Posts by infosecdj@infosec.exchange
 (DIR) Post #B4qwi5lul8eRoAykGe by infosecdj@infosec.exchange
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       One digit is gone from the maskset revisions. :-)9/n
       
 (DIR) Post #B4qwi5tiI8tECMcyQK by infosecdj@infosec.exchange
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       After a bit more work. This is imaged using a dry objective.Planarity is shit but no visible scratches, which is amazing.Materials used: Allied 0.3u alumina suspension, Ted Pella Met-X cloth10/n
       
 (DIR) Post #B4qwi66TWh68pwbAJc by infosecdj@infosec.exchange
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       The same in oil immersion. All the interference colours gone, and there's slightly more contrast.Full-res map: http://infosecdj.net:8086/map/nxp/mp091a0/infosecdj_mz_nikpa60x_s2/11/n
       
 (DIR) Post #B4qwi6GkuTJzLpPNL6 by infosecdj@infosec.exchange
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       The rest of metal-5 is gone from the centre, and a lot of metal-4 is now missing on the sides.Full-res map: http://infosecdj.net:8086/map/nxp/mp091a0/infosecdj_mz_nikpa60x_s3/12/n
       
 (DIR) Post #B4qwi6RkFc6ztuY9T6 by infosecdj@infosec.exchange
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       Die ID is now gone too. Always amusing how things just vanish without a trace.13/n
       
 (DIR) Post #B4qwi6axhLU6MUrVpo by infosecdj@infosec.exchange
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       I am most intrigued by this set of cells not connected to anything else. Same cells found in groups elsewhere. Does anyone have an idea why is this here?14/n
       
 (DIR) Post #B4qxUrxUuAiz9neh9s by infosecdj@infosec.exchange
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       @azonenberg Hmm, a good guess. Though here is the same elsewhere on the die, the only connection I can see, or rather guess, is to metal-1 on the very outside of the die. I suppose we will see what happens when I get closer to m1.
       
 (DIR) Post #B512KsqTCDlKMY1dMu by infosecdj@infosec.exchange
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       @Rairii yeah, that is the way I like it. 6 out of 5 stars.
       
 (DIR) Post #B53BKH6Ynn2vDTFvk0 by infosecdj@infosec.exchange
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       @azonenberg The same ROI on metal1. Just as mysterious.
       
 (DIR) Post #B5Pet7f74cP2DKVN44 by infosecdj@infosec.exchange
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       Hi! A little bit late in the day, but #nakeddiefriday is still happening today.And today's exhibit is TC8568AM by Toshiba. This is a VFO to be used in floppy disk controllers. This is made very prominent on the die itself. Interesting how such a discrete part was still made in early 90s, where I kind of expected them to be replaced by fully integrated parts. A really short thread will follow.Full-res map: http://infosecdj.net/map/toshiba/tc8568am/infosecdj_mz_nikpa40x_66p/Many thanks to @RueNahcMohr for supplying this sample!#electronics #reverseengineering #microscopy
       
 (DIR) Post #B5Pet8RKBMy2cr3sDA by infosecdj@infosec.exchange
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       In the bottom left corner we have what looks like a die ID (D930 0001A) along with e-test features. These are two transistors with a common gate wire, which apparently has an ESD protection diode as well.
       
 (DIR) Post #B5PetANUyZ5ydZHqWe by infosecdj@infosec.exchange
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       At the bottom of the die are several pieces of special CMOS circuitry, I suspect this is where the VCO lives. Several prominent capacitor structures can be seen, formed between the poly layer and the substrate.
       
 (DIR) Post #B5PetApVIRUs2QODB2 by infosecdj@infosec.exchange
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       The standard cell library used elsewhere on the die looks rather unusual; both poly and diffusion features make large excursions outside power distribution rails.At the top of the snippet is what looks like an autorouter bug.
       
 (DIR) Post #B5PetBGRgH31NyzjAe by infosecdj@infosec.exchange
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       The crystal oscillator circuitry is stuck between two I/O blocks and covered by metal-2.
       
 (DIR) Post #B5PetBinypjUnwGNNI by infosecdj@infosec.exchange
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       This was a rather welcome diversion from the long-running deprocessing project, with large devices and perfectly readable cells. I hope you enjoyed looking at it as much as I did.And that'd be it for the day. Just wanted to remind that I am always happy to accept donations in any way or form, whether of samples, materials for processing them, or simply a fiver a month. All the links are in my profile.I wish you all a nice rest of this Friday and an amazing weekend to go with it. Until next time!
       
 (DIR) Post #B5PwOE4QzmsaHrlXma by infosecdj@infosec.exchange
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       @Rairii 7-elevenzip
       
 (DIR) Post #B5mCxs81vSh7P8aLwW by infosecdj@infosec.exchange
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       Nice.
       
 (DIR) Post #B5sjJW5qtZVaurgtyS by infosecdj@infosec.exchange
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       @astraleureka oh no, it's me every morning!
       
 (DIR) Post #B67UvFSGcYZeNM6lEG by infosecdj@infosec.exchange
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       @stux What's that about?
       
 (DIR) Post #B6YIBClSL4ucWpHQ1o by infosecdj@infosec.exchange
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       @azonenberg Peace was never an option.