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3M tape with anisotropic z-axis electrical conductivity

3m.com

131–140 of 146 posts

Re: 3M tape with anisotropic z-axis electrical conductivity

#131

Earlier quoted context omitted.

> Fluorinert is a super niche product. I mean, that goes both ways. At that price it will always be a super niche product, and never graduate to "plain niche". Look at the enthusiast market, there's no lack of fancy water cooling gizmos out there. They're bought by a small segment, but there's still a market for fancy gizmos to provide the best cooling for overclocked high end hardware. And that's exactly what I'm ge…

Isn't Flourinert a PFC and thus really dangerous/impactful in terms of accelerating global warming? I think we do well to keep its use to niche applications.

Yep. https://en.wikipedia.org/wiki/Fluorinert:

“As perfluorinated compounds (PFCs), all Fluorinert variants have an extremely high Global Warming Potential (GWP),[1] so should be used with caution”

That page also says

“Although Fluorinert was intended to be inert, the Lawrence Livermore National Laboratory discovered that the liquid cooling system of their Cray-2 supercomputers decomposed during extended service, producing some highly toxic perfluoroisobutene. Catalytic scrubbers were installed to remove this contaminant.”

Perfluoroisobutene is a schedule 2 substance, in the sense of the Chemical Weapons Convention (https://en.wikipedia.org/wiki/List_of_Schedule_2_substances_...), so it’s a substance that “can either be used as chemical weapons themselves or used in the manufacture of chemical weapons but that have small-scale applications outside of chemical warfare and so can be legitimately manufactured in small quantities”.

Re: 3M tape with anisotropic z-axis electrical conductivity

#132

Earlier quoted context omitted.

Proud, but only one? What's the calculus there, and why proud — if you don't mind me asking?

It was a slightly tongue in cheek comment :) You need to own at least 1 share to be eligible for the annual gift box, so I own one share. I think it's a solid dividend stock if you're into that kind of thing, but I'm not. I try not to have too much of my portfolio invested in individual stocks, or do anything else that would make the late Jack Bogle disappointed in me.

> he preached investment over speculation, long-term patience over short-term action, and reducing broker fees as much as possible. The ideal investment vehicle for Bogle was a low-cost index fund held over a lifetime with dividends reinvested and purchased with dollar cost averaging.

Wow, pretty cool guy for a banker — wonder what his "catch" was!

Re: 3M tape with anisotropic z-axis electrical conductivity

#133

Earlier quoted context omitted.

Just hold your breath while you're doing so......

Yeah, plus in last week's thread, we learned that basically all of these CPG and domestic manufacturers (including some of these blue chip companies were the ones polluting these superfund sites!

Good luck finding and collaring those shot-callers at this point!, they're all in New Zealand having a pint.

Re: 3M tape with anisotropic z-axis electrical conductivity

#134
post #105

This 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…

It's a shame your 6yo self didn't have a microscope around, or even a decent magnifying glass!

Zebra-strip is incredibly distinct once you're viewing it up close, and I bet its function would've immediately clicked upon seeing the structure.

Re: 3M tape with anisotropic z-axis electrical conductivity

#135

Earlier quoted context omitted.

Mineral oil is _very_ messy, which really doesn't help at all. And the one company that sold the tanks had to stop due to some patent nonsense.

According to https://en.wikipedia.org/wiki/Fluorinert#Toxicity Fluorinert has to be limited to closed systems because it has "high global warming potential", it can decompose into a highly toxic gas, and "care should be taken to avoid contact with eyes and skin" (I'll admit I'm not sure how all this squares with the 'inert' in the product's name) To me this sounds more difficult to use than mineral oil, not easier.

It does, yes. Seems like they have another product that fixes that issue, but it also sounds toxic. Not something I'd want to play with.

Re: 3M tape with anisotropic z-axis electrical conductivity

#136
post #109

Earlier quoted context omitted.

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…

The US government is very far from "the most corrupt" legislature in the world. I agree it's quite corrupt, though.

Can you name another country where you can bribe legislators and get away with it?

"Most corrupt" definitely fits.

Re: 3M tape with anisotropic z-axis electrical conductivity

#137

Earlier quoted context omitted.

I can't stand ear loops anyway, they hurt my ears. It helps that my hair has grew out during the whole "don't get close to people" thing. Ponytail + around-head straps is a great combo for maximum snugness (you can loop the top one under and the bottom one over).

I think it just varies, but I'm with you. It might be because I also wear glasses, do you? I feel like the ear loops press my glasses harder into my ears, preventing longer term wear (they're great for a half hour, not so good for six hours straight). I mostly use behind the head but foldable ones now, the ones to TC-84A-9315 spec (H95W) are pretty good for me but my nose is a bit too pointy to fit right at the nose.…

No glasses for me. Interestingly, my SO who wears glasses prefers some random behind the ear looped kn-95s. No accounting for comfort I guess.

Re: 3M tape with anisotropic z-axis electrical conductivity

#138
post #109

Earlier quoted context omitted.

The US government is very far from "the most corrupt" legislature in the world. I agree it's quite corrupt, though.

Can you name another country where you can bribe legislators and get away with it? "Most corrupt" definitely fits.

That's true in many, many countries. To pick one: Pakistan.

Re: 3M tape with anisotropic z-axis electrical conductivity

#139
post #109

Earlier quoted context omitted.

The US government is very far from "the most corrupt" legislature in the world. I agree it's quite corrupt, though.

When you use corruption in the sense of committing corrupt illegal acts, the US looks fairly clean. But if you define it in the general sense and include lobbying and sacrificing the public interest for private interests as corrupt, then in terms of the dollar values, US legislative systems are some of the most corrupt anywhere.

Maybe so, but if so, only because the USA has the biggest economy in the world.

Re: 3M tape with anisotropic z-axis electrical conductivity

#140
post #105

This 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…

It's a shame your 6yo self didn't have a microscope around, or even a decent magnifying glass! Zebra-strip is incredibly distinct once you're viewing it up close, and I bet its function would've immediately clicked upon seeing the structure.

Oh, I had a cheap magnifying glass; And I had access to a "Community Science Center" where they would have let me use a high-school-class microscope if I begged enough* . The problem was it didn't even occur to me to take that tiny rubbery strip that seriously. True shame really - by that time I had taken apart enough LCD calculators for there to be nothing surprising in any of them. This was the first surprise, in a while. I really should have focused on figuring it out. Just never occurred to me that the 10mmx1mmx1mm thingy was such an awesome thing.

*for free too; It was my favorite Saturday hangout spot - watching lab demonstrations, animal dissections etc, playing with the ever-changing interactive science demos).

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