| 发明名称 |
BASE FILM FOR DICING SHEETS AND DICING SHEET |
| 摘要 |
A base film for dicing sheets includes the base film and a pressure sensitive adhesive layer laminated on one surface of the base film. The base film includes a first resin layer that is in contact with the pressure sensitive adhesive layer of the dicing sheet and a second resin layer that comes into contact with the first resin layer when the base film is wound up. The second resin layer has a crystallinity of 28% to 45% The ratio of a tensile elastic modulus of the first resin layer to a tensile elastic modulus of the second resin layer is 1.2 to 3.0. The ratio of a thickness of the first resin layer to a thickness of the base film is 20% to 60%. |
| 申请公布号 |
US2017121570(A1) |
申请公布日期 |
2017.05.04 |
| 申请号 |
US201415318479 |
申请日期 |
2014.06.18 |
| 申请人 |
LINTEC CORPORATION |
发明人 |
TAYA Naoki;NITO Yuki;MIYATAKE Yusuke |
| 分类号 |
C09J7/02;B32B7/12;H01L21/683;B32B27/06 |
主分类号 |
C09J7/02 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A base film for dicing sheets, the base film being used in a dicing sheet comprising the base film and a pressure sensitive adhesive layer laminated on one surface of the base film, wherein
the base film comprises at least a first resin layer that is in contact with the pressure sensitive adhesive layer of the dicing sheet and a second resin layer that comes into contact with the first resin layer when the base film for dicing sheets is wound up, the second resin layer has a crystallinity of 28% to 45%, a ratio of a tensile elastic modulus of the first resin layer to a tensile elastic modulus of the second resin layer is 1.2 to 3.0, and a ratio of a thickness of the first resin layer to a thickness of the base film for dicing sheets is 20% to 60%. |
| 地址 |
Tokyo JP |
