Array substrate, method of manufacturing the same, and display panel

An array substrate, comprising:

• a substrate and an array functional layer disposed on the substrate;
• wherein the array substrate is provided with a through hole area comprising a through hole, a buffer area provided around the through hole area, and a display area provided around the buffer area;
• wherein the buffer area comprises part of the substrate and an inorganic film layer provided by the array functional layer disposed on the substrate;
• wherein a groove is formed in the inorganic film layer around the through hole area, the groove has a closed ring shape or a non-closed ring shape, and the groove has a depth less than a thickness of the array functional layer,
• wherein a block wall is disposed on the inorganic film layer in the buffer area and surrounds the through hole area, a first buffer area is defined between the block wall and the though hole area, a second buffer area is defined between the block wall and the display area, and the groove comprises a first groove provided in the first buffer area, and/or a second groove provided in the second buffer area, wherein each of the first groove and the second groove has the closed ring shape or the non-closed ring shape, wherein the inorganic film layer comprises at least two ring-shaped inorganic strip portions defined and spaced apart by the first groove in the first buffer area, wherein when the first groove is annularly closed in shape, at least one of the at least two ring-shaped inorganic strip portions has one or more gaps, and an organic material is disposed in the one or more gaps.