TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The inorganic barrier layer comprises metals, metal oxides, metal nitrides, metal carbides, metal oxynitrides and/or metal oxyborides. The metal is silicon, selenium, zinc, antimony or aluminum.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The organic barrier layer and inorganic barrier layer are alternatively formed. The organic barrier layer has gas emission rate of less than or equal to 1000 ppm. The moisture permeability of the organic barrier layer up to 5 mu m thickness in the thickness direction after maintaining at 37.8 degrees C under 100% relative humidity for 24 hours is 4.5 g/m2x 24 hours. The organic barrier layer has a thickness of 0.1-20 mu m. The inorganic barrier layer has a thickness of 5-500 nm.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The composition comprises 1-99 pts. wt. photocurable monomer and 1-99 pts. wt. (I). The composition further comprises a photoinitiator. The content of the photoinitiator is 0.1-20 pts. wt.. Preferred Components: (I) is 3-(2-(acryloyloxy)ethoxy)-2-hydroxypropyl 2-methylacrylate, 2-hydroxy-3-(2-(methacryloyloxy)ethoxy)propyl 2-methylacrylate, 3-(acryloyloxy)-2-hydroxypropyl 2-methylacrylate, 2-hydroxy-3-(methacryloyloxy)propyl 2-methylacrylate and/or 3-(4-(acryloyloxy)butoxy)-2-hydroxypropyl 2-methylacrylate. The photocurable monomer is Monomer with 1-30 optionally substituted vinyl groups, acrylate groups or methacrylate groups, preferably 1-20C alkyl (meth)acrylate, 2-20C diol di(meth)acrylate, 3-20C triol tri(meth)acrylate and/or 4-20 tetraol tetra(meth)acrylate. The photoinitiator is photopolymerization initiator. The organic barrier layer comprises cured product of the photocurable composition. EXAMPLE - Typical composition comprised of 15 pts. wt. hexyl acrylate, 35 pts. wt. hexanediol diacrylate, 10 pts. wt. pentaerythritol tetraacrylate, 40 pts. wt. 3-(2-(acryloyloxy)ethoxy)-2-hydroxypropyl 2-methylacrylate and 5 pts. wt. Darocur TPO (RTM: Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide).