Patent ID: 11948960
Assignee: TONGFU MICROELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 18:
19. The device according to claim 17, further including:
a first barrier layer, disposed on a side of the metal rewiring layer away from the plurality of pads, wherein the first barrier layer contains a third opening,
a second seed layer, disposed on a side of the first barrier layer away from the plurality of pads and covering the third opening,
an under-ball metal layer, disposed on a side of the second seed layer away from the plurality of pads, and
a solder ball, disposed on a side of the under-ball metal layer away from the plurality of pads, wherein the solder ball, the under-ball metal layer, the second seed layer, and the metal rewiring layer are electrically connected to each other.