Lamination Alignment Deviation (Lamination Precision Error)
Problem Description:
Position deviation occurs in the lamination area, resulting in the failure of lamination precision between the product and the functional film (such as OCA/AB adhesive).
Standardized Solution:
1.Incoming Material Quality Inspection: Prioritize checking the incoming material inspection report to confirm that key indicators such as dimensional tolerance, positioning datum, and geometric tolerance of the substrate and functional film are normal, thereby eliminating precision defects of the incoming materials themselves.
2.Precise Alignment Correction: On the premise of qualified incoming materials, use a 2D image measuring instrument to quantify the offset (including X/Y-axis linear deviation and angular deviation), and precisely adjust the positioning datum of the upper and lower molds based on the measurement results.
3.Closed-Loop Verification and Optimization: Perform a test lamination after parameter adjustment, and recheck the lamination precision with a 2D image measuring instrument. If deviation still exists, repeat the above measurement-adjustment process until the alignment precision meets the process requirements.
Bubble Defects After Lamination
Problem Description:
After lamination, bubble-like appearance defects appear on the product interface, which are divided into two categories: front-end bubbles and middle-rear bubbles according to the location where bubbles are generated.
Standardized Solution:
1.Front-End Bubble Elimination Solution: For bubbles in the front-end area of product lamination, optimize the process by raising the height of the upper suction plate to ensure that a safety gap of 0~2mm is maintained between the front end of the product and the OCA/AB adhesive layer at the initial stage of lamination, avoiding premature air sealing at the front end.
2.Middle-Rear Bubble Elimination Solution: For bubbles in the middle-rear area of product lamination, optimize the pressing process by lowering the height of the lamination roller to ensure uniform pressing force of the roller, providing sufficient channels for air exhaust and avoiding local premature pressing.
Surface Imprint Defects After Lamination
Problem Description:
After lamination, indentation and imprint-like appearance defects appear on the product surface, affecting the product's appearance and performance.
Standardized Solution:
Optimize the lamination process by lowering the height of the pressing wheel, strictly control the pressing force of the pressing wheel to avoid excessive pressure. The process verification standard is: the laminated product can smoothly pass through the pressing wheel with a light manual push and can drive the pressing wheel to rotate smoothly without jamming or hard pressing.
