On Wed, Jan 4, 2017 at 12:30 PM, Chuck Guzis <ccl...@sydex.com> wrote:
> On 01/04/2017 11:48 AM, Kyle Owen wrote: > > > Will the desired thickness be enough with sputtering or evaporation? > > For modern hard drives, sure, but my gut instinct is that you'd want > > a thicker coating on the drum. I'd suggest sputtering over > > evaporation since it will probably adhere to the surface better. I'd > > think nickel electroplating would take less time and effort, though. > > > > Heck, I have about 4 L of nickel plating solution as well as an > > anode, if someone wants to give it a shot. > > > Thinking more about this a bit... > > "Modern" aluminum-substrate plated media uses a layer of electroless > nickel, which is then polished, then plated with a layer of electroless > cobalt. I don't know if cobalt can be vacuum-sputtered onto nickel. > > Lubrication layers are often added in the case of Winchester drives. > > I suspect that the LGP30 drum heads require a substantial signal, so > perhaps 5 micron cobalt plating wouldn't work. In any case, the low > recording density might be better realized through a traditional > iron-oxide-in-binder coating. > > I am not a EE, but in a ignorant attempt at of the box thinking..... Make a new drum out of AL, glue strips of COTS magnetic tape to it. -- Charles
