Flexible oled display panel and manufacturing method thereof

A method of manufacturing a flexible OLED display, comprising:

• a step 1 of providing a flexible substrate and preparing a TFT layer on a surface of the flexible substrate, wherein the flexible substrate comprises a display area and a non-display area surrounding the display area, and wherein the non-display area comprises a corner sub-area located at a corner of the flexible substrate;
• a step 2 of forming a dam surrounding the display area within the non-display area of the TFT layer, forming at least one groove on at least one lateral side of the dam within the corner sub-area of the TFT layer, wherein an undercut structure is formed on an inner wall of the groove, and the undercut structure is located in the flexible substrate;
• and
• a step 3 of sequentially preparing a luminescent layer and an encapsulation layer in order on a surface of the TFT layer, wherein both of the luminescent layer and the encapsulation layer cover the dam and the groove;
• and sequentially preparing a second flatten layer, a touch layer, and a polarizing layer in order on a surface of the encapsulation layer.