7409190010
- Copper plates, sheets and strip, of a thickness exceeding 0,15 mm
- Of refined copper
- Other
- Plates or sheets: - with at least one layer of woven glass fibre, impregnated with a fire- retardant artificial or synthetic resin with a glass transition temperature (Tg) of more than 130 °C as measured according to IPC-TM-650, method 2.4.25, - coated on one or both sides with a copper film with a thickness of not more than 3,2 mm, and containing at least one of the following: - poly(tetrafluoroethylene) (CAS RN 9002-84-0) - poly(oxy-(2,6-dimethyl)-1,4-phenylene) (CAS RN 25134-01-4) - epoxy resin having a thermal expansion of not more than 10 ppm in length and width and not more than 25 ppm in height for use in the manufacture of circuit boards