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Pressure sensor array and its preparation method

A pressure sensor and array technology, applied in the sensor field, can solve the problems of sensitivity and low resolution of the pressure sensor, and achieve the effects of saving preparation cost, simple preparation process and simple structure

Active Publication Date: 2016-11-23
BEIJING INST OF NANOENERGY & NANOSYST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the defects of insufficient sensitivity and low resolution of the above-mentioned existing pressure sensors, the present invention provides a pressure sensor array capable of overcoming the defects and a preparation method thereof

Method used

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  • Pressure sensor array and its preparation method
  • Pressure sensor array and its preparation method
  • Pressure sensor array and its preparation method

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Embodiment 1

[0037] For the pressure sensor array in this embodiment, see figure 1 and Fig. 2, including: substrate 1; semiconductor film layer 2 on the substrate; nanowires or nanorod arrays 3 with piezoelectric properties on the semiconductor film layer 2; gaps between nanowires or nanorod arrays 3 are filled with dielectric Material 4, the dielectric material may be transparent or non-transparent or translucent; an upper electrode 6 on the nanowire or nanorod array 3; and a lower electrode 5 on the semiconductor thin film layer 2. Wherein, the nanowire or nanorod array 3 forms a luminescent PN junction with the semiconductor thin film layer 2 . The pressure sensor array also includes upper electrode lead-out wires 7 and lower electrode lead-out wires 8 that are necessarily related to the pressure sensor array according to the present invention, and are used to apply a driving voltage to the pressure sensor array device.

[0038] Since the nanowire or nanorod array 3 forms a light-emitt...

Embodiment 2

[0068] For the pressure sensor array in this embodiment, see Figure 4 , fabricated on the substrate 11, including: the bottom electrode 21 on the substrate 11, the sensing cell array on the bottom electrode 21 and the top electrode 61 on the sensing cell array, wherein the sensing cell is composed of the region 31 and the region 41 to form a light-emitting PN junction, wherein the material of the P-type region and / or N-type region of the PN junction is a piezoelectric material; the gap of the sensing unit is filled with a dielectric material 51, and the dielectric material 51 can be Transparent or opaque or translucent. The pressure sensor array also includes wires 71 and wires 81 drawn from the bottom electrode 21 and the top electrode 61 , which are necessarily related to the pressure sensor array according to the present invention. In the present invention, light-emitting diodes (PN junctions) are used as basic pixel units, and driving voltages are applied to the wires 71...

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Abstract

The present invention provides a pressure sensor array and a preparation method thereof. The pressure sensor array uses a luminescent PN junction as a sensing unit. The material of the P-type region and / or the N-type region of the luminescent PN junction is a piezoelectric material. When external stress is applied to the surface of a pressure sensor array device composed of a luminescent PN junction sensing unit array, due to the non-uniform distribution of stress on the surface of the device, a piezoelectric force is generated on the piezoelectric material of each luminescent PN junction. The size of the electric potential field is different, which causes the luminous intensity of each light-emitting PN junction of the basic pixel unit to change to varying degrees. Through the change of the luminous intensity of each pixel point in the PN junction array, the surface of the pressure sensor array device can be quickly obtained. information on the applied stress.

Description

technical field [0001] The invention relates to the field of sensors, in particular to a pressure sensor array and a preparation method thereof. Background technique [0002] Compared with the bionics of several other senses (sight, hearing, smell and taste) that are relatively well developed, the bionics of touch is still an unsolved problem. Because the bionics of touch requires high-resolution, high-sensitivity, and fast-response large-area stress sensor arrays, current international research efforts are mainly focused on single nanoscale stress sensor devices, and studying the response of these single nanoscale stress sensor devices to force . At present, Z.N.Bao's research group at Stanford University and Ali Javey's research group at the University of California, Berkeley have begun to study array pressure sensors, which use self-assembled nanowires, organic field effect tubes or microstructured rubber as basic units. The change in resistance after stress is used to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/113H01L41/27H10N30/30H10N30/05
Inventor 王中林潘曹峰
Owner BEIJING INST OF NANOENERGY & NANOSYST
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