Interlaid Drive Roller Rows for Roll-to-Roll PCB Transfer
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Solution Overview
Problem
Existing methods for manufacturing printed circuit boards, such as dip rack and conveyor systems, suffer from low productivity and substrate instability, and roll-to-roll transfer apparatuses face issues with substrate damage due to overload and speed changes.
Innovation Solution
A roll-to-roll substrate transfer apparatus with multiple drive roller rows arranged perpendicular to the transferring direction, interlaid to distribute load uniformly and prevent substrate damage, integrated with a wet etching apparatus and other manufacturing tools for continuous substrate processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a roll-to-roll transfer apparatus is used to continuously transfer substrates, then productivity is improved, but the thin film substrate may be damaged by overload during transfer
Solution Approach 1:
The drive roller row is segmented into multiple individual drive rollers arranged along the roller axis. Each drive roller contacts the substrate at a different position, dividing the transfer function into multiple contact points. This segmentation distributes the load across multiple rollers, preventing overload at any single point while maintaining continuous transfer capability
Solution Approach 2:
The drive rollers are arranged with specific spacing and positioning along the roller axis to create non-uniform contact distribution. The interlaid arrangement of multiple roller rows ensures that different regions of the substrate receive appropriate support and drive force, with local contact quality optimized for both transfer efficiency and substrate protection
2Reliability
If multiple drive roller rows are arranged interlaid to distribute load uniformly, then substrate damage is prevented, but device complexity increases
Solution Approach 1:
Multiple drive roller rows serve multiple functions simultaneously: they provide drive force for substrate transfer, distribute load uniformly across the substrate, and support the substrate during processing. This multi-functionality justifies the increased complexity by delivering multiple benefits from a single structural configuration
Solution Approach 2:
The multiple drive roller rows are merged into a single integrated system where the rollers from different rows work together as a unified transfer mechanism. The interlaid arrangement allows the roller rows to function collectively, combining their individual capabilities to achieve uniform load distribution and reliable substrate transfer
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 enables efficient, damage-free transfer of thin film substrates, enhancing productivity and stability by distributing load uniformly across the substrate, thus preventing breakage during the manufacturing process.
Implementation Method 1
a first drive roller row contacting one surface of the substrate for transmitting motive power to the substrate... rotating in a same direction as the transferring direction of the substrate
Data Source
AI summary
In one aspect, a roll-to-roll substrate transfer apparatus is provided that includes: a feed roll and a take-up roll between which a printed circuit board substrate extends; and a plurality of drive roller rows transmitting motive power to the substrate for moving the substrate in a transferring direction, each drive roller row of the plurality includes a roller axis arranged in a direction perpendicular to the transferring direction of the substrate, and a plurality of spaced-apart drive rollers on the roller axis, wherein drive rollers of one drive roller row are arranged in spaces between drive rollers of adjacent drive roller rows. In other aspects, a wet etching apparatus and an apparatus for manufacturing a printed circuit board that include the roll-to-roll substrate transfer apparatus are provided.