Technical Introduction of 2.5D Cover Glass Processing

 

1.      Background of 2.5D Cover Glass
With the increasing demand for refined appearance and smooth touch interaction, 2.5D cover glass has gradually replaced traditional flat glass. Its chamfered and polished edges not only enhance the premium look but also provide a smoother sliding experience for users.

 

2.      Key Processes in 2.5D Glass Fabrication
The core of 2.5D glass processing lies in edge profile control and surface precision.
The main steps include:
a. CNC Edge Grinding: Using high-precision CNC machines to achieve specified corner radii (R-edge profiles).
b. Edge Polishing: Enhancing optical clarity and smoothness through edge polishing.
c. Chemical Strengthening: Ion-exchange strengthening to increase glass durability and impact resistance.

 

3.      Challenges and Solutions in the Bonding Process
Because of the curved edges of 2.5D glass, controlling bubbles and maintaining uniform pressure during OCA/OCR bonding become major challenges.
URT adopts the following solutions to ensure high bonding quality:
a. Precise control of lamination pressure and speed to prevent edge bubbles.
b. Custom jigs designed according to glass curvature to enhance bonding uniformity.
c. Incorporation of vacuum pre-press and thermal post-press processes to ensure proper OCA adhesion.

 

4.      URT’s Technical Capability

URT possesses integrated precision machining and optical bonding capabilities for 2.5D cover glass. We offer customized edge profiles and process parameters to meet various design requirements while ensuring both aesthetics and reliability.