公开(公告)号：US11479637B2

公开(公告)日：2022-10-25

申请号：US16342448

申请日：2017-10-03

Applicant: DAICEL CORPORATION

Inventor： Hiroto Miyake ,  Kiyoharu Tsutsumi ,  Ryosuke Ieki

IPC: C08G59/24 ,  C08J5/24 ,  C08G59/68 ,  C08G59/42 ,  C08G59/62 ,  C08G59/50 ,  C08K3/36 ,  C08K3/04 ,  H01L23/29 ,  H01L23/31

Abstract: Provided is a sheet-like prepreg that has both a low coefficient of linear thermal expansion and high flexibility and offers excellent anti-warpage performance and cracking resistance. The sheet-like prepreg according to the present invention includes a curable composition and a sheet-like porous support impregnated with the curable composition. The sheet-like porous support is made from a material having a coefficient of linear thermal expansion of 10 ppm/K or less. The sheet-like prepreg gives a cured product having a glass transition temperature of −60° C. to 100° C. The curable composition includes one or more curable compounds (A) and at least one of a curing agent (B) and a curing catalyst (C). The curable compounds (A) include an epoxide having a weight per epoxy equivalent of 140 to 3000 g/eq in an amount of 50 weight percent or more of the totality of the curable compounds (A).