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Transfer printing method of micro light emitting diode array

A technology of micro-light-emitting diodes and arrays, which is applied in semiconductor devices, electrical components, semiconductor/solid-state device manufacturing, etc., and can solve problems such as inability to adapt to pattern structures

Active Publication Date: 2019-02-01
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then when using a PDMS-type transfer head to transfer Micro LEDs, since the adhesion of the PDMS film layer is similar everywhere, the pattern structure of the primary transfer cannot be adapted to other pattern structures after it is determined.

Method used

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  • Transfer printing method of micro light emitting diode array
  • Transfer printing method of micro light emitting diode array
  • Transfer printing method of micro light emitting diode array

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Embodiment Construction

[0026] In order to further illustrate the technical means adopted by the present invention and its effects, the following describes in detail in conjunction with preferred embodiments of the present invention and accompanying drawings.

[0027] see figure 1 , the present invention provides a transfer printing method of a micro light emitting diode array, comprising the following steps:

[0028] Step 1, such as Figure 2-3 As shown, a transfer head 50 and a carrier substrate 10 are provided, on which several micro LEDs 40 are arranged, and the transfer head 50 is used to pick up the micro LEDs 40 on the carrier substrate 10 .

[0029] Specifically, the transfer head 50 may be a PDMS transfer head, including a PDMS film layer, and the PDMS film layer has several raised structures 51 arranged in an array. In the step 1, the protrusions of the PDMS film layer are used The structure 51 picks up the micro light emitting diodes 40 through the adsorption force. In addition, the tra...

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Abstract

The invention provides a transfer printing method of a micro-light emitting diode array. Several receiving protrusions are arranged on a receiving substrate, and the micro light-emitting diodes are placed on the corresponding receiving protrusions on the receiving substrate. Therefore, for the same transfer head, through By changing the arrangement of several receiving protrusions on the receiving substrate, micro light-emitting diode arrays with different arrangements can be transferred on the receiving substrate.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a transfer printing method of a micro light emitting diode array. Background technique [0002] Micro LED (Micro LED) is a device with a size between several microns and hundreds of microns. Because it is much smaller than ordinary LEDs, it is possible to use a single LED as a pixel (Pixel) for display. A Micro LED display is a display that uses a high-density Micro LED array as a display pixel array to achieve image display. Like a large-scale outdoor LED display, each pixel can be addressed and individually driven to light up. It can be regarded as a A reduced version of the outdoor LED display, which reduces the pixel distance from millimeters to microns. Micro LED displays are self-luminous displays like Organic Light-Emitting Diode (OLED) displays, but Micro LED displays are compared to OLED displays also have the advantages of better material stability, longer life, and n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/48H01L33/62H01L25/075H01L21/60
CPCH01L24/24H01L24/82H01L25/0753H01L33/486H01L33/62H01L2224/24226H01L2224/82895H01L2933/0066H01L2933/0033
Inventor 陈黎暄
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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