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

Claim 0:
1. A chip-on-film (COF) packaging structure, comprising:
a flexible substrate comprising a first groove provided on a first surface of the flexible substrate, a protrusion provided in the first groove, and a substrate bonding pad disposed in the first groove, wherein a height of the protrusion is less than a depth of the first groove, and the substrate bonding pad is disposed on a bottom of the first groove and spaced with the protrusion; the flexible substrate is a film; and
a chip disposed on the film and comprising a second groove provided on a second surface of the chip, and a chip bonding pad disposed on the second surface and corresponding to the substrate bonding pad, wherein the chip bonding pad is disposed outside the second groove;
wherein the first groove of the flexible substrate is matched with a peripheral shape of the chip, and the second groove is matched with the protrusion of the first groove to embed the chip in the flexible substrate; and
wherein the chip bonding pad is electrically connected to the substrate bonding pad through an anisotropic conductive film.