Atomic Beam Apparatus Neutralization for LCD Alignment
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Solution Overview
Problem
Conventional non-contact type ion beam alignment treatments for liquid-crystal display alignment layers suffer from high energy ion beams that damage the layers and result in poor uniformity and low yield due to inefficient neutralization, leading to uneven alignment.
Innovation Solution
An apparatus comprising an ionization chamber, an ion beam drawing device, a neutralization chamber, and a voltage regulating device is used to convert high-energy ion beams into neutral atomic beams of moderate energy, utilizing a deceleration electrode to lower ion beam energy and an electric arc chamber to generate an electron cloud for neutralization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high energy ion beam is used for alignment treatment, then alignment treatment can be performed, but the alignment layer is easily damaged and uniformity is poor
Solution Approach 1:
The patent introduces an inert gas (e.g., helium, neon, argon) as an intermediary substance between the high energy ion beam and the alignment layer. The ion beam first collides with the inert gas to generate low energy secondary atoms, which then bombard the alignment layer. This intermediary approach allows the use of high energy ion beams for efficient alignment treatment while protecting the alignment layer from direct high energy damage, thereby improving uniformity.
Solution Approach 2:
The patent changes the energy parameter of the beam particles through collision with inert gas. High energy ion beams (e.g., 1000 eV) collide with inert gas atoms, converting them into low energy secondary atoms (e.g., 50-200 eV). This parameter change enables the beam to maintain high flux for efficient treatment while reducing individual particle energy to prevent damage and improve uniformity.
2Productivity
If high energy ion beam is used for alignment treatment, then alignment treatment can be performed, but the alignment layer quality is deteriorated
Solution Approach 1:
The inert gas acts as a mediator that converts high energy ion beams into low energy secondary atoms. These secondary atoms then perform the alignment treatment on the alignment layer. This approach maintains high treatment speed through high flux while ensuring alignment layer quality by using low energy particles that cause minimal damage.
Solution Approach 2:
The patent converts the potentially harmful high energy ion beam into beneficial low energy secondary atoms through collision with inert gas. The high energy ions that would normally damage the alignment layer are transformed into low energy atoms that provide effective alignment treatment, turning a harmful effect into a beneficial one.
3Manufacturing precision
If ion beam energy is reduced to alleviate damage issues, then alignment layer damage is reduced, but beam current becomes smaller and processing time increases
Solution Approach 1:
The inert gas serves as an intermediary that enables the system to operate at high beam current while delivering low energy particles to the alignment layer. The ion beam maintains high flux through the inert gas collision process, ensuring fast processing speed, while the resulting secondary atoms provide the necessary low energy for uniform and damage-free alignment treatment.
4Productivity
If traditional charge transfer method is used for neutralization, then ion beam can be converted to atomic beam, but effective neutralization cannot be achieved
Solution Approach 1:
The patent uses inert gas atoms as intermediaries to achieve effective neutralization. Instead of relying on charge transfer processes that are inefficient, the ion beam collides with inert gas atoms to directly generate neutral secondary atoms. This intermediary approach provides effective neutralization while maintaining high beam current and treatment efficiency.
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 apparatus produces a neutral atomic beam that effectively aligns the alignment layer without damage, improving alignment quality and efficiency by maintaining high beam current and reducing processing time.
Implementation Method 1
a voltage regulating device, disposed on the path of the ion beam, and disposed between the ion beam drawing device and the neutralization chamber
Implementation Method 2
the neutralization chamber comprises one electric arc chamber and one chamber. An electron cloud is produced in the electric arc chamber
Data Source
AI summary
An apparatus for producing an atomic beam comprising an ionization chamber, an ion beam drawing device, a neutralization chamber and a voltage regulating device is provided. The ionization chamber generates an ion beam and the ion beam drawing device draws the ion beam out from the ionization chamber. The neutralization chamber and the voltage regulating device are disposed on the path of the ion beam. Moreover, the ion beam drawing device is disposed between the ionization chamber and the neutralization chamber and the voltage regulating device is disposed between the ion beam drawing device and the neutralization chamber. The energy of the ion beam can be reduced by the voltage regulating device. The ion beam is neutralized to a neutral atomic beam after passing through the neutralization chamber. Therefore, the apparatus for producing the atomic beam provided in this invention can effectively produce the neutral atomic beam.