the electrochemical reactions at the cathode surface, enabling high current density operation while maintaining bright and uniform plating layers through controlled deposition mechanisms
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 solution achieves a continuous, uniform, and bright copper film with reduced sheet resistance, minimizing film perforation and enhancing adhesion, suitable for large-scale industrial production.
Implementation Method 1
a copper plating solution, comprising: a copper plating additive composition, potassium phthalimide, an amino polyol compound, water, copper sulfate, sulfuric acid and chloride ions
Data Source
AI summary
Provided are a copper plating additive composition, a copper plating solution, and a copper brush plating method using the same. The copper plating additive composition includes 1,4-cyclohexanedione monoethylene acetal, potassium phthalimide, and an amino polyol compound.