That's not correct. There are other solid state memory technologies that can be used.
For instance, you can make an SSD out of DRAM. It's not a very good choice for a laptop (because it will constantly suck up power) but they've been used in servers for a long time. Here is an example:
Reader Comments (Page 1 of 1)
Daryl Herbert @ Sep 29th 2007 12:21AM
"All SSD's are flash memory"
That's not correct. There are other solid state memory technologies that can be used.
For instance, you can make an SSD out of DRAM. It's not a very good choice for a laptop (because it will constantly suck up power) but they've been used in servers for a long time. Here is an example:
http://www.tomshardware.com/2005/12/05/hyperos_dram_hard_drive_on_the_block/
There are other non-volatile solid state memory technologies in development. In a few years (or maybe more than a few) they will be common in SSDs.