Zhaochi Semiconductor and other 5 companies have the latest Micro/Mini LED patent progress

Recently, Zhaochi Semiconductor, Yuanju Technology, Weijiu Optoelectronics Technology, Yamamoto Optoelectronics, and Huichen Electronics have the latest developments in Micro/Mini LED-related patent applications. The patents involve multiple processes and manufacturing links such as chip structure, preparation process, and detection devices, and continue to promote the advancement of Micro/Mini LED technology.

Zhaochi Semiconductor: Applying for a patent for vertical structure Micro LED chip and its preparation method

Information from the State Intellectual Property Office shows that Jiangxi Zhaochi Semiconductor Co., Ltd. has applied for a patent titled "A vertical structure Micro LED chip and its preparation method", with the publication number CN119764305A, and the application date is December 2024.

The patent abstract shows that the present invention relates to the technical field of LED packaging. The present invention discloses a vertical structure Micro LED chip and a preparation method thereof. The vertical structure Micro LED chip includes a first Micro LED chip and a second Micro LED chip. The first Micro LED chip includes a first substrate, a first epitaxial layer, and a first electrode. A first bonding layer is provided on the first epitaxial layer, and the first electrode is exposed; the first electrode includes a first N-type electrode and a first P-type electrode; the second Micro LED chip The LED chip includes a second epitaxial layer and a second electrode, a second bonding layer is provided on the second epitaxial layer, and the second electrode is exposed; the second electrode includes a second N-type electrode; the first Micro LED chip and the second Micro LED chip are bonded together through the first bonding layer and the second bonding layer, and the first N-type electrode and the second N-type electrode are arranged in opposite positions. Implementing the present invention effectively increases the optical output power of the Micro LED chip per unit area, and also reduces image distortion caused by wavelength differences between adjacent chips.

Yuanju Technology: Obtained a patent for a rapid mold change platform for Micro-LED mass transfer devices

Shaoxing Yuanju Technology Co., Ltd. obtained a patent titled "A rapid mold change platform for Micro-LED mass transfer devices", with the authorization announcement number CN 222720357U, and the application date is June 2024.

The patent abstract shows that the utility model discloses a quick mold change platform for a Micro-LED mass transfer device, which includes a bottom mold, a through hole, the through hole is set at the upper end of the bottom mold; an adsorption groove, the adsorption groove is set at the outer periphery of the through hole; an upper glass slide, the upper glass slide is set at the upper end of the through hole; a fixing component, the fixing component includes a step plate with one end against the upper end of the upper glass plate, and a flat plate set at the lower end of the other end of the step plate. The adjusting column and the locking knob are rotatably connected to the middle part of the step pressure plate; the flat adjustment column is threadedly connected to the step pressure plate; the locking knob is threadedly connected to the upper end of the bottom mold. The bottom mold can be replaced by setting up a quick disassembly device to adapt to square or circular substrates. A height-adjustable step pressure plate is installed to horizontally press the upper glass slide to prevent damage to the upper glass slide and enable the installation of upper glass slides of different thicknesses. Stabilizing the position of the upper slide helps improve transfer accuracy.

According to the data, Yuanju Technology Co., Ltd. is a technology enterprise focusing on the research and development of thin film chip transfer technology such as Micro-LED. The company's core business covers M-LED light-emitting chip transfer & repair integration, flexible ultrasonic electronic device preparation, flexible optogenetic electronic device preparation, ultra-thin chip patching process and other special instruments and complete solutions required.

Weijiu Optoelectronics Technology: Application for two Micro LED-related patents

Information from the State Intellectual Property Office shows that Weijiu Optoelectronics Technology Co., Ltd. has applied for a patent titled "A Micro LED mesa with ITO buffer layer and its etching uniformity preparation method", with the publication number CN119767887A, and the application date is March 2025.

The patent summary shows that a Micro LED mesa with an ITO buffer layer and its etching uniformity preparation method belong to the technical field of semiconductor devices and their processing technology. The present invention improves the original process flow, uses the ITO layer as the ICP etching buffer layer, etches the Micro LED mesa at a rate according to the faster etching rate part of the wafer, and further over-etches to ensure that the epitaxial layer is etched through. The present invention uses ITO as a buffer layer to protect the underlying structure, and then uses wet etching or physical etching to remove the excess buffer layer to eliminate the impact of uneven etching. Furthermore, since the ITO buffer layer has good conductivity, it can improve the current expansion effect of the chip and increase the brightness of the chip. This can solve the problem of uneven etching rate for the entire wafer in the current Micro LED mesa etching process and optimize the yield of Micro LED chips.

In addition, Weijiu Optoelectronics also applied for a patent titled "Micro LED pixels that solve lateral etching and their preparation methods", with the publication number CN119767916A, and the application date is March 2025.

This patented invention solves the serious lateral etching problem that exists in the N+GaAs heavily doped layer and the P-type GaP layer during the etching process, and solves the problem of discontinuous coverage of the subsequent passivation layer due to lateral etching. It can effectively improve the problem of rough etched sidewalls and bottoms, greatly increases the etching selectivity of the hard mask, and thereby improves the luminous efficiency of Micro LED.
According to data, Weijiu Optoelectronics was established in 2023 and is committed to the research and development and production of a new generation of display technology Micro-LED micro-displays, providing full-color micro-display solutions for Yuanverse AR displays and other various display scenarios.

Yamamoto Optoelectronics: Apply for a patent for Mini LED plastic surface defect detection based on photometric stereoscopic method

Shenzhen Yamamoto Optoelectronics Co., Ltd. applied for a patent titled "A Mini-LED adhesive surface defect detection device and method based on photometric stereometry", with the publication number CN119779971A, and the application date is December 2024.

The patent abstract shows that the present invention discloses a MiniLED rubber surface defect detection device and method based on the photometric stereoscopic method, including a detection platform. A mounting bracket is fixed on the top of the detection platform. A servo motor is fixed on the top of the mounting bracket. A fixed seat is fixed on the lower side wall of the mounting bracket. A rotating screw is installed inside the fixed seat through a bearing. A rotating connection component is provided between the top of the rotating screw and the output shaft of the servo motor. The servo motor drives the rotating shaft to rotate through the drive connection component, causing the drive gear to drive the circular toothed plate to rotate, so that the sliding sleeve drives the lighting lamp to move in a circular motion, allowing the lighting lamp to illuminate the Mini LED rubber surface from different angles. This avoids the use of multiple light sources to illuminate the Mini-LED rubber surface from different angles, avoids multiple light sources consuming too much power resources, and avoids multiple light sources being damaged at the same time and increasing maintenance costs.

According to data, Yamamoto Optoelectronics’ main products include mobile phone backlight display modules, special display backlight display modules, liquid crystal display modules, and electronic paper smart display devices, which are widely used in professional display fields such as smartphones, tablets, industrial control equipment displays, and other consumer electronic displays.

Yamamoto Optoelectronics has entered the supplier system of LCD module companies such as Shenzhen Tianma, BOE, China Star Optoelectronics, China Display Optoelectronics, Dijing Optoelectronics, Truly Optoelectronics, Tongxingda, and Changxin Technology.

Huichen Electronics: Obtained a patent for a Mini LED backlight

Shenzhen Huichen Electronics Co., Ltd. obtained a patent called "A Mini LED backlight", the authorization announcement number is CN117055260B, and the application date is August 2023.

The patent summary shows that the application belongs to the field of backlight sources, especially a Mini An LED backlight includes a main substrate and a sub-substrate. The main substrate includes a plurality of main substrate teeth arranged in parallel. The sub-substrate includes a plurality of sub-substrate teeth arranged in parallel. The main substrate also includes a base. The main substrate teeth are fixedly connected to one side of the base. This application has the effect of switching light efficiency while ensuring the utilization rate of the light-emitting chip.

Information shows that Huichen Electronics was established in 2005 and focuses on the research and development, production and sales of LED backlights and optical components. The company's products are widely used in high-end optoelectronic display fields such as aerospace medical, industrial control, and automotive.