Signal transmission cable and cable assembly

A signal transmission cable, comprising:

• a conductor;
• an insulator covering a periphery of the conductor;
• and
• a shield layer covering a periphery of the insulator,
• wherein the shield layer includes a lateral winding shield portion comprising a plurality of metal wires being helically wrapped around the periphery of the insulator to cover the periphery of the insulator, and a batch plating portion comprising a hot dip plating, which is covering a periphery of the lateral winding shield portion,
• wherein the shield layer includes a space portion where adjacent wires of the plurality of metal wires in a circumferential direction are spaced apart from each other and a contact portion where adjacent wires of the plurality of metal wires in the circumferential direction are in contact with each other,
• wherein the shield layer includes outer peripheral portions where the plurality of metal wires is being covered with the batch plating portion, forming a joining portion,
• wherein where a diameter of each of the metal wires is d and a thickness of the batch plating portion from an outer surface of each of the metal wires is t, a following formula is met over an entire cable circumference,
• t<0.5d, and
• when being bent in a U-shape within a range of a bending strain of 35% or less, no cracks occur in the batch plating portion,
• an outer peripheral surface of the joining portion is located radially outward with respect to outer peripheral surfaces of the outer peripheral portions,
• wherein the diameter d of each metal wire is 0.10 mm or less, and
• wherein the thickness t of the batch plating portion from the outer surface of the metal wires is expressed as t<0.5d (mm).