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A double-sided image sensor

An image sensor and double-sided technology, which is applied in the design field of double-sided image sensors, can solve the problems of limiting the application range of sensors and inability to sense, and achieve the effect of ensuring thinness, ensuring the ability to receive light, and avoiding occlusion

Inactive Publication Date: 2019-04-09
山东华芯电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sensor can only sense the light on the front side, but not the light on the back side, which limits the application range of the sensor

Method used

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  • A double-sided image sensor
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  • A double-sided image sensor

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0027] see figure 2 , a double-sided image sensor 2 comprising:

[0028] A first substrate 21a, which may be a silicon substrate, on which electronic components (light receiving regions) are formed, the first substrate 21a includes a front surface having a first light receiving region 22a and a rear surface opposite to the front surface ;

[0029] The groove 25 on the back side of the first substrate 21a, the depth of the groove 25 is less than or equal to half the thickness of the first substrate, and the bottom of the groove 25 should be far away from the first light receiving area 22a;

[0030] The second substrate 21b fixed on the bottom of the groove 25, the second substrate 21b includes a front with a second light receiving area 22b and a back opposite to the front, the front of the second substrate 21b coplanar with the back surface of the first substrate 21a.

[0031] On the front side of the first substrate 21a, there is a first infrared filter 24a bonded by a fi...

no. 2 example

[0040] see image 3 , a double-sided image sensor 3 comprising:

[0041] A first substrate 21a, which may be a silicon substrate, on which electronic components (light receiving regions) are formed, the first substrate 21a includes a front surface having a first light receiving region 22a and a rear surface opposite to the front surface ;

[0042] The groove 25 on the back side of the first substrate 21a, the depth of the groove 25 is less than or equal to half the thickness of the first substrate, and the bottom of the groove 25 should be far away from the first light receiving area 22a;

[0043] The second substrate 21b fixed on the bottom of the groove 25, the second substrate 21b includes a front with a second light receiving area 22b and a back opposite to the front, the front of the second substrate 21b coplanar with the back surface of the first substrate 21a.

[0044] On the front side of the first substrate 21a, there is a first infrared filter 24a bonded by a fir...

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Abstract

The invention provides a double-sided image sensor. The double-sided image sensor includes a first substrate which includes a front side having a first light receiving area and a reverse side opposite to the front side; a groove in the reverse side of the first substrate, the depth of the groove being smaller than or equal to half of the thickness of the first substrate; and a second substrate fixed in the groove, the second substrate including a front side having a second light receiving area and a reverse side opposite to the front side, and the front side of the second substrate and the reverse side of the first substrate being coplanar.

Description

technical field [0001] The invention relates to the sensor field of sensitive components, in particular to the design of a double-sided image sensor. Background technique [0002] The simplest electronic device in the photosensitive sensor is the photoresistor, which can sense the light and dark changes of the light, output a weak electrical signal, and control the automatic switch of the LED lamp through simple electronic circuit amplification. Therefore, it is widely used in automatic control and household appliances. For remote lighting fixtures, such as: automatic brightness adjustment in TVs, automatic exposure in cameras; Stop device and anti-theft alarm device Medium [0003] Photosensitive sensor is one of the most common sensors. It has a wide variety, mainly including: photocell, photomultiplier tube, photoresistor, phototransistor, solar cell, infrared sensor, ultraviolet sensor, fiber optic photoelectric sensor, color sensor, CCD and CMOS image sensor, etc. Ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/146
CPCH01L27/14607H01L27/14625H01L27/14636
Inventor 王汉清
Owner 山东华芯电子有限公司
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