PCB trace spacing with soldermask
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From: oparr on 16 May 2010 17:28 > Wrong. This phrase can also be read as "these groundrules apply for all > voltages up to 100V". You're trying to spin your way out of a silly remark.....Waste of time....Buzzzz off. On May 16, 1:07 pm, "k...(a)att.bizzzzzzzzzzzz" <k...(a)att.bizzzzzzzzzzzz> wrote: >
From: Phil Hobbs on 16 May 2010 18:04 oparr(a)hotmail.com wrote: >> We found that even with 4mil spacing breakdown didn't occur until >> about 2KV for surface traces and about KV for buried traces on >> ordinary FR4. > > Kevin, thanks. Information like this, to me at least, can be more > valuable than what some table or calculator returns IMO. > > On May 16, 1:03 pm, kevin93 <ke...(a)whitedigs.com> wrote: Of course there's temperature and humidity to worry about, and minor wire irregularities that cause electric field concentrations.... Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal ElectroOptical Innovations 55 Orchard Rd Briarcliff Manor NY 10510 845-480-2058 hobbs at electrooptical dot net http://electrooptical.net
From: oparr on 16 May 2010 18:20 > Of course there's temperature and humidity to worry about, and minor > wire irregularities that cause electric field concentrations.... I'll take my chances there instead of following pen and paper pushing bureaucrats. They are the ones who end up "owning" SOPs and standards these days after picking the brains of SMEs. And somehow, they never seem to get things right. On May 16, 6:04 pm, Phil Hobbs <pcdhSpamMeSensel...(a)electrooptical.net> wrote: >
From: Phil Hobbs on 16 May 2010 20:08 oparr(a)hotmail.com wrote: >> Of course there's temperature and humidity to worry about, and minor >> wire irregularities that cause electric field concentrations.... > > I'll take my chances there instead of following pen and paper pushing > bureaucrats. They are the ones who end up "owning" SOPs and standards > these days after picking the brains of SMEs. And somehow, they never > seem to get things right. > > On May 16, 6:04 pm, Phil Hobbs > <pcdhSpamMeSensel...(a)electrooptical.net> wrote: Oh, I wouldn't want to discourage you from relying on an engineering evaluation. I'd just encourage you to make sure it was a careful one. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal ElectroOptical Innovations 55 Orchard Rd Briarcliff Manor NY 10510 845-480-2058 hobbs at electrooptical dot net http://electrooptical.net
From: oparr on 16 May 2010 21:19
> Oh, I wouldn't want to discourage you from relying on an engineering > evaluation. I'd just encourage you to make sure it was a careful one. Only need spacing for 50VDC. Wasn't sure whether my usual minimum 8mil spacing was good enough. Now I am. On May 16, 8:08 pm, Phil Hobbs <pcdhSpamMeSensel...(a)electrooptical.net> wrote: > |