摘要:
The present invention provides, in one embodiment, a transistor (100). The transistor (100) comprises a doped semiconductor substrate (105) and a gate structure (110) over the semiconductor substrate (105), the gate structure (110) having a gate corner (125). The transistor (100) also includes a drain-extended well (115) surrounded by the doped semiconductor substrate (105). The drain-extended well (115) has an opposite dopant type as the doped semiconductor substrate (105). The drain-extended well (115) also has a low-doped region (145) between high-doped regions (150), wherein an edge of the low-doped region (155) is substantially coincident with a perimeter (140) defined by the gate corner (125). Other embodiments of the present invention include a method of manufacturing a transistor (200) and an integrated circuit (300).
摘要:
A semiconductor device (102) that includes a drain extended PMOS transistor (CT1a) is provided, as well as fabrication methods (202) therefore. In forming the PMOS transistor, a drain (124) of the transistor is formed over a region (125) of a p-type upper epitaxial layer (106), where the region (125) of the p-type upper epitaxial layer (106) is sandwiched between a left P-WELL region (130a) and a right P-WELL region (130b) formed within the p-type upper epitaxial layer (106). The p-type upper epitaxial layer (106) is formed over a semiconductor body (104) that has an n-buried layer (108) formed therein. This arrangement serves to increase the breakdown voltage (BVdss) of the drain extended PMOS transistor.
摘要:
An integrated circuit (IC) chip, mounted on a leadframe, has a network of power distribution lines deposited on the surface of the chip so that these lines are located over active components of the IC, connected vertically by metal-filled vias to selected active components below the lines, and also by conductors to segments of the leadframe. Furthermore, the lines are fabricated with a sheet resistance of less than 1.5 mΩ/· and the majority of the lines is patterned as straight lines between the vias and the conductors, respectively.
摘要:
High side extended-drain MOS driver transistors (T2) are presented in which an extended drain (108, 156) is separated from a first buried layer (120) by a second buried layer (130), wherein an internal or external diode (148) is coupled between the first buried layer (120) and the extended drain (108, 156) to increase the breakdown voltage.
摘要:
A transistor can be fabricated to exhibit reduced channel hot carrier effects. According to one aspect of the present invention, a method for fabricating a transistor structure includes implanting a first dopant into a lightly doped drain (LDD) region to form a shallow region therein. The first dopant penetrates the substrate to a depth that is less than the LDD junction depth. A second dopant is implanted into the substrate beyond the LDD junction depth to form a source/drain region. The implantation of the second dopant overpowers a substantial portion of the first dopant to define a floating ring in the LDD region that mitigates channel hot carrier effects.
摘要:
A CMOS integrated circuit (15A-B-C) includes both relatively low-power (124, 126) and high-power (132, 134) CMOS transistors on the same chip. A 20V, relatively high-power PMOS device (134) includes a heavily doped N-well drain region (70). A 20V, relatively high-power NMOS device (132) includes heavily doped P-type buried layers (76, 78) underneath the source (94) and drain regions (96) and spanning the gap between the P-well gate (90F) and adjacent P-well isolation regions (46, 50).
摘要:
The present invention provides a system for efficiently producing versatile, high-precision MOS device structures in which straight regions dominate the device's behavior, providing minimum geometry devices that precisely match large devices, in an easy, efficient and cost-effective manner. The present invention provides methods and apparatus for producing double diffused semiconductor devices that minimize performance impacts of end cap regions. The present invention provides a MOS structure having a moat region (404, 516, 616), and an oxide region (414, 512, 608) overlapping the moat region. A double-diffusion region (402, 504, 618) is formed within the oxide region, having end cap regions (406, 502, 620) that are effectively deactivated utilizing geometric and implant manipulations.
摘要:
A transistor can be fabricated to exhibit reduced channel hot carrier effects. According to one aspect of the present invention, a method for fabricating a transistor structure includes implanting a first dopant into a lightly doped drain (LDD) region to form a shallow region therein. The first dopant penetrates the substrate to a depth that is less than the LDD junction depth. A second dopant is implanted into the substrate beyond the LDD junction depth to form a source/drain region. The implantation of the second dopant overpowers a substantial portion of the first dopant to define a floating ring in the LDD region that mitigates channel hot carrier effects.
摘要:
The present invention provides a system for efficiently producing versatile, high-precision MOS device structures in which straight regions dominate the device's behavior, providing minimum geometry devices that precisely match large devices, in an easy, efficient and cost-effective manner. The present invention provides methods and apparatus for producing double diffused semiconductor devices that minimize performance impacts of end cap regions. The present invention provides a MOS structure having a moat region (404, 516, 616), and an oxide region (414, 512, 608) overlapping the moat region. A double-diffusion region (402, 504, 618) is formed within the oxide region, having end cap regions (406, 502, 620) that are effectively deactivated utilizing geometric and implant manipulations.
摘要:
An electrostatic discharge (ESD) device for protecting an input/output terminal of a circuit, the device comprising a first transistor with an integrated silicon-controlled rectifier (SCR) coupled between the input/output (I/O) terminal of the circuit and a node and a second transistor with an integrated silicon-controlled rectifier coupled between the node and a negative terminal of a supply voltage, wherein the silicon-controlled rectifier of the first transistor triggers in response to a negative ESD voltage and the silicon-controlled rectifier of the second transistor triggers in response to a positive ESD voltage.