Isola IS420

IS420 is a high performance 170C glass transition (Tg) system for multilayer Printed Wiring Board (PWB) applications where maximum thermal performance and reliability are required. IS420 laminate and prepreg products are manufactured with a unique high performance multifunctional epoxy resin, reinforced with electrical grade (E-glas) glass fabric. The system provides improved thermal performance and low expansion rates in comparison to traditional FR-4 while retaining FR-4 processability. In addition to this superior thermal performance, the mechanical, chemical and moisture resistance properties all equal or exceed the performance of traditional FR-4 materials. The IA420 system is also laser fluoescing and UV blocking for maximum compatibility with Automated Optical Inspection (AOI) systems, optical positioning systems and photoimagable solder mask imaging.


  • High thermal performance – Tg:180C (DSC), Td:340C (TGA@5% wt loss), Low CTE for reliability
  • T260: 60 minutes
  • T288: >15 minutes
  • RoHS Compliant
  • UV Blocking and AOI Fluoescence
  • Superior Processing – Closest to conventional FR-4 processing of all high speed materials
  • Core Material Standard Availability – Thickness 0.05mm to 2.4mm, Available in full size sheet or panel form
  • Prepreg Standard Availability – Roll or panel form, Tooling of prepreg panels available
  • Copper Foil Type Availability – Standard HTE Grade 3, RTF (Reverse Treat Foil)
  • Copper weights – 1/2, 1 and 2 oz (18, 35 and 70 micron) available, Heavier coper available upon request, Thinner copper foil available upon request
  • Glass Fabric Availability – Standard E-glass, Square weave glass fabric available
  • Industry Approvals – IPC-4101C/98 /99 /101, UL- File Number E41625, Qualified to UL’s MCIL Program