Patrick_Bateman :
I don't get why SSDs are so expensive?
The storage medium on hard drives and tapes is just a blank, (relatively) unstructured surface. By comparison, SSDs must have dedicated circuitry fabricated for each cell. That's probably the simplest explanation of why it's been so hard for solid state storage to catch up.
CRamseyer :
The fabs to make the flash cost 5 billion Dollars and take several years to build.
Fab construction and equipment cost is only one factor. It would be interesting to know how much this adds to the cost of each wafer, because it might not even be the largest term.
The other part of wafer cost is the material, energy, and labor needed to fab each mm^2 of die area. Then, multiply that by the number of dies needed for your SSD, scale by the yield, add overhead for testing and packaging, and then you need to get those chips on a board. And don't forget to add in some profit margin for the fab.
Of course, the SSD vendor has hardware & firmware design costs, as well as support, warranty, and advertising. But the structure of those costs is similar to what a mechanical hard disk vendor would face.
Anyway, just take a step back and consider that a typical consumer can buy over 2 trillion little circuits for a bit over $100. Pretty mind-blowing stuff, IMO. (Newegg has 480 GB SSDs for $112. 480 GB * 8 bits per byte / 1.5 bits per cell = 2.56 trillion cell, not counting over provisioning)