Flexible flat cable comprising stacked insulating layers covered by a conductive outer skin and method for manufacturing

A flexible flat cable comprising:

• a plurality of ground parts are spaced apart from each other;
• a plurality of signal transmission parts comprising conductive material disposed between the plurality of ground parts;
• an outer skin covering the plurality of signal transmission parts and the plurality of ground parts;
• and
• a conductive adhesive layer disposed between the plurality of ground parts, the plurality of signal transmission parts and the outer skin,
• wherein each of the plurality of signal transmission parts comprises a respective insulating member and a respective strip line disposed within the corresponding insulating member,
• wherein each of the plurality of ground parts comprises a respective ground member which is disposed on the same plane as the plurality of signal transmission parts and a corresponding conductive adhesive block coupled to the respective ground member with the conductive adhesive layer,
• wherein the respective insulating member includes a first insulating layer and a second insulating layer laminated on the first insulating layer, the second insulating layer having a smaller width than a width of the first insulating layer,
• each respective ground member comprising a conductive material disposed in portions of the corresponding first insulating layer on which the corresponding second insulating layer is not laminated, and
• wherein the outer skin comprises a conductive film.

A method of manufacturing a flexible flat cable, the method comprising:

• providing a first insulating layer having a copper thin film layer formed on one surface;
• etching a portion of the copper thin film layer to form a strip line and a pair of ground members;
• laminating a second insulating layer on the etched copper thin film layer;
• etching a portion of the first insulating layer corresponding to the pair of ground members;
• and
• covering the first and second insulating layers with a shield film to which a conductive adhesive is applied.