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Image sensor with high dynamic range

An image sensor, high dynamic range technology, applied in radiation control devices and other directions, can solve the problems of inability to collect optical signals, reduce the output image quality of the image sensor, and small dynamic range of linear photosensitive devices, and achieve low sensitivity, improve image quality, Sensitive effect

Active Publication Date: 2013-08-28
BEIJING SUPERPIX MICRO TECHNOLOGY CO LTD
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Problems solved by technology

[0004] The linear photosensitive device in the prior art cannot collect the optical signal above the high light intensity Esat1, and the image sensor using this type of photosensitive device cannot collect the image information of the high-light object; that is, the dynamic range of the linear photosensitive device is small, thereby reducing the image sensor. output image quality

Method used

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  • Image sensor with high dynamic range
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Embodiment Construction

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0018] In order to obtain high-quality images, the embodiment of the present invention starts with improving the photoelectric response properties of the image sensor, reducing the light transmittance of pixels under strong illumination, compressing the photoelectric response sensitivity curve of the photosensitive device in a high-light environment, and expanding the photosensitive light intensity range of the photosensitive device , so that the se...

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Abstract

The invention discloses an image sensor with a high dynamic range. The image sensor mainly comprises a photosensitive device placed inside a semiconductor substrate, colorless and transparent insulating media above the photosensitive device, isolating metal embedded in the insulating media, colorized optical filters and micro lenses, wherein the colorized optical filters and the micro lenses are sequentially arranged above the insulating media. Photochromic materials and corresponding catalysts are evenly added in a pre-set region of one insulating medium. The photochromic materials are used for producing black substances in a decomposing mode under the effect of light. The catalysts are used for reducing the black substances which are produced in the decomposing mode into the photochromic materials. By the adoption of the image sensor, output image quality is improved.

Description

technical field [0001] The invention relates to the field of semiconductor manufacturing, in particular to an image sensor with a high dynamic range. Background technique [0002] Image sensors have been widely used in digital cameras, mobile phones, medical devices, automobiles and other applications. In particular, the rapid development of image sensor manufacturing technology has made people have higher requirements for the output image quality of the image sensor. [0003] In the prior art, image sensors generally adopt structures such as figure 1 shown. 101 is an insulating medium, 102 is a photosensitive device fabricated in a semiconductor substrate, 103 is an isolation metal embedded in an insulating medium, 104 is a color filter, and 105 is a microlens. figure 1 In the above, the light incident from the top of the microlens 105 passes through the microlens 105, the color filter 104 and the colorless and transparent insulating medium 101 in sequence and is absorbe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/146
Inventor 郭同辉唐冕陈杰刘志碧旷章曲
Owner BEIJING SUPERPIX MICRO TECHNOLOGY CO LTD
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