Laminated metal sheet, method of producing laminated metal sheet, and laminated metallic container

A laminated metal sheet comprising a first film laminated on at least one of a front surface and a back surface of a metal sheet, wherein

• the first film is homopolyethylene terephthalate or copolymer polyethylene terephthalate, wherein
• w(x) obtained by a linearly polarized laser Raman spectroscopic analysis for a cross section of the first film satisfies the following expressions (1) and (2):
• w
• 1730
• ID
• (
• 1.
• )
• ≤
• 20
• ⁢
• cm
• -
• 1
• (
• 1
• )
• w
• 1730
• ND
• (
• 1.
• )
• ≤
• 20
• ⁢
• cm
• -
• 1
• (
• 2
• )
• where w1730ID(x) is the full width at half maximum of a peak due to C═O stretching vibration in the vicinity of 1730 cm−1 when linearly polarized laser light is incident on the cross section of the first film at a position x μm away from the metal sheet side in the thickness direction of the film, with the polarization plane of the light being parallel to the in-plane direction of the film, and
• w1730ND(x) is the full width at half maximum of a peak due to C═O stretching vibration in the vicinity of 1730 cm−1 when linearly polarized laser light is incident on the cross section of the first film at a position x μm away from the metal sheet side in the thickness direction, with the polarization plane of the light being parallel to the thickness direction of the film.