Organic light emitting diode device fabrication method and organic light emitting diode device fabricated thereby
Disclosed is an organic light emitting diode device fabrication method that includes: preparing a substrate which is defined into a display area and a non-display area; forming a light emission portion, which includes a thin film transistor and an organic light emission layer in the display area, and a pad portion in a part of the non-display area; sequentially forming a sacrificial layer and an encapsulation passivation film throughout the display and non-display areas; and separating the sacrificial layer and the encapsulation passivation film from the pad portion through an irradiation of laser light.
1. A method of fabricating an organic light emitting diode device, the method comprising:
forming a light emission portion in a display area of a first substrate;
forming a pad portion in a non-display area of the first substrate;
forming a sacrificial layer over the light emission portion and the pad portion;
forming an encapsulation passivation film over the sacrificial layer; and
removing the sacrificial layer and the encapsulation passivation film from the pad portion by means of irradiation of laser light,
wherein the sacrificial layer has a higher absorption rate with respect to the irradiated laser light than the encapsulation passivation film.
2. The method of claim 1 , wherein the sacrificial layer and the encapsulation passivation film are irradiated with the laser light only in a portion of the non-display area of the first substrate.
3. The method of claim 1 , wherein the sacrificial layer is formed in a thickness range of 10˜500 nm.
4. The method of claim 1 , wherein the sacrificial layer is formed from at least one of amorphous silicon, zinc oxide and tin oxide.
5. The method of claim 1 , further comprising forming an adhesive layer between the sacrificial layer and the encapsulation passivation film.
6. The method of claim 1 , wherein the forming a light emission portion comprises forming an organic light emission layer in the display area of the first substrate.
7. The method of claim 1 , wherein the laser light smaller than band gap energy of the encapsulation passivation film but larger than band gap energy of the sacrificial layer.
8. The method of claim 1 , wherein the sacrificial layer is formed from amorphous silicon and the laser light with a wavelength of 532 nm.
9. The method of claim 1 , wherein the sacrificial layer 250 is formed from the laser light with a wavelength bend of 710˜1550 nm and one of zinc oxide and tin oxide.
10. The method of claim 5 , wherein the adhesive layer forces the sacrificial layer to be separated together with the encapsulation passivation film when the encapsulation passivation film is separated.
11. The method of claim 1 , wherein the non-display area comprises a first non-display area portion and a second non-display area portion, wherein the first non-display area portion is arranged between the display area and the second non-display area portion, wherein the pad portion is formed in the second non-display area portion.
12. The method of claim 11 , further comprising forming a second substrate that is combined with the first substrate with each other by a sealing material formed in the first non-display area portion.