ELECTRICAL INSULATING FOIL MATERIAL OF STANDARDISED FLAMMABILITY FOR PRINTED CIRCUIT BOARDS ON THE BASIS OF GLASS FABRIC IMPREGN

Steklotekstolit foiled STF EM-4 of quality category "VP" according to GOST RV 5999-001 of normalised flammability (class 0 according to GOST 26246) is intended for manufacturing of printed circuit boards of 4-th and higher accuracy classes according to GOST RV 5998-002 and GOST R 53429, used for production of military and dual-use products. Glass-textolite is identical to FR-4 according to IPC 4101E/21 with glass transition temperature of insulating base 135±5ºC according to DSC method. The material is resistant to UV radiation. The maximum permissible operating temperature is from minus 60 ºC to plus 120 ºC.
Example of conventional designation of glass-textolite foiled double-sided STF EM-4 with nominal value of insulation layer thickness 0,15 mm, copper foil thickness 35 microns: ????-0,15-35-??-4 ??22.21.42-013-96330920-2019

These products are categorised under OCPD2 codes 26.11; 26.12; 22.21.
These products are categorised under EKPS 5970; 5998; Group 93.


The sheet thickness of the foil material excludes the thickness of the copper foil. Standard...