Phil Drumm Post subject: PCB Edge Keepout Posted: Mon Aug 01, 2005
2:23 pm Does anybody have a rule-of-thumb for minimum keep-out around
the edge of a PCB. My board is constrained by the case and I need all
the room I can get. There's no high power anywhere, but it is running
in the 2.4 GHz range. The PCB fabricators have a "standard" but I need
to to push the limit without taking too much risk. Thanks for your help.
Phil Top Guest Post subject: Keep Out AreaPosted:
Wed Aug 10, 2005 2:57 pm As for a minimum distance for a "Keep Out"
area, that depends on the manufacturer. As a maker of PCB prototypes
I like to tell my customers that as long as they are comfortable with
a trace or component that close to the edge I will make it, but I do
insist that a minimum of 4 mil (0.004" or 0.1mm) distance exist so that
the trace doesn't get rubbed out. Now this is certainly true for FR-4
or Rogers RO4003/4350 material or any other material that is stiff.
As for other soft material like Rogers 3000, 5000, or 6000 series, then
I will have to tell the customer to rethink what they are designing.
Basically, if the manufacturer is comfortable with it, go for it.
Regards, Ben Top Procyon PCB Post subject:
Posted: Wed Aug 10, 2005 2:59 pm Captain Joined: Wed
Aug 10, 2005 2:47 pm Posts: 6 Location: Baltimore, Maryland
As for a minimum distance for a "Keep Out" area, that depends on
the manufacturer. As a maker of PCB prototypes I like to tell my customers
that as long as they are comfortable with a trace or component that
close to the edge I will make it, but I do insist that a minimum of
4 mil (0.004" or 0.1mm) distance exist so that the trace doesn't get
rubbed out. Now this is certainly true for FR-4 or Rogers RO4003/4350
material or any other material that is stiff. As for other soft material
like Rogers 3000, 5000, or 6000 series, then I will have to tell the
customer to rethink what they are designing. Basically, if the
manufacturer is comfortable with it, go for it. Regards, Ben
_________________ www.procyonpcb.com Manufacturer of Quick
Turn PCB Prototypes Top Guest Post subject: Posted:
Fri Aug 26, 2005 3:30 pm From the board manufacturer's point of
view: As long as there is no copper present at the edges of the board,
they are happy. They do not want to cut through metal when they are
making the board panels. There is one exception, and that is
edge pads sometime made by placing large circular holes at the edge
of the PWB and then letting the board manufacturer cut right through
them before tin plating. Posted
11/12/2012
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