Laser Machining Window Transfer for Vacuum Chamber Cleanliness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The inefficiency in laser machining processes for organic light emitting displays due to contamination of protection windows in vacuum chambers, which requires frequent chamber opening for cleaning or replacement, leading to reduced production efficiency and potential moisture or oxygen penetration that damages the substrates.
Innovation Solution
A laser apparatus with a dual vacuum chamber system and a transfer unit that allows for contamination detection and automatic replacement of protection windows without opening the vacuum chamber, maintaining a high vacuum environment and minimizing substrate exposure to moisture and oxygen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the protection window is manually cleaned or replaced by opening the vacuum chamber, then the contamination problem is solved, but the production efficiency is reduced due to chamber opening and vacuum re-establishment time
Solution Approach 1:
The protection window is designed as a separate, replaceable component independent from the vacuum chamber structure. This segmentation allows the window to be replaced without opening the chamber, as the transfer unit can move the window through the chamber wall opening without breaking vacuum seal
Solution Approach 2:
A transfer unit acts as an intermediary mechanism between the vacuum chamber interior and exterior. This transfer unit includes a transfer opening that can move between closed and open states, enabling protection window replacement while maintaining vacuum isolation
2Reliability
If the vacuum chamber is opened for protection window replacement, then the contaminated window is replaced, but moisture and oxygen may penetrate and damage the substrate
Solution Approach 1:
The transfer unit is pre-configured with a transfer opening that can be opened only when the carrier is positioned away from the substrate. This beforehand preparation ensures that substrate exposure to moisture and oxygen is prevented by timing the window replacement operation when the substrate is not in the laser processing position
3Productivity
If laser machining is performed continuously, then production efficiency is improved, but the protection window becomes contaminated and machining quality degrades
Solution Approach 1:
The transfer unit enables continuous operation by allowing protection window replacement without interrupting the vacuum state or requiring chamber opening. The automated transfer mechanism ensures that window replacement can be performed during carrier repositioning, maintaining continuous production flow
Solution Approach 2:
A contamination detector monitors the protection window condition in real-time and provides feedback to the control unit. When contamination exceeds a threshold, the control unit automatically triggers the transfer unit to replace the window, ensuring machining quality is maintained without manual intervention
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
Enables continuous high-vacuum laser machining with increased production efficiency by automatically replacing contaminated protection windows, preventing degradation of machining quality and ensuring reliable substrate processing.
Implementation Method 1
a laser beam emitted by a laser LM passes through a chamber window CW and a first protection window PW1
Implementation Method 2
a high vacuum environment of a chamber is used when laser machining is performed on a substrate (SUB) of an organic light emitting display
Data Source
AI summary
A laser apparatus includes: a first vacuum chamber, wherein machining is performed on a target substrate in the first vacuum chamber; a laser facing the first vacuum chamber; a carrier disposed in the first vacuum chamber, wherein the target substrate is seated on the carrier; a chamber window disposed in one surface of the first vacuum chamber, wherein a laser beam emitted by the laser passes through the chamber window; a first protection window positioned between the carrier and the chamber window; a second vacuum chamber disposed at a first side of the first vacuum chamber; and a transfer unit configured to transfer the first protection window to the second vacuum chamber.