Microwaving an IC. Anyone know what happens?

On 20 Jan 2013 05:29:36 GMT, Jasen Betts <jasen@xnet.co.nz> wrote:

On 2013-01-19, etpm@whidbey.com <etpm@whidbey.com> wrote:
On Sat, 19 Jan 2013 13:38:52 +0000 (UTC), Ian Malcolm
See.My.Sig.for.email@totally.invalid> wrote:

Mr Ron <MrRonMan@sand-hill.freeserve.co.uk> wrote in
news:5310694ac9MrRonMan@sand-hill.freeserve.co.uk:

In article <op.wq4jncfuwei6gd@phenom-pc>, David Eather
eather@tpg.com.au> wrote:

That's not what I meant. I was thinking that IC residue might effect
the experimenter

I undertstand that burnt electronic parts can be carciogenic and are
probably harmful anyway if not.

Ron


So can burnt toast, a nicely seared steak, or smoked salami.

Lets not even mention the risks of soldering . . . .

Use a plate you are never going to use for food, cover the experiment
with a glass jar or similar, clean the microwave afterwards and the risks
are minimal.

Use some common sense and DO NOT microwave any power devices that may
contain Beryllium Oxide, or components that are likely to contain
significant quantities of high toxicity heavy metals, fluorocarbons or
known carcinogens (except California only ones!).
All this talk and no action. Yesterday I microwaved an IC from a cell
phone. Nothing happened, even after 1 minute, except the chip may have
gotten a little warm.

Did the chip still work after?
Beats me. I cut it from the cricuit board from a dead cell phone. I

guess I could nuke a 555 chip. I have one of those in a board that I
can unplug it from and re-install after treatment. But I paid about 2
bucks for the chip. If someone sends me 2 bucks worth of stamps I'll
try it.
Eric

 

[Michael A. Terrell]

etpm@whidbey.com wrote:

Beats me. I cut it from the cricuit board from a dead cell phone. I
guess I could nuke a 555 chip. I have one of those in a board that I
can unplug it from and re-install after treatment. But I paid about 2
bucks for the chip. If someone sends me 2 bucks worth of stamps I'll
try it.
Eric

$2 for a 555? They saw you coming.

NEW-100-x-NE555-IC-555-Timer $6.48
http://www.ebay.com/itm/261105241767

 

[Jasen Betts]

On 2013-01-21, etpm@whidbey.com <etpm@whidbey.com> wrote:

On 20 Jan 2013 05:29:36 GMT, Jasen Betts <jasen@xnet.co.nz> wrote:


Did the chip still work after?
Beats me. I cut it from the cricuit board from a dead cell phone. I
guess I could nuke a 555 chip. I have one of those in a board that I
can unplug it from and re-install after treatment. But I paid about 2
bucks for the chip. If someone sends me 2 bucks worth of stamps I'll
try it.

I've got a 13 cent 555 chip here I'll nuke that.

I gave it 11 seconds in the 700W microwave sitting on the base of an
upturned jam jar. I didn't witness any arcing between the IC pins,
heating, smoke, odor, discolouring, or any other gross signs of damage.

but afterwards the the STmicro NE555N DIP8 didn't work so well. The
microwaves seem to mashed the internals up, the switching thresholds
have become mobile drifting after power-up and causing the frequency
start wrong and to drift, it's probably leaking current internally
and misbehaving more than is immediately apparent.


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[Jasen Betts]

On 2013-01-22, Jasen Betts <jasen@xnet.co.nz> wrote:

but afterwards the the STmicro NE555N DIP8 didn't work so well.

I put it in the toaster-oven and heated it to 240C
let it cool and it's working again (but probably at reduced capability)

The microwaves may have zenered a few B-E junctions that could be
repaired by annealing

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[George Herold]

On Jan 22, 4:34 am, Jasen Betts <ja...@xnet.co.nz> wrote:

On 2013-01-22, Jasen Betts <ja...@xnet.co.nz> wrote:

but afterwards the the STmicro NE555N DIP8 didn't work so well.

I put it in the toaster-oven and heated it to 240C
let it cool  and it's working again (but probably at reduced capability)

The microwaves may have zenered a few B-E junctions that could be
repaired by annealing

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Interesting, thanks

George H.

 

[David Eather]

On Wed, 23 Jan 2013 02:37:27 +1000, George Herold <gherold@teachspin.com>
wrote:

On Jan 22, 4:34 am, Jasen Betts <ja...@xnet.co.nz> wrote:
On 2013-01-22, Jasen Betts <ja...@xnet.co.nz> wrote:

but afterwards the the STmicro NE555N DIP8 didn't work so well.

I put it in the toaster-oven and heated it to 240C
let it cool and it's working again (but probably at reduced capability)

The microwaves may have zenered a few B-E junctions that could be
repaired by annealing

--
⚂⚃ 100% natural

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Interesting, thanks

George H.

Very.

Many thanks