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

Claim 1:
2. The method according to claim 1, wherein providing the chip includes:
providing a wafer, wherein:
the wafer contains a plurality of chip substrates arranged in a matrix, and a dicing groove is formed between adjacent chip substrates of the plurality of chip substrates,
the wafer has a front surface and a back surface, the front surface of the wafer is the front surface of the chip substrate, and the back surface of the wafer is the back surface of the chip substrate, and
the photosensitive region and the plurality of pads disposed around the photosensitive region are disposed over the front surface of the chip substrate;

forming the transparent protection layer over the front surface of the wafer, wherein the transparent protection layer covers the photosensitive region and the plurality of pads on each chip substrate;
forming the through-hole in the wafer from the back surface of the wafer at a 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; and
cutting the wafer and the transparent protection layer between adjacent two through-holes, to obtain a plurality of single chips.