Bonding technologies: liquid optically clear adhesive (LOCA) (part 2 of 3)

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By Steve Baker | Sep 30, 2015
Vacuum laminator for bonding

In this second article of a three part bonding blog series, we will focus on the most widely used bonding capability at GMN, liquid optically clear adhesive (LOCA) bonding. This process, primarily used when bonding two rigid materials, is typically chosen for its increased impact resistance, sunlight readability, and optical clarity.

GMN Engineers developed the custom fixturing and a program that contains the proper amount of adhesive, a dispensing pattern, and requisite sealing and dam applications. Highly precise metering equipment dispenses a consistent amount of liquid adhesive on each assembly. Components are bonded in a class 10,000 clean room and then the adhesive is UV-cured. GMN then employs a series of sophisticated test and inspection methods to ensure quality control. 

LOCA bonding is a robust technology that GMN has been providing for more than 6 years. This technology is highly regarded due to its strong overall performance and ability to increase impact resistance. To see the strength of this resistance for yourself, watch our ball drop test comparing LOCA bonding to air gap bonding. Another major benefit of LOCA bonding is the optical clarity. This is achieved by using a liquid adhesive that doesn’t allow air gaps to form in the stack up. GMN leverages proprietary processes and adhesives to provide the best bonding solutions to our customers. 

LOCA bonding is also a popular solution because it is a re-workable process. If needed, the components can be salvaged and re-used, increasing overall manufacturing yields. Coming up in our final bonding blog article, we will discuss the third bonding capability at GMN, the rigid-to-rigid optically clear adhesive bonding.

Read our other blogs in the bonding series:

Bonding technologies: air gap bonding (part 1 of 3)

Bonding technologies: rigid-to-rigid optically clear adhesive (OCA) (part 3 of 3)