Patent ID: 7279063
Filing Date: 2007-10-09
Classification: H01L

Abstract:
1. A method of bonding a cover plate over a plurality of encapsulated top-emitting OLED devices formed on a surface of a device substrate wherein each one of the plurality of OLED devices includes a pixelated display area and at least one electrical interconnect area, comprising: a) providing a flow-preventing pattern by forming grooves on a surface of the cover plate or a surface of the OLED devices and at least at positions corresponding to positions of the electrical interconnect areas of the OLED devices to prevent flow of a flowable adhesive material into at least outermost portions of such interconnect areas; b) dispensing a selected amount of a flowable curable adhesive material on the surface of the cover plate or a surface of the OLED devices in registration with the flow-preventing pattern; c) engaging the cover plate in alignment with the device substrate so that the selected amount of the flowable adhesive material flows to spread to a nearest edge or to nearest edges of the flow-preventing pattern and over the pixelated display area of each one of the plurality of OLED devices and being prevented from flowing or spreading into the flow-preventing pattern so that outermost portions of the interconnect areas are free from any adhesive material; d) curing the spread adhesive material to provide uniform bonding between the cover plate and at least the pixelated display area of each OLED device, thereby achieving a structural buffer layer; and e) singulating the OLED devices and the bonded cover plate to provide individual top-emitting OLED devices having a bonded cover plate and permitting access to the at least one electrical interconnect area for attaching electrical leads thereto.