摘要:
In a power FET composed of a substrate having upper and lower surfaces, the FET providing a current flow path between the upper and lower surfaces, and the FET having a plurality of drain regions extending to the substrate upper surface and an insulated gate electrode disposed on the upper surface, the improvement wherein said drain regions are disposed in a hexagonal lattice pattern, and said gate electrode comprises: a plurality of gate segments each covering a respective drain region; and a plurality of connecting segments each connecting together three of said gate segments.
摘要:
In a power FET composed of a substrate having upper and lower surfaces and having a semiconductor body of a first conductivity type, the body providing a current flow path between the upper and lower surfaces and having at least one body region which extends to said upper surface; and at least one base region extending into the substrate from the upper surface, the base region being of a second conductivity type opposite to the first conductivity type and having an upper portion located adjacent the upper surface of the substrate and a lower portion separated from the upper surface of the substrate by the upper portion, the upper portion defining a channel which is disposed in the current flow path adjacent the upper surface of the substrate, and the FET further having an insulated gate disposed at the upper surface above the body region, an impurity layer region extends into the channel from the upper surface of the substrate for giving the channel a lower impurity density than the lower portion of the base region.
摘要:
A monolithic semiconductor device comprises a VDMOS transistor having first and second main electrodes and a control electrode, and a lateral MOSFET having first and second main electrodes and a control electrode, wherein one of the first and second electrodes of the lateral MOSFET has a lower doping concentration than that of the first and second main electrodes of the VDMOS transistor for forming a Schottky barrier diode.
摘要:
A power MOS transistor, including source, drain, and gate electrodes, comprises a substrate of a semiconductor material of one conductivity type having first and second opposed surfaces; a drain region extending through the substrate between the surfaces; a plurality of spaced body regions of the opposite conductivity type extending into the substrate from the first surface; and a source region of the one conductivity type extending into the substrate from the first surface within each of the body regions, the interface of each of the source regions with its respective body region at the first surface being spaced from the interface of its respective body region and the drain region at the first surface to form a channel region therebetween. A gate electrode overlies and is insulated from the first surface and extends across the channel regions. A conductive electrode extends over and is insulated from the gate electrode, and contacts at least a portion of the source regions. A current limiting circuit is coupled between the conductive electrode and the gate electrode and a voltage limiting circuit is coupled between the drain electrode and the gate electrode.
摘要:
In a general aspect, a power device can include at least one N-type epitaxial layer disposed on a substrate and a plurality of N-pillars and P-pillars that define alternating P-N-pillars in the at least one N-type epitaxial layer. The power device can also include an active region and a termination region, where the termination region surrounds the active region. The alternating P-N-pillars can be disposed in both the active region and the termination region, where the termination region can include a predetermined number of floating P-pillars.
摘要:
A power device includes a semiconductor region which in turn includes a plurality of alternately arranged pillars of first and second conductivity type. Each of the plurality of pillars of second conductivity type further includes a plurality of implant regions of the second conductivity type arranged on top of one another along the depth of pillars of second conductivity type, and a trench portion filled with semiconductor material of the second conductivity type directly above the plurality of implant regions of second conductivity type.
摘要:
A method of forming a field effect transistor includes: forming a trench in a semiconductor region; forming a shield electrode in the trench; performing an angled sidewall implant of impurities of the first conductivity type to form a channel enhancement region adjacent the trench; forming a body region of a second conductivity type in the semiconductor region; and forming a source region of the first conductivity type in the body region, the source region and an interface between the body region and the semiconductor region defining a channel region therebetween, the channel region extending along the trench sidewall. The channel enhancement region partially extends into a lower portion of the channel region to thereby reduce a resistance of the channel region.