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

Claim 4:
5. The method according to claim 2, before forming the through-hole in the wafer from the back surface of the wafer at the position corresponding to the dicing groove, to make the plurality of pads on both sides of the dicing groove on each chip substrate be exposed from the through-hole, further including:
providing a substrate on a side of the transparent protection layer away from the wafer;
polishing the back surface of the wafer to make the wafer have a thickness less than or equal to a predetermined thickness; and
after electrically connecting the pad of the plurality of pads of the chip to the circuit board through the metal rewiring layer in the through-hole, removing the substrate.