TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The surface features are pyramidal surface features. Each surface feature of the surface features has a cross-section of 0.01-5 (preferably 0.02-3) mm. The polymer includes a copolymer of ethylene and an acrylic acid. The acrylic acid is a methacrylic acid. The polymer is an ionomer that includes zinc. The first layer comprises fluoropolymer. The fluoropolymer is fluorinated ethylene-propylene copolymer, ethylene tetrafluoroethylene copolymer (both preferred), polytetrafluoroethylene, per fluoro alkyl vinyl ether, polyvinylidene fluoride, polychlorotrifluoroethylene, tetrafluoroethylene copolymers with vinylidene fluoride or hexafluoropropylene, ethylene chlorotrifluoroethylene copolymer, a copolymer of ethylene and fluorinated ethylene propylene, a terpolymer of tetrafluoroethylene, hexafluoropropylene, and vinylidene fluoride, and/or a terpolymer of tetrafluoroethylene, hexafluoropropylene, and ethylene. The fluoropolymer is melt processable. The second layer is in direct contact with the first layer. The film further comprises a third layer disposed between the first layer and the second layer. The third layer comprises polyolefin or ionomer. The mean slope is at least 20 degrees , preferably at least 32 degrees . The polymer of the second layer has a storage modulus at: 65 degrees C of at least 5 MPa, preferably at least 12 MPa; and 50 degrees C of at least 15 MPa, preferably at least 20 MPa. The polymer of the second layer has an onset temperature of at least 55 degrees C, preferably at least 70 degrees C when measured using 10 mN force when using a 1 mm penetration probe. The polymer of the second layer has an onset temperature of at least 75 degrees C, preferably at least 85 degrees C when measured using 100 mN force when using a 1 mm penetration probe. The polymer has a melt flow rate of not greater than 6 (preferably not greater than 1) g/10 minutes. The polymer has a: Vicat softening point of at least 55 degrees C, preferably at least 64 degrees C; a Shore A hardness of at least 60, preferably at least 72; and tensile modulus of at least 15 (preferably 18-400) MPa. The first layer has a thickness of 12-100 (preferably 20-51) mu m. The second layer has a thickness of 20-1000 (preferably 400-700) mu m. The active component is a flexible or rigid photovoltaic device. Preferred Method: Patterning and laminating are performed concurrently. The patterning includes applying a plate or a roller including many protrusions forming the surface features. The patterning to provide the surface features includes patterning to form many pyramidal surface features, where each surface feature of the surface features has a cross-section of 0.2-10 (preferably 0.5-2) mm. The texture ratio is a least 0.45, preferably at least 0.65.