Abstract:
The method described provides for the following steps: delimiting active areas (81) on a substrate, forming gate electrodes (82, 83, 88) insulated from the substrate on the active areas, and subjecting the front surface of the substrate to several implantation steps with doping ion beams to form source and drain regions with the use of the gate electrodes as masks. The direction of the implantation beam is defined by an angle of inclination to the front surface and by an orientation (45 DEG , 135 DEG , 225 DEG , 315 DEG ) to a reference line (80) on the front surface. To avoid performing numerous implantation steps without foregoing channels of uniform and constant length (L''), the widths of the gate electrode strips (82, 83, 88) are determined at the design stage in dependence on the orientation of the strips to the reference line (80) and on the orientation of the directions of the implant beams.
Abstract:
Chip Outline Band (COB) structure for an integrated circuit integrated in a semiconductor chip having a semiconductor substrate (1) of a first conductivity type and biased at a common reference potential (GND) of the integrated circuit, the COB structure comprising a substantially annular region (3;30) formed in the substrate (1) along a periphery thereof, and at least one annular conductor region (40,60) superimposed on and contacting the substantially annular region (3;30), characterized in that said substantially annular region (3;30) is electrically connected at said common reference potential (GND).
Abstract:
The method described provides for the following steps: delimiting active areas (81) on a substrate, forming gate electrodes (82, 83, 88) insulated from the substrate on the active areas, and subjecting the front surface of the substrate to several implantation steps with doping ion beams to form source and drain regions with the use of the gate electrodes as masks. The direction of the implantation beam is defined by an angle of inclination to the front surface and by an orientation (45°, 135°, 225°, 315°) to a reference line (80) on the front surface. To avoid performing numerous implantation steps without foregoing channels of uniform and constant length (L''), the widths of the gate electrode strips (82, 83, 88) are determined at the design stage in dependence on the orientation of the strips to the reference line (80) and on the orientation of the directions of the implant beams.