cpu pins

[desmocat]

Just sitting here at work and was dismantling an old 486 chip and was wondering what the pins were made of that fit into the socket. They are gold colored,but I assume they would be made of a very good conductor,such as silver?
Yeah, it's kinda slow tonight.... http://sysopt.earthweb.com/forum/smile.gif

[RobRich]

I believe most 486 CPU used gold-plated aluminum for the pins.

BTW, do you have an openging where you work?! Sounds like a great job! http://sysopt.earthweb.com/forum/wink.gif

Later,
Robert Richmond

[desmocat]

Funny you should ask,we do have some openings..
But you have to work nights/weekends/holidays,it's in a steel mill in Texas. My brain is in neutral here,as witnessed by the first post.
That's the main reason I am going after a CCNA, to change fields.
One benefit of shift work,at night,get your work done, then lots of study/goof-off time until it's time to do some more work,and no boss ridin'ya about sitting down. http://sysopt.earthweb.com/forum/wink.gif

[welsh wizard]

desmocat,

Depends on if the boss is reading this http://sysopt.earthweb.com/forum/wink.gif

WW

[Erap!]

Steel mill? Go down and make urself a gigantic steel orb or some big heatsink! http://sysopt.earthweb.com/forum/smile.gif I dont think they'd miss a few kilos of steel!

[alpha]

Everybody dance now... Do - Do - DoDo - Do Do...

[voogru]

Steel mill? Go down and make urself a gigantic steel orb or some big heatsink! I dont think they'd miss a few kilos of steel

Sounds Like a Plan! http://sysopt.earthweb.com/forum/wink.gif

dont forget to get you buddies some Golden Orbs now I want 5 fans all Neatly stacked on top of each other http://sysopt.earthweb.com/forum/wink.gif

[Szech]

Hey alpha! Is that from the simpsons? http://sysopt.earthweb.com/forum/biggrin.gif

That was a funny episode.

[tonym]

The pins are made from Kovar. It's an iron-cobalt-nickel alloy whose coefficient of thermal expansion matches the ceramic in the package! It's then nickel plated (150-300 mircoinches) then a gold flash plate is applied (~50 microinches).

Just thought you'd like to know...


Tony

[Richard_Cranium72]

"Collective" Knowledge http://sysopt.earthweb.com/forum/smile.gif

Go Tony Go.

Like Desmocat, I too work some long hours with times of leisure.

Most others read garbage or goof off.

I engage in work, study or experimenting.

One night I discovered how to center drill a tiny object and insert another into the exact center.

One tool I use is called an "Alabama Lathe"

This is a battery powered drill and a file http://sysopt.earthweb.com/forum/smile.gif

The battery drills we use, have a common axis between the chuck centerline and the bottom of the battery.

I got a straight edge, laid the drills facing each other, with the speedo gear(1/8" dia) chucked in one and a sub-1/16" bit in the other.

With the gear spinning, you could see the EXACT center and drill into it.

The need was to insert a 1/16" pin into the center of this nylon pin/gear assy.

With the hole drilled slightly smaller, and centered, I heated a pin and let it melt itself into the already drilled hole.

Result, a factory perfect fit, but with a brass retaining end instead of nylon.

Several other handmade items have resulted from the long hours of boredom.

Re-sizing brushes for various electric motors is an easy job.

The manufacture of small and intricate parts with the "Alabama Lathe" are easily accomplished.

I've astonished several very experienced tradesmen at work with ideas that I've gotten from other people.

One time the Pipefitters needed to bend a 3/4" Stainless tube into a "shock" tube.

This was smaller in dia than the tubing benders would accomplish.

I got a tubing "cap" , filled the tube with very fine very dry sand. Capped the other end.
Instructed them as we found a pipe the correct size.

Then two gorillas(very large men)twisted the heavy wall tubing around the pipe and within 15 min we had made a shock absorbing tube rather than waiting for a delivery from 200 miles away.
Savings, $35,000 per hour for how ever many hours the deliver would have taken.

I'm not super smart, I just SUPER LISTEN.

Sometimes a goofy looking, or very Rude, or very nasty , or however strange the person may appear,,, may have information that is beyond the ordinary.

Watch, Look, Listen and above all ASK details.

I grill the young college grads at work too.
The NEW information taught in schools has changed since I graduated in 1901.
http://sysopt.earthweb.com/forum/smile.gif
DrVette

[desmocat]

I think Tonym wins the prize http://sysopt.earthweb.com/forum/smile.gif I put them in a carbon/sulfur determinator in our chem lab that uses the combustion process to analyze for the above 2 elements. Works like this:
sample is induction heated along with a small tin pellet to start melting,along with a small amount of tungsten to completeley burn the sample to make gas that is analyzed.
Anyway,the pins were put in a crucible with the melted remains of the above elements and they did not melt, only turned grey,so I knew they were something special. Thanks for the info, Tony. Mark

[This message has been edited by desmocat (edited 10-28-2000).]

[Richard_Cranium72]

Hey, Desmocat, Is that sorta like a Mass Spectrometer ?

I was reading the History of the device and it is reputed to have been designed at the turn of the century,, wild !!
http://masspec.scripps.edu/Nier.html

[desmocat]

Richard, What I used was a Leco Carbon/sulfur determinator. It burns the sample in a pure o2 enviroment, then passes the off gas through a photocell like apparatus that measures intensity drop of a glowing wire in the cell for each of the 2 elements. Carbon dioxide blocks a certain amount of the light relative to the concentration of the element,them the on board programs convert the data using response curves to give a readout in % carbon and sulfur.
We also use an ARL 4460 optical emmission spectometer to analyze for the remaining elements in the steel.
Short course: Arc is generated on sample surface,(in an inert atmoshpere of argon,because air will skew nitrogen readings,and it stabilizes the arc) light goes thriugh a primary slit onto a diffraction grating,and gets split into wavelengths corresponding to the elements we look for.
Light intensities for each element are refracted up into a PMT (photo multiplier tube)and computer interprets % of element relative to intensity and sends readout to a computer terminal that we use to store/printout results. All this happens in about 15 seconds.
Took a whole lot more time to type than it does to do!! http://sysopt.earthweb.com/forum/smile.gif
You too can have one of these instruments for a paltry $140,000..we have 2 of them in our lab.
they are pretty sensitive too..we can detect Boron in steel down to .00001%
to qoute foghorn leghorn: "I say,that ain't much,boy."

[Gomer]

My Campus job involves preparing soil and liter samples for Carbon Nitrogen Sulfur (CNS) analysis. I am a grunt for some researchers here. The most I do with the machine is load it and enter the sample data. The balance I use to prepare the sample is accurate to .0000001 grams. There isn't a day that goes by that I don't worry about breaking that **** thing. Anyway, if they ever caught me putting anything other then soil and litter in it I would be a dead man. It isn't a Carlo-Erba NA 1500 CNS Analyzer is it? It was weird to spend all day using one of those then read about someone else using it here. Whodathunkdit =)

[desmocat]

Gomer, the unit we use is a Leco cs-244.
Made by Leco corp in michigan,ours are kinda old, they were new in 1980 but still do the job. They breakdown sometimes,and we have to fix 'em on the fly, but we have 2 units along with the two spectrometers so we almost allways have 1 spec and 1 leco up at all times. They did a study and figured out that downtime in the meltshop was about $30,000 a minute,and when we only had one spec and it was down for 3 days,we couldn't make alloy steels, only steel for rebar, we lost about 300 grand. It doesn't take long to justify a $140,000 machine when that happens, does it? http://sysopt.earthweb.com/forum/wink.gif