Flexible flat cable

A flexible flat cable including:

• a first flexible flat cable and a second flexible flat cable, wherein:
• an end of the first flexible flat cable is connected with a first terminal;
• an another end of the first flexible flat cable is provided with a plurality of first pads;
• an end of the second flexible flat cable is connected with a second terminal;
• an another end of the second flexible flat cable is provided with a plurality of second pads connected with the plurality of first pads in one-to-one correspondence;
• wherein the first flexible flat cable has a front side and a back side and the plurality of first pads are alternatively arranged on the front side and the back side of the first flexible cable;
• and
• wherein the second flexible flat cable has a front side and a back side and the plurality of second pads are alternatively arranged on the front side and the back side of the second flexible cable, the first pads and the second pads being connected with each other by having the first and second pads overlapping each other in a thickness direction defined between the front side and back side of the first flexible flat cable or the front side and the back side of the second flexible flat cable;
• wherein the first flexible flat cable includes a plurality of first portions for arranging a first type of pads among the plurality of first pads on the back side of the first flexible flat cable, and wherein the second flexible flat cable includes a plurality of second portions for arranging a second type of pads among the plurality of second pads on the front side of the second flexible flat cable, and a shape of the plurality of first portions is complementary with a shape of the plurality of first portions;
• wherein the another end of the first flexible flat cable and the another end of the second flexible flat cable are both in a sawtooth shape, and a shape of the another end of the first flexible flat cable is complementary with a shape of the another end of the second flexible flat cable;
• each of the plurality of first portions is a protruding portion of a plurality of protruding portions of the sawtooth shape of the first flexible flat cable, and each of the plurality of second portions is a recessed portion of a plurality of second portions of the sawtooth shape of the second flexible flat cable.