SDD Materials : G10-FR4


Component(1) Fraction by weight A Z (Z/A) Density
[g/cm3]
Radiation Length
[cm]
Radiation Length
[g/cm2]
glass fiber (E-Glass) 0.60 23.6365 11.7291 0.49628 2.61 (a)   9.76601 25.4893
Epoxy resin Epotek 301-1 0.40 11.8991 5.9883 0.50326 1.19 (COI epoxy) 34.9894 41.6374
G10-FR4   18.9415 9.4328 0.49799 1.80 (2) 16.7608 30.1695
 
NEMA G10 from PDG
typically 60% SiO2 and 40% epoxy
        1.7 19.4 33.0
(1) For the composition, the PDG typcal values have been used (b1, b2) : 60% glass-fiber and 40% epoxy, by weight. The E-glass type was used since it is compatible with both G10 and FR4 (c1), c2)
(2) The density of G10 ranges from 1.6 (c2) to 1.77 and to 1.91(e1, e2) g/cm3

Calculation performed using the method described here and imposing the density of the compound.

The corresponding definition of this material in

 /* $Id: AliITSvPPRasymm.cxx,v 1.70 2003/08/14 20:24:51 nilsen Exp $ */ 
is :
  AliMaterial(25,"G10FR4$",0.17749E+02,0.88750E+01,0.18000E+01,0.21822E+02,0.99900E+03); 

 
 
 
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