Magnetic Fixing Apparatus for OLED Substrate Attachment
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Solution Overview
Problem
During the manufacturing of OLED products, the adhesive force of double-sided tape used to fix substrates to a bearing base decreases over time, leading to substrate separation, cracking, and frequent tape replacement, disrupting continuous production in evaporation processes.
Innovation Solution
A fixing apparatus utilizing a ferromagnetic material on the substrate and a magnetic field generator on the bearing base to create a magnetic field that securely attaches the substrate to the bearing base, preventing separation and cracking by maintaining consistent adhesive force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If double sided tape is used to fix the substrate to the bearing base, then the substrate can be initially fixed, but the adhesive force reduces over time causing separation and cracking
Solution Approach 1:
The patent replaces the chemical adhesive system (double sided tape) with a magnetic field-based mechanical attraction system. The magnetic field generator creates a magnetic force that attracts the ferromagnetic material on the substrate to the bearing base, providing reliable and durable attachment without the time-dependent adhesive force degradation inherent in chemical adhesives.
Solution Approach 2:
The patent changes the fundamental attachment mechanism from chemical adhesion to magnetic attraction. By introducing ferromagnetic material and a magnetic field generator, the attachment system transitions to a different physical principle (magnetism) that does not suffer from the same degradation issues as adhesive tapes, thereby extending the duration of effective attachment.
2Ease of manufacture
If double sided tape is used for substrate fixation, then initial fixing is achieved, but frequent replacement is needed disrupting continuous production
Solution Approach 1:
By replacing the consumable adhesive tape with a reusable magnetic field system, the patent eliminates the need for frequent replacement operations. The magnetic field generator and ferromagnetic material provide a permanent or long-lasting attachment solution that does not degrade over time, thereby maintaining continuous production without interruptions for tape replacement.
Solution Approach 2:
The magnetic field-based attachment system provides continuous and consistent attachment force throughout the production process. Unlike adhesive tape that loses effectiveness over time requiring replacement, the magnetic system maintains its holding capability, enabling uninterrupted continuous production and eliminating downtime associated with frequent tape changes.
3Force
If double sided tape is used to fix the substrate, then the substrate can be held in place, but separation occurs over time leading to falling and cracking
Solution Approach 1:
The patent substitutes the chemical bonding mechanism of adhesive tape with a magnetic attraction mechanism. The magnetic force between the magnetic field generator and ferromagnetic material provides strong and stable attachment that does not degrade over time, preventing substrate separation, falling, and cracking that occur with long-term adhesive use.
Solution Approach 2:
By using magnetic attraction instead of adhesive tape, the system provides preemptive protection against substrate failure. The magnetic field maintains consistent attachment force that prevents the separation and subsequent cracking that would occur with degrading adhesive, thereby cushioning against potential substrate damage throughout the product lifecycle.
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 magnetic field effectively fixes the substrate to the bearing base, preventing falling and cracking, and allows for continuous production without the need for frequent tape replacement, ensuring stable substrate attachment throughout the evaporation process.
Implementation Method 1
a magnetic field generator is disposed on a back surface of the bearing base at a location corresponding to the ferromagnetic material. The magnetic field generator is configured to generate a magnetic field so that the ferromagnetic material and the magnetic field generator are approaching to each other under an effect of the magnetic field
Implementation Method 2
a ferromagnetic material is formed on the front surface or a back surface of the base substrate
Data Source
AI summary
The present disclosure discloses a fixing apparatus for fixing a substrate to be processed below a bearing base during an evaporation process, the substrate to be processed includes a base substrate, a ferromagnetic material is formed on a front surface or a back surface of the base substrate, and a magnetic field generator is disposed on a back surface of the bearing base at a location corresponding to the ferromagnetic material; the magnetic field generator is configured to generate a magnetic field so that the ferromagnetic material and the magnetic field generator are approaching to each other under an effect of the magnetic field generated by the magnetic field generator to fix a front surface of the bearing base with the back surface of the base substrate. An evaporation method is further disclosed.