· Limitations in terms of size

· Poor durability and difficulty in handling

· Difficulties in controls of width-wise expansion due to two-sided welding

· Having to scrap the entire stick in case of defects

· Large area implementation possible

· Excellent durability and ease of handling

· Control of deformation by thermal expansion owing to four-sided welding

· Allows repairing by unit

· Fabrication based on unit mask allowing high compatibility (Etching, Laser, EFM)

→ Allows strategic cooperation