Plus conductive foam is just more general and broad. As far as the Faraday cage around the foam, the ESD "Shielding" bags are perfect to put around the product rather than the foam. These bags are made with multi-layers that block electric charges and provide a conductive path around the product. Putting it around the product can save a lot of cost of the much larger bag needed to get around the bulky foam.
Technically, using this type of bag, any foam will work. In practicality, since the foam is in the presence of the product, the bag may be punctured or torn, or the product is often removed from the bag near the foam, the ESD foam is still desirable. Bottom line, with a shielding bag, I would use anti-static foam; with a static dissipative bag not recommended for products containing microelectronic devices , I would use the dissipative foam.
I have not worked with products that required the conductive foam but I would not rely on it to provide a great Faraday cage with a surface resistance of more than a few ohms. Sign up to join this community. The best answers are voted up and rise to the top.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Anti-static vs. Ask Question. Asked 7 years, 7 months ago. Active 2 years, 10 months ago.
Viewed 33k times. I put together a rough guide to the best application of the three types of foam for the five following broad usage categories: Bare populated boards with no battery. Single-use: Anti-static pink inside of a silver conductive bag. Multi-use: Conductive black foam. Battery cells: Single-use: Anti-static pink inside of a silver conductive bag. Multi-use: Static dissipative black foam inside of a conductive bag. Bare boards with battery cells.
Assembled devices without battery cells. Assembled devices with battery cells. Community Bot 1. The formatting could use some help! If you post a short answer by clicking on the "Answer Your Question" button below , you can get credit for the answer.
As the first quarter of came to a close, we shared information relative to global supply chain challenges with specific focus on our silicone rubber supply chain. To combat… read more. Grounding and Coupling — A surface resistivity of 0. Dust Sealing — Microcellular structure prevents ingress of contaminants and good sealing effectiveness. Minimal Thickness for Compact Designs — 0. Shock and Vibration — Energy absorbing formulation reduces vibration transmission and can absorb shock without breaking electrical contact.
PET Support — A thin film layer provides dimensional support and a durable bearing surface if needed. Where Are Conductive Foams Useful? Generally, the foam will have permanent conductive performance, meaning it is ideal for multi-trip packaging and in-plant handling applications. Conductive Foam: Conductive foam is a polyethylene foam filled with carbon as are all black ESD foams , giving it its conductive properties and color. Conductive foam is designed for repeat use, and will act like a Faraday cage when an item is fully enclosed within it.
Because of this a silver conductive bag is not needed as an outer container when using conductive foam. Conductive foam will drain batteries if their contacts have a path the foam, so care must be taken to prevent this by insulating the contacts or using a static dissipative foam layer between the conductive foam and the item being packed. There are two grades of conductive foam: lead-insertion grade and component grade. Lead-insertion grade conductive foam is designed to have components directly mounted into the foam via their leads, and will drain charge off of attached components.
Cushion grade conductive foam is designed to package something like a circuit board or hard disk drive. Conductive foam should be used when it's properties as a faraday cage and conductor are needed e.
0コメント