Decapping a SOT23

On Monday, July 13, 2020 at 3:59:48 AM UTC-10, Phil Hobbs wrote:
> On 2020-07-12 11:44, Jeff Liebermann wrote:
> > On Sun, 12 Jul 2020 08:09:07 -0700, jlarkin@highlandsniptechnology.com
> > wrote:
> > 
> >> On Thu, 9 Jul 2020 16:14:32 -0700 (PDT), klaus.kragelund@gmail.com
> >> wrote:
> >>> For fun I need to inspect the die in a typical BC847 SOT23 plastic housing
> >>> How do one decap that transistor?
> >>> Cheers
> >>> Klaus
> > 
> >> Just curious, why do you want to see the die?
> > 
> > To watch them die, of course.
> > 
> > BC847BS (matched pair).
> > <https://zeptobars.com/en/read/diodes-BC847BS-matched-pair-bjt-npn>
> > or single:
> > <https://zeptobars.com/en/read/Phillips-BC847C-npn-BJT-transistor>
> > 
> > More dead dies (including a few possible fakes):
> > <https://zeptobars.com/en/>
> > 31 pages of decapsulated dead dies.
> > 
> > There doesn't seem to be a search feature on the web site, but Google
> > search works.  Search for:
> >     site:zeptobars.com BC847
> > as in:
> > <https://www.google.com/search?q=site:zeptobars.com+BC847>
> > 
> > 
> > 
> 
> For $5 per month on Patreon, you can send chips to the Zeptobars guy for 
> decapping.
> 
> Cheers
> 
> Phil Hobbs
> 
> -- 
> Dr Philip C D Hobbs
> Principal Consultant
> ElectroOptical Innovations LLC / Hobbs ElectroOptics
> Optics, Electro-optics, Photonics, Analog Electronics
> Briarcliff Manor NY 10510
> 
> http://electrooptical.net
> http://hobbs-eo.com

I would not handle nitric acid for ten thousand dollars.

On Mon, 13 Jul 2020 09:37:17 -0700 (PDT), omnilobe@gmail.com wrote:

>I would not handle nitric acid for ten thousand dollars.

Neither would I.  The salary of a lab assistant should be far more
than $10,000.  More like around $46,000:
<https://www.salary.com/research/salary/benchmark/laboratory-assistant-i-salary/ca>
Ask for a raise, or a hazardous materials handling bonus.

"LABORATORY SAFETY GUIDELINE, NITRIC ACID"
<https://www.ehs.harvard.edu/sites/default/files/lab_safety_guideline_nitric_acid.pdf>

Or, maybe watch a few videos on how to handle nitric acid:
<https://www.youtube.com/results?search_query=nitric+acid>

I had a bottle of nitric acid stored in my closet for many years.  It
was properly sealed in double layer polyethylene bottles and the
original shipping container.  Apparently, that wasn't good enough.
After about two years in the closet, all the metal items also stored
in the closet corroded into powder.  Concentrated ( >60%) nitric acid
will produce a protect oxide layer on the surface of most metals,
dilute nitric acid will not, thus promoting corrosion.  That was a
rather expensive mistake as I eventually had to rebuild the closet
down to the framing and sub-floor (because the nails rusted away).  I
replaced some drywall because a chemical test showed that there was
some acid absorbed into the gypsum.  All the metal buttons and studs
from my jackets and jeans rotted away.

So, I bought a used chemical storage cabinet, installed it outside of
the house, and moved my corrosives and flammables into the cabinet:
<https://www.google.com/search?q=chemical+storage+cabinet&tbm=isch>
Even so, I still had vapor problems in the cabinet, so I built a
separate plastic box just for the nitric acid.  That worked.


-- 
Jeff Liebermann     jeffl@cruzio.com
150 Felker St #D    http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann     AE6KS    831-336-2558