“…Although in principle more radiation resistant than η-type, p-type silicon surface barriers have received less attention due to the difficulty of obtaining a sufficient potential barrier height. Nevertheless, some successful results have been published [92]. Surface barriers with depletion layers of more than 10 mm have been realized on uncompensated high resistivity (up to 100 kQ.cm) p-type silicon as obtained by very high purification of the base material [93], To ensure long term stability, high reverse voltage, and low leakage current, the edges of the Schottky contact are protected with an epoxy glue after metallization.…”