Why Create a Halogen Free PCB?
Although halogen PCB play a vital role in the structure,they have a disadvantage that is hard to ignore toxicity. Yes, these purport are functional flame retardants and bactericides, but the cost is high.
Chlorine and bromine are the culprits here. Exposure to any of these chemicals may cause uncomfortable symptoms like nausea, coughing, skin irritation, and blurred view.
Why PCB Manufacturers Avoid Halogen in PCB Manufacturing?
However, a purport using a halogen element proceed dioxin when blowing.
For this reason,halogen-free has a long time been called for, but because the difficulty of proceed,many manufacturers have not fully suited it, especially for the goods with high component mounting density.
In a long time, brominated flame retardants have been took in the manufacture of PCB.
Halogen PCB VS Halogen Free PCB Price element
The price is higher than ordinary halogen-containing PCB. The cost difference is only from an economic point of vision.
However, proceed SMT patches are still facing a more critical challenge: PCB drilling is a big affected by the physical properties of the material, when the hardness of halogen free materials is used often.
Your Trusted Halogen Free PCB Supplier
Venture is your primary manufacturer of any type of PCB, especially Halogen free PCB. We are supplying high-quality Halogen free PCB in different parts of the world. Venture also known as the best supplier and dealer in China because of its great experience and best quality services. You can always trust Venture in terms of providing you the most satisfying Halogen free PCB that may suit every applicable component you have.
Venture Halogen free PCB is made up of electronics that consist of some specific materials that have the highest concentration of halogen. It has replaceable materials or lessen the uses of the board to form or create Halogen free PCB. We offer different Halogen free PCB in different designs for some substitute substances needed.
This Halogen free PCB is being created by Venture with specific limitations. The only halogens that are in Halogen free PCB are usually found in fluxes which are equally bonded so it won’t be detected. Ventures are always ready to answer more of your questions about our Halogen free PCB .
Your Leading Halogen Free PCB Supplier in China
Venture avail Halogen free PCB for the reason that being halogen free is important at a time of developing PCB. When creating Halogen free PCB, there are many combinations of elements that are applied for different purposes. Because Venture is using specific and environment friendly elements, most of our customers prefer to use Halogen free PCB.
Venture as your expert manufacturer especially of Halogen free PCB, provides flexible methods and using new materials for upgraded applicable components. Venture Halogen free PCB shows up at an amount of complication all along manufacturing and designing.
Venture Halogen free PCB essential less than 900 parts per million of chlorine including bromine and a sum of fewer than 500 ppm of Halogen materials. Even if these elements being used have negative effects, Venture manufactures and finds a way by using high-tech technology that our Halogen free PCB don’t need to use those hazardous chemicals.
Looking for a safe and secure Halogen free PCB? Check out the list of Venture products. Ventures always prioritize the safety of our customers purchasing our high-quality Halogen free PCB. Halogen free PCB is also applicable in any industry like mobile and automobile industry where Halogen free PCB is being used.
When you use Halogen free PCB, Venture assures you that it will have a low effect on our health. Venture is your trusted Halogen free PCB supplier for we create the said product with protected elements for the benefit of our customers. Venture is willing to talk to you by letting us know your required Halogen free PCB for your applicable components.
Halogen free PCB of Venture is beneficial in every industry it applied. You can experience satisfaction by using our high-quality Halogen free PCB. We are operating services with approachable sales staff anytime you want and anytime you inquire.
Feel free to contact or email us for more information about Venture Halogen free PCB!
Halogen Free PCB: The Ultimate FAQ Guide
Today, the world is transitioning to safe and environmentally friendly electronics – a reason why companies are adopting halogen free PCB.
This guide will take you through every aspect of halogen free PCB.
So, if you’re new to halogen free PCB, or you intent to invest in these printed circuit boards, read this guide.
- What Is Halogen Free PCB?
- Why Is The Use Of Halogens Restricted In PCB Fabrication?
- Are Halogen Free PCBs Environmentally Friendly?
- Are There Disadvantages Of Using Halogen Free PCBs?
- Why Use Halogen Free PCB?
- Which Elements Have Since Replaced Halogen In PBC Materials?
- Which Materials Are Suitable For Halogen Free PCB Fabrication?
- What Is The Performance Criteria Of Halogen Free PCB?
- Which Quality Standards Should Halogen Free PCBs Comply With?
- Does Halogen Free PCB Imply Printed Board Circuit Has Zero Halogen?
- Where Can You Use Halogen Free PCB?
- How Do You Test Halogen Free PCB?
- Which Factors Affect Cost Of Halogen Free PCB?
- How Do You Manufacture Halogen Free PCB?
- What Is A Halogen Free PCB Material?
- How Does Halogen PCB Compare To Halogen Free PCB?
- What Is The Role Of Halogen In PCB Material?
- Apart From RoHS Outlining Requirements For Halogen Free PCB;
- What Other Compound Does RoHS Restrict In PCBs?
- What Are The Effects Of PCBs With Halogen To Human Life And Environment?
- Are Halogen Free PCBs Flame Retardant?
What Is Halogen Free PCB?
This is printed circuit board that has no halogen in it.
This halogen elements are bromine, astatine, chlorine and fluorine.
PCB is halogen free when chlorine or bromide is less than 900 ppm and 1500 ppm less in halogen materials in total.
Copper-clad laminate halogen free makes free halogen PCB.
Halogen Free PCB
Why Is The Use Of Halogens Restricted In PCB Fabrication?
The halogens elements include fluorine, chlorine, bromine, iodide and astastatium.
These elements have their advantages but also have many disadvantages compared to the good.
Chlorine and bromine is used in most electronics because they protect components of electronics against flames.
The Advantages include;
- Protect components against flames.
- Coat wires.
- Sterilize things.
Halogen is banned because of the disadvantages outweighs the benefits of it.
The disadvantages include:
- Results in coughing
- Causes nausea
- Gives blurred vision
- Causes skin irritation
- It gives trouble in breathing
- Causes burning sensation in the eyes
- It reacts with hydrocarbons and forms extremely deadly carcinogen called dioxin
It is good to avoid PCBs containing unacceptable amount of chlorine or bromine.
Are Halogen Free PCBs Environmentally Friendly?
Yes, halogen free PCB are environmentally friendly because these boards are constructed with materials that are free of halogens.
Halogen free PCB
The significant benefits of halogen free PCB to the environment is that they don’t cause the same pollution.
This is unlike the traditional printed circuit board.
Are There Disadvantages Of Using Halogen Free PCBs?
Lower absorption rate of water in halogen free PCBs compared to that of traditional halogen flame –retarded materials.
Normally lower water absorption has causes problem in stability of material during the manufacturing process. This may compromise the performance of PCB material if not processes properly.
Why Use Halogen Free PCB?
Halogen free PCB are popular due to good mechanical features, quality appearance, color that is stable, and transparency.
Additionally, the halogen-free circuit boards are better as flame resistant panels.
Halogen free PCB is better in insulation and is widely used in power products, such as TV/displays, and electronics that need insulation.
Halogen free board is used in low coast choice for high- frequency application because of good high-frequency performance.
Halogen free PCB is widely applied in every market because of low disposal prices, and green regulation compliances.
Which Elements Have Since Replaced Halogen In PBC Materials?
Halogen free PCBs uses Phosphorus and phosphorus-nitrogen.
Phosphorus-containing resin can decompose by thermal decomposition to form a polyphosphoric acid.
It is high on hydration and forms carbonized film surface of polymer resin.
The insulating surface of the resin is in contact with the air and extinguishes fire achieving flame resistance effect.
This is because the polymer resin containing phosphorus-nitrogen compound generates non-combustible gas on combustion to assist the resin system in flame resistance.
Which Materials Are Suitable For Halogen Free PCB Fabrication?
Some of the main materials you can consider include:
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*other materials that are halogen free include:
What Is The Performance Criteria Of Halogen Free PCB?
You can gauge the performance criteria of halogen free PCB by evaluating the following key parameters:
Halogen free printed circuit board has higher amount of nitrogen and phosphorus compared to common board.
The monomer molecular weight and tg value increases.
The molecular mobility of halogen free printed circuit board is lower under heat, than that of epoxy convectional resin board.
Halogen free printed circuit board has relatively low coefficient of thermal expansion(CTE).
Halogen is substituted by phosphorus or nitrogen.
Polarity of molecular bond of epoxy resin is reduced thus improving insulation resistance and break down voltage.
-Low electrons of nitrogen and phosphorus in nitrogen- phosphorus oxygen-reducing resin, lowers the probability of hydrogen bonding with hydrogen atoms in water.
This is unlike that of halogen which affects the reliability to some extent.
Which Quality Standards Should Halogen Free PCBs Comply With?
Halogen free PCB
- IEC61249-2-21-Starndard is used to indicate halogen free printed circuit boards.
In order to meet IEC61249-2-21 standard, boards that are printed and their reinforcing matrices cannot contain more than a total of 1500 ppm of halogen.
Besides, this standard limits use of bromine and chlorine to not more than 900 ppm of either of both element
- JS709C covers all aspects of electrical products.
This standard defines halogen to be low in every material with an electronic product (excluding printed boards laminates).
They should contain less than 1000ppm by weight of bromine from flame retardants that is brominated.
Remember, PCB containing less than 100ppm by weight of chlorine from chlorinated retardants flames.
- J-STD-609B is cited with regard to low halogen compliance.
- The EU RoHs directive 2002/95/EC is the restriction of harmful substances that specifies maximum levels of lead in various devices that is electronic and electric.
Additionally, RoHs restricts the following;
- Cadmium (cd) <100ppm.
- Mercury (Hg) <100 ppm.
- Polybrominated diphenly Ethers (PBDE): <1000 PPM.
- Hexavalent chromium (Cr VI) :<1000 ppm.
- Polybrominated Biphenlys (PPB): <1000 PPM.
- Lead (Pb): <1000 ppm.
RoHS standard restricts use of lead in electrical and electronic products. This is alongside other harmful substances too.
*EUs and RoHS prohibits use of PBB and PBDE cause they are not halogen free and thus pose danger to human beings and environment.
Does Halogen Free PCB Imply Printed Board Circuit Has Zero Halogen?
As the definition of halogen free PCB describes – its essential to retain less than 900 parts per million of chlorine or bromine.
Also to have less than 1500 parts per million of halogen.
Meeting the standards of halogen free printed circuit board has to have some traces of halogens.
However, the threshold must not exceed acceptable levels. Through this, you will prevent harm while enhancing efficiency of the end electronic product.
Where Can You Use Halogen Free PCB?
Halogen free printed circuit board
Since they are halogen free, you can use them in virtually all industrial applications.
These boards are effective, reliable and dependable in virtually all electronic components.
Most common application include – consumer electronics, automobile, phones, displays, control systems, etc.
How Do You Test Halogen Free PCB?
There are many ways of testing halogen free PCBs:
Temperature Cycling Test
The purpose is to make use of the (coefficient of Thermal expansion) Mismatch effect between substances with varying thermal expansion.
The risk in quality of the product is identified through the long period of high/low temperature cycling.
This leads to through hole cracking. Consequently, you can determine if the product has problems.
This benefits multilayered products and HDI products highly.
This test identifies and improve the quality, strength, platting quality and process of laminating the board.
Non-dynamic test are number of cycles sets, selected in order to measure the resistance values.
Wet/Dry Thermal Shock Tests
This verifies potential problems on exposure to different temperature variations.
This enable you to identify possible problems due to frequent temperature alteration.
Some of these problems may include body damage, discoloration, and variation in resistance.
Test aim is to induce material failure of sample due to results in sudden changes in temperature (Thermal shocks).
There is two types of TSTs- Those with liquid chamber and those with gas chamber.
Electrochemical Migration Test.
It is important test after entering lead free process.
ECM test usually measures the variation of high resistances for identifying short-circuit risks between two isolated circuits.
PCB is used in this test is of comb design but actual product design is also tested here.
The use of this comb design PCB is very helpful.
That is, you use less number of samples.
The best part, it provides thorough observation of the product.
Normally, this information is helpful for new suppliers’ qualifications.
Copper Trace Tension Test And Solder Pad Bond Strength Test
*This is a test to confirm PCB semi-finished products after the press.
It benefits semi-finished products.
This is where there is stimulation of heat resistance.
This is stimulated by way of 228 degree Celsius solder that floats.
CTE And Tg Measurements.
Co-efficient of thermal expansion (cte) and Glass Transition Temperature (Tg) are basic items when it comes to halogen free substances.
Bending test– the purpose of bending test is to observe the risk taking quality of vias and the board material under bending condition.
Bending test is categorized into destructive and non-destructive.
You can select any of them depending on different requirements or assembly condition.
Potable products use bending test more so cycling bending.
This is for purpose of stimulating the fatigue in material when product is subjected to continuous bending.
PCB is tested with components assembled for observing solder joints that is being affected by the strain resulting from external force.
Problems that are typical are pad peeling, and pad crating is revealed through this test.
Mechanical Shock Test
This is for assembled products.
Under the impact in high G value, the deformation in the PCBA results in the creep of solder joint between the PCB and the component.
This causing frequent bond failure.
Which Factors Affect Cost Of Halogen Free PCB?
RoHS approved halogen free PCB
- Material choice; choice of material will affect the cost of halogen free PCB.
- Thermal reliability; the board has to work and perform well under the temperature exposed to perform duties asked to do.
Some boards require higher thermal rating material and this increases price.
- Temperature reliability
The material has to withstand different range of atmospheric condition within controlled setting without overheating.
- Heat Transfer
The board has to withstand high-intensity loads without transferring undue levels of heat to surrounding components.
- Signal Performance
Material has to facilitate electrical signals throughout uninterrupted on each operating cycle.
- Mechanical Properties
This requires to have sufficient physical composition to withstand a plausible range of physical stress.
Operations that involve higher frequencies require materials of higher grade.
- PCB Size
Size is determined by number of circuits required of the corresponding device.
The amount of space consumed by components on board affects the price.
The dimensions of your PCB design is the major determinor of overall price.
- Number Of Layers
Price is affected by the type of material used and the size of board.
Thick boards with numerous layers require considerably more work to manufacture.
So basically, you will pay more for multi-layer halogen free PCB than single layer halogen free PCB.
Some finishes boast higher grades and offer longer shelf life , thus adds overall cost production.
- Size Of Hole
It is determined by the number of holes required and the thickness of layers being drilled.
More holes more work – thereby, you will obviously pay more.
The size of the hole –small hole require special tools and skills and more time thus more expensive.
Depending on the quality of material whether supper strong and hard to drill impacts the price.
- Minimum Trace and Space
Boards makers enlarge trace width and add extra solder mask to the traces that might be prone to burn.
These step adds to the price of PCB production.
- Thickness Of PCB And Aspect Ratio
Thicker materials are costlier to laminate, procure and form into a printed circuit board. It is even challenging if the design itself is highly intricate.
- Custom Or Unique Specifications
If you require special features for your halogen free PCB, definitely you will pay more.
For instance, complex design will require special skill hence, higher cost.
Examples- contour edges, rounded edges – obviously this will cost more.
It is even high for those that require z axes routing.
Side plating – PCB design metal edges boosts EMC strength.
Solder mask clearance- extra clearance and thickness needed increases cost.
How Do You Manufacture Halogen Free PCB?
Basically, the process of manufacturing halogen free PCB involve:
- Designing the PCB
- Design review and engineering questions.
- Printing on PCB Design.
- Printing copper for interior layers
- Copper removal or etch the inner layers.
- Alignment of layers
- Automated optical inspection.
- Lamination of PCB layers.
- Drilling PCB where possible.
- Plating of PCB.
- Imaging of outer layer
- Etching of outer layer.
- Outer layer AOI
- Application of solder mask.
- Application of silkscreen.
- Finishing the PCB.
- Electrical Reliability test.
- Route out and profiling.
- Visual inspection and
- Quality check.
- Packaging and Delivery.
Note: Please note that you may alter these processes depending on the type of halogen free PCB you need.
PCB Manufacturing process
What Is A Halogen Free PCB Material?
Halogen free material is a material that contain chlorine or bromine that is less than 900 ppm and has 1500 ppm less in halogen materials.
How Does Halogen PCB Compare To Halogen Free PCB?
Halogen PCB have been used in electronic products to diminish the risk of fire-related injury.
But due to more bad effects than benefits to environment pollution, alongside harmful effects to humans – halogen free PCBs are popular.
Halogen free PCBs contain safe amount of halogen according to RoHS regulations. Hence they are safe.
Harmful halogen has been replaced by nitrogen and phosphorus in them.
What Is The Role Of Halogen In PCB Material?
Some components of halogens like chlorine and bromine have advantages in them that is used in low quantities.
But the negative effects that comes with it outweighs their good effects.
Advantages of chlorine.
- It is used to protect components against flames.
- It is used to coat wires.
Advantages of Bromine.
- It is used to sterilize things.
- It is used to protect electronic components against fire.
Apart From RoHS Outlining Requirements For Halogen Free PCB;
What Other Compound Does RoHS Restrict In PCBs?
Other restricted compounds are:
- Lead (pb)<1000 ppm
- Hexavalent chromium (Cr,VI)< 1000 ppm
- Mercury (Hg)<100 PPM
- Cadmium (Cd)<100 ppm
- Polybrominated diphenyl Ethers (PBDE);,1000 ppm
- Polybrominated biphenyls (PBB)<1000 ppm.
What Are The Effects Of PCBs With Halogen To Human Life And Environment?
Some of the effects include:
- Blurred vision
- Skin irritation
- Trouble breathing
- Burning sensation in eyes
- Reacts with hydrocarbon and forms deadly carcinogen called DioXIN.
- Pulmonary edema.
- Headaches and dizziness
For environment, it include pollution by dioxin to air.
This poses serious danger to human when inhaled it cause cancer to human.
Are Halogen Free PCBs Flame Retardant?
Yes, they are flame retardant.
In fact they can withstand high temperatures.
At Venture Electronics, we give you high performance halogen free PCBs, depending on your requirements.
Contact us today for all your halogen free PCBs.