Found a method to see inside some chips, without having to unmount or destroy the chips.

Best part - the method only relies on lightly modded off-the-shelf cameras and lenses.

Read more at https://www.bunniestudios.com/blog/?p=6712

Infra-Red, In Situ (IRIS) Inspection of Silicon « bunnie's blog

@bunnie That's very fun, Bunnie - thanks for sharing and kudos on a cool result!

I wonder how much extra image quality you could get on the cheap by using image stacking, either for HDR or superresolution or both. (Even without going all the way to varying the angle of incidence).

@dave_andersen I think there's a ton of room for improvement -- these are pretty much raw frames at the moment with minimal touch-up!
@dave_andersen @bunnie This is cool. Re: image stacking, it reminds me of what @lcamtuf has done, like https://lcamtuf.substack.com/p/photographing-small-things
Photographing small things

Experience and hubris walk hand in hand. I’m a long-time photographer, and when I come across a nice photo, you can usually catch me mumbling to myself. “Ah yes, excellent. I could’ve done that with ease.” Most of my photography isn’t utilitarian, but I also illustrate my own writings; for a recent example, see

lcamtuf’s thing
@bunnie I wonder if the Raspberry Pi No-IR camera would work here as a cheap imaging device that comes without an IR filter.
@thejpster could be! most sensors I've tried have "enough" sensitivity at 1050nm. You can get around sensitivity issues partially by allowing the exposure to run longer, although that eventually gets limited by the dark current of the sensor. Alternatively, you can crank up the intensity of the illuminator...and at 1050nm you can get some impressively bright LEDs.
@bunnie might be worth a note to anyone looking to have a go - look after your eyes. If there’s little/no visible light coming off them you won’t have the “ah s… that’s bright” reflex to make you look away and you can seriously damage your eyes. When I built a high power bench top IR LED control system I was only allowed to test with one fitted with red LEDs :/

@bunnie Ah, groovy!

I'm grateful to have found you on ActivityPub/the FediVerse finally too!

@futurebird @bunnie
InfraRed. Not every Wavelength (Lightcolor) behaves the same with every Material :)

Pretty cool.

@bunnie Wow - this is an amazing technique. Thanks for sharing on that level of detail!
@bunnie You mean to tell me it's now possible to reverse engineer chips without crazy equipment like an electron microscope? That's pretty fuckin' amazing.
@bunnie that is so, so awesome 🤩 Thanks for sharing.
@bunnie Nifty, but the countermeasures are obvious, just use a case that's non-transparent to infrared.

@bunnie

@janbeta
@kenshirriff

This would seem to be in your respective wheelhouses 🙂

@bunnie Thanks! Will be investigating whether this imaging technique will work for chip level failure analysis.
@bunnie but can it distinguish between the sour cream and onion?