摘要:
A novel Active Pixel Sensor (APS) cell structure and method of manufacture. Particularly, an image sensor APS cell having a predoped transfer gate is formed that avoids the variations of Vt as a result of subsequent manufacturing steps. According to the preferred embodiment of the invention, the image sensor APS cell structure includes a doped p-type pinning layer and an n-type doped gate. There is additionally provided a method of forming the image sensor APS cell having a predoped transfer gate and a doped pinning layer. The predoped transfer gate prevents part of the gate from becoming p-type doped.
摘要:
The present invention is a pixel sensor cell and method of making the same. The pixel sensor cell approximately doubles the available signal for a given quanta of light. The device of the present invention utilizes the holes produced by impinging photons in a pixel sensor cell circuit. A pixel sensor cell having reduced complexity includes an n-type collection well region formed beneath a surface of a substrate for collecting electrons generated by electromagnetic radiation impinging on the pixel sensor cell and a p-type collection well region formed beneath the surface of the substrate for collecting holes generated by the impinging photons. A circuit structure having a first input is coupled to the n-type collection well region and a second input is coupled to the p-type collection well region, wherein an output signal of the pixel sensor cell is the magnitude of the difference of a signal of the first input and a signal of the second input.
摘要:
Methods of fabricating a semiconductor structure including heterogeneous suicides or germanides located in different regions of a semiconductor structure are provided. The heterogeneous suicides or germanides are formed onto a semiconductor layer, a conductive layer or both. In accordance with the present invention, the inventive methods utilize a combination of sequential deposition of different metals and patterning to form different suicides or germanides in different regions of a semiconductor chip. The method includes providing a Si-containing or Ge layer having at least a first region and a second region; forming a first silicide or germanide on one of the first or second regions; and forming a second silicide or germanide that is compositionally different from the first silicide or germanide on the other region not including the first silicide or germanide, wherein the steps of forming the first and second suicides or germanides are performed sequentially or in a single step.
摘要:
A novel image sensor cell structure and method of manufacture. The imaging sensor comprises a substrate, a gate comprising a dielectric layer and gate conductor formed on the dielectric layer, a collection well layer of a first conductivity type formed below a surface of the substrate adjacent a first side of the gate conductor, a pinning layer of a second conductivity type formed atop the collection well at the substrate surface, and a diffusion region of a first conductivity type formed adjacent a second side of the gate conductor, the gate conductor forming a channel region between the collection well layer and the diffusion region. Part of the gate conductor bottom is recessed below the surface of the substrate. Preferably, a portion of the gate conductor is recessed at or below a bottom surface of the pinning layer to a depth such that the collection well intersects the channel region.
摘要:
Disclosed is a method of manufacturing dual orientation wafers. A trench is formed in a multi-layer wafer to a silicon substrate with a first crystalline orientation. The trench is filled with a silicon material (e.g., amorphous silicon or polysilicon trench). Isolation structures are formed to isolate the silicon material in the trench from a semiconductor layer with a second crystalline orientation. Additional isolation structures are formed within the silicon material in the trench and within the semiconductor layer. A patterned amorphization process is performed on the silicon material in the trench and followed by a recrystallization anneal such that the silicon material in the trench recrystallizes with the same crystalline orientation as the silicon substrate. The resulting structure is a semiconductor wafer with isolated semiconductor areas on the same plane having different crystalline orientations as well as isolated sections within each semiconductor area for device formation.
摘要:
A method of fabricating a complementary metal oxide semiconductor (CMOS) device, wherein the method comprises forming a first well region in a semiconductor substrate for accommodation of a first type semiconductor device; forming a second well region in the semiconductor substrate for accommodation of a second type semiconductor device; shielding the first type semiconductor device with a mask; depositing a first metal layer over the second type semiconductor device; performing a first salicide formation on the second type semiconductor device; removing the mask; depositing a second metal layer over the first and second type semiconductor devices; and performing a second salicide formation on the first type semiconductor device. The method requires only one pattern level and it eliminates pattern overlay as it also simplifies the processes to form different silicide material over different devices.
摘要:
CMOS image sensor pixel sensor cells, methods for fabricating the pixel sensor cells and design structures for fabricating the pixel sensor cells are designed to allow for back side illumination in global shutter mode by providing light shielding from back side illumination of at least one transistor within the pixel sensor cells. In a first particular generalized embodiment, a light shielding layer is located and formed interposed between a first semiconductor layer that includes a photoactive region and a second semiconductor layer that includes the at least a second transistor, or a floating diffusion, that is shielded by the light blocking layer. In a second generalized embodiment, a thin film transistor and a metal-insulator-metal capacitor are used in place of a floating diffusion, and located shielded in a dielectric isolated metallization stack over a carrier substrate.
摘要:
Disclosed is a method of manufacturing dual orientation wafers. A trench is formed in a multi-layer wafer to a silicon substrate with a first crystalline orientation. The trench is filled with a silicon material (e.g., amorphous silicon or polysilicon trench). Isolation structures are formed to isolate the silicon material in the trench from a semiconductor layer with a second crystalline orientation. Additional isolation structures are formed within the silicon material in the trench and within the semiconductor layer. A patterned amorphization process is performed on the silicon material in the trench and followed by a recrystallization anneal such that the silicon material in the trench recrystallizes with the same crystalline orientation as the silicon substrate. The resulting structure is a semiconductor wafer with isolated semiconductor areas on the same plane having different crystalline orientations as well as isolated sections within each semiconductor area for device formation.
摘要:
An imaging circuit, an imaging sensor, and a method of imaging. The imaging cell circuit including one or more imaging cell circuits, each imaging cell circuit comprising: a transistor having a floating body for holding charge generated in the floating body in response to exposure of the floating body to electromagnetic radiation; means for biasing the transistor wherein an output of the transistor is responsive to the electromagnetic radiation; and means for selectively connecting the floating body to a reset voltage supply.
摘要:
A pixel sensor cell having a semiconductor substrate having a surface; a photosensitive element formed in a substrate having a non-laterally disposed charge collection region entirely isolated from a physical boundary including the substrate surface. The photosensitive element comprises a trench having sidewalls formed in the substrate of a first conductivity type material; a first doped layer of a second conductivity type material formed adjacent to at least one of the sidewalls; and a second doped layer of the first conductivity type material formed between the first doped layer and the at least one trench sidewall and formed at a surface of the substrate, the second doped layer isolating the first doped layer from the at least one trench sidewall and the substrate surface. In a further embodiment, an additional photosensitive element is provided that includes a laterally disposed charge collection region that contacts the non-laterally disposed charge collection region of the photosensitive element and underlies the doped layer formed at the substrate surface.