ALD Nanolaminate Encapsulation for OLED Moisture Barrier

The patent applies composite materials by creating a nanolaminate structure consisting of alternating layers of titanium oxide and lanthanum oxide. This multi-material composite approach allows the encapsulation to simultaneously achieve high barrier properties against moisture and oxygen while maintaining good optical transmission for visible light, resolving the contradiction between protection effectiveness and optical transparency.

The encapsulation layer is segmented into multiple thin alternating layers of different materials (titanium oxide and lanthanum oxide) rather than using a single homogeneous layer. This segmentation into nanoscale lamellae enables each material to contribute its specific properties - titanium oxide providing barrier function and lanthanum oxide providing optical transparency - thereby resolving the contradiction between protection and transparency.

By using composite nanolaminate structure with alternating titanium oxide and lanthanum oxide layers, the patent achieves high barrier effectiveness despite reduced overall thickness. The composite nature allows light to pass through the transparent lanthanum oxide layers while the titanium oxide layers provide the necessary barrier function, thus resolving the contradiction between thinness for transparency and thickness for barrier effectiveness.

Different regions of the encapsulation structure are assigned different local qualities - titanium oxide layers are positioned to provide barrier function while lanthanum oxide layers are positioned to provide optical transparency. This local differentiation of material properties within the nanolaminate structure allows the thin encapsulation to simultaneously achieve both transparency and barrier effectiveness.