Application of Touch Screen Lamination in Mobile Phones

A mobile phone screen consists of three major parts: Protective glass, Touch screen, and Display screen. Lamination by OCA or OCR is normally done to bond these components tightly and seamlessly, ensuring structural integrity and visual clarity.

With increasing requests for thinner designs and better user experiences, Full Lamination has become the industry standard. This process involves two critical bondings: Sense Glass to PSA, and Sense Glass to Cover Glass.

During this stage, sensors are placed on the equipment surface. The release paper on the upper layer of the OCA is removed manually, after which the device performs automatic alignment and lamination with micron-level precision.

This step involves laminating the sensor (with OCA film) to the cover glass. Both parts are placed on the equipment surfaces, and after CCD automatic alignment, they are bonded within a vacuum chamber.

Canrill Optics provides specialized optical telecentric lenses that effectively assist with this alignment, ensuring high-precision results throughout the bonding process.

COG (Chip on Glass): Binding the IC chip onto the LCD. A vision system captures IC circuitry images to fix the chip onto LCD lines with accuracy within fractions of a millimeter.

FOC (FPC to LCD): Utilizing precise visual alignment to assist with soldering narrow widths. Canrill's FOG solution achieves minimum spacing down to 3mm using prism assemblies.

Prisms solve critical spatial and multi-image stitching issues throughout the lamination process. They are essential for equipment where vertical space is limited or where multiple camera feeds must be combined.

① Saving Vertical Space

② Realize Image Stitching