Requirement
Halogen-Free Products
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What is halogen?
Halogens are the elements in 17th group of periodic table, consisting Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I) and Astatine (At). Halogens generally used and concerned is Fluorine, Chlorine, Bromine and Iodine.
What is halogen-free?
IPC is an industrial association which establishes various standards regarding electronics manufacturing. In its latest flux standard J-ATD-004B, they stipulated to measure all halides and defined low-halogen as Cl+Br<1000ppm. Japan Electronics Information Technology Association (JEITA) defines halogen-free as content of F, Cl, Br and I to be less than 1000ppm., respectively. KOKI refer to a product without any intentional halogen addition as “halogen-free.”
Need for halogen-free soldering materials
Electronic materials have long history of containing halogen compounds as fire-retardant. However, materials which contain halogen compounds are concerned with generating dioxin when incompletely combusted. Consequently, reduction of halogen compounds as electronic materials in general is required.
Issues with halogen-free soldering materials
There are several “halogen-free” standards set by different organizations and a manufacturer could also use its own halogen-free definition or wording. Therefore, it is important to make sure which halogen-free standard to comply to.
KOKI’s definition of “halogen-free”
“Halogen-free”
No intentional addition of halogen elements (Cl, Br, F and I)
“Halogen-free (Cl+Br<1500ppm)”
Total content of Cl and Br is less than 1500ppm, KOKI’s own standard up to 2020.
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