公开(公告)号：US20170121570A1

公开(公告)日：2017-05-04

申请号：US15318479

申请日：2014-06-18

Applicant: LINTEC CORPORATION

Inventor： Naoki TAYA ,  Yuki NITO ,  Yusuke MIYATAKE

IPC: C09J7/02 ,  B32B7/12 ,  H01L21/683 ,  B32B27/06

CPC classification number: B32B27/06 ,  B32B7/02 ,  B32B7/12 ,  B32B27/08 ,  B32B27/281 ,  B32B27/302 ,  B32B27/304 ,  B32B27/306 ,  B32B27/308 ,  B32B27/32 ,  B32B27/327 ,  B32B27/36 ,  B32B27/365 ,  B32B27/40 ,  B32B2250/02 ,  B32B2250/03 ,  B32B2250/04 ,  B32B2250/246 ,  B32B2255/10 ,  B32B2255/26 ,  B32B2270/00 ,  B32B2307/54 ,  B32B2307/58 ,  B32B2457/14 ,  C08L23/0869 ,  C09J7/29 ,  C09J2201/122 ,  C09J2201/162 ,  C09J2201/606 ,  C09J2201/622 ,  C09J2203/326 ,  C09J2205/114 ,  C09J2421/006 ,  C09J2423/006 ,  C09J2423/046 ,  C09J2423/106 ,  C09J2429/006 ,  C09J2431/006 ,  C09J2433/00 ,  C09J2433/006 ,  H01L21/6836 ,  H01L2221/68327 ,  C08L23/12

Abstract: 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%.

公开(公告)号：US20170121569A1

公开(公告)日：2017-05-04

申请号：US15318383

申请日：2014-06-18

Applicant: LINTEC CORPORATION

Inventor： Naoki TAYA ,  Yuki NITO ,  Yusuke MIYATAKE

IPC: C09J7/02 ,  B32B7/12 ,  H01L21/683 ,  B32B27/06

CPC classification number: H01L21/6836 ,  B32B7/12 ,  B32B27/06 ,  B32B27/308 ,  B32B27/32 ,  B32B2307/54 ,  C08L23/0869 ,  C09J7/29 ,  C09J2201/122 ,  C09J2201/162 ,  C09J2201/606 ,  C09J2201/622 ,  C09J2203/326 ,  C09J2205/114 ,  C09J2421/006 ,  C09J2423/006 ,  C09J2423/046 ,  C09J2423/106 ,  C09J2429/006 ,  C09J2431/006 ,  C09J2433/00 ,  C09J2433/006 ,  H01L21/6835 ,  H01L2221/68327 ,  C08L23/12

Abstract: A base film for dicing sheets that is used in a dicing sheet comprising the base film and a pressure sensitive adhesive layer laminated on one surface of the base film. 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%, 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 for dicing sheets is 25% to 80%.