"Calif Bill" wrote in message
...



Did not know that about the Silverstone. We used sputtering for coating
the disks in disk drives.


The original disk drives were not vacuum deposited and the magnetic
orientation was horizontal, limiting the capacity of the disk. Sputtering
allowed columnar growth and the magnetic material had a vertical
orientation, a major breakthrough in terms of disk capacity.

We built several large in-line sputter deposition systems for hard disks for
Seagate and others. We also built a few CD coating systems. They were
amazing. They processed a raw CD blank in less than 2 seconds, depositing
about 600 Angstroms of aluminum (just short of becoming opaque).

Other companies blew us away though, doing the aluminum deposition, data
imaging, protective overcoat and applying the label in less time.

Eisboch