<B0101>
Did my final test, failed. Now writing up the wiki
<azonenberg>
i'm on hold for a bit, waiting for another batch of wafers to arrive
<azonenberg>
need more <110>
<azonenberg>
ordered two 2-inch both sides polished
<azonenberg>
going to keep one around for future use and evaporate a micron of Cr on both sides of the other
<B0101>
ok, and i am building a glove box
<azonenberg>
for particle reasons?
<azonenberg>
or do you need inert atmosphere for something
<B0101>
well, gonna use it for repairing HDD's and attempt to go to 70NM scale
<azonenberg>
70nm??
<azonenberg>
Are you like me on steroids or something? lol
<azonenberg>
i am having yield issues at 20 microns :p
<B0101>
lol
<B0101>
aluminum wafers... i don't know what can they be used for
<B0101>
oh yes, hard drive platters
<B0101>
azonenberg: have you done any experiments lately?
<azonenberg>
sorry was in another window
<azonenberg>
i'm actually going up to the cleanroom at my school tomorrow to help a friend debug yield issues lol
<azonenberg>
In terms of my own fab, i did a KOH etch a few days ago that worked very well
<azonenberg>
but i cant go any further until the new wafer arrives
<B0101>
ah, i see
<azonenberg>
Because i need a micron of Cr
<azonenberg>
and i dont have any blank wafers left to deposit on
<azonenberg>
all of my 2-inch have films on them and i mailed my 4 to swkhan so she can grow thermal oxide on it
<B0101>
ok
<azonenberg>
So i have two 2-inch 500um 2sp <110> coming in from MTI eta monday/tuesday
<azonenberg>
weds afternoon if i get a chance i'm gonna try and stick a micron of Cr on both sides of one
<azonenberg>
then do some KOH etches and a TEM cross section the following week
<azonenberg>
poor man's DRIE lol
<B0101>
heh
<flyback->
makes repetitive hand motions as he listens to a broken hd from work with a canucked head, preamp or adaptive parameters eeprom
<B0101>
azonenberg: do you have any idea where can i get disk drive parts?
<flyback->
B0101,
<flyback->
what kind of disk drive parts
<B0101>
hard disk read/write head
<B0101>
aka actuator
<flyback->
trying to repair a drive?
<B0101>
yup
<flyback->
you have to replace the whole head stack
<flyback->
there are plenty of online stores and ebay sellers
<flyback->
that sell to data recovery places
<B0101>
this drive has been clicking and clicking...
<flyback->
yeah either head or preamp on the arm has gone
<flyback->
do you even know how to change a head stack
<flyback->
btw
<flyback->
if it's a western digital you are out of of luck sorry
<flyback->
is it?
<B0101>
its is a western digital
<flyback->
your fucked then :/
<flyback->
whatever you do
<flyback->
DO NOT OPEN IT
<flyback->
they changed their drives some yrs ago
<flyback->
the head stack is axis fixed to the lid as well as the base
<flyback->
if you try to open it, it breaks the alignment
<flyback->
you need a $500 tool to do head stack changes with wd
<flyback->
which is why I will never buy them
<B0101>
i was told that if i put a screwdriver into the axis i should be able to find a spot which the drive can recalibrate and give access to the data
<B0101>
i wonder if that is true
<flyback->
that I don't know
<azonenberg>
Hmm, i am not familiar with HDD repair
<azonenberg>
i do know one person who fixed an HDD with a flaky motor in our school's class 100 cleanroom
<azonenberg>
just by bumping the platter with a gloved finger until it spun up, then copied data off
<flyback->
can't do that with wd anymore
<flyback->
because of the alignement
<flyback->
they fucked it
<flyback->
recovery companies were not amused either
<flyback->
www.hddguru.com see if anyone has come up with a way
<flyback->
B0101, you could try chilling the drive
<flyback->
NOT FREEEZING
<flyback->
I said chilling
<B0101>
i know
<flyback->
might get it to work long enough to image it
<flyback->
I suggest you use ddrescue and don't even try to read files etc off
<B0101>
dang! the guy who handed me the drive tried reading data off it more than 10 times to try to rescue the data on it
<flyback->
you could try a board change also but you would have to get a identical revision board
<flyback->
and you have to transfer the adaptive parameters eeprom
<flyback->
or transfer the programming
<azonenberg>
i'm sure someone making qubits at home knows how to resolder an eeprom :p
<B0101>
flyback: it seems like you have done HDD repair before
<B0101>
azonenberg: sure
<flyback->
YES
<flyback->
MANY times
<flyback->
haven't had to do board changes or heads yet
<flyback->
dunno what will happen when I finally start on  the box of hd's from 10-15 yrs ago
<flyback->
hoping I find some data I lost
<flyback->
but I pulled all the files off my dad's hd after 6 months of fighting with the hd
<CIA-67>
homecmos r143 | wiki/SQUIDfab.wiki | Edited wiki page SQUIDfab through web user interface.
<azonenberg>
swkhan: show delivered yesterday 0932
<azonenberg>
B0101: are you doing contact lithography? if so, how small are your features?
<B0101>
nope
<azonenberg>
So you're doing projection?
<B0101>
yup
<azonenberg>
at what range? what kind of optics? how much reduction?
<azonenberg>
and what kind of feature sizes are you working at?
<B0101>
sorry, I was on another window
<B0101>
feature sizes around 5 cm
<B0101>
set up uses DUV 248NM
<B0101>
I would say its proximity lithography
<B0101>
I am not really sure about reduction
<B0101>
Azonenberg: I just use the normal way of photolithography. (like how PCBs are made)
<azonenberg>
I'd classify that as contact
<azonenberg>
even if you arent quite in contact
<azonenberg>
What i meant was, are oyu reducing or not
<B0101>
nope i am not reducing
<azonenberg>
ok
<B0101>
sorry, I am a little bit tired though
<azonenberg>
no worries, i'm about to leave myself
<azonenberg>
ttyl
<B0101>
ok
<bart416>
azonenberg, I just face desked
<bart416>
can't believe this
<azonenberg>
bart416: what?
<bart416>
see query :P
<flyback->
canuckalin keeps me in the game
<flyback->
lorez feels the pain
<flyback->
man I got all these servo's and steppers with encoders
<flyback->
hmm
<flyback->
wrong channel
<flyback->
dammit
<azonenberg>
Lol, so it seems that my fab isnt the only one having adhesion issues with thick resist
<azonenberg>
this morning i went over the cleanroom with a friend to help him debug some adhesion issues
<azonenberg>
he is using a very thick photoresist that seemed to have the same adhesion issues i observed with tantalumfilm on improperly cleaned wafers