25/07/2002 09:23:29, "Juha Pajunen" <[EMAIL PROTECTED]> wrote:
>1. The BIG pad (50,30) connected to 1.8 net (split plane), >should DRC detect short circuit, because pad is NOT totally >inside 1.8 split plane? Why it is connected to 1.8 net, >whole pad IS NOT inside split plane? Yes - I think these planes are shorted together by that big pad. I get DRC errors flagged when I vahve vias close to the edge of planes, but not when they're touching - this does seem to be wrong behaviour. I used to get boards with planes shorted together this way, so I always manually check round my plane boundaries now before shipping a board. If anyone knows a rule I could turn on to automate this, I'd be garteful (and I suspect so would Juha... Oddly, I haven't had to move any vias recently - either my rules to Specctra have been avoiding the problem, or I've been lucky... (Also, I don't seem to have had any instance of this since I abandoned thermal reliefs on vias...) Making the plane cutout tracks wider than any via solves the problem, but may be too much of a compromise. For what it's worth, I'd _never_ call a net "1.8". That's far too likely to trip up broken software, either in Protel or in external packages. It's also annoying if you want to use it as a net label, as the auto-incrementer wil "helpfully" make the next one "1.9", which isn't normally what you want. I'd use "VDD_1.8V" or "VDD_CORE", which stays valid even when the process changes and the voltage needs to be lower. Steve Wiseman ************************************************************************ * Tracking #: 51F3698CCF892442A9BE36909E1772E3BFC09A9D * ************************************************************************ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/proteledaforum@techservinc.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
