Patent ID: 11934606
Assignee: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 17:
18. A flexible circuit board comprising:
a main body sub-circuit board comprising a first substrate, and a first bridge connection end, a second bridge connection end, a first wiring portion and a second wiring portion on the first substrate, in which the first wiring portion and the second wiring portion are separated from each other and electrically connected to the first bridge connection end and the second bridge connection end, respectively;
a bridge sub-circuit board comprising a second substrate, and a third bridge connection end, a fourth bridge connection end and a third wiring portion for a first functional wiring on the second substrate, in which the third bridge connection end and the fourth bridge connection end are electrically connected by the third wiring portion; wherein
the bridge sub-circuit board is configured to be installed on the main body sub-circuit board by respectively electrically connecting the third bridge connection end and the fourth bridge connection end to the first bridge connection end and the second bridge connection end, so that the first wiring portion, the third wiring portion and the second wiring portion are sequentially electrically connected to obtain the first functional wiring;
an outline shape of the first substrate is different from that of the second substrate;
the main body sub-circuit board comprises a first main body wiring layer at a first side of the first substrate and a first main body insulating layer laminated on a side of the first main body wiring layer far away from the first substrate, and the first side is a side of the main body sub-circuit board close to the bridge sub-circuit board; the main body sub-circuit board further comprises a second main body wiring layer at a second side of the first substrate and a second main body insulating layer laminated on a side of the second main body wiring layer far away from the first substrate; a part of the first wiring portion is in the first main body wiring layer, and another part of the first wiring portion is in the second main body wiring layer; a part of the second wiring portion is in the first main body wiring layer, and another part of the second wiring portion is in the second main body wiring layer; a second functional wiring is all in the first main body wiring layer, and a third functional wiring is all in the second main body wiring layer; the first main body insulating layer has a first via hole exposing the first bridge connection end and the second bridge connection end; at least some of wirings of the first wiring portion in the second main body wiring layer are electrically connected to the first main body wiring layer through a second via hole, for electrically connecting to the bridge sub-circuit board through the first bridge connection end; and at least some of wirings of the second wiring portion in the second main body wiring layer are electrically connected to the first main body wiring layer through the second via hole, for electrically connecting to the bridge sub-circuit board through the second bridge connection end;
the bridge sub-circuit board comprises a first bridge wiring layer at a first side of the second substrate and a first bridge insulating layer laminated on a side of the first bridge wiring layer far away from the second substrate, in which the first bridge wiring layer comprises the third wiring portion; the bridge sub-circuit board further comprises a ground layer at a second side of the second substrate opposite to the first side thereof, and when the bridge sub-circuit board is installed on the main body sub-circuit board, the second side is closer to the main body sub-circuit board than the first side; the bridge sub-circuit board further comprises a second bridge insulating layer laminated on a side of the ground layer far away from the second substrate, and the second bridge insulating layer is provided with a plurality of openings exposing a part of the ground layer, and the plurality of openings serve as the third bridge connection end and/or the fourth bridge connection end, for electrically connecting the bridge sub-circuit board to the main body sub-circuit board.