| 摘要 |
An integrated circuit includes a resistive element in which a high- sheet-resistivity zone (11) connects two spaced-apart zones (12, 13). A conductive field plate (15) overlies the high- sheet-resistivity zone (11) and is insulated from it by a composite insulating layer (16, 17). The field plate (15) is connected to a node of the circuit and stabilises the resistance of the element by inhibiting depletion or inversion of surface regions of the high-sheet- resistivity zone (11). A suitable node is one (13) of the spaced-apart zones, preferably the one which in use is the more negative, in the case of a P-type high- sheet-resistivity zone. The invention is particularly applicable to linear integrated circuits where stable resistances are required. <IMAGE> |
