Abstract:
A semiconductor device includes a substrate and a first contact layer on the substrate. The semiconductor device includes a channel layer on the first contact layer and a barrier layer on the channel layer. The semiconductor device includes a gate electrode on at least one side surface of the barrier layer and a second contact layer on the channel layer. The semiconductor device includes a first electrode on the first contact layer and a second electrode on the second contact layer.
Abstract:
In described examples, a semiconductor device (100) includes a split-gate lateral extended drain MOS transistor (108), which includes a first gate (128) and a second gate (130) laterally adjacent to the first gate (128). The first gate (128) is laterally separated from the second gate (130) by a gap (132) of 10 nanometers to 250 nanometers. The first gate (128) extends at least partially over a body (110), and the second gate (130) extends at least partially over a drain drift region (116). The drain drift region (116) abuts the body (110) at a top surface (112) of the substrate (102). A boundary between the drain drift region (116) and the body (110) at the top surface (112) of the substrate (102) is located under at least one of the first gate (128), the second gate (130) and the gap (132) between the first gate (128) and the second gate (130). The second gate (130) may be coupled to a gate bias voltage node or a gate signal node.
Abstract:
Monolithic FETs including a channel region of a first semiconductor material disposed over a substrate. While a mask, such as a gate stack or sacrificial gate stack, is covering the channel region, an impurity-doped compositionally graded semiconductor is grown, for example on at least a drain end of the channel region to introduce a carrier-blocking conduction band offset and/or a wider band gap within the drain region of the transistor. In some embodiments, the compositional grade induces a carrier-blocking band offset of at least 0.25 eV. The wider band gap and/or band offset contributes to a reduced gate induced drain leakage (GIDL). The impurity-doped semiconductor may be compositionally graded back down from the retrograded composition to a suitably narrow band gap material providing good ohmic contact. In some embodiments, the impurity-doped compositionally graded semiconductor growth is integrated into a gate-last, source/drain regrowth finFET fabrication process.
Abstract:
A method comprising: • growing a layer of channel material (1101), preferably graphene, on a growth wafer (1112) to form a channel member, the growth wafer comprising a layer of catalyst material (1111) separated from a carrier wafer (1112) by a layer of release material (1113), the catalyst material serving as a seed layer for growing the layer of channel material; • depositing a layer of polymeric material (1102) over the formed channel member to form a supporting substrate for the layers of catalyst and channel material; • etching the layer of release material (1113) to remove the release material (1113) and carrier wafer (1112); and • patterning the layer of catalyst material (1111) to form source and drain electrodes (1116) configured to enable a flow of electrical current through the channel member.
Abstract:
The present subject matter relates to an electrical programmable read only memory (EPROM) cell. The EPROM cell comprises a semiconductor substrate and a floating gate separated from the semiconductor substrate by a first dielectric layer. A control gate is capacitively coupled to the floating gate through a second dielectric layer disposed between the floating gate and the control gate. In an example, the EPROM cell further comprises a conductive gate connected to the floating gate, wherein the conductive gate is to leak charges from the floating gate in a predetermined leak time period.
Abstract:
A semiconductor device includes a first oxide insulating layer over a first insulating layer, an oxide semiconductor layer over the first oxide insulating layer, a source electrode layer and a drain electrode layer over the oxide semiconductor layer, a second insulating layer over the source electrode layer and the drain electrode layer, a second oxide insulating layer over the oxide semiconductor layer, a gate insulating layer over the second oxide insulating layer, a gate electrode layer over the gate insulating layer, and a third insulating layer over the second insulating layer, the second oxide insulating layer, the gate insulating layer, and the gate electrode layer. A side surface portion of the second insulating layer is in contact with the second oxide insulating layer. The gate electrode layer includes a first region and a second region. The first region has a width larger than that of the second region.