Release film and hole inspection method using the same
A release film includes: a first release film; and a second release film below the first release film, wherein the second release film comprises: a first sub release film below the first release film; and a second sub release film below the first sub release film and comprising a first portion and a second portion around the first portion, wherein the first portion is attached to and detached from the first sub release film.
1. A release film comprising:
a first release film; and
a second release film below the first release film,
wherein the second release film comprises:
a first sub release film below the first release film; and
a second sub release film below the first sub release film and comprising a first portion and a second portion around the first portion at orthogonal sides of the first portion,
wherein the first portion is attached to and detached from the first sub release film, and
wherein the orthogonal sides of the first portion surround a hole in a plan view.
2. The release film of claim 1 , wherein the second sub release film further comprises a handle extending from the first portion.
3. The release film of claim 2 , wherein the handle protrudes outside the first sub release film.
4. The release film of claim 2 , wherein the first portion is configured to be detached from the first sub release film by using the handle.
5. The release film of claim 2 , further comprising a silicon adhesive between the first sub release film and the second sub release film.
6. The release film of claim 1 , wherein the first portion is separated from the second portion.
7. The release film of claim 1 , wherein the second release film further comprises:
a first protrusion protruding outside a first side of a support, which are opposite to each other in a first direction; and
a second protrusion protruding outside a second side of the support.
8. The release film of claim 7 , wherein a first cutoff part is defined in the first protrusion.
9. The release film of claim 8 , wherein the first cutoff part extends in a second direction crossing the first direction and is defined between both sides of the first protrusion, which are opposite to each other in the second direction.
10. The release film of claim 9 , wherein a second cutoff part is defined in the second protrusion.
11. The release film of claim 10 , wherein the second cutoff part extends in the second direction and is defined between both sides of the second protrusion, which are opposite to each other in the second direction.
12. The release film of claim 10 , wherein a plurality of transfer parts configured to transfer the first and second release films adsorb a portion of the first protrusion outside the first cutoff part and a portion of the second protrusion outside the second cutoff part.
13. The release film of claim 1 , further comprising a third release film below the first release film,
wherein the third release film is adjacent to the second release film and does not overlap the second release film in a plan view.
14. The release film of claim 1 , wherein the first release film comprises:
a base film; and
an adhesive layer on a bottom surface of the base film,
wherein the adhesive layer comprises a urethane adhesive.
15. The release film of claim 14 , wherein the adhesive layer has a thickness of 7 micrometers to 10 micrometers.
16. The release film of claim 14 , wherein the adhesive layer has an adhesive force of 8 gf to 12 gf.