Imager element, device and system with recessed transfer gate
AssigneeMicron Technology, Inc.
InventorsRichard A. Mauritzson, Inna Patrick
Life of this patent
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Abstract
An imager element, device and imaging system image sensor pixel. The image sensor pixel includes a collection region, a floating diffusion region, and a transfer transistor having a recessed gate. The recessed gate is configured to couple the collection region to the floating diffusion region so that collected charge is transferred during activation. The recessed gate has an effective gate length greater than the physical gate length.
Claims28
An image sensor pixel, comprising:
- a collection region;
- a floating diffusion region;
- and
- a transfer transistor including a recessed gate configured for coupling the collection region to the floating diffusion region to transfer collected charge when activated.
An image sensor element comprising a transfer transistor, including:
- a first source/drain region including a charge collection region for collecting charge generated by light;
- a second source/drain region including a floating diffusion region;
- and
- a gate configured for coupling the collection region to the floating diffusion region to transfer the collected charge when the gate is activated, the gate further including a longer effective gate length than the physical gate length.
An imaging device, comprising:
- a plurality of charge collection regions supported by a substrate;
- a corresponding plurality of floating diffusion regions;
- and
- a further corresponding plurality of transfer transistors including a corresponding plurality of recessed gates for transferring stored charge from the plurality of charge collection regions to the plurality of floating diffusion regions.
An electronic imager system, comprising:
- at least one input/output device;
- and
- an imaging device including a plurality of image sensor pixels, each image sensor pixel including a recessed transfer gate for transferring stored charge from a charge collection region to a floating diffusion region in the image sensor pixel.
Dependencies are inferred from the claim text.