Patent ID: 8665407

Claim:
A chip-on-film (COF) structure for a liquid crystal panel, characterized in that: the COF structure comprises: a flexible substrate having an output edge connected with a liquid crystal panel; a first wire bonding portion having a plurality of lead strips of elongated shape, which are disposed on the flexible substrate and located at a center of the flexible substrate, wherein a long direction of the lead strips of the first wire bonding portion is perpendicular to the output edge; two second wire bonding portions having a plurality of lead strips of elongated shape, which are disposed on the flexible substrate and located at two sides of the first wire bonding portion, wherein a long direction of the lead strips of the second wire bonding portion is parallel to the output edge; a fan-out trace portion having a plurality of traces with a fan shape, which connect one end of the lead strips of the first wire bonding portion to the output edge, respectively; and two array trace portions having a plurality of traces with a turning corner shape, which connect one end of the lead strips of the second wire bonding portions to the output edge, respectively; wherein a width of the second wire bonding portion equals a length of the first wire bonding portion; the top lead strips of the second wire bonding portions are flushed with the top end of the first wire bonding portion; and the bottom lead strips of the second wire bonding portions are flushed with the bottom end of the first wire bonding portion.