Possible Duplicate:
custom and built in tikz fill patterns
Is it possible to change the thickness of patterns drawn by the TikZ pattern library (IV Libraries, 41 Pattern Library)? Setting thick on the node, only applies to the node itself, not the filling pattern.
\usetikzlibrary{patterns}
\begin{tikzpicture}
\node[square,thick,pattern={north east lines}] {}; % draws a thick square with a thin pattern
\end{tikzpicture}
pgflibrarypatterns.code.tex. – Count Zero Jul 20 '12 at 10:05north east linespattern, however, you're in luck: At http://tex.stackexchange.com/a/29367/2552 there's a new version of the pattern which allows changing the line width and the distance between the lines using keys. – Jake Jul 20 '12 at 10:24