摘要:
A method and system for delineating document boundaries and identifying document types by analyzing digital images of one or more documents, automatically categorizing one or more pages or subdocuments within the one or more documents and automatically generating delineation identifiers, such as computer-generated images of separation pages inserted between digital images belonging to different categories, a description of the categorization sequence of the digital images, or a computer-generated electronic label affixed or associated with said digital images.
摘要:
A process may include providing heat from one or more heaters to at least a portion of a subsurface formation. Heat may transfer from one or more heaters to a part of a formation. In some embodiments, heat from the one or more heat sources may pyrolyze at least some hydrocarbons in a part of a subsurface formation. Hydrocarbons and/or other products may be produced from a subsurface formation. Certain embodiments describe apparatus, methods, and/or processes used in treating a subsurface or hydrocarbon containing formation.
摘要:
The invention relates to a method for selective etching of SiC, the etching being carried out by applying a positive potential to a layer (3; 8) of p-type SiC being in contact with an etching solution containing fluorine ions and having an oxidising effect on SiC. The invention also relates to a method for producing a SiC micro structure having free hanging parts (i.e. diaphragm, cantilever or beam) on a SiC-substrate, a method for producing a MEMS device of SiC having a free hanging structure, and a method for producing a piezo-resistive pressure sensor comprising the step of applying a positive potential to a layer (8) of p-type SiC being in contact with an etching solution containing fluorine ions and having an oxidising effect on SiC.
摘要:
A transistor of SiC having a drain and a highly doped substrate layer is formed on the drain. A highly n type buffer layer may optionally be formed on the substrate layer. A low doped n-type drift layer, a p-type base layer, a high doped n-type source region layer and a source are formed on the substrate layer. An insulating layer with a gate electrode is arranged on top of the base layer and extends substantially laterally from at least the source region layer to a n-type layer. When a voltage is applied to the gate electrode, a conducting inversion channel is formed extending substantially laterally in the base layer at an interface of the p-type base layer and the insulating layer. The p-type base layer is low doped in a region next to the interface to the insulating layer at which the inversion channel is formed and highly doped in a region thereunder next to the drift layer.
摘要:
A lateral field effect transistor of SiC for high switching frequencies comprises a source region layer (5) and a drain region layer (6) laterally spaced and highly doped n-type, an n-type channel layer (4) extending laterally and interconnecting the source region layer and the drain region layer for conducting a current between these layers in the on-state of the transistor, and a gate electrode (9) arranged to control the channel layer to be conducting or blocking through varying the potential applied to the gate electrode. A highly doped p-type base layer (12) is arranged next to the channel layer at least partially overlapping the gate electrode and being at a lateral distance to the drain region layer. The base layer is shorted to the source region layer.
摘要:
A method for introducing an impurity dopant into a semiconductor layer of SiC is provided. Ions are implanted into the semiconductor layer so that a near surface of the semiconductor layer becomes doped and amorphous. The semiconductor layer is then annealed at a temperature so that the dopant diffuses into a non-implanted sublayer of the semiconductor layer below the near surface layer.
摘要:
A semiconductor device of SiC is adapted to hold high voltages in the blocking state thereof. The device comprises two parts (1, 2) each comprising one or more semiconductor layers of SiC and connected in series between two opposite terminals of the device, namely a sub-semiconductor device (1) able to withstand only low voltages in the blocking state thereof and a voltage-limiting part (2) able to withstand high voltages in the blocking state of the device and adapted to protect said sub-semiconductor device by taking a major part of the voltage over the device in the blocking state thereof.
摘要:
A sling device for surgical implantation into human recipient to support the urethra, the sling including an elongated strip of supple material. The elongated strip has a center portion, opposite first and second side portions, and a slot passing through the center portion, through which one of the side portions can pass, thereby forming a loop in the elongated strip. The material is a biological acceptable material for implantation into the human recipient, preferably selected from the group consisting of synthetic polymers, processed animal tissues, and combination thereof. A method of reducing the incidence of involuntary urination or restoring urinary continence in an incontinent human subject is also disclosed, including the steps of providing a sling device of the type previously described and surgically implanting the sling device in the human subject so that the urethra is biased upward so as to elevate the urethra.
摘要:
A semiconductor device comprises a semiconductor layer of SiC and an insulating layer thereon for insulating the SiC layer with respect to a metal plate constituting a gate and connectable to a voltage for creating a conducting surface channel at a SiC layer-insulating layer interface, wherein at least a portion of the insulating layer closest to the interface is made of a crystalline material which is substantially lattice-matched to SiC and has substantially the same coefficient of thermal expansion as SiC; and wherein the material has AlN as the only component or as a major component of an alloy with insulating properties.