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- W2079807632 abstract "Two technologically attractive concepts are currently being evaluated for front-side gettering in the vicinity of the active device region (proximity gettering). The first one employs high-energy carbon implantation and annealing to form a carbon-rich layer. The second approach involves the implantation of helium followed by annealing to create a cavity-containing layer. In this study we are concerned with the gettering behaviour of two typical transition-metal impurities, namely Cu and Fe, in as-received SIMOX material and in SIMOX wafers incorporating such proximity gettering layers. The structures are characterised by secondary-ion-mass spectrometry, Rutherford backscattering/channelling spectrometry, transmission electron microscopy and elastic recoil detection. It is shown that the final impurity distributions are sensitive to the depth location of the proximity-gettering layers. Both C and He implants are found to capture efficiently Cu atoms whereas cavity microstructures act as gettering centres for Cu, but provide no detectable trapping of Fe. Appreciable depletion of Fe is only achieved in the presence of C-rich gettering layers. From this viewpoint, implanted C layers may be preferable to cavity-containing zones formed by He implantation." @default.
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- W2079807632 date "1997-06-01" @default.
- W2079807632 modified "2023-10-18" @default.
- W2079807632 title "Impurity gettering effects in separation-by-implanted-oxygen (SIMOX) wafers: what getters what, where and how" @default.
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- W2079807632 doi "https://doi.org/10.1016/s0167-9317(97)00032-4" @default.
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