The pic (taken from IBM ) above shows the general composition layers of a HD media.
So the carbon layer is to protect the magnetic layer
MAgnetic layer to store information
Underlayers to provide a return path for the magnetic flux
So, the above pic shows the plan view of the Alneva 3040, the sputtering machine.Yes, yes I know it's very cacat, drawn using Paint....
For those chambers in white, their function vary from machine to machine
LC- load camber
ULC- unload chamber
P0- etching chamber, remove the carbon layer on the carrier
P1- heating chamber
CHAmbers in between C1 n C2 are in-charge of the underlayers
P13- bottom magnetic layer
p14- top magnetic layer
p15- top magnetic layer
p16- cooling ( if the machine hangs, and the media got stuck in this chamber for 1 minute, it will be covered with a layer of ICE)
p17- cooling
p18- CVD
p19-CVD
p20- carbon
all corner chambers don't really have any function
Pressure in each chamber is about 3E-3 to 7E-3 TORR
7E-3 torr = 0.933256579 pascals
Standard atmospheric pressure is 101325 Pa
SO u put the media in the load chamber, after about 15 minute, you'll get a sputtered media out.
:)
