FR-4 bụ koodu nke ọkwa nke ihe na-eguzogide ire ọkụ, nke pụtara nkọwapụta ihe na ihe resin ga-enwe ike imenyụ ya n'onwe ya mgbe ọkụ gachara. Ọ bụghị aha ihe onwunwe, kama ọkwa ihe onwunwe. Ya mere, n'ozuzu PCB sekit mbadamba, E nwere ọtụtụ ụdị FR-4 ọkwa ihe eji, ma ọtụtụ n'ime ha bụ ihe mejupụtara ihe mere nke Tera-Function epoxy resin na filler na iko eriri.

FR-4 epoxy iko ákwà laminate, dị ka dị iche iche ọrụ, ụlọ ọrụ a na-akpọkarị: FR-4 Epoxy Glass mkpuchi osisi, epoxy osisi, brominated epoxy osisi, FR-4, Glass fiberboard, FR-4 mesikwuru osisi, FPC mesikwuru osisi, mgbanwe sekit osisi mesikwuru osisi, FR-4 epoxy osisi, ire ọkụ na-egbochi mkpuchi osisi- osisi, FR-4 iko osisi, FR-4 iko osisi, FR-4. epoxy iko akwa laminated osisi, sekit osisi mkpọpu mpe mpe akwa.

Aha FR4 sitere na sistemụ grading NEMA ebe 'FR' pụtara 'ọkụ retardant', dabara na ọkọlọtọ UL94V-0. Nhọrọ FR4 na-esote TG130. TG na-ezo aka na okpomọkụ iko mgbanwe mgbanwe - okpomọkụ nke ihe na-eme ka iko na-eme ka ọ dị nro ga-amalite imebi ma dị nro. Maka bọọdụ ọkọlọtọ Fusion uru a bụ 130C, nke zuru oke maka ọtụtụ ngwa. Pụrụ iche High TG ihe nwere ike idi okpomọkụ nke 170 - 180 ° C, dị ka anyị ihe 3250. The FR-5,G11 nwere ike idi okpomọkụ nke 155 ° C.

Ọtụtụ FR4 laminates na-enweta ọkụ ọkụ na-eguzogide ọdịnaya bromine ya, halogen na-adịghị emeghachi omume nke a na-ejikarị eme ihe n'ụlọ ọrụ maka ihe na-egbochi ọkụ ya. Nke a na-enye ihe FR4 uru doro anya dị ka ngwaahịa PCB ngwaahịa n'ihe gbasara nchekwa ọkụ mgbe ọ nọ n'ọhịa. Ọ bụkwa ntakịrị ihe na-emesi obi ike ma ọ bụrụ na nkà ịre ahịa gị erughị ọkwa.

Otú ọ dị, bromine bụ halogen nke bụ kemịkalụ na-egbu egbu nke a na-ewepụta na gburugburu ebe obibi mgbe a na-akpọ ya ọkụ. Ọbụna obere ego zuru ezu iji merụọ mmadụ ahụ́ ma ọ bụ ọbụna nwụọ. Iji belata ojiji nke ihe ndị dị ize ndụ na ngwaahịa anyị kwa ụbọchị, laminates FR4 na-enweghị halogen dị ngwa ngwa.

N'oge na-adịbeghị anya, anyị emepụtala mpempe akwụkwọ na-acha ọcha na oji halogen-free FR4 epoxy glassfiber laminate sheets, ugbu a, a na-eji ya dị ka FPC kwadoro osisi na iphone, ikpo ọkụ, na ihe ndị ọzọ.