摘要:
A laterally diffused metal oxide semiconductor (LDMOS) transistor structure with improved unclamped inductive switching immunity. The LDMOS includes a substrate and an adjacent epitaxial layer both of a first conductivity type. A gate structure is above the epitaxial layer. A drain region and a source region, both of a second conductivity type, are within the epitaxial layer. A channel is formed between the source and drain region and arranged below the gate structure. A body structure of the first conductivity type is at least partially formed under the gate structure and extends laterally under the source region, wherein the epitaxial layer is less doped than the body structure. A conductive trench-like feed-through element passes through the epitaxial layer and contacts the substrate and the source region. The LDMOS includes a tub region of the first conductivity type formed under the source region, and adjacent laterally to and in contact with said body structure and said trench-like feed-through element.
摘要:
A semiconductor device may include the following elements: a first doped portion; a second doped portion; an enclosing member, which encloses both the first doped portion and the second doped portion; a first barrier, which directly contacts the first doped portion; a second barrier, which directly contacts the second doped portion; a dielectric member, which is positioned between the first barrier and the second barrier and directly contacts each of the first barrier and the second barrier; a third barrier, which directly contacts the first doped portion; and a device component, wherein a portion of the device component is positioned between the dielectric member and the third barrier.
摘要:
An integrated circuit containing an extended drain MOS transistor which has a drift layer, an upper RESURF layer over and contacting an upper surface of the drift layer, and a buried drain extension below the drift layer which is electrically connected to the drift layer at the drain end and separated from the drift layer at the channel end. A lower RESURF layer may be formed between the drift layer and the buried drain extension at the channel end. Any of the upper RESURF layer, the drift layer, the lower RESURF layer and the buried drain extension may have a graded doping density from the drain end to the channel end. A process of forming an integrated circuit containing an extended drain MOS transistor which has the drift layer, the upper RESURF layer, and the buried drain extension.
摘要:
Semiconductor devices are provided. The semiconductor devices may include a substrate and a transistor on the substrate. The semiconductor devices may include a first guard ring of first conductivity type in the substrate adjacent the transistor. The semiconductor devices may include a second guard ring of second conductivity type opposite the first conductivity type in the substrate adjacent the first guard ring. Related semiconductor systems are also provided.
摘要:
A radio frequency LDMOS device, wherein the drift region includes a first injection region and a second injection region; the first injection region situated between a second lateral surface of a polysilicon gate and a second lateral surface of a first Faraday shielding layer; the second injection region situated between the second lateral surface of the first Faraday shielding layer and the drain region and encloses the drain region; the second lateral surface of the second Faraday shielding layer is a surface of a side near the drain region, the maximum electric field strength of the drift region on the bottom of the second lateral surface of the second Faraday shielding layer is regulated via regulation of the doping concentration of the second injection region; the doping concentration of the first injection region is higher than the second injection region.
摘要:
A vertical super junction MOSFET and a lateral MOSFET are integrated on the same semiconductor substrate. The lateral MOSFET is electrically isolated from the vertical super junction MOSFET by an n-buried isolating layer and an n-diffused isolating layer. The lateral MOSFET is formed of a p-well region formed in an n−semiconductor layer bounded by the n-buried isolating layer and n-diffused isolating layer, an n-source region and n-drain region formed in the p-well region, and a gate electrode that covers a portion of the p-well region sandwiched by the n-source region and n-drain region. As the n-buried isolating layer is formed at the same time as an n-layer (3) of the vertical super junction MOSFET, it is possible to reduce cost. Also, it is possible to suppress parasitic action between the elements with the n-buried isolating layer.
摘要:
A MOS transistor device includes a substrate including a gate formed thereon, and a spacer being formed on a sidewall of the gate; a source region and a drain region formed in the substrate; and at least a first dummy contact formed above the substrate on a drain side of the gate. More important, the first dummy contact is formed apart from a surface of the substrate.
摘要:
A gate-all around fin double diffused metal oxide semiconductor (DMOS) devices and methods of manufacture are disclosed. The method includes forming a plurality of fin structures from a substrate. The method further includes forming a well of a first conductivity type and a second conductivity type within the substrate and corresponding fin structures of the plurality of fin structures. The method further includes forming a source contact on an exposed portion of a first fin structure. The method further comprises forming drain contacts on exposed portions of adjacent fin structures to the first fin structure. The method further includes forming a gate structure in a dielectric fill material about the first fin structure and extending over the well of the first conductivity type.
摘要:
A semiconductor device includes a first semiconductor layer of a first conductivity type, and a second semiconductor layer of a second conductivity type provided on part of the first semiconductor layer in each of a first region and a second region separated from each other. A first distance is a distance between both ends of the first insulating film in a direction connecting the fourth semiconductor layer and the sixth semiconductor layer. The first distance in the first region is longer than the first distance in the second region. A second distance is a distance between the third semiconductor layer and the seventh semiconductor layer. The second distance in the first region is longer than the second distance in the second region.
摘要:
A first transistor includes a first impurity layer of a first conduction type formed in a first region of a semiconductor substrate, a first epitaxial semiconductor layer formed above the first impurity layer, a first gate insulating film formed above the first epitaxial semiconductor layer, a first gate electrode formed above the first gate insulating film, and first source/drain regions of a second conduction type formed in the first epitaxial semiconductor layer and in the semiconductor substrate in the first region. A second transistor includes a second impurity layer of the first conduction type formed in a second region of the semiconductor substrate, a second epitaxial semiconductor layer formed above the second impurity layer and being thinner than the first epitaxial semiconductor layer, a second gate insulating film formed above the second epitaxial semiconductor layer, a second gate electrode formed above the second gate insulating film, and second source/drain regions of the second conduction type formed in the second epitaxial semiconductor layer and in the semiconductor substrate in the second region.