When you are given the task of designing an electromagnetic interference (EMI) shielded enclosure for a circuit board, understanding the balance between cost and performance is essential. There are many key decision points to always be aware of during the design process such as: budget (part price and tooling costs), galvanic compatibility, conductivity, the applications environment and how it relates to concerns with corrosion, material thickness, enclosure geometry (especially the shield height and how it relates to formability), application frequencies, short vs long term production quantities that will affect how your manufacturing method will evolve over time, packaging, and assembly of the shield onto the mating circuit board. One of the most crucial and fundamental decisions to consider after shield geometry is what material the shielded enclosure will be constructed from.
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The material choice will have a direct effect on project cost and application performance from an electromagnetic compatibility (EMC) point of view. Leader Tech Inc. offers a comprehensive selection of materials from pre-tin plated steel to high permeability metal to meet every designer’s needs. Our Applications Engineers are knowledgeable and ready to offer guidance to get you started in the right direction.
Popular Metals Used in RFI Shielding
The most common metals used by Leader Tech customers for RFI / EMI shielding are pre-tin plated steel in both bright and matte finishes and copper alloy 770, as known as nickel silver or German silver. Here is a quick look on how each one of them works:
Pre-Tin Plated Steel
Pre-tin plated steel is an ideal low cost solution that works well from lower frequencies in the kHz range through frequencies into the lower GHz range. Carbon steel has a permeability value in the lower hundreds range which provides the low-frequency magnetic shielding property that is missing in alloy 770, copper, or aluminum. The tin plating offers corrosion protection for the steel to prevent rusting as well as providing a great solderable surface to attach the shield to the traces on the surface board during assembly.
Copper Alloy 770 / Nickel Silver
Copper alloy 770, more commonly known as alloy 770, is a copper, nickel, zinc alloy used in EMI shielding applications mainly for its corrosion resistant properties. The alloy’s unified numbering system designation is UNS C. The base material is inherently aesthetic and does not require post plating to make it corrosion resistant or solderable. The material works well as an EMI shield beginning in the mid kHz range up into the GHz. The permeability is 1 which lends itself to be ideal in MRI related applications where no magnetic materials are permitted.
Copper
Copper is the most reliable metal in EMI shielding because it is highly effective in attenuating magnetic and electrical waves. From hospital MRI facilities to basic computer equipment, use of copper in RFI shielding serves the purpose effectively. Due to the versatility of this metal it can be easily fabricated along with its alloys brass, phosphorous bronze, and beryllium copper. These metals typically cost more than the alternative shielding alloys of pre-tin plated steel or copper alloy 770 but, on the other hand, offer a higher conductivity. Phosphorous bronze and beryllium copper are more commonly used in contact applications for batteries or springs due to their elasticity.
Aluminum
Although aluminum does pose a few fabrication challenges, it is still an excellent choice for a number of applications mostly due to its non-ferrous properties, its strength-to-weight ratio, and its high conductivity. Aluminum has nearly 60 percent of conductivity when compared with copper, however, using this metal needs precise attention to its galvanic corrosion and oxidation properties. The material will form into an oxide over time and has poor solderability on its own.
Intro
Are you looking for a way to protect your and other electronics from electromagnetic fields (EMF)? If so, you’re not alone. With the rise of technology and cell usage, it’s important to protect your electronics from potentially harmful EMF radiation. In this beginner’s guide, we’ll discuss how to choose the right EMF defense shield for your and other electronics. We’ll cover topics such as the different types of EMF shields, what materials to look for, and the potential benefits of using an EMF shield.
1) Understanding EMF Radiation
EMF radiation is a form of energy that is emitted by electronic devices and technology, including cell phones, laptops, and wireless routers. EMF stands for electromagnetic field, which is created by the movement of electrical charges through wires and other conductive materials.
While the impact of EMF radiation on human health is still being researched, some studies suggest that exposure to high levels of EMF radiation may increase the risk of certain health issues, such as cancer, reproductive problems, and neurological disorders.
EMF radiation is measured in units called hertz (Hz). The higher the frequency, the higher the level of radiation emitted. Radiofrequency (RF) radiation, which is emitted by cell phones and wireless devices, is a type of EMF radiation that is of particular concern due to its close proximity to the body when using these devices.
Understanding the potential risks of EMF radiation and taking steps to protect yourself can help you minimize your exposure and keep your body safe. Investing in an EMF defense shield for your and electronics is a smart way to reduce your exposure to EMF radiation and enjoy greater peace of mind.
2) The Importance of EMF Protection for and Electronics
Electromagnetic fields (EMFs) are all around us, and they can be emitted from electronic devices such as phones, laptops, and other electronic gadgets. While the effects of EMF radiation are still being studied, there is increasing evidence that it can have harmful effects on human health. EMFs can cause a variety of health issues ranging from headaches, insomnia, fatigue, and anxiety to more severe problems such as cancer and infertility.
With the proliferation of technology in our daily lives, it is vital to protect ourselves from the potentially harmful effects of EMFs. One way to do this is by using EMF defense shields for our phones and electronics. These shields are designed to block or reduce the amount of radiation that our devices emit.
By using EMF defense shields, we can minimize our exposure to EMFs and reduce the risk of potential health problems. Furthermore, using an EMF defense shield can also help improve the performance and longevity of our electronic devices.
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Investing in EMF protection for our phones and electronics is an important step towards maintaining our health and well-being. With the growing concern over the potential harm caused by EMF radiation, it is more important than ever to take measures to protect ourselves from this ubiquitous form of radiation.
3) Factors to Consider When Choosing an EMF Defense Shield
When choosing an EMF defense shield for your and electronics, there are several important factors to consider. First and foremost, you need to ensure that the shield provides adequate protection against the specific types of electromagnetic fields that your devices emit. This can vary depending on the frequency and intensity of the EMF radiation.
Another factor to consider is the size and compatibility of the shield. It should be designed to fit your or electronic device properly, without interfering with its functionality or appearance. Some shields may require you to remove your device's existing case or cover, so be sure to check for compatibility before making a purchase.
Additionally, it's important to consider the durability and quality of the EMF defense shield. Look for shields that are made from high-quality materials and have been tested and certified for their effectiveness. This will ensure that the shield will last for a long time and provide reliable protection against EMF radiation.
Lastly, consider the ease of use and convenience of the shield. Look for shields that are easy to install and remove, allowing you to switch them between devices if needed. Some shields may also offer additional features, such as anti-scratch or anti-glare properties, which can enhance your overall user experience.
By considering these factors, you can choose the right EMF defense shield for your and electronics, providing you with peace of mind and protection against harmful electromagnetic radiation.
4) Types of EMF Defense Shields Available in the Market
There are several types of EMF defense shields available in the market, and choosing the right one can be a bit overwhelming, especially for beginners. Here are some of the most popular types of EMF defense shields that you can choose from:
1. Radiation-blocking cases: These are cases specially designed to block radiation from your . They are usually made from materials that can absorb radiation and are highly effective at reducing your exposure to EMF radiation.
2. EMF protection stickers: These are small stickers that you can place on your or other electronics. They work by neutralizing the harmful effects of EMF radiation and are an affordable option for EMF protection.
3. Radiation-blocking headphones: These are headphones that are designed to block radiation from your . They work by redirecting the radiation away from your head, reducing your exposure to harmful EMF radiation.
4. EMF-blocking blankets: These are blankets made from special materials that can block radiation. They are designed to be used while you sleep and can help reduce your exposure to EMF radiation while you rest.
5. EMF protection pendants: These are wearable pendants that can protect you from harmful EMF radiation. They work by neutralizing the radiation around you, reducing your exposure to EMF radiation.
When choosing an EMF defense shield, it's important to consider your specific needs and the level of protection that you require. It's also essential to do your research and choose a reputable brand with good reviews.
5) Best EMF Defense Shields for and Electronics
When it comes to choosing the best EMF defense shield for your and electronics, there are several options available in the market. Here are some of the top choices to consider:
1. DefenderShield EMF Radiation Protection Case: This case offers comprehensive protection against both thermal and non-thermal radiation. It is specifically designed to block harmful EMF radiation emitted by phones and electronics.
2. SafeSleeve EMF Protection Cell Case: This case not only shields your from EMF radiation, but it also features a built-in wallet and RFID blocking technology to protect your credit card information.
3. SYB EMF Protection Pocket Patch: This adhesive patch can be attached to any electronic device to reduce EMF radiation exposure. It is small, discreet, and easy to use.
4. Aires Shield Pro: This EMF defense shield uses a combination of electromagnetic oscillation and scalar waves to neutralize harmful radiation. It can be used on phones, laptops, and other electronic devices.
5. EMF Harmony EMF Protection Pendant: This pendant is designed to be worn around the neck and provides protection against EMF radiation from all directions. It is stylish, lightweight, and offers long-lasting EMF defense.
Remember, when choosing an EMF defense shield, it is important to consider factors such as the level of protection offered, compatibility with your device, and personal preference. Ultimately, finding the right shield for your and electronics can help reduce your exposure to harmful EMF radiation and promote a healthier lifestyle.
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