How do memory flash cards store their information?

Subject: How do memory flash cards store their information?

Date: Sat Sep 22 01:08:02 2001
Posted by Richard
Grade level: grad (science) School: Retired
City: Coquitlam State/Province: BC Country: Canada
Area of science: Physics
ID: 1001135282.Ph

Message:


Flash memory cards are used to store pictures in today's digital cameras.  They 
do not seem to need electricity to hold the information nor are they optical 
devices like a CD-ROM.  With no moving parts they retain the information 
indefinately.  How is this done?  My guess is that somehow a magnetic field is 
involved but with no movement (such as in a hard drive) how can the information 
be created and stored?

Re: How do memory flash cards store their information?

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