Support film and forming method thereof, display panel and manufacturing method thereof

A flexible display panel, comprising a display area and a bonding area, wherein

• the flexible display panel comprises a substrate and a support film disposed on the substrate;
• the support film comprises:
• a first support portion and a second support portion which are juxtaposed on a first surface of the substrate of the display panel, wherein the first support portion is located in the bonding area, the second support portion is located at least in the display area, and a groove is provided between the first support portion and the second support portion to expose the first surface, wherein,
• the first support portion comprises:
• a first support base material and a first adhesive material which are stacked, wherein the first adhesive material adheres the first support base material on the first surface;
• the second support portion comprises:
• a second support base material and a second adhesive material which are stacked, wherein the second adhesive material adheres the second support base material on the first surface,
• wherein the first support base material has an elastic modulus different from an elastic modulus of the second support base material, the first support base material has a thickness different from a thickness of the second support base material, and a material of the first support base material is different from a material of the second support base material.