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4L Halogen Free PCB

4L Halogen Free PCB

4L halogen free PCB 1.Product describe Specification Application: smart home control board. Layers:4 Special process: impedance control Surface treatment: LF HASL. Material: halogen free FR4 Outer line width/line distance: 3.5/3.5mil. Inner line width/line distance: 3.5/3mil. Thickness: 0.8 mm...

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4L halogen free PCB
1.Product describe


Layer: 4
Board Thickness: 2.0 mm
Surface treatment: immersion gold.
Material: halogen free FR4  .
Min line width/line distance:8/8mil
Min hole:0.2mm
Copper weight: 70μM all layer

Features-Our products advantage  
1)Over 10 years experience manufacturer in pcb prototyping making and pcb field.
2)Big scale of producing makes sure that your purchase cost is lower.
3)Advanced production technology guarantees reliable quality and long life span.
4)Design and produce almost any PCB as your requirement.
5)100% test for all products

2.Company information
Uniwell circuits co., lTD. found in 2007 and is located in Shenzhen.
We have abundant financial resources and advanced equipment, including Automatic electroplating production lines, Automatic Horizontal Lines and Lead-Free HAL lines. 

As a professional PCB manufacturer, we have wonderful teams which focus on product development & design, quality control & inspection and company management. In order to supply the best products and services, we have set up a modern quality management system which is in strict accordance with international standards. Besides, because of large overseas markets, our products have passed UL, ISO9001 and IS014001 certifications. If you have any new idea or concept for the products, please contact us. We are looking forward to establish long term cooperation with you. 


3.Packaging & delivery
Packing detail: Vacuum packing with carton box 




4.What is the halogen-free printed circuit board?
In general as the term implies halogen-free means the product material does not contain any compounds derived from these elements. Many persons in the electrical and electronic industry would give a definition of halogen-free similar to what the IPC organization (known as the Association Connecting Electronics Industries) provided in a recent paper, Electrical and electronic products may be considered halogen-free if they are assembled without the intentional use of these elements in the raw materials and these elements are not intentionally present in the end product. 

During the development of printed circuit boards, there are many compounds and elements that are utilized for a variety of purposes. During the early days of PCB development, many toxic compounds were used as either a cost-saving aspect of manufacturing or because of the specific, helpful nature of the element. As humanity develops an increased understanding of the threats that past materials present to life in today’s world, manufacturers are changing methods and finding new materials that don’t pose a threat to individuals working with such creations. 

Common compounds that are used in PCB developments belong to the family of Halogen elements. Although the composition themselves provide certain benefits to the development of electronics, they are harmful to human life in one way or another. 

These elements are:
– Flourine
– Chlorine
– Bromine
– Iodine
– Astatine 

While there is still debate on the toxicity of halogens within PCB development, there are two primary elements that constitute the general consensus of a halogen-free circuit board. These two are chlorine and bromine. Each provides a specific benefit to the overall safety and functionality of electronics but pose a threat to the continuity of life for humans and nature. 

Halogen-free PCB advantages:
Halogen-Free PCB properties that are of concern to the assembler are as good or better than comparable halogenated boards. By comparing data sheets from a number of raw PCB material suppliers, it is easy to see that the halogen-free PCB generally have lower CTE. They have longer T-260 and T-288 times and a higher Td temperature. These all mean that the board will be better suited for multiple reflow processes and will be able to withstand higher reflow temperatures in PCBA.

Halogen-Free PCB: There is increasing demand for environmentally friendly PCB electronic products. Halogenated compounds have been targeted for reduction and eventual elimination. As such, Halogen-Free PCBs are becoming more and more popular because they are constructed of materials that are free of halogen. In addition ,The dielectric constant, dissipation factor and moisture diffusivity of PCB materials that are described as Halogen-Free PCB are different from those employed in PCBs industry.

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