Flat flexible printed circuit
Embodiment relates to a flat flexible printed circuit and, more specifically, to a flat flexible printed circuit which is flexible, due to the inclusion of films, and on which a surface mount technology (SMT) terminal can be mounted. According to the embodiment, the flat flexible printed circuit includes a film material capable of withstanding high temperatures, and thus can be electrically connected to an external device in a high-temperature environment and, as a result, is highly versatile.
1 . A flat flexible printed circuit comprising: a cable part including a first film, a plurality of conductors disposed on the first film, and a second film attached to the first film so as to face the plurality of conductors; a first connector part disposed at an end of the cable part and electrically connected to the plurality of conductors to an external device; a terminal connection part formed by perforating a portion of the first film to expose at least one of the plurality of conductors such that a surface-mount terminal can be connected to the at least one of the plurality of conductors, wherein the terminal connection part includes a support line which physically supports a connection of the surface-mount terminal using the at least of the plurality of conductors not electrically connected to the surface-mount terminal; an inspection part located in a direction toward the first connector part from the terminal connection part, the inspection part being formed by perforating a portion of the first film corresponding to the at least one of the plurality of conductors so as to allow electrical inspection of the at least one of the plurality of conductors, wherein the inspection part is arranged in a number equal to a number of conductors connected to the surface-mount terminal; a penetration part located at a predetermined distance from the terminal connection part in a direction opposite to the first connector part, the penetration part perforating the at least one of the plurality of conductors and corresponding areas of the first film and the second film to disconnect the at least one of the plurality of conductors after a position where the at least one of the plurality of conductors is electrically connected to the terminal connection part; and a support part which penetrates a portion of the cable part excluding the terminal connection part to support the cable part on the external device.
2 . The flat flexible printed circuit according to claim 1 , wherein the cable part includes:
a first branch cable part branching in a lengthwise direction and including a first number of conductors among the plurality of conductors, and
a second branch cable part including a second number of conductors different from the first number of conductors among the plurality of conductors.
3 . The flat flexible printed circuit according to claim 2 , wherein the first branch cable part or the second branch cable part includes a bent portion bent at a predetermined angle in a widthwise direction of the cable part to be electrically connected to an external device.
4 . The flat flexible printed circuit according to claim 3 , wherein the bent portion is indicated by a bent line on a portion of the first film or the second film where the first branch cable part or the second branch cable part is bent.
5 . The flat flexible printed circuit according to claim 1 , wherein the cable part includes a folding portion in which some conductors among the plurality of conductors are cut to generate a cut point and folded.
6 . The flat flexible printed circuit according to claim 5 , wherein the folding portion includes a support hole portion to prevent tearing at the cut point.
7 . The flat flexible printed circuit according to claim 1 , wherein the terminal connection part includes a coupling tool fastening portion which electrically connects some exposed conductors externally using a coupling tool by perforating some conductors exposed to some areas of the first film and the second film corresponding to the some exposed conductors.
8 . The flat flexible printed circuit according to claim 7 , wherein the coupling tool is a rivet or bolt made of a material conducting electricity.
9 . The flat flexible printed circuit according to claim 1 , wherein the terminal connection part includes a bonding portion which electrically connects some exposed conductors externally by applying bonding agents to some conductors exposed to some area of the first film.
10 . The flat flexible printed circuit according to claim 1 , wherein the terminal connection part comprises a fusion coupling portion which electrically fuses and bonds some conductors exposed to some areas of the first film and the second film externally.
11 . The flat flexible printed circuit according to claim 10 , wherein the fusion coupling portion electrically connects the some conductors exposed externally through laser or ultrasound.
12 . The flat flexible printed circuit according to claim 1 , wherein the first connector part includes:
a first partial connector part which electrically connects some conductors of the plurality of conductors included in the cable part externally; and
a second partial connector part which is cut in a lengthwise direction of the cable part and separated differently from the first partial connector part to connect other some conductors externally.
13 . The flat flexible printed circuit according to claim 12 , wherein the first partial connector part and the second partial connector part are separated from each other and have different lengths up to ends thereof.
14 . The flat flexible printed circuit according to claim 1 , further comprising:
a second connector part which is positioned at another end of the cable part to electrically connect some conductors included in the cable part externally.
15 . The flat flexible printed circuit according to claim 14 , wherein the second connector part includes:
a first partial end connector part which connects some conductors of multiple conductors included in the cable part externally; and
a second partial end connector part which is cut in a lengthwise direction of the cable part and separated differently from the first partial end connector part to connect other conductors externally.
16 . The flat flexible printed circuit according to claim 15 , wherein the first partial end connector part and the second partial end connector part are separated from each other and have different lengths up to ends thereof.