As one of the simplest ways of human-computer interaction,touch screen is rapidly replacing the traditional electronic display in recent years.Optically clear adhesive(OCA)is a transparent optical pressure-sensitive adhesive with high light transmittance and considerable adhesion,which is widely used to bond different layers of touch screen.OCA can effectively enhance the optical effect,touch responsiveness,and mechanical reliability of touch screen,reduce screen glare,and provide better visual experience for users.In this paper,the characteristics,classification,curing methods,bonding mechanisms,and technical progress of OCA were systematically introduced,and its future development prospects were also discussed.
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