Patent ID: 7683369

Claim:
A structure for measurement of body pinch resistance of high density trench MOSFET array co-located on a semiconductor wafer with a wafer substrate of first conductivity type, the high density trench MOSFET array having a common drain foundation layer of first conductivity type atop the wafer substrate, a two-dimensional (2D) trench MOSFET array atop the common drain foundation layer, the 2D-trench MOSFET array having an interdigitated column array of source-body columns and insulated gate trench columns, each source-body column having a bottom body region of second conductivity type with a first plurality of finger structures extending upwards therefrom and, correspondingly, each source-body column also having a second plurality of top source regions of first conductivity type bridging the finger structures, the structure for measurement comprises: a) a source-body column, atop the common drain foundation layer, wherein each top surface of a selected number of finger structures of the bottom body region further comprises a contact electrode formed thereon resulting in a corresponding number of contact electrodes; and b) two insulated gate trench columns, each atop the common drain foundation layer, flanking said source-body column and both further comprise a common gate contact electrode formed thereon whereby, upon electrical connection of the contact electrodes and the common gate contact electrode with a corresponding number of external biasing power supplies and voltage/current measurement devices, said body pinch resistance can be measured as the body pinch resistance through the bottom body region while mimicking the parasitic effect of neighboring trench MOSFET devices of the high density trench MOSFET array.