Process Introduction of Metal Mesh PCAP Touch Screen
1. Incoming Material
OCA and Product Materials: The process begins with the incoming of OCA (Optically Clear Adhesive). There are two types: upper OCA and lower OCA. The upper OCA goes through a punching process first. For product materials, after they arrive, they are inspected. If they pass the inspection, they move to the next step; otherwise, they are rejected.
2. Film - related Processes
Dry Film Lamination: The qualified product materials undergo dry film lamination.
Back - protection Lamination: After dry film lamination, back - protection film is laminated.
Exposure and Development: The material then goes through exposure and subsequent processes of development, etching, and film stripping.
3. OCA Lamination
Lower OCA Lamination: After the previous processes and passing the inspection, the product is laminated with lower OCA.
Upper OCA Lamination: Then, it is laminated with upper OCA after the upper product has been punched.
4. Assembly and Cleaning
Product Cleaning: Both upper and lower products are cleaned.
Product Bonding: After cleaning and passing the inspection, the upper and lower products are bonded together.
5. Post - Bonding Processes
External Shaping by Laser: The bonded product undergoes external shaping by laser.
Degassing: After laser shaping, degassing is carried out to remove any air bubbles.
6. FPC - related Operations
FPC Baking and Electrical Testing: FPC (Flexible Printed Circuit) is baked and undergoes electrical testing.
FPC Conductive Tape Lamination: Then, conductive tape is laminated on the FPC.
7. Testing and Inspection
Semi - finished Product Functional Testing: The semi - finished product is subjected to functional testing.
Sensor Appearance Inspection: After functional testing, the sensor's appearance is inspected.
8. Bonding and Sealing
Bonding: The product goes through a bonding process.
Metallographic Inspection: After bonding, a metallographic inspection is conducted.
Sealing: If the metallographic inspection is passed, the product is sealed.
9. Further Assembly and Testing
Cover Glass (CG) / Sensor Bonding: After sealing and passing the semi - finished product functional testing again, the CG and sensor are bonded.
CG Process Film Lamination: Then, a CG process film is laminated.
Degassing Again: Another degassing process is carried out.
10. Final Inspection and Shipment
Back - protection Film and Auxiliary Material Lamination: After degassing and passing the inspection, back - protection film and auxiliary materials are laminated.
TP Appearance Inspection: The touch panel's appearance is inspected.
Finished Product Functional Testing: Finally, the finished product undergoes functional testing. If it passes, it is ready for shipment.
