Flexible cable, flexible cable mount method, semiconductor device with flexible cable, led array head with flexible cable, image forming apparatus with such led array head

A light emitting element array head for exposing a photosensitive body, comprising:

• a plurality of chips each of which includes a plurality of light emitting elements arranged in line so that the light emitting elements thereof may be arranged at substantially equal intervals, said plurality of chips arranged in line;
• a driving unit that drives said plurality of light emitting elements;
• and
• a flexible cable for electrically connecting said plurality of light emitting elements and said driving unit, said flexible cable having an electric wire for connecting each of said plurality of chips and said driving unit, said flexible cable being flat and elongated along the direction of the arrangement of the light emitting elements,
• wherein the electric wire is arranged into a plurality of spaced electric wire groups comprising a plurality of spaced wires and the spaces between adjoining electric wire groups are greater than the spaces between the electric wires in each of the electric wire groups, and
• wherein said light emitting element array head further comprises a split preventing hole, provided between the adjoining electric wire groups, for preventing said flexible cable from splitting.