摘要:
A semiconductor device comprising a first transistor device on or in a semiconductor substrate and a second transistor device on or in the substrate. The device further comprises an insulating trench located between the first transistor device and the second transistor device. At least one upper corner of the insulating trench is a rounded corner in a lateral plane of the substrate.
摘要:
Double diffused MOS (DMOS) transistors feature extended drain regions to provide depletion regions which drop high drain voltages to lower voltages at the gate edges. DMOS transistors exhibit lower drain breakdown potential in the on-state than in the off-state than in the off-state due to snapback by a parasitic bipolar transistor that exists in parallel with the DMOS transistor. The instant invention is a cascoded DMOS transistor in an integrated circuit incorporating an NMOS transistor on the DMOS source node to reverse bias the parasitic emitter-base junction during on-state operation, eliminating snapback. The NMOS transistor may be integrated with the DMOS transistor by connections in the interconnect system of the integrated circuit, or the NMOS transistor and DMOS transistor may be fabricated in a common p-type well and integrated in the IC substrate. Methods of fabricating an integrated circuit with the incentive cascoded DMOS transistor are also disclosed.
摘要:
The present invention provides an integrated circuit and a method of manufacture therefore. The integrated circuit (100, 1000), in one embodiment without limitation, includes a dielectric layer (120, 1020) located over a wafer substrate (110, 1010), and a semiconductor substrate (130, 1030) located over the dielectric layer (120, 1020), the semiconductor substrate (130, 1030) having one or more transistor devices (140, 1040) located therein or thereon. The integrated circuit (100, 1000) may further include an interconnect (170, 1053) extending entirely through the semiconductor substrate (130, 1030) and the dielectric layer (120, 1020), thereby electrically contacting the wafer substrate (110, 1010).
摘要:
Segmented power transistors and fabrication methods are disclosed in which transistor segments are spaced from one another to facilitate thermal diffusion, and in which other electrical devices can be formed in the spaces between transistor segments.
摘要:
An improved n-channel integrated lateral DMOS (10) in which a buried body region (30), beneath and self-aligned to the source (18) and normal body diffusions, provides a low impedance path for holes emitted at the drain region (16). This greatly reduces secondary electron generation, and accordingly reduces the gain of the parasitic PNP bipolar device. The reduced regeneration in turn raises the critical field value, and hence the safe operating area.
摘要:
Segmented power transistors and fabrication methods are disclosed in which transistor segments are spaced from one another to facilitate thermal diffusion, and in which other electrical devices can be formed in the spaces between transistor segments.
摘要:
A new diode structure is provided by bonding two semiconductor materials together having a low capacitance, a large contact area and mechanical ruggedness. The cross-sectional area of at least one of the semiconductor materials is reduced in the region of the bond resulting in a structure with either an hourglass or truncated hourglass-like cross-section. A diode PN junction is contained in the neighborhood of the area of reduced cross section. The diode so constructed provides a sufficient spacing between the unbonded semiconductor regions to reduce total packaged diode capacitance without introducing a spacer layer. The diode is processed to limit the area of the PN junction formed therein to the region of the bonding between the semiconductor materials, without limiting the metallized contact area, further controlling the diode capacitance as well as other electrical characteristics. The outer ends of the diode parallel to the bond, comprising typically P and N type semiconductor regions, are typically connected to metal leads which comprise the diode leads and the diode is packaged to form a mechanically and electrically stable low capacitance diode. This diode can be encapsulated such that no void or cavity exists within the interior of the structure without changing the diode construction process.
摘要:
A bipolar junction structure comprising a Schottky barrier rectifying contact juxtaposed to a p-n junction having the distribution of p+ diffusions common to a guard ring structure on the Schottky barrier area.
摘要:
A transistor in which this effective emitter resistance which is determined by the geometry of the emitter metallization as disclosed. In the preferred embodiment, the emitter metallization comprises a series of circular "dots" which are distributed over the entire emitter area. The area of the "dots" with respect to the entire emitter area is selected such that the desired effective emitter resistance is achieved.
摘要:
A method for the nondestructive testing of voltage limiting blocks includes the steps of providing several discrete electrical contacts across the block, sequentially applying to each of the contacts a voltage to determine the corresponding current and utilizing the current and voltage values to determine constants related to the microstructure of that particular location. The constants can then be utilized to derive a contour map which will be indicative of a hot spot in such block as determined by a maxima of the contour map.