Mid-Frame Plasma Pretreatment for Durable Electronic Coatings
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Solution Overview
Problem
The challenge of applying paints and coatings to electronic device mid-frames to achieve superior adhesion and durability, while avoiding damage to functional components and maintaining precise thickness, is complicated and often results in blemishes due to poor paint adherence.
Innovation Solution
A method and apparatus using a robotic system with a plasma device and computer-controlled robot arm to apply cold atmospheric plasma treatment, followed by precise painting, ensuring adhesion and durability of coatings on electronic device mid-frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual painting methods are used to apply coatings to mid-frames, then the process is simple and flexible, but paint adhesion is poor and blemishes appear quickly
Solution Approach 1:
The patent applies plasma treatment to the mid-frame surface before painting to modify the surface properties and enhance paint adhesion. This preliminary surface preparation step creates a more receptive substrate for the coating, preventing premature chipping and blemishes while maintaining a manageable painting process
2Strength
If thick coating is applied to ensure durability, then the coating is more durable, but the coating may interfere with button functionality and exceed the desired thickness of less than 1 mm
Solution Approach 1:
The patent uses plasma treatment to modify the surface energy and roughness of the mid-frame, which enhances paint adhesion and allows for thinner coating applications. This parameter change in surface properties enables achieving durable coatings at controlled thicknesses below 1 mm without compromising button functionality
3Reliability
If painting is performed to restore device appearance, then the device value is maintained, but paint may enter charging ports or speaker openings causing damage
Solution Approach 1:
The patent applies plasma treatment locally to the mid-frame surface areas that require painting, creating a zone of enhanced adhesion precisely where the coating is needed. This localized treatment allows for controlled paint application that maintains appearance quality while preventing paint migration into sensitive openings through precise process control
4Manufacturing precision
If automated robotic painting is implemented to improve precision, then coating thickness control improves, but the device complexity and cost increase significantly
Solution Approach 1:
The patent applies plasma treatment as a preliminary step that simplifies the subsequent painting process by enhancing surface adhesion properties. This pre-treatment allows for more forgiving painting conditions and reduces the need for highly complex automated systems, achieving good thickness control with moderately complex equipment
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 system provides superior paint adhesion and durability on electronic device mid-frames, preventing damage and ensuring functional integrity by using a robotic plasma application process.
Implementation Method 1
A plasma device secured to the robot arm at the end opposite the connection to the frame
Data Source
AI summary
A method and apparatus for applying plasma to the mid-frame of an electronic device is shown and described. The apparatus for applying plasma to the mid-frame of an electronic device includes a frame which creates an interior volume. The frame has a bottom portion and a top portion terminating at the top of the apparatus. A robot arm is secured to the frame. A plasma device secured to the robot arm at the end opposite the connection to the frame. A computer is operably coupled with the robot arm and the plasma device.