RESURFReduced Surface Field
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Dongbu HiTek's analog-savvy technologists achieved a breakdown voltage of more than 700V while maintaining low on-resistance by using a proprietary RESURF (Reduced SURface Field) technique.
The device consists of vertically stacking a MOS and a high-voltage Resistor, making use of trench-based vertical RESURF physics to achieve a record Ron with a high breakdown voltage and high Safe Operating Area (SOA).