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Raster, 3.029x3.029mm package, pitch 0.65mm VFBGA-86, 6.0x6.0mm, 86 Ball, 10x10 Layout, 0.4mm Pitch, https://www.st.com/resource/en/datasheet/stm32l412t8.pdf ST WLCSP-49, off-center ball grid, ST die ID 471, 4.437x4.456mm, 100 Ball, 10x10 Layout, 0.55mm Pitch, https://www.dialog-semiconductor.com/sites/default/files/da1469x_datasheet_3v1.pdf#page=740 VFBGA-100, 10x10, 7x7mm package, pitch 0.8mm; see section 7.6 of http://www.st.com/resource/en/datasheet/stm32f446ze.pdf UFBGA-169, 13x13 raster, 7x7mm package, pitch 0.4mm; see section 6.1 of http://www.st.com/resource/en/datasheet/stm32f103ze.pdf Lattice caBGA-381 footprint for the setscrew hole, as seen at https://www.thingiverse.com/thing:3475324 * @todo Support knurling of the knurl properties. Module knurl( k_cyl_hg = 12, module knurled_cyl(chg, cod, cwd, csh, cdp, fsh, smt crn=ceil(chg/csh); echo("knurled cylinder max diameter: ", 2*cird); if( fsh < 0 shape(fsh, cird+cdp*smt/100, cord, cfn*4, chg); module shape(hsh, ird, ord, fn4, hg x0= 0; x1 = hsh > 0 ? Ord : ird; y0=-0.1; y1=0; y2=abs(hsh); y3=hg-abs(hsh); y4=hg; y5=hg+0.1; if ( hsh >= 0 module knurled_finish(ord, ird, lf, sh, fn, rn [ ord*cos(lf0), ord*sin(lf0), h0], [ ird*cos(lf0), ird*sin(lf0), h1], [ ird*cos(lf2), ird*sin(lf2), h1], [ ord*cos(lf1), ord*sin(lf1), h1], [ ird*cos(lf2), ird*sin(lf2), h1], [ ord*cos(lf0), ord*sin(lf0), h2], [ ord*cos(lf2), ord*sin(lf2), h0], [ ird*cos(lf1), ird*sin(lf1), h0], [ ird*cos(lf0), ird*sin(lf0), h1], [ ird*cos(lf2), ird*sin(lf2), h1], [ ord*cos(lf1), ord*sin(lf1), h1], [ 0,0,h2], [ ord*cos(lf0), ord*sin(lf0), h2], [ ord*cos(lf2), ord*sin(lf2), h0], [ ird*cos(lf0), ird*sin(lf0), h1], [ 0,0,h2], [ ord*cos(lf0), ord*sin(lf0), h0], [ ird*cos(lf1), ird*sin(lf1), h2], [ ord*cos(lf2), ord*sin(lf2), h0], [ ird*cos(lf1.

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