Abstract:
The present invention provides a lateral IGBT transistor comprising a bipolar transistor and an IGFET. The lateral IGBT comprises a low resistive connection between the drain of the IGFET and the base of the bipolar transistor, and an isolating layer arranged between the IGFET and the bipolar transistor. The novel structure provides a device which is immune to latch and gives high gain and reliability. The structure can be realized with standard CMOS technology available at foundries.
Abstract:
A semiconductor device and methods for forming the same are described, wherein the device comprises a bipolar transistor having a base region, an emitter region and a collector region, wherein the base region comprises polycrystalline semiconductor material formed by crystallizing silicon, germanium or silicon germanium in contact with a silicide, germanide or silicide germanide. The emitter region and collector region also may include polycrystalline semiconductor material formed by crystallizing silicon, germanium or silicon germanium in contact with a silicide, germanide or silicide germanide forming metal. The polycrystalline semiconductor material is preferably silicided polysilicon, which is formed in contact with C49 phase titanium suicide.
Abstract:
An ESD protection device comprises a first region (120) of the first conductivity type formed in a semiconductor layer (118) of the first conductivity type, the first region (120) extending from a surface (132) of the semiconductor layer and coupled to a first electrode a well region (128) of a second conductivity type formed extending from the surface (132) of the semiconductor layer, and a second region (122) of the second conductivity type formed in the well region (128) and coupled to a second electrode (B). The device further comprises a floating region (130) of the second conductivity type formed between the first electrode (C) and the well region (128), extending from the surface (132) of the semiconductor layer and separated from the well region (128) by a distance (134), a value of which is such that the floating region is located within a depletion region of a PN junction (136) between the well region (128) and the semiconductor layer (118) when the device is active. The floating region (130) has a doping concentration such that it is not fully depleted when the device is active and the depth is such that a space charge region is modified near the PN junction (136).
Abstract:
In described examples of complementary high- voltage bipolar transistors (100) in silicon-on-insulator (SOI) integrated circuit, a collector region (104) is formed in an epitaxial silicon layer disposed over a buried insulator layer BOX (103). A base region (113) and an emitter (108) are disposed over the collector region (104). An n-type region (106) is formed under the BOX (103) by implanting donor impurity through the active region of substrate and BOX (103) into a p-substrate (101). Later in the process flow, this n-type region (106) is connected from the top by doped polysilicon plug (110) and is biased at Vcc. In this case, it will deplete lateral portion of PNP collector region and will increase its BV.
Abstract:
An apparatus includes an electrostatic discharge (ESD) protection device. In one embodiment, the protection device electrically coupled between a first node and a second node of an internal circuit to be protected from transient electrical events. The protection device includes a bipolar device or a silicon-controlled rectifier (SCR). The bipolar device or SCR can have a modified structure or additional circuitry to have a selected holding voltage and/or trigger voltage to provide protection over the internal circuit. The additional circuitry can include one or more resistors, one or more diodes, and/or a timer circuit to adjust the trigger and/or holding voltages of the bipolar device or SCR to a desired level. The protection device can provide protection over a transient voltage that ranges, for example, from about 100 V to 330V.