Would be extremely useful to get an explanation of what 3M means is the "Z-axis" of the tape. Along the tape plane? Across the tape plane? Through the tape plane? I can see uses for all, but how you'd apply it would certainly differ if depending on which one is Z....
3M tape with anisotropic z-axis electrical conductivity
101–110 of 146 posts
Re: 3M tape with anisotropic z-axis electrical conductivity
#102This stuff is rad. I took a class on hardware implants with Joe Fitz a couple years back—on the heels of that wholly unsubstantiated Bloomberg article about China embedding rice grain-sized hardware implants into Supermicro motherboards that magically found their way only to select F100s and gov’t agencies—where we made a PCB to interface an ATtiny85 to an unpopulated UART header on some IoT device but instead of sol…
UART pins! That is such a good idea!! I need to get some of this stuff and make some stick-on connectors so I don't have to solder pins whenever I need a UART for 30 seconds to unbrick a router or something
Hold them on with one hand while you type a few commands over the serial connection with the other.
If you have more in depth debugging to do, get a 'helping hand' to hold it in place.
Re: 3M tape with anisotropic z-axis electrical conductivity
#103A while back I invested in 3M because it's a company that makes so many amazing and industry leading products and I thought they'd do well. A couple years later and the stock is just lagging. I guess they're dragged down by their environmental lawsuits these days. As a human, I'm appalled at their environmental track record but as an engineer, wow they really do so many things so well.
(I am one of those btw, I've sold what I had left early in the year and made a nice profit. Didn't get rich because you need to have money to make money, but it was a nice extra).
Re: 3M tape with anisotropic z-axis electrical conductivity
#104Earlier quoted context omitted.
It was also quite a plausible hack. The faker, if indeed anything was faked, knew more than most. Enough to have done the thing for real.
It was completely implausible - the chip that was identified could not possibly carry enough processing ability to do anything useful as far as espionage goes, had no connectivity to networking, and there was never any evidence of communication from these devices to anything suspicious or unknown.
Re: 3M tape with anisotropic z-axis electrical conductivity
#105I expected a flex cable connecting the lcd to the PCB but couldn't find one. I 'knew' rubber was an insulator, so no matter what that rubbery thing was (I guessed it was simply a spacer) it wasn't the connection between the two.
Didn't learn about the existence of z-tape for another decade or so and immediately the light bulb in my brain flashed, solving a childhood mystery.
Re: 3M tape with anisotropic z-axis electrical conductivity
#106This stuff confused the hell out of me as a 6-yr old electronics hobbyist (read unskilled-tear-downer). Took apart a non-functioning lcd calculator. Everything looked normal, except the lcd display itself was just pressed onto a rubbery tape like thing which seemed to be stuck to a line of pads in the pcb. I expected a flex cable connecting the lcd to the PCB but couldn't find one. I 'knew' rubber was an insulator, s…
Re: 3M tape with anisotropic z-axis electrical conductivity
#107Earlier quoted context omitted.
It was also quite a plausible hack. The faker, if indeed anything was faked, knew more than most. Enough to have done the thing for real.
It was completely implausible - the chip that was identified could not possibly carry enough processing ability to do anything useful as far as espionage goes, had no connectivity to networking, and there was never any evidence of communication from these devices to anything suspicious or unknown.
Re: 3M tape with anisotropic z-axis electrical conductivity
#108A while back I invested in 3M because it's a company that makes so many amazing and industry leading products and I thought they'd do well. A couple years later and the stock is just lagging. I guess they're dragged down by their environmental lawsuits these days. As a human, I'm appalled at their environmental track record but as an engineer, wow they really do so many things so well.
The stock market has nothing to do with the performance of a company; they are unrelated. Investing means betting on other investors to want to bump up the stock; it turned out to be really effective for e.g. Tesla where a lot of gullible amateurs got on top of it as well. (I am one of those btw, I've sold what I had left early in the year and made a nice profit. Didn't get rich because you need to have money to make…
Re: 3M tape with anisotropic z-axis electrical conductivity
#109Earlier quoted context omitted.
Your post comes across as being written by someone who is unhinged rather than someone trying to make a convincing argument. > This is the result of American capitalism and the worlds most corrupt banana republic legislature where bribery is so bad they made it legal. And things like that just sound silly and trying to string a bunch of buzz words together.
What about that did you not understand? You have a corrupt government, where no law gets passed without input from corporations via their lobbyists. They have this access because they pay bribes for the privilege. That's banana republic levels of corruption. The reason this is relevant is because your FDA and EPA are both captured organisations, which is what allows Dupont and these other environmental terrorists to…
I agree it's quite corrupt, though.
Re: 3M tape with anisotropic z-axis electrical conductivity
#110Earlier quoted context omitted.
And an efficient-market-PoV should, from an investor PoV, be put back on the shelve together with the other econ fairy tales like general equilibrium, rationality,... There's a reason funds prefer to hire STEM PhDs over economists.
No. An "efficient-market-PoV" isn't equivalent to the statement "the market is always 100% efficient", and in fact the entire concept of speculative investing is in fact predicated on this. If you want to beat the market, you must find the place where the market is inefficient, and the only way you can do that is if you know something that everyone else does not know. The "efficient-market-PoV" in this instance is si…
Base tier (and the one pretty much everybody can agree on): The expected value of the error of the market is zero. This means that the market does not always fundamentally overvalue or undervalue assets, and that, over time, it will overvalue things as often as undervalue.
(... many intermediate forms ...)
Strong efficient market hypothesis: The market price always reflects all accessible information, and every market movement is driven by new information.
The strong efficient market hypothesis is pretty evidently wrong (the existence of all the various quant funds that are generating outsize returns is strong evidence; it would also mean there are no stock bubbles. Having lived through 2 bubbles in my life, I can tell you: Bubbles exist, and there are many forces outside of new information that lead to them inflating and popping).