G. Mariani-regula et al., Gettering of platinum by cavities induced in silicon by high energy implantation of HE ions, MAT SCI E B, 71, 2000, pp. 203-206
Pt diffused diodes (p(+) n n(+) junctions) were manufactured on 75 mu m n-t
ype epitaxial Si wafers. Gettering of Pt by 3.1 MeV He-implantation induced
defects was performed. The fleunce was 10(17) He/cm(2). A post thermal ann
ealing at 1050 degrees C for 2 h gave rise to formation of a 0.2 mu m cavit
y layer at the predicted projected range (R-p) as measured by XTEM (cross s
ectional transmission electron microscopy). SIMS (secondary ion mass spectr
oscopy) crater profiles of both B and Pt revealed that the cavities are eff
icient sites to trap Pt atoms. (C) 2000 Elsevier Science S.A. All rights re
served.