I believe many people have heard of it since childhood,Cards such as ID cards and bank cards must not be placed together with the mobile phone, as they will be degaussed and cannot be used. This statement was actually correct 10 years ago, but now it is no longer a concern.Currently we are using the second generation ID card, which actually uses radio frequency chips to store information.That is, a contactless IC card. This kind of card usually consists of an IC chip and an induction antenna, and is packaged in a standard PVC card. The chip and antenna do not have any exposed parts.
If you shine a flash light on the lower left corner of the personal information side of the ID card, you can see a chip, and you can also see a coil around the card.
Through this coil, when the card is close to the surface of the reader and writer at a certain distance (usually 5-10cm), the data reading and writing operations can be completed through the transmission of radio waves.
In other words, there is no magnetic strip in the ID card at all.The reason for the failure of the ID card may be that the seat is broken, resulting in chip and coil failure, but it will never be demagnetized.
Degaussing generally refers to magnetic stripe cards, such as bank cards ten years ago. The iconic "swipe card" action of that year was to read the entry information.
However, our country has been issuing chip bank cards since 2011, and basically completed the comprehensive transformation in 2016. Nowadays, magnetic stripe bank cards and credit cards have basically disappeared, and there is no problem of degaussing.
Therefore, everyone can rest assured when using and storing cards in the future, and no longer need to worry about degaussing.