摘要:
Planar and non-planar field effect transistors with extended-drain structures, and techniques to fabricate such structures. In an embodiment, a field plate electrode is disposed over an extended-drain, with a field plate dielectric there between. The field plate is disposed farther from the transistor drain than the transistor gate. In a further embodiment, an extended-drain transistor has source and drain contact metal at approximately twice a pitch, of the field plate and the source and/or drain contact metal. In a further embodiment, an isolation dielectric distinct from the gate dielectric is disposed between the extended-drain and the field plate. In a further embodiment, the field plate may be directly coupled to one or more of the transistor gate electrode or a dummy gate electrode without requiring upper level interconnection. In an embodiment, a deep well implant may be disposed between a lightly-doped extended-drain and a substrate to reduce drain-body junction capacitance and improve transistor performance.
摘要:
A semiconductor device (100) containing an extended drain MOS transistor (106) with an integrated snubber formed by forming a drain drift region (108) of the MOS transistor, forming a snubber capacitor including a capacitor dielectric layer (122) and capacitor plate (124) over the extended drain (108), and forming a snubber resistor (136) over a gate (114) of the MOS transistor so that the resistor is connected in series between the capacitor plate and a source (118) of the MOS transistor.
摘要:
An integrated circuit (100) includes an extended drain MOS transistor (102) with parallel alternating active gap drift regions and field gap drift regions. The extended drain MOS transistor includes a gate having field plates over the field gap drift regions. The extended drain MOS transistor may be formed in a symmetric nested configuration. A process for forming an integrated circuit containing an extended drain MOS transistor provides parallel alternating active gap drift regions and field gap drift regions with a gate having field plates over the field gap drift regions.
摘要:
Techniques are disclosed for forming transistor devices having source and drain regions with high concentrations of boron doped germanium. In some embodiments, an in situ boron doped germanium, or alternatively, boron doped silicon germanium capped with a heavily boron doped germanium layer, are provided using selective epitaxial deposition in the source and drain regions and their corresponding tip regions. In some such cases, germanium concentration can be, for example, in excess of 50 atomic % and up to 100 atomic %, and the boron concentration can be, for instance, in excess of 1E20 cm -3 . A buffer providing graded germanium and/or boron concentrations can be used to better interface disparate layers. The concentration of boron doped in the germanium at the epi-metal interface effectively lowers parasitic resistance without degrading tip abruptness. The techniques can be embodied, for instance, in planar or non-planar transistor devices.
摘要:
A transistor includes a source region including a first impurity region implanted into a substrate, a drain region including a second impurity region implanted into the substrate, and a gate including an oxide layer formed over the substrate and a conductive material formed over the oxide layer, the oxide layer comprising a first side and a second side, the first side formed over a portion of the first impurity region and the second side formed over a portion of the second impurity region, the first side having a thickness of less than about 100A, and the second side having a thickness equal to or greater than 125A.
摘要:
An N type lateral double diffused metal oxide semiconductor (NLDMOS) device comprises a floating P type structure (115), a first field oxide region (107), a second field oxide region (109) and an N type drift region (113), wherein the first field oxide region (107) and the second field oxide region (109) are disposed on the N type drift region (113); the floating P type structure (115) is located in the middle portion of the N type drift region (113); the first field oxide region (107) and the second field oxide region (109) are not connected together; and width of active region between the first field oxide region (107) and the second field oxide region (109) matches with length of the injected floating P type structure (115). By employing the construction of the NLDMOS, not only the breakdown voltage of semiconductor device can be raised, but also on-resistance can be effectively lowered. Meanwhile, the requirements of high-energy injection are lowered and the limitation to processing machine is decreased, making the manufacturing easier to be carried out.