An ethylene interpolymer film having one or more layers, comprising surface layer comprising: a silane-containing ethylene interpolymer comprising an ethylene interpolymer having a density of from greater than 0.85 g/cm 3 to less than 0.905 g/cm 3, and from at least 1.2 percent by weight to less than or equal to 5 percent by weight alkoxysilane; characterized by: having a volume resistivity of greater than 5 × 10 15 ohm-cm as measured at 60°C, and having, after crosslinking, a gel content of at least 60% wherein the ethylene interpolymer has a residual boron content of less than 10 ppm and a residual aluminum content of less than 100 ppm, both contents being based on weight of ethylene interpolymer, and wherein the ethylene interpolymer is selected from the group comprising very low density polyethylene, homogeneously branched, linear ethylene/α-olefin interpolymers, and homogeneously branched, substantially linear ethylene/α-olefin polymers, wherein the ethylene interpolymer is prepared using a catalyst comprising a complex of bis-(biphenylphenol) ligands coordinated through oxygen atoms to a transition metal; and wherein the ethylene interpolymer is prepared using a cocatalyst consisting of a modified methyl aluminoxane type cocatalyst and substantially excluding any boron-containing cocatalyst. a silane-containing ethylene interpolymer comprising an ethylene interpolymer having a density of from greater than 0.85 g/cm 3 to less than 0.905 g/cm 3, and from at least 1.2 percent by weight to less than or equal to 5 percent by weight alkoxysilane; characterized by: having a volume resistivity of greater than 5 × 10 15 ohm-cm as measured at 60°C, and having, after crosslinking, a gel content of at least 60% wherein the ethylene interpolymer has a residual boron content of less than 10 ppm and a residual aluminum content of less than 100 ppm, both contents being based on weight of ethylene interpolymer, and wherein the ethylene interpolymer is selected from the group comprising very low density polyethylene, homogeneously branched, linear ethylene/α-olefin interpolymers, and homogeneously branched, substantially linear ethylene/α-olefin polymers, wherein the ethylene interpolymer is prepared using a catalyst comprising a complex of bis-(biphenylphenol) ligands coordinated through oxygen atoms to a transition metal; and wherein the ethylene interpolymer is prepared using a cocatalyst consisting of a modified methyl aluminoxane type cocatalyst and substantially excluding any boron-containing cocatalyst. an ethylene interpolymer having a density of from greater than 0.85 g/cm 3 to less than 0.905 g/cm 3, and from at least 1.2 percent by weight to less than or equal to 5 percent by weight alkoxysilane; having a volume resistivity of greater than 5 × 10 15 ohm-cm as measured at 60°C, and having, after crosslinking, a gel content of at least 60% wherein the ethylene interpolymer has a residual boron content of less than 10 ppm and a residual aluminum content of less than 100 ppm, both contents being based on weight of ethylene interpolymer, and wherein the ethylene interpolymer is selected from the group comprising very low density polyethylene, homogeneously branched, linear ethylene/α-olefin interpolymers, and homogeneously branched, substantially linear ethylene/α-olefin polymers, wherein the ethylene interpolymer is prepared using a catalyst comprising a complex of bis-(biphenylphenol) ligands coordinated through oxygen atoms to a transition metal; and wherein the ethylene interpolymer is prepared using a cocatalyst consisting of a modified methyl aluminoxane type cocatalyst and substantially excluding any boron-containing cocatalyst.