Copper pour or traces?
Hello,
I am laying out a little breakout board that spreads synchro data
(60/400Hz) throughout a system. This is the first board I have ever
layed out that I have contimplated using a 2-layer board instead of a
4-layer board. Because of this, I will not have independent GND/PWR
planes. Looking around at other 2-layer PCBs, I see that some folks
like to use a copper pour on the TOP and BOT layers. I am assuming one
layer is traces+GND and the other is traces+PWR. My questions are
these:
1. Is this a sound design (no high frequency and the signals are very
strong).
2. From reading, I was convinced to try to use hatching instead of a
solid copper pour to prevent warping.
3. If I do use cross hatching what should my grid be if my global
spacing for all traces, pads, layers, etc. is 8 mils.
Thank you.
.
Relevant Pages
- Re: Copper pour or traces?
... Double sided boards will normally have a copper pour on each ... solid copper pour to prevent warping. ... If I do use cross hatching what should my grid be if my global ... spacing for all traces, pads, layers, etc. is 8 mils. ...
(sci.electronics.design) - Re: Copper pour or traces?
... Double sided boards will normally have a copper pour on each ... solid copper pour to prevent warping. ... If I do use cross hatching what should my grid be if my global ... spacing for all traces, pads, layers, etc. is 8 mils. ...
(sci.electronics.design) - Re: Utility of copper pours on four-layer boards
... flooding the top and bottom layers of a four layer boards (where the inner layers are power and ground) comes from. ... I'm often having to get our techs to widen the clearance between the copper pours and controlled impedance traces because they like to set the clearance from the copper pour to the other signal nets so tightly that they end up turning microstrip lines into coplanar waveguides and significantly altering their impedances. ... It occurred to me that rather than continually dealing with this, it might be easier to just tell them not to use a copper pour on the top or bottom layers at all since I can't think of any particularly compelling reasons to do so in the first place. ...
(sci.electronics.design) - Re: Utility of copper pours on four-layer boards
... the top and bottom layers of a four layer boards (where the ... inner layers are power and ground) comes from. ... easier to just tell them not to use a copper pour on the top or bottom ...
(sci.electronics.design) - Re: Utility of copper pours on four-layer boards
... the top and bottom layers of a four layer boards (where the inner layers are power and ground) comes from. ... I'm often having to get our techs to widen the clearance between the copper pours and controlled impedance traces because they like to set the clearance from the copper pour to the other signal nets so tightly that they end up turning microstrip lines into coplanar waveguides and significantly altering their impedances. ... It occurred to me that rather than continually dealing with this, it might be easier to just tell them not to use a copper pour on the top or bottom layers at all since I can't think of any particularly compelling reasons to do so in the first place. ...
(sci.electronics.design) |
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