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Pixel array layout method and metal wire structure for focal plane read-out circuit

A technology of pixel array and readout circuit, applied in circuits, electrical components, electrical solid devices, etc., can solve the problems of complex wiring, asymmetry between odd-row pixels and even-row pixels, etc., to achieve simple wiring and high area utilization. Effect

Inactive Publication Date: 2004-09-01
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this way there are still output lines with Col i (O) Intersection leads to complex routing and at the same time makes odd-row pixels and even-row pixels asymmetric

Method used

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  • Pixel array layout method and metal wire structure for focal plane read-out circuit
  • Pixel array layout method and metal wire structure for focal plane read-out circuit
  • Pixel array layout method and metal wire structure for focal plane read-out circuit

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Embodiment

[0031] The size of each pixel is 30μ×30μ, and the pixel includes an integral control transistor Mint, a row selection switch Msw, a detection tube Mtest and a capacitor Mc realized by using a MOS tube. Among them, the size of Mint, Msw, and Mtest is not large, and in order to improve the charge storage capacity, the larger the better, the Mc will occupy about 2 / 3 of the pixel area.

[0032] Due to the special structure, there is no need to use high-level Vdd in the pixel array, so the input signals of the pixels are: detection signal Test, row selection control Rs(i), integral control Ckint and ground line Gnd. Among them, Rs(i) controls all pixels in a row, and Test, Ckint, and Gnd control all pixels in the pixel array.

[0033] like figure 2 As shown, for a design module containing 4×4 pixel units, the pixels are Pixel(4n+1, 4m+1), Pixel(4n+1, 4m+2), Pixel(4n+1, 4m+ 3), Pixel(4n+1, 4m+4), Pixel(4n+3, 4m+1), Pixel(4n+3, 4m+2), Pixel(4n+3, 4m+3), Pixel(4n +3, 4m+4), Pixel(4...

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Abstract

A layout method and metal wiring structure for picture element array of focul plane reading out circuit belongs to picture element array design technique in the realm of microelectronics and photoelectron as that the layout will be a duplicated symmetry type with reversing and shifting means or a type of detector array and picture element array to be connected specially based on confirming the picture element and new picture element layout structure, as well as that the metal wring structure will be formed by using different metal layers for horizontal direction long routing and vertical direction long routing to avoid the cross of metal wiring with in the same layer. Metal 2 being used in horizontal direction long routing. Metal being used in vertical direction long routing and Metal 1 being used in vertical direction short routing. The present invention not only realize OES structure but also makes the routing of array simple and the area utilization rate of integrating condenser high.

Description

Technical field: [0001] The invention belongs to the technical field of pixel array design in a readout circuit of an imaging system in the field of microelectronics and optoelectronics. Background technique: [0002] Due to the rapid development of integrated circuit technology, infrared imaging systems currently widely use infrared focal plane array (IRFPA: Infrared Focal Plane Array) technology, which is used in many fields such as military affairs, medicine, industry and agriculture, and astronomy. Simultaneously similar techniques are being used in visible light imaging systems. The imaging system mainly includes two parts, one is the detector array, and the other is the readout circuit. [0003] The current common readout circuit structures include switch source follower, column-line separation, and integration outside the pixel, etc., but these structures have defects in power consumption, consistency of adjacent pixels, and storage capacity of the input stage. In o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L21/82H01L27/14
Inventor 吉利久鲁文高陈中建高峻傅一玲
Owner PEKING UNIV