Array substrate and method for fabricating the same, display panel, display device

A method for fabricating an array substrate,

• wherein the array substrate comprises a display region and a peripheral region surrounding the display region,
• wherein the peripheral region comprises a data line lead region and a driving circuit region, and the data line lead region is between the driving circuit region and the display region;
• wherein the driving circuit region comprises a driving circuit, the data line lead region comprises a plurality of data line leads, and the plurality of data line leads extend from the display region and are electrically connected with the driving circuit;
• wherein the data line lead region comprises peripheral data line leads, and the method comprises:
• forming at least one retaining wall in a region of the peripheral region close to the peripheral data line leads, wherein the at least one retaining wall is configured to prevent plasma from affecting the peripheral data line leads, and an orthographic projection of the at least one retaining wall on the array substrate and an orthographic projection of the plurality of data line leads and the peripheral data line leads on the array substrate do not overlap.