We are Your Leading Halogen-free Material Manufacturer in China
In this sector for the past twenty years, JarnisTech has been a manufacturer of halogen-free material. We have a reputation for professionalism and trust in many different ways, including making, designing, assembly, and more. JarnisTech has handled a variety of halogen-free materials processes. Send PCB files along with BOM to us. We will respond quickly to your PCB or assembly project.
What is Halogen-free PCB?
It is common to see or hear about PCBs with Halogen-free components in the subject of building PCBs today. Specifically, a Halogen-Free PCB denotes a printed circuit board that actively avoids incorporating Halogen elements. These components include Chlorine, Bromine, fluorine Iodine, Astatine and iodine. Substances known for their effects on human health. To meet the criteria of being ‘Halogen Free’ a PCB must limit its Bromine and Chlorine content to than 900 parts, per million with overall halogen levels staying below 1500 parts per million.
In accordance with JPCA (Japan Circuit Association)-ES-01-2003 standard: The copper-clad laminations with bromine (Br), chlorine (CL) in quantities less than 0.09 per cent weigh (weight-ratio), are described as halogen-free lamination of copper-clad (BR + CL total = 0.15 [1500PPM]). A PCB that is halogen free is created with the aid of a halogen-free laminate of copper-clad.
Since their introduction, this printed circuit boards evolved into an increasingly popular choice for substations, power plants, labs, distribution rooms and other places. Halogen-free PCBs cost more over conventional PCBs because of materials designs, cost of materials, and the complexity that are involved. Therefore, you should procure them from reputable manufacturers such as JarnisTech. They offer leaded and RoHS-compliant and Halogen-free PCBs that can be used in medical and industrial electronics, consumer electronic devices, and municipal applications. Our all PCBs are manufactured in the well-equipped factory of the company located in ShenZhen and offers high-end PCB manufacturing.
Halogen Free PCB: How It Works
PCBs that are free of Halogen have become very sought-after in the electronics sector. This PCB is a great choice for mechanical and thermal properties.The perfors of the PCB is therefore important to understand.
Absorption of Water:
As halogen free circuits is less to absorb water than conventional circuit boards. Therefore, the nitrogen-phosphorus resin features low electrons of nitrogen and phosphorus. Due to this, There is less possibility of hydrogen bonding with hydrogen atoms than with halogens..
A higher absorption of moisture could cause negative effects on electronic. This can cause conductive anodic filament and popcorning.
Thermal Stability:
A halogen-free PCB has higher levels of phosphorus and nitrogen than a typical board, so its value and molecular weight are increased. The molecular mobility on halogen free boards is much lower than the standard board. So, halogen free circuit boards have lower CTE.
Insulation:
Rather than using halogen, this PCB features nitrogen and phosphorus. These elements improve the break-down voltage and insulation resistance. In halogen free boards, the polarity of the molecular bond of the resin decreases.
Why were Halogen Free PCBs Created?
Halogens can play an important role in PCB manufacturing, but they come with one disadvantage that is difficult to ignore: their the toxicity. Yes, They are effective flame retardants as well as sterilization chemicals, but they come at a high cost.
Bromine and chlorine are the primary causes here. Inhaling either of these chemicals may cause unpleasant symptoms such as nausea as well as irritation of the skin, coughing and blurry vision.
A risky exposure won’t happen through the handling of a PCB containing Halogens. However, These adverse side effects may occur if a PCB catches on fire or emits fumes.
If components that contain chlorine be mixed with hydrocarbons, then it results in dioxin which is a deadly carcinogen. Unfortunately, certain countries tend to practice poor disposal due to limited resources to recycle PCBs safely.
This is why incorrect removal of PCBs with high levels of chlorine are harmful to the environment. In the event of burning these devices in order to remove them — and this is what happens–may release dioxin into the atmosphere.
The Halogen-free PCB Manufacturing Process
The essential steps in PCB production that is Halogen-free are the same as those for regular PCB manufacturing and comprise some of the steps below:
● Blueprinting the PCB.
● Addressing engineering inquiries and scrutinizing designs.
● The fabrication phase, which includes PCB design.
● Copper layer application for the creation of the Interior Layer.
● Subsequent etching of the inner or core layers to eliminate superfluous copper.
● Calibration of individual layers.
● Execution of automated optical verifications.
● Lamination process of the PCB Layers.
● Implementing drilling procedures.
● Plating of the PCB.
● Exterior layer etching.
● Conducting visual checks on the exterior layer utilizing AOI technology.
● Coat application of solder mask for component security on the board.
● Incorporation of silk screen designs for identification.
● PCB assembly.
● Execution of electrical dependability tests to confirm operational functionality.
● Route Out and Profiling.
● Execution of quality inspections and visual assessments.
● The dispatching of finalized products.
But, the process is different in some steps, for instance:
Since the Halogen-free FR4 materials have greater mechanical strength than regular FR4 and CEM-3 materials, you will require more drilling power to make holes into circuit boards during the drilling phase.
Halogen-free FR4 materials are less resistant to alkali than other FR4 materials. Therefore, the time required to soak in an alkaline stripping solution is reduced in the process of etching.
In general, there is no lead in PCBs that are halogen-free. Lead PCB assemblies require an average of 260 degrees Celsius for reflow soldering. This is 20 degrees more than lead PCB assemblies.
Halogen Free PCBs as Well as Their Benefits
A halogen-free PCB can be described as a kind of PCB that is made of copper-clad laminates that have bromine (Br) and chlorine (Cl) levels less than 0.09 weight ratio, according to the IPC/JEDEC JSTD-709 standard.
Halogen-free PCBs, given their myriad advantages over traditional PCBs, have witnessed a surge in adoption across multiple sectors. Herein below lie a few merits attributed to the utilization of halogen-free PCBs.
● Halogen compounds are substituted with Nitrogen (N) or Phosphorous (P). This modification reduces the molecular bond’s polarity of the epoxy which improves the breakdown power and the insulation power of PCB. This is a factor in its growing use in television/displays as well as power equipment.
● Phosphorus as well as nitrogen levels on PCBs that are halogen-free is greater than conventional printed circuit boards. This raises the Tg Value as well as its molecular weight of monomers, which aids in its thermal stability.
● Halogen-free boards have superior insulation properties compared to regular PCBs. They are therefore used in many electronic products, including televisions, display screens, and other electronic devices that require the highest insulation qualities.
● Halogen-free PCBs have a lower coefficient of expansion compared to regular PCBs. This is mostly due to the lower molecular mobility of the halogen molecules.
● There are high costs for manufacturing related to electronic devices designed to run high-frequency tasks. This is why halogen-free PCBs can be beneficial. While these PCBs cost more over normal FR4 PCBs, if the long-term efficiency of their performance comes into consideration, the cost could make up for. Manufacturers can also reduce their production costs by incorporating PCBs that are halogen-free in applications that are frequently operated at high frequency.
● Halogen-free printed circuit boards don’t release toxic byproducts or harmful substances when they are disposed of. This minimizes the environmental impact of their products and also confirms the green protection standards.
Green regulations are in compliance and the low cost of disposal ensure that these boards are applicable to all markets.
Importance of Halogen-free PCB Material
The mobile and telecommunication industries demand the use of high speed information transmission. If a signal is transmitted at a high rate in a circuit board the integrity of the signal is a problem. Materials with the lowest Df or Dk are suitable for PCBs with high frequencies.
Halogen-free is an additional prerequisite for boards that communicate. To make laminates, you can use non-halogen materials. They can be costly. Therefore, halogen-free PCB materials with a low DK/Df will be able to meet this requirement. Many electronic industries are now making use of halogen-free meterials in electronic devices.
Halogen-free PCB materials contain no halogens.They meet the requirements that regulate the quantity of halogens contained in materials. Halogen-free PCB materials are found in halogen-free PCBs. They have a low transmission losses. This contributes to the speedier transmission of information.
Many PCB manufacturers produce materials that are halogen free and prepregs. They have a variety of physical, electrical, as well as thermal characteristics. A PCB material that is free of the halogen element chlorine or bromine is non-halogen.
For a long time, many companies have employed brominated FRs in electronic devices. But,many companies now promoting halogen-free PCBs. These boards are halogen-free and have greater Td temperatures and longer T-288 times. This makes it easier to endure more reflow cycles as well as reflow temperatures.
EMC and Panasonic are two excellent examples of halogen free PCB materials. It is very ideal to produce halogen-free boards using these two materials. But, their properties differ. Below are the most common high-free PCB materials that are available:
● Panasonic Meg2 (R-1577/R-1570).
● NAN YA NPG-170N.
● Panasonic R-1566W/R-1551W.
● EMC EM-370(D).
● NAN YA NPG-150N.
Applications of PCBs Halogen-free
Halogen-free PCBs can be utilized in any application or industry that requires them to make electronic including industrial automation, consumer electronics, and all of them.
Despite the evident dissimilarities in specifications between halogen-free PCBs and PCBs comprising chemicals like chlorine or bromine, these boards remain wholly competent and are apt for a majority of applications.
PCBs constructed with halogen-free compounds are utilized in the subsequent applications:
● Transportation applications.
● Wireless and mobile devices.
● High-end computing.
● Servers.
● Consumer electronic devices.
Halogen-free Vs.halogen-containing Materials: Cost
The cost of material that is halogen free is significantly higher in comparison to materials that contain halogens.
The cost difference is reflected from a financial perspective.
For instance, in the majority of instances, the halogen-free materials utilized for the fabrication of circuit boards printed on are extremely tough, which makes it difficult to penetrate any printed circuit board.
The properties that are physical of Halogen-free material are a reflection of the life span that the circuit boards can last. In the majority of cases you’ll notice that the lifespan decreases by 25% because of the toughness.
So, when you sell an halogen-free circuit boards the cost is expensive.
Furthermore the halogen-free printed circuit boards cost a lot because of the costs and the process that are involved in their fabrication.
In Conclusion
The escalating demand for eco-friendly PCBs has catapulted the preference for halogen-free PCB laminate materials. Numerous corporations have transitioned to halogen-free PCBs in a bid to diminish their environmental impact and moderate the harmful effects of bromine and chlorine. Consequently, these PCBs are not only benefiting the environment, but they also exhibit considerable thermal resilience and low dielectric constants.
The paramount challenge in fabricating these PCBs lies in the notion that certain detection tests for halogens do not guarantee absolute accuracy. Thus, it becomes essential to conduct comprehensive research and engage with manufacturers prior to opting for halogen-free PCBs, ensuring the achievement of optimal results.
