NOVELTY - A multilayer film structure comprises a layer (Layer B) and a bottom layer (Layer C), each layer having opposing facial surfaces in adhering contact with the other layer, where: (B) Layer B comprises a crystalline block copolymer composite (CBC) or a specified block copolymer composite (BC); and (C) bottom Layer C comprises a polyolefin having at least one melting peak greater than 125 degrees C and has a top facial layer and a bottom facial surface.    USE - The multilayer film structure is useful for manufacturing an electronic device (ED) module (claimed).    ADVANTAGE - The multilayer film structure is highly improved and modified to produce PV modules with increased lifetime.    DETAILED DESCRIPTION - A multilayer film structure comprises a layer (Layer B) and a bottom layer (Layer C), each layer having opposing facial surfaces in adhering contact with the other layer, where: (B) Layer B comprises a crystalline block copolymer composite (CBC) or a specified block copolymer composite (BC), comprising: (i) an ethylene polymer (EP) comprising at least 80 mol% polymerized ethylene; (ii) an alpha-olefin-based crystalline polymer (CAOP); and (iii) a block copolymer comprising (a) an ethylene polymer block comprising at least 80 mol% polymerized ethylene, and (b) a crystalline alpha-olefin block (CAOB), or a mixture of the composites; and (C) bottom Layer C comprises a polyolefin having at least one melting peak greater than 125 degrees C and has a top facial layer and a bottom facial surface, the top facial surface of Layer C in adhering contact with the bottom facial surface of Layer B. INDEPENDENT CLAIMS are:    (1) an electronic device (ED) module comprising an electronic device and the multilayer film structure; and    (2) a lamination process to construct a laminated photovoltaic (PV) module comprising: (1) bringing at least the following layers into facial contact in the following order: (a) a light-receiving top sheet layer having an exterior light-receiving facial surface and an interior facial surface; (b) a light transmitting thermoplastic polymer encapsulation layer, having one facial surface directed toward the top sheet layer and one directed toward a light-reactive surface of a PV cell; (c) a PV cell have a light reactive surface; (d) a second encapsulating film layer; and (e) a backsheet layer comprising the multilayer film structure; and (2) heating and compressing the layers of step (1) at conditions sufficient to create the needed adhesion between the layers and, if needed in some layers or materials, initiation of their cross-linking.