11 results about "Doping profile" patented technology

This invention provides an image sensor, a pixel structure, and a method for manufacturing the same. The pixel structure includes a photoelectric conversion region disposed in a semiconductor substrate and a conductive plate disposed above it. The conductive plate covers a first region of the photoelectric conversion region and induces a hole accumulation layer on its surface by receiving a bias signal, achieving electrical pinning. A doped pinning layer is disposed in a second region outside the projection range of the conductive plate, achieving physical pinning, wherein the doping concentration of the surface doping profile of the first region is lower than that of the second region. Through the synergistic effect of electric field modulation and doping modulation, a stable potential distribution is formed on the surface of the photoelectric conversion region, effectively suppressing dark current. Because high-concentration doping is avoided in the first region, the impact of doping compensation on the potential well is reduced, thereby maintaining a large charge storage space even under pixel miniaturization conditions, improving the full-well capacity and the dynamic range and signal-to-noise ratio of the image sensor.

This technology includes a vertical cell array transistor (VCAAT) with improved floating body effect. The array includes one or more bit lines arranged in a first horizontal direction and one or more word lines arranged in a second horizontal direction. The array includes one or more channels extending vertically substantially orthogonal to the first and second horizontal directions such that the bit lines intersect the source / drain regions of the multiple channels and the word lines intersect the gate regions of the multiple channels. The array includes a case where the source / drain region has a first section adjacent to the source / drain junction and a second section adjacent to the channel body, and the first section has a higher doping concentration than the second section.

This utility model discloses a tunneling oxide passivation contact structure for a solar cell and a solar cell. The tunneling oxide passivation contact structure includes a substrate having a light-incident surface and a back-light surface disposed opposite to each other. The back-light surface is provided with, from the side closest to the substrate to the side furthest from the substrate, a first tunneling oxide layer, a lightly doped layer, a heavily doped carbon-doped layer, a second tunneling oxide layer, and a heavily doped undoped carbon layer. The total thickness of the heavily doped carbon-doped layer and the heavily doped undoped carbon layer is 30-140 nm. This utility model provides a tunneling oxide passivation contact structure for a solar cell. By setting a distributed doping structure of lightly doped layer / heavily doped carbon-doped layer / second tunneling oxide layer / heavily doped undoped carbon layer, it optimizes carrier transport and interface passivation, improves contact stability and resistance to silver ion erosion, and has advantages such as controllable doping profile and strong process compatibility, significantly improving cell performance.

Techniques are provided herein for forming thin film transistor structures having co-doped semiconductor regions. The addition of insulating dopants can be used to improve the performance, stability, and reliability of the TFT. A given TFT structure within an array of similar TFT structures formed in an interconnect region may include a semiconductor region that is co-doped with one or more additional elements. The doping profile can be tuned to optimize performance, stability, and reliability of the TFT structure. In some embodiments, the doping profile causes an overall reduction in the conductivity of the semiconductor region, leading to a higher threshold voltage. Designing access devices (in, for example, a DRAM architecture) with higher threshold voltages can be beneficial for improving reliability of the memory cell.

The application discloses a kind of multi-dimensional doped profile optimization type ultra-thin body MOSFET device and preparation process thereof, belong to semiconductor device technical field, including by a plurality of mutually juxtaposed MOS cell is formed, single MOS cell includes drain, semiconductor epitaxial layer, source and gate;The semiconductor epitaxial layer includes N substrate layer, N drift layer, P+ layer, N well layer and P well layer, the middle of N drift layer of single MOS cell is equipped with lightly doped N layer, the inside of single MOS cell and located N drift layer left and right sides are equipped with side symmetry P- layer, the side symmetry P- layer is rectangular profile, and the top of side symmetry P- layer is in contact with the gate;In embodiment one, side symmetry P- layer and N drift layer form PN junction, produce lateral depletion region when reverse bias, expand lateral electric field range, avoid local electric field concentration.

A light sensitive semiconductor structure comprises:a substrate;a doped upper region of said substrate having a first type of doping;a first implant region located below and being in direct contact with said doped upper region, said first implant region having a second type of doping so that a pn-junction is located between said doped upper region and said first implant region; anda second implant region located below said first implant region and having said second type of doping, and wherein a peak in a doping profile of said second type of doping is located in said second implant region.

A pixel cell includes a photodiode disposed in a semiconductor material. A floating diffusion is disposed in the semiconductor material. A transfer gate includes a vertical transfer gate structure disposed in the semiconductor material between the photodiode and the floating diffusion. The transfer gate is coupled between the photodiode and the floating diffusion. A passivation layer is disposed in the semiconductor material and proximate to the vertical transfer gate. The passivation layer has a region with a non-uniformly distributed doping profile proximate to the vertical gate structure such that a first doping concentration of the region in the passivation layer proximate to the vertical gate structure along a first direction is less than a second doping concentration of the region in the passivation layer proximate to the vertical gate structure along a second direction.

A vertical semiconductor transistor is provided that includes: a source region, a drain region, and a body region formed in a semiconductor substrate; wherein the source region and the drain region are doped with a first type dopant; wherein the body region is doped with a second type dopant; and wherein the second type dopant has a doping profile within the body region that varies with distance from the source region.

A method for fabricating a semiconductor device includes exposing one or more surfaces of a conduction channel of a transistor; overlaying the one or more surfaces with a dielectric interfacial layer; overlaying the dielectric interfacial layer with a blocking layer; performing a first annealing process to densify the dielectric interfacial layer; overlaying the blocking layer with a first high-k dielectric layer; forming one or more threshold voltage modulation layers over the first high-k dielectric layer; performing a second annealing process to adjust a doping profile of the first high-k dielectric layer; and overlaying the first high-k dielectric layer with a second high-k dielectric layer.

This disclosure relates to a method for fabricating a selective emitter, a solar cell, and the same method. The method for fabricating a selective emitter includes: providing a substrate; performing ion diffusion treatment on the substrate to form a doped inner layer extending from the substrate surface into the substrate and a rich-doped layer covering the doped inner layer; laser-treating a non-metallic contact region using a continuous infrared laser to push the dopant element in the rich-doped layer into the substrate, such that the thickness of the doped inner layer in the non-metallic contact region is greater than the thickness of the doped inner layer in the metallic contact region; using the rich-doped layer in the metallic contact region as a barrier layer, etching the substrate to partially or completely remove the doped inner layer in the non-metallic contact region, so that the doping concentration in the non-metallic contact region is less than the doping concentration in the metallic contact region. In this way, the doping profile of the non-metallic contact region can be precisely controlled, and a specific selective emitter can be fabricated.

A light sensitive semiconductor structure comprises:a substrate;a doped upper region of said substrate having a first type of doping;a first implant region located below and being in direct contact with said doped upper region, said first implant region having a second type of doping so that a pn-junction is located between said doped upper region and said first implant region; anda second implant region located below said first implant region and having said second type of doping, and wherein a peak in a doping profile of said second type of doping is located in said second implant region.