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Printed Circuit Board Assembly & PCB Design Forum

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Bromine Free Circuit Boards

marys

#6173

Bromine Free Circuit Boards | 18 December, 2000

When reading about the design of high performance cicuits I have recently encountered references to bromine free circuit boards. What are bromine free circuit boards? When would one find them most useful and who supplies such boards?

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Charles Harper

#6174

Re: Bromine Free Circuit Boards | 18 December, 2000

Flame retardant epoxy-glass circuit boards are made using brominated epoxies,with the bromine atoms providing the flame retardancy.In a fire,these boards can give off toxic gases.Bromine free epoxies can be used,with other additives being used to provide flame retardancy.These are most used by consumers with flammability environmental concerns.Many Japanese consumers demand this.Some suppliers are Hitachi,Mitsui,Nelco,Polyclad.I recommend an article by Martin Valfridsson in the November 2000 issue of CircuiTree,or contact Martin at martin.valfridsson@era.ericsson.se

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