Electronic Device Panel Alignment Under Vacuum
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Solution Overview
Problem
The challenge in adhering multiple panels of electronic devices is the occurrence of panel offset due to pressure changes when switching from an atmospheric environment to a vacuum environment, leading to poor accuracy in alignment and assembly.
Innovation Solution
The solution involves using a first panel with a first alignment mark and a second panel with at least one second alignment mark, positioned under a vacuum environment of less than 700 Pa, where the adhesive member is spaced apart from both marks, allowing for precise alignment and adherence without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If panels are aligned in atmospheric environment and then adhered in vacuum environment, then the adhering process can be completed, but pressure changes cause offset between panels resulting in poor alignment accuracy
Solution Approach 1:
The patent combines the alignment and adhering operations into a single vacuum environment, eliminating the pressure transition that causes panel offset. The alignment marks are aligned and the adhesive is applied while both operations occur under the same vacuum conditions, ensuring consistent panel positions throughout the process.
Solution Approach 2:
The patent introduces a spacer as an intermediary element between the alignment mark and the adhesive. The spacer maintains a controlled distance, allowing the adhesive to be applied without directly contacting the alignment mark, thereby preventing interference with the alignment process while still enabling effective bonding.
2Volume of moving object
If adhesive member is placed close to alignment marks for compact design, then device size is reduced, but alignment accuracy deteriorates due to interference between adhesive and alignment marks
Solution Approach 1:
The spacer serves as a mediator that enables close placement of the adhesive near the alignment mark while maintaining sufficient separation. This intermediary element allows the system to achieve compact dimensions without sacrificing alignment precision, as the spacer ensures the adhesive does not interfere with the alignment mark function.
Solution Approach 2:
The patent applies local quality by creating a differentiated zone around the alignment mark. The spacer establishes a local region where the adhesive is positioned close to but not interfering with the alignment mark, allowing different functional requirements (compactness and alignment accuracy) to be satisfied in different local areas.
Data Source
AI summary
An electronic device includes: a first panel, a second panel, and a first adhesive member. The first panel includes a fist alignment mark. The second panel is disposed on the first panel, and includes a second alignment mark. The first adhesive member is disposed between the first panel and the second panel, and in a top view of the electronic device, a first distance is between the first adhesive member and the first alignment mark, a second distance is between the first adhesive member and the second alignment mark, the first distance is greater than zero, and the second distance is greater than zero.