Ball Transfer Unit Alignment Device for Glass Substrates

The patent replaces the expensive porous carbon fiber float pad with a disposable plastic film that has a short service life. The plastic film is much cheaper to manufacture and can be easily replaced, achieving the same alignment function without the high cost of carbon fiber materials.

The patent substitutes the mechanical porous carbon fiber structure with a simpler plastic film system that uses air pressure differential to achieve alignment. This mechanical substitution eliminates the need for expensive porous materials while maintaining the alignment function through pneumatic principles.

The patent uses air pressure to create an anti-weight effect that counteracts the gravitational force on the heavy glass substrate. By controlling air pressure between the substrate and support surface, the system reduces the effective normal force and thus the frictional force, enabling alignment of heavy substrates without reducing their weight.

The patent employs pneumatic pressure control to manage the interaction between the glass substrate and the support surface. By introducing controlled air pressure, the system creates a pneumatic bearing effect that reduces friction and enables smooth movement and alignment of heavy substrates during the manufacturing process.

The patent uses a disposable plastic film that can be easily discarded and replaced rather than attempting to clean and reuse the alignment surface. This eliminates complex cleaning procedures and ensures that each alignment operation starts with a clean surface, maintaining alignment accuracy without increasing cleaning complexity.

The patent performs preliminary cleaning by using a fresh plastic film for each alignment operation. Instead of cleaning the underlying surface after contamination, the system prevents contamination accumulation by using a new clean film for each task, ensuring alignment accuracy is maintained without complex post-operation cleaning procedures.