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

Foil material STFU EM-4 belongs to FR-4 class according to ANSI classification and is intended for manufacturing of single-sided, double-sided and multilayer printed circuit boards. The insulating base of the foiled material corresponds to the conventional designation FV-EP-GC-CU according to GOST 26246.5 and GOST 26246.11. The material is identical to FR-4 according to IPC 4101E/21 with glass transition temperature of the insulating base not less than 130 ºC according to DSC method.
The maximum permissible operating temperature is from minus 60 ºC to plus 120 ºC. The material is resistant to UV radiation.
Example of conventional designation of foil foil material of double-sided mark STFU EM-4 (D - double-sided or O - single-sided) with nominal value of insulation layer thickness 0,15 mm, copper foil thickness 35 microns:
STFU-D-0,15-35-EM-4 TU 22.21.42-015-96330920-2019

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 foiled material eliminates the thickness of the...