Liquid optically clear adhesive

Liquid optically-clear adhesive (LOCA) is liquid-based bonding technology used in touch panels and display devices to bind the cover lens, plastic, or other optical materials to the main sensor unit or each other.

Optical bonding, including LOCA and non-liquid OCA tape, are used in a wide range of electronic equipment, especially those with touch panels.

After application, the adhesive is cured onto the device through ultraviolet light (UV), heat, moisture, or a combination, depending on the manufacturer and specifications.

Major applications include capacitive touch panels, 3D televisions (3D TV), and glass retarders.

Application is expected to increase as mobile devices, televisions, tablets, monitors and laptops migrate to touch interfaces.

The curing process and inherent low modulus of silicone LOCA also helps reduce the amount of haze around the edges of large LCD screens.