Re: gEDA-user: PCB connections

["Ian Chapman" <ian.chapman@xxxxxxxx>]

* Try turning of the pads and see if there is a small amount amount of
copper under the pad.
* Are your traces and pads on the same side of the board?
* Can you connect with with "auto enforce DRC clearance" off?

Hi John,
	The last suggestion enabled me to connect to the pad.  I guess that
there is something wrong with my footprint.  Also that PCB is not happy with
some of the high density SMT legacy footprints without clearance and mask.
I am concerned that no DRC will get me into other difficulties.

	I'll try your SQFP-50P-1680L1-1680L2-100N footprint tonight.
Looking at the pad definition you have 
Pad[-32479 -23616 -27412 -23616 1181 2000 3181 "" "1" 0x0100]

Thickness 1181
Clearance 2000 = 0.01"
Mask 3181

The TQFP100-14 that I started with ended having
Pad[-7500 3900 -2500 3900 1100 300 1200 "" "1" 0x00]

Thickness 1100 ;about the same
Clearance 300 = 0.0015" ;a lot less
Mask 1200 ;may be too close to the copper (must check)

Q1) I guess that Clearance/2 means enter 20000 to get 0.1" hipot clearance?

		Regards Ian.



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