摘要:
Lateral FET structure is disclosed for bidirectional power switching, including AC application. A notch extends downwardly from a top major surface to separate left and right source regions and left and right channel regions, and direct the drift region current path between the channels around the bottom of the notch. Split gate electrodes in the notch proximate the channels control bidirectional conduction, and are at non-common potentials in the OFF state to increase breakdown voltage. Self-shielding of the gates is also disclosed to further increase OFF state breakdown voltage.
摘要:
Lateral FET structure is disclosed for bidirectional power switching, including AC application. A notch extends downwardly from a top major surface to separate left and right source regions and left and right channel regions, and direct the drift region current path between the channels around the bottom of the notch. Gate electrode means in the notch proximate the channels controls bidirectional conduction.
摘要:
MOMOM structural geometry and fabrication techniques are disclosed. A first oxidizable metal strip (3) and a second coplanar nonoxidizable metal strip (6) are deposited on an insulating substrate (2). An insulating layer (12) is deposited on the metal strips, followed by deposition of a third nonoxidizable metal layer. A generally vertical notch (14) is cut through the layers to the substrate providing left and right sections (15, 16) of the third metal layer, left and right sections (19, 20) of the insulating layer, and the first and second metal layers with facing edges (23, 24) spaced by the notch therebetween. An oxidized tip (25) is formed at the facing edge of the first metal layer. A fourth metal layer (26) is ballistically deposited over the oxidized tip and the left section of the third metal layer, using the notch edge of the right section of the third metal layer as a shadow mask, followed by oxidization of the fourth metal layer. A fifth horizontal metal layer (30) is ballistically deposited by a vertically columnated beam along the substrate across the bottom (28) of the notch between the oxidation layer on the fourth metal layer and the facing edge (24) of the second metal layer. The M-O-M-O-M structure is provided by the first metal layer (3)--the oxidized tip (25)--the fourth metal layer (26) at a generally vertical portion (39)--the oxidation layer (29) on the fourth metal layer at a generally vertical portion (41)--the fifth metal layer (30) and the second metal layer (6).
摘要:
A power JFET (2) has a common drift region (4) between split first and second longitudinally separated sets of rows (6, 8) of alternating conductivity type layers (10-20 and 21-31) forming a plurality of channels (11, 13, 15, 17, 19, 22, 24, 26, 28 and 30). The JFET has an ON state conducting bidirectional current horizontally longitudinally through the common drift region and the channels. The JFET has an OFF state blocking current flow through the channels due to horizontally lateral depletion pinch-off. The layers of the rows extend vertically and horizontally longitudinally such that the direction of layering extends horizontally laterally. Particular gate structure is disclosed.
摘要:
MOMOM structural geometry and fabrication techniques are disclosed. A first oxidizable metal strip (3) and a second coplanar nonoxidizable metal strip (6) are deposited on an insulating substrate (2). An insulating layer (12) is deposited on the metal strips, followed by deposition of a third nonoxidizable metal layer. A generally vertical notch (14) is cut through the layers to the substrate providing left and right sections (15, 16) of the third metal layer, left and right sections (19, 20) of the insulating layer, and the first and second metal layers with facing edges (23, 24) spaced by the notch therebetween. An oxidized tip (25) is formed at the facing edge of the first metal layer. A fourth metal layer (26) is ballistically deposited over the oxidized tip and the left section of the third metal layer, using the notch edge of the right section of the third metal layer as a shadow mask, followed by oxidization of the fourth metal layer. A fifth horizontal metal layer (30) is ballistically deposited by a vertically columnated beam along the substrate across the bottom (28) of the notch between the oxidation layer on the fourth metal layer and the facing edge (24) of the second metal layer. The M-O-M-O-M structure is provided by the first metal layer (3)-the oxidized tip (25)-the fourth metal layer (26) at a generally vertical portion (39)-the oxidation layer (29) on the fourth metal layer at a generally vertical portion (41)-the fifth metal layer (30) and the second metal layer (6).
摘要:
A lateral bidirectional power FET (2) has a common drift region (6) between first and second stacks (8, 10) of alternating conductivity type layers (12-17 and 18-23). A notch (38) extends vertically downwardly into the drift region and laterally separates the stacks above the drift region. The stacks include a plurality of channel-containing regions (12-14 and 18-20) interleaved with a plurality of source regions (15-17 and 21-23). In the ON state, bidirectional current flows serially through the source regions and channels of each stack and through the drift region. In the OFF state, voltage is dropped across the plurality of junctions in series in the stacks, and the respective junctions with the drift region.
摘要:
An AC solar cell is provided by a pair of PN junction type solar cells connected in antiparallel between a pair of main terminals, and means for directing light alternatingly on the PN junctions to generate an alternating potential across the main terminals. AC electrical energy is generated without a DC to AC converter.
摘要:
Lateral FET structure is disclosed for bidirectional power switching, including AC application. Voltage blocking capability is substantially increased by a shielding electrode insulated between first and second gate electrodes in a notch between laterally spaced source regions and channel regions joined by a common drift region around the bottom of the notch. The shielding electrode prevents the electric field gradient toward the gate electrode on one side of the notch from inducing depletion in the drift region along the opposite side of the notch. This prevents unwanted inducement of conduction channels in the drift region during the OFF state of the FET. High density, high voltage, plural FET structure is disclosed.
摘要:
A solar cell (2) is provided for generating alternating current to drive an external load (18) in response to light radiation. A central region (4) of given conductivity type is disposed between said first and second regions (6) and (8) of intrinsic or invertable semiconductor material applied with AC gate drive (12). The light-generated hole-electron pairs alternately diffuse in opposite directions across the alternately induced pn junctions between the central region (4) and the first and second converted conductivity type intrinsic or invertable regions (6) and (8) to set up alternating potential gradients in opposite directions.
摘要:
MOMOM structural geometry and fabrication techniques are is disclosed. First and second metal layer strips (6 and 10) are supported on an insulating substrate (4) and have vertically overlapped portions sandwiched between insulating layers (8, 12). A generally vertical side (18) is defined through the layers to the substrate to expose vertical edges (20, 24) of the metal layers which are oxidized (32, 34) and covered by a third metal layer (44) extending therebetween. In the preferred embodiment, the middle insulating layer (8) is undercut (28), oxidized (36, 40), and filled with metallization (50), to provide a vertical rectilinear conduction path.