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Coplanar high fill factor pixel architecture

A pixel, imaging array technology, applied in the field of pixels

Active Publication Date: 2011-08-03
CARESTREAM HEALTH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pixel fill factor typically degrades with decreasing pixel pitch, and this degradation can be worse for smaller pixel sizes

Method used

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  • Coplanar high fill factor pixel architecture
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Embodiment Construction

[0040] Reference will now be made in detail to present embodiments (exemplary embodiments) of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

[0041] For purposes of simplicity and illustration, the principles of the invention will be described with primary reference to exemplary embodiments of the invention. However, one of ordinary skill in the art will readily recognize that the same principles are equally applicable to and can be implemented in a wide variety of reliable distributed environments, and that any such variations do not depart from the invention. True spirit and range. Furthermore, in the following detailed description, reference is made to the accompanying drawings that illustrate specific embodiments. Electrical, mechanical, logical and structural changes may be made to the embodiments without departing from ...

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Abstract

The present invention relates to a coplanar high fill factor pixel architecture. A pixel comprises a scan line proximate to a first surface of a substrate and a bias line between the first surface of the substrate and a first terminal of a photosensing element, where a portion of the bias line is substantially parallel to the scan line. The pixel can also comprise a switching element proximate to the first surface of the substrate and aligned with at least a portion of the scan line. The pixel can include the photosensing element proximate to the first surface of the substrate and aligned with at least a portion of the bias line.

Description

technical field [0001] The present invention relates to pixels used in imaging arrays. More particularly, the present invention relates to coplanar pixels with relatively high fill factors suitable for use in visible light and X-ray image sensing applications, which may include medical diagnostics, non- Destructive inspection, etc. Background technique [0002] Imaging arrays composed of a plurality of sensor pixels 100 are well known in the imaging field. The sensor pixel 100 generally includes a switching unit 110 such as a thin film transistor (TFT) and a photoelectric conversion unit 120 such as a photodiode. FIG. 1A shows a schematic equivalent pixel circuit for a sensor pixel 100 . The photoelectric conversion unit 120 is sensitive to incident radiation and can generate a large number of charge carriers, where the number depends on the radiation dose. In imaging arrays consisting of multiple pixels, photogenerated carriers are typically stored temporarily across th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/146
CPCH01L27/14603H01L31/022408H01L27/14609H01L27/14636H01L27/14659H01L27/14658H01L27/14612H01L27/14692
Inventor J·H·张T·J·特雷维尔G·N·海勒
Owner CARESTREAM HEALTH INC