the same method as described in example 1 an encapsulation film was formed by the same method as described in example 1 except that in preparation of a solution for a second layer the compound of formula 1 was not included an encapsulation film was formed by the same method as described in example 1 except that in preparation of a solution for a second layer the compound of formula 1 was replaced with lauryl methacrylate an encapsulation film was formed by the same method as described in example 1 except that a copper film a second layer and a first layer were sequentially stacked a pressure sensitive adhesive layer having a thickness of 50 u03bcm and a size of 14 cm u00d7 9 cm which was formed in any one of the examples and the comparative examples was attached to the center of a 0 7 t glass having a size of 150 cm u00d7 10 cm using a roll laminator a glass having the same size as the prepared specimen was laminated laminated for the second layer to be in contact with the glass by vertical pressing using a vacuum laminator at 25 to 100 u00b0 c and a vacuum degree of 100 pa under a pressure of 0 5 mpa a laminating property was determined by the degree of non lamination or bubble generation on the entire surfaces of a pressure sensitive adhesive and thus when non lamination or generation of at least one bubble having a diameter of 3 mm.