Electronics Forum | Fri Feb 17 07:23:29 EST 2017 | sevenfortyone
I'm a PCB designer working on a board that has a rubber keypad with control buttons mounted to it. The PCB contains the corresponding contact patterns for the buttons - a typical interlocking finger pattern. In the past when I've encountered this
Electronics Forum | Mon Jul 15 18:29:55 EDT 2002 | russ
Are you talking about selective wave pallets? Most of it depends on the minimum thickness of masking walls (design). I have had some that have lasted until the product went EOL (5000 passes or so. and some have made it about 50 passes. How's that
Electronics Forum | Sun Dec 10 20:17:51 EST 2017 | myke03o
Hi Dave, thanks for the response. * Improve your products that are used for thermal cycling testing of products of other companies? Yes we want to improve our products to pass thermal cycling and prolong the lifespan of the baord. * Change your pr
Electronics Forum | Fri Jan 21 15:33:43 EST 2005 | Mark
>Hours mean nothing on these machines. Correct me if I am wrong but isn't it true that heaters and blowers (maybe valves) have a specific lifespan? I would think that parts in an oven with many hours on it are due to fail sooner than those in one wit
Electronics Forum | Fri Nov 04 08:10:04 EST 2005 | Amol
Hi all, If i know my field conditions and the required lifespan of the final product, how can i decide what thermal cycle to use for ATC to qualify the product?? I have the JEDEC standards for min-max temps and dwells, but how do i translate them int
Electronics Forum | Wed Jul 17 11:43:31 EDT 2002 | johnw
It depend's as Russ say's on your pallets, things like : material type wall thickness floor thickness selective or open app. but also on the process, the volumes, the number of carriers you have vs the build numbers & cycle time and the machine your
Electronics Forum | Tue Apr 29 12:35:03 EDT 2003 | stepheno
Different viruses have different lifespans outside the host. HIV is something like a few seconds. The flu is something like 12 hours. Sars is something like 24 hrs. There are a lot more deadlier deseases. I think you would have a much greater chance
Electronics Forum | Thu Jan 09 11:15:12 EST 2020 | cyber_wolf
Stencil lifespan depends on several factors such as squeegee type, squeegee pressure, handling,and foil thickness to name a few. There is no magic number. The best judge is your SPI machine if you have one. We typically start thinking about replacem
Electronics Forum | Wed Jan 29 18:31:06 EST 2020 | slthomas
The 4 places I've worked in SMT all had their own solutions for their own reason. I quit worrying about what worked best if what I had worked OK. I've only seen (or recognized, at least) tension issues on foils that had been saved well beyond a rea
Electronics Forum | Sat May 13 07:03:16 EDT 2000 | Sal
guys, Currently running a very high volume product, with the gold fingers at the edge of the board masked off using Kapton tape to avoid any form of contamination during reflow and wavesoldering. I've heard alot of about the gold finger gloves, my q