User Guide

Masks
Settings for the overmeasure of the solder stop mask (Stop) and the sol
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dercreammask(Cream)aremadehere.
DesignRules:SettingsforSolderStopandCreamFrame
The default value for solder stop is 4 mil, i.e. minimum value is maxi
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mumvalueis4mil.Thepercentvaluehasnoeffectinthiscase.
The value for the cream frame is set to 0, which means that it has the
samedimensionsasthesmd.
If values are given in percent, in the case of smds and pads of the form
Long or Offset, the smaller dimension is the significant one. The values
areconstrainedbyminimumandmaximumvalues.
The value for Cream is given positively, as is Frame, although its effect is
toreducethesizeofthe soldercreammask(creamframe).
The solder cream mask is only generated for SMDs, and is displayed on
layer 31, tCream, or layer 32, bCream. The solder stop mask is drawn in
layers29, tStop,or30, bStop.
Setting the flag STOP or CREAM (only for SMD) to OFF for a pad or
smd at the package definition forbids EAGLE to generate a solder stop
maskoracreamframeforit.
Limit determines, together with the hole diameter, whether or not a via
istobecoveredwithsolderstoplacquer.
Example:
The default value for Limit is 0. This means all vias get a solder stop
symbol.Theyarefreeofsolderstoplaquer.
Setthe Limit =24:
All through-plated holes with diameters up to 24 mil don’t get a solder
stop symbol (they are laquered), but vias with larger hole diameters get
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EAGLEManual