Patent ID: 11916008
Assignee: WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A chip-on-film (COF) packaging method, comprising steps of:
step S10: providing a flexible substrate and a chip, wherein the flexible substrate is a film;
step S20: forming a first groove on a first surface of the flexible substrate, wherein the first groove is matched with a peripheral shape of the chip, the first groove is provided with a protrusion, and a height of the protrusion is less than a depth of the first groove;
step S30: disposing a substrate bonding pad in the first groove of the flexible substrate;
step S40: forming a second groove on a second surface of the chip matched with the protrusion in the first groove, wherein the substrate bonding pad is disposed on a bottom of the first groove;
step S50: disposing a chip bonding pad on the second surface of the chip corresponding to the substrate bonding pad, wherein the chip bonding pad is disposed outside the second groove; and
step S60: embedding the chip in the flexible substrate and electrically connecting the chip bonding pad and the substrate bonding pad through an anisotropic conductive film;
wherein the film and the chip disposed on the film form a COF packaging structure.