What are the Characteristics of Halogen-free PCB?

      According to JPCA-ES-01-2003 standard: Copper clad laminates with chlorine (C1) and bromine (Br) contents less than 0.09% Wt (weight ratio) respectively (at the same time, the total amount of CI+Br ≤ 0.15% [1500PPM]) are defined as halogen-free copper clad laminates. So what are the characteristics of halogen-free PCB?

 

1. Environmental Protection

Halogen-free PCB board realizes environmental protection and non-toxicity of PCB by replacing or replacing harmful elements.

 

 

2. Flame Retardant

Most of the halogen-free materials are mainly phosphorus-based and phosphorus-nitrogen-based. The polymer resin containing phosphorus and nitrogen compounds will form a carbonized film when it is burned, which can isolate the burning surface of the resin from contact with the air, so that the fire can be extinguished and the flame retardant effect can be achieved.

 

 

3. Good Insulation

Halogen-free PCB uses phosphorus or nitrogen instead of halogen atoms, which reduces the polarity of the molecular bond segment of epoxy resin to a certain extent, thereby improving insulation resistance and breakdown resistance.

 

 

4. Low Water Absorption

Halogen-free base materials are less likely to form hydrogen bonds than halogen materials. For the base material, low water absorption has a certain influence on improving the reliability and stability of the base material.

 

 

5. Small Coefficient of Thermal Expansion

When the halogen-free sheet is heated, the mobility of nitrogen and phosphorus molecules is lower than that of conventional epoxy resins, so its thermal expansion coefficient is relatively small.

 

 

To sum up, the demand for halogen-free PCBs is definitely increasing, it has more advantages, and it can also meet the quality requirements of PCB in other performances. HoYoGo, as an international, professional and reliable PCB manufacturer, we can provide this service to our customers, all products are strictly in accordance with the IPC-A-600-H and IPC-6012 acceptance standards to ensure the quality of each product delivered to customers and reliability.

评论

发表评论

此博客中的热门博文

What are the Advantages and Disadvantages of the OSP Technology

图片
     With the continuous development of the electronics industry, there are more and more PCB surface treatment technologies, and each technology has its own merits. OSP is a commonly used surface treatment technology process, what are its advantages and disadvantages?       Compared with other surface treatment technologies, OSP is somewhat different.  It uses a chemical method to produce an organic film on the clean bare copper surface, which acts as a barrier between the copper and the air.   OSP is organic, not  metallic,   and its cost is lower than most surface treatment technologies.     Advantages: With this organic film, it can resist the attack of moisture in the air without being oxidized before welding,  can withstand the test of high temperature, maintain good activity, and has a good tinning ability.  This layer of organic film will not cause damage to the sheet material. It can be easily removed by the solder resist during soldering. It can solder the copper wire and the
阅读全文

What PCBA Problems Can AOI Inspect

图片
        With the development of science and technology, the volume of PCBA is getting smaller and more precise, and some defects in processing cannot be distinguished with the naked eye, so AOI has appeared.  So what PCBA problems can AOI inspect?   The working principle of AOI is to first collect and input parameters such as images, component positions, solder joints and other parameters of the good-quality board.   During the inspection, the instrument automatically scans the circuit board and automatically captures the image, and then compares the collected data with the pre-entered parameters to determine whether the characteristics of solder joints, components and other aspects are consistent. If the data is inconsistent, the d efect  will be flagged through the display for maintenance personnel to repair.     AOI is mainly used to inspect solder paste printing, component placement and soldering. For example: too much or too little solder paste,   solder paste printing offset;  co
阅读全文

The Role of Shield Cover in PCB Design

图片
  SHENZHEN HOYOGO ELECTRONIC TECHNOLOGY CO., LTD. specializes in providing overall PCBA electronics manufacturing services, and can also provide customers with a full range of value-added services: including SMT assembly, PCB program development, schematic design, PCB layout and routing, Bom list matching, component procurement and other services. Do you know the role of shield cover in PCB design? What is a Shield Cover? The shield cover is an alloy metal cover, which is a vital component to reduce the radiation of the display. It is used in MID or VR products, which can effectively reduce the mutual interference between modules. It is common in the isolation between the main control function module and the power module and the Wifi module. The  P urpose of  S hield  Cover   C lip Generally, there are products that use wireless communication, and shield frames are usually designed on the circuit board to isolate electromagnetic interference (EMI). However, to make the shield frame fun
阅读全文