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[ÇóÖú] Ì«ÑôÄÜµç³ØÖÆÔ칤ÒÕÖеÄetch back

The samples were exposed to a 30 Ω/¡õ diffusion and an etch-back to approx. 100 Ω/¡õ.

For a selective FSF, the front surface hast to be masked
by inkjet- or screen-printing in the area that will be
contacted. The FSF is then etched back in an acidic
solution to the desired sheet resistance.

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