Introduction Of Lead Halogen Free Pcb

By Author: May
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We have mastered the technology of manufacturing Lead Halogen Free PCB so that they do not pose a threat to the continuity of human and natural life.The European Union RoHS Directive 2002 / 95 / EC, also known as RoHS or lead free, is a hazardous substances restriction regulation, which specifies the maximum content of lead in various electrical and electronic equipment. But in fact, ROHS limits the amount of lead in the world.

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It also limits the following harmful substances:
Lead (PB): < 1000 ppm
Mercury (Hg): < 100 ppm
Cadmium (CD): < 100 ppm
Hexavalent chromium: (CR VI) < 1000 ppm
Polybrominated biphenyls (PBB): < 1000 ppm
Polybrominated diphenyl ether (PBDE): < 1000 ppm
The RoHS directive restricts not only the use of lead in electrical and electronic products, but also other hazardous substances.

With the increasing demand of global environmental protection, the use of other harmful substances is restricted. For example, due to the use of many halogen-containing chemicals in the PCB manufacturing ...
... process, the problem of halogen based compounds has emerged in the PCB industry.

What is halogen
Halogen is Greek, meaning “salt”. Halogens include five chemicals, such as fluorine, chlorine, bromine, iodine and a. In the electronic industry, bromine and chlorine are the focus of attention.

Bromine and chloride compounds have been widely used in electronic waste, plastic products and PVC. Indeed, halogens will not harm human beings and the environment when they are used in electronic products and equipment. However, there are problems in the safe disposal at the end of service life by incineration.

When burning harmful substances, it is easy to produce harmful substances, such as dioxin and hydrochloric acid gas (HCl). Through bioaccumulation, they are always harmful to human health and the environment.

Printed circuit boards, solder resist, IC mouldings, connectors and other common electronic products contain halogenated compounds, especially PBB and PBDE, which are the most dangerous toxins. This is why the EU ROHS regulations prohibit the use of PBB and PBDE.

Looking forward to the future, the electronic industry is gradually aware of the need to ban the use of other halogenated compounds. The production of halogen-free products has become the latest trend of environmental protection.

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