摘要:
Methods and apparatus are provided for a MOSFET (50, 99, 199) exhibiting increased source-drain breakdown voltage (BVdss). Source (S) (70) and drain (D) (76) are spaced apart by a channel (90) underlying a gate (84) and one or more carrier drift spaces (92, 92′) serially located between the channel (90) and the source (70, 70′) or drain (76, 76′). A buried region (96, 96′) of the same conductivity type as the drift space (92, 92′) and the source (70, 70′) or drain (76, 76′) is provided below the drift space (92, 92′), separated therefrom in depth by a narrow gap (94, 94′) and ohmically coupled to the source (70, 70′) or drain (76, 76′). Current flow (110) through the drift space produces a potential difference (Vt) across this gap (94, 94′). As the S-D voltage (Vo) and current (109, Io) increase, this difference (Vt) induces high field conduction between the drift space (92, 92′) and the buried region (96, 96′) and diverts part (112, It) of the S-D current (109, Io) through the buried region (96, 96′) and away from the near surface portions of the drift space (92, 92′) where breakdown generally occurs. Thus, BVdss is increased.
摘要:
A tunable antifuse element (102, 202, 204, 504, 952) includes a substrate material (101) having an active area (106) formed in a surface, a gate electrode (104) having at least a portion positioned above the active area (106), and a dielectric layer (110) disposed between the gate electrode (104) and the active area (106). The dielectric layer (110) includes a tunable stepped structure (127). During operation, a voltage applied between the gate electrode (104) and the active area (106) creates a current path through the dielectric layer (110) and a rupture of the dielectric layer (110) in a rupture region (130). The dielectric layer (110) is tunable by varying the stepped layer thicknesses and the geometry of the layer.
摘要:
A tunable antifuse element (102, 202, 204, 504, 952) and method of fabricating the tunable antifuse element, including a substrate material (101) having an active area (106) formed in a surface, a gate electrode (104) having at least a portion positioned above the active area (106), and a dielectric layer (110) disposed between the gate electrode (104) and the active area (106). The dielectric layer (110) including the fabrication of one of a tunable stepped structure (127). During operation, a voltage applied between the gate electrode (104) and the active area (106) creates a current path through the dielectric layer (110) and a rupture of the dielectric layer (110) in a plurality of rupture regions (130). The dielectric layer (110) is tunable by varying the stepped layer thicknesses and the geometry of the layer.
摘要:
A tunable antifuse element (102, 202, 204, 504, 952) includes a substrate material (101) having an active area (106) formed in a surface, a gate electrode (104) having at least a portion positioned above the active area (106), and a dielectric layer (110) disposed between the gate electrode (104) and the active area (106). The dielectric layer (110) includes a tunable stepped structure (127). During operation, a voltage applied between the gate electrode (104) and the active area (106) creates a current path through the dielectric layer (110) and a rupture of the dielectric layer (110) in a rupture region (130). The dielectric layer (110) is tunable by varying the stepped layer thicknesses and the geometry of the layer.
摘要:
Methods and apparatus are provided for a MOSFET (50, 99, 199) exhibiting increased source-drain breakdown voltage (BVdss). Source (S) (70) and drain (D) (76) are spaced apart by a channel (90) underlying a gate (84) and one or more carrier drift spaces (92, 92′) serially located between the channel (90) and the source (70, 70′) or drain (76, 76′). A buried region (96, 96′) of the same conductivity type as the drift space (92, 92′) and the source (70, 70′) or drain (76, 76′) is provided below the drift space (92, 92′), separated therefrom in depth by a narrow gap (94, 94′) and ohmically coupled to the source (70, 70′) or drain (76, 76′). Current flow (110) through the drift space produces a potential difference (Vt) across this gap (94, 94′). As the S-D voltage (Vo) and current (109, Io) increase, this difference (Vt) induces high field conduction between the drift space (92, 92′) and the buried region (96, 96′) and diverts part (112, It) of the S-D current (109, Io) through the buried region (96, 96′) and away from the near surface portions of the drift space (92, 92′) where breakdown generally occurs. Thus, BVdss is increased.
摘要:
Apparatus and related fabrication methods are provided for capacitor structures. One embodiment of a capacitor structure comprises a plurality of consecutive metal layers and another metal layer. Each via layer of a plurality of via layers is interposed between metal layers of the plurality of metal layers. The plurality of metal layers and the plurality of via layers are cooperatively configured to provide a first plurality of vertical conductive structures corresponding to a first electrode and a second plurality of vertical conductive structures corresponding to a second electrode. The plurality of consecutive metal layers form a plurality of vertically-aligned regions and provide intralayer electrical interconnections among the first plurality of vertical conductive structures. The first metal layer provides an intralayer electrical interconnection among the second plurality of vertical conductive structures, wherein each vertically-aligned region has a vertical conductive structure of the second plurality of vertical conductive structures disposed therein.
摘要:
A single-poly non-volatile memory includes a PMOS select transistor (210) formed with a select gate (212), and P+ source and drain regions (211, 213) formed in a shared n-well region (240), a serially connected PMOS floating gate transistor (220) formed with part of a p-type floating gate layer (222) and P+ source and drain regions (221, 223) formed in the shared n-well region (240), and a coupling capacitor (230) formed over a p-well region (250) and connected to the PMOS floating gate transistor (220), where the coupling capacitor (230) includes a first capacitor plate formed with a second part of the p-type floating gate layer (222) and an underlying portion of the p-well region (250).
摘要:
A single-poly non-volatile memory includes a PMOS select transistor (210) formed with a select gate (212), and P+ source and drain regions (211, 213) formed in a shared n-well region (240), a serially connected PMOS floating gate transistor (220) formed with part of a p-type floating gate layer (222) and P+ source and drain regions (221, 223) formed in the shared n-well region (240), and a coupling capacitor (230) formed over a p-well region (250) and connected to the PMOS floating gate transistor (220), where the coupling capacitor (230) includes a first capacitor plate formed with a second part of the p-type floating gate layer (222) and an underlying portion of the p-well region (250).
摘要:
Latch-up of CMOS devices is improved by using a structure having electrically coupled but floating doped regions between the N-channel and P-channel devices. The doped regions desirably lie substantially parallel to the source-drain regions of the devices between the Pwell and Nwell regions in which the source-drain regions are located. A first (“N BAR”) doped region forms a PN junction with the Pwell, spaced apart from a source/drain region in the Pwell, and a second (“P BAR”) doped region forms a PN junction with the Nwell, spaced apart from a source/drain region in the Nwell. A further NP junction lies between the N BAR and P BAR regions. The N BAR and P BAR regions are ohmically coupled, preferably by a low resistance metal conductor, and otherwise floating with respect to the device or circuit reference potentials (e.g., Vss, Vdd).
摘要:
Latch-up of CMOS devices (20, 20′) is improved by using a structure (40, 40′, 80) having electrically coupled but floating doped regions (64, 64′; 65, 65′) between the N-channel (44) and P-channel (45) devices. The doped regions (64, 64′; 65, 65′) desirably lie substantially parallel to the source-drain regions (422, 423; 432, 433) of the devices (44, 45) between the Pwell (42) and Nwell (43) regions in which the source-drain regions (422, 423; 432, 433) are located. A first (“N BAR”) doped region (64, 64′) forms a PN junction (512) with the Pwell (42), spaced apart from a source/drain region (423) in the Pwell (42), and a second (“P BAR”) doped region (55, 55′) forms a PN junction (513) with the Nwell (43), spaced apart from a source/drain region (433) in the Nwell (43). A further NP junction (511) lies between the N BAR (64) and P BAR (65) regions. The N BAR (64) and P BAR (65) regions are ohmically coupled, preferably by a low resistance metal conductor (62), and otherwise floating with respect to the device or circuit reference potentials (e.g., Vss, Vdd).