US 12,247,147 B2
Thermosetting adhesive film and coverlay film comprising same
Jin Man An, Sejong (KR)
Assigned to HANWHA E-SSENTIAL CORPORATION, Pyeongtaek-si (KR)
Appl. No. 18/006,858
Filed by Hanwha e-ssential Corporation, Pyeongtaek-si (KR)
PCT Filed Jan. 25, 2022, PCT No. PCT/KR2022/001291
§ 371(c)(1), (2) Date Jan. 25, 2023,
PCT Pub. No. WO2022/164171, PCT Pub. Date Aug. 4, 2022.
Claims priority of application No. 10-2021-0010952 (KR), filed on Jan. 26, 2021; and application No. 10-2021-0180810 (KR), filed on Jan. 26, 2021.
Prior Publication US 2023/0265316 A1, Aug. 24, 2023
Int. Cl. C09J 7/35 (2018.01); C09J 11/04 (2006.01); C09J 11/06 (2006.01)
CPC C09J 7/35 (2018.01) [C09J 11/04 (2013.01); C09J 11/06 (2013.01); C09J 2301/304 (2020.08); C09J 2301/312 (2020.08); C09J 2433/00 (2013.01); C09J 2463/00 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A thermosetting adhesive film, comprising:
an epoxy resin which is solid at a temperature of 15° C. to 28° C., a thermosetting acrylic rubber which is solid at a temperature of 15° C. to 28° C. and a phosphorus-based flame retardant,
wherein the thermosetting acrylic rubber comprises a hydroxy group and a carboxyl group as functional groups and has a weight average molecular weight (Mw) of 400,000 to 1,500,000 and a glass transition temperature (Tg) of −10° C. to 15° C.,
wherein the thermosetting adhesive film satisfies all of Conditions (1) to (3) and (5):
A>100 MΩ  (1)
B1≤3.3,B2≤3.1  (2)
C≥0.7 kgf/cm, and  (3)
65° C.≤E≤85° C.,  (5)
wherein in Condition (1) above, A represents the insulation resistance measured for 500 to 1,000 hours under the conditions of a temperature of 85° C., a relative humidity of 85% and a DC voltage of 50V according to the IPC-TM 650 test standard,
wherein in Condition (2) above, B1 represents the dielectric constant at 1 GHz, and B2 represents the dielectric constant at 10 GHz, and
wherein in Condition (3) above, C represents the peel strength measured at the time of peeling under the conditions of a speed of 50 mm/min and a peeling direction of 90°, and
wherein in Condition (5) above, E represents the glass transition temperature (Tg).