Two-dimensional nature of diffused layers and certain limitations in scaling-down coplanar structure

Limitation of the coplanar technology to geometry miniaturization has been investigated. Two-dimensional nature of diffused line capacitance in a coplanar structure is investigated for the first time delineating importance of the sidewall capacitance with decreasing feature size of devices. The effects of field channel-stop ion implantation on the narrow-channel effect, the field MOS threshold voltage, and the junction breakdown voltage are also discussed.