Multi-layer film, display panel and manufacturing method thereof, and display apparatus

1. A multi-layer film, comprising: a first region and a second region, wherein:

the first region comprises a first bonding layer and a first planarization layer directly contacted with each other; and

the second region comprises a second bonding layer, a second planarization layer, and an intervention layer between the second bonding layer and the second planarization layer,

wherein the intervention layer comprises a first support layer; and

the intervention layer further comprises a first barrier layer between the first support layer and the second bonding layer.

2. The multi-layer film of claim 1 , wherein the first planarization layer has a larger thickness than the second planarization layer.

3. The multi-layer film of claim 1 , wherein the first bonding layer and the second bonding layer comprise an acrylate polymer.

4. The multi-layer film of claim 1 , wherein the second bonding layer has a larger thickness than the first bonding layer.

5. A display panel, comprising:

the multi-layer film of claim 1 ;

a display layer on a side of the multi-layer film adjacent to the first bonding layer and the second bonding layer; and

wherein the display layer in the first region is configured to emit light to a side of the display layer opposite from the multi-layer film under a folded status.

6. A display apparatus, comprising the display panel of claim 5 , a power supplying circuit and a signal processor.

7. A multi-layer film, comprising: a first region and a second region, wherein:

the first region comprises a first bonding layer and a first planarization layer directly contacted with each other; and

the second region comprises a second bonding layer, a second planarization layer, and an intervention layer between the second bonding layer and the second planarization layer;

wherein the multi-layer film further comprises a second support layer covering both the first region and the second region, wherein a first interfacial bonding strength between the second support layer and the first bonding layer is substantially larger than a second interfacial bonding strength between the second support layer and the second bonding layer.

8. The multi-layer film of claim 7 , wherein the second bonding layer is irradiated by UV light before bonding with the second support layer.

9. The multi-layer film of claim 7 , further comprising a third support layer covering both the first region and the second region on a side of the first planarization layer and the second planarization layer opposite from the second support layer.

10. The multi-layer film of claim 9 , wherein at least one selected from the group consisting of the first support layer, the second support layer and the third support layer comprises polymer.

11. The multi-layer film of claim 7 , wherein the first interfacial bonding strength is at least six times larger than the second interfacial bonding strength.

12. The multi-layer film of claim 7 , further comprising a second barrier layer covering the first region and the second region on a side of the second support layer opposite from the first bonding layer and the second bonding layer.

13. A method of manufacturing a display panel, the display panel including a multi-layer film having a first region and a second region and a display layer on the multi-layer film, comprising:

forming an intervention film on a substrate;

forming a first bonding layer in the first region and a second bonding layer in the second region;

removing the intervention film in the first region and the substrate to form an intervention layer; and

forming a planarization film on the intervention layer, the planarization film comprising a first planarization layer in the first region and a second planarization layer in the second region;

wherein the first region comprises the first bonding layer and the first planarization layer directly contacted with each other; and

the second region comprises the second bonding layer, the second planarization layer, and the intervention layer between the second bonding layer and the second planarization layer.

14. The method of claim 13 , wherein forming the first bonding layer in the first region and the second bonding layer in the second region comprises:

forming a bonding film on the intervention film;

irradiating a side of the bonding film opposite from the intervention film in the second region only; and

forming a second support layer on the side of the bonding film opposite from the intervention film.

15. The method of claim 14 , wherein irradiating the side of the bonding film opposite from the intervention film in the second region only comprises irradiating the bonding film by UV light through a first mask, wherein a first interfacial bonding strength between the second support layer and the first bonding layer is larger than a second interfacial bonding strength between the second support layer and the second bonding layer.

16. The method of claim 13 , wherein the removing the intervention film in the first region and the substrate comprises:

irradiating the intervention film in the second region by a first laser light through a second mask to separate the intervention film and the substrate in the second region;

cutting the intervention film by a second laser light along an interface between the first region and the second region; and

removing the intervention film in the first region;

wherein the second laser light has a wavelength greater than the first laser light.

17. The method of claim 13 , wherein the intervention film has a first support film and a first barrier film.

18. The method of claim 14 , between the forming the second support layer on the bonding film and removing the intervention film in the first region and the substrate, further comprising:

forming the display layer on the second support layer.