WO2024140201A1 - 针对晶圆上芯片工艺的光刻胶剥离方法和系统 - Google Patents
针对晶圆上芯片工艺的光刻胶剥离方法和系统 Download PDFInfo
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- WO2024140201A1 WO2024140201A1 PCT/CN2023/138335 CN2023138335W WO2024140201A1 WO 2024140201 A1 WO2024140201 A1 WO 2024140201A1 CN 2023138335 W CN2023138335 W CN 2023138335W WO 2024140201 A1 WO2024140201 A1 WO 2024140201A1
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- wafer
- photoresist
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- removal
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/42—Stripping or agents therefor
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/42—Stripping or agents therefor
- G03F7/422—Stripping or agents therefor using liquids only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P50/00—Etching of wafers, substrates or parts of devices
- H10P50/20—Dry etching; Plasma etching; Reactive-ion etching
- H10P50/28—Dry etching; Plasma etching; Reactive-ion etching of insulating materials
- H10P50/286—Dry etching; Plasma etching; Reactive-ion etching of insulating materials of organic materials
- H10P50/287—Dry etching; Plasma etching; Reactive-ion etching of insulating materials of organic materials by chemical means
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P70/00—Cleaning of wafers, substrates or parts of devices
- H10P70/20—Cleaning during device manufacture
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
- H10P72/04—Apparatus for manufacture or treatment
- H10P72/0402—Apparatus for fluid treatment
- H10P72/0406—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H10P72/0411—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing
- H10P72/0414—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing using mainly spraying means, e.g. nozzles
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
- H10P72/04—Apparatus for manufacture or treatment
- H10P72/0402—Apparatus for fluid treatment
- H10P72/0418—Apparatus for fluid treatment for etching
- H10P72/0422—Apparatus for fluid treatment for etching for wet etching
- H10P72/0424—Apparatus for fluid treatment for etching for wet etching using mainly spraying means, e.g. nozzles
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P76/00—Manufacture or treatment of masks on semiconductor bodies, e.g. by lithography or photolithography
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P76/00—Manufacture or treatment of masks on semiconductor bodies, e.g. by lithography or photolithography
- H10P76/20—Manufacture or treatment of masks on semiconductor bodies, e.g. by lithography or photolithography of masks comprising organic materials
- H10P76/204—Manufacture or treatment of masks on semiconductor bodies, e.g. by lithography or photolithography of masks comprising organic materials of organic photoresist masks
Definitions
- the present application relates to the field of semiconductor manufacturing, and in particular to a photoresist stripping method and system for a chip on wafer (Chip On Wafer) process.
- Photoresist stripping refers to the process of removing photoresist from the surface of the wafer after the semiconductor manufacturing photolithography process. Its main purpose is to remove the photoresist after the definition of the pattern is completed, reduce the photoresist residue, metal and particles on the wafer surface, and is one of the important links in the advanced packaging process.
- the debonding effect has a key impact on the product yield.
- the common photoresist removal process is mainly divided into immersion stripping process and single-wafer stripping process.
- the principle is to use photoresist stripping liquid to react with the photoresist on the wafer, so as to achieve the purpose of dissolving and removing the photoresist.
- the photoresist removal process generally uses photoresist stripping liquid to strip the single wafer for 10 to 20 minutes, or soaks for 20 to 30 minutes and then uses single-wafer stripping to rinse for 5 to 10 minutes.
- the chip height is uncertain, usually ranging from 50 ⁇ m to 800 ⁇ m (or even higher).
- the wafer rotation speed is generally controlled above 500RPM. Due to the high wafer rotation speed, it is very easy to cause splashing, and the centrifugal force of the high-speed rotation of the wafer will cause the edge chip to shift or even fly out.
- the effect diagram when the wafer rotation speed is 600RPM and the single-wafer degumming time is 150s, 300s and 350s respectively. It can be seen from Figure 1 that a good degumming effect can only be achieved when the single-wafer degumming time is 350s and the rotation speed is 600RPM. However, a long degumming time will lead to a decrease in production. And when the wafer rotation speed is above 500RPM, splashing is easy to occur. The splashed liquid adheres to the inner wall of the chamber and may drip onto the surface of the wafer, affecting the next process and ultimately causing poor production. The rate is reduced.
- the embodiments of the present application provide a photoresist stripping method and system for chip-on-wafer processes, so as to at least solve the problem in the prior art of splashing liquid due to excessively high rotation speed, which causes the splashed liquid to adhere to the inner wall of the cavity and drip onto the surface of the wafer, affecting the next process and ultimately leading to low production yield.
- an embodiment of the present application provides a photoresist stripping method for a chip-on-wafer process, comprising:
- the method further comprises:
- the rotation speed of the wafer to be subjected to photoresist removal is controlled within a range of 30RPM to 200RPM, and megasonic waves are applied to the wafer to be subjected to photoresist removal for a second preset time for cleaning.
- the method before controlling the rotation speed of the wafer to be photoresist removed within the range of 30RPM to 200RPM and applying megasonic waves for a second preset time to the wafer to be photoresist removed for cleaning, the method further includes: wetting the wafer to be photoresist removed.
- the frequency of the megasonic wave is between 15 MHz and 40 MHz.
- the method before controlling the rotation speed of the wafer to be subjected to photoresist removal to be within the range of 30RPM to 200RPM and applying megasonic waves for a first preset time to the wafer to be subjected to photoresist removal after wetting to perform photoresist removal, the method further comprises:
- the first preset time corresponding to the preset threshold interval is matched from a first preset database based on the preset threshold interval.
- the method further comprises:
- the wafer to be subjected to photoresist removal is placed in a soaking tank and soaked for a third preset time.
- the method before placing the wafer to be subjected to photoresist removal into a soaking tank and soaking for a third preset time, the method further comprises:
- the third preset time corresponding to the preset threshold interval is matched from a second preset database based on the preset threshold interval.
- an embodiment of the present application provides a photoresist stripping system for a chip-on-wafer process, the system comprising:
- a wafer holding device used for holding a wafer to be subjected to photoresist removal
- a nozzle used for spraying a photoresist stripping liquid onto a wafer to be subjected to photoresist removal
- a megasonic wave device is used to perform megasonic wave photoresist removal on a wafer to be subjected to photoresist removal;
- a rotation driving device used for driving the wafer holding device to drive the wafer to be subjected to photoresist removal to rotate;
- the controller is used to control the nozzle to spray photoresist stripping liquid to wet the wafer to be removed from the photoresist, and control the rotation drive device to drive the wafer to be removed from the photoresist to rotate at a speed of 30RPM to 200RPM, and control the megasonic wave device to apply megasonic waves for a first preset time to the wafer to be removed from the photoresist after wetting to remove the photoresist.
- the degumming and cleaning processes must be combined with a high rotation speed of more than 500RPM to ensure the degumming capability. If the rotation speed is too low, it is difficult to strip and remove the dissolved photoresist. However, the high rotation speed and the relatively high chip thickness will cause liquid splashing in the chamber.
- the photoresist stripping method for the chip process on the wafer of the present application is used for degumming and cleaning. The degumming and cleaning are performed at a low rotation speed of 30RPM to 200RPM, and no splashing occurs. Megasonic waves are used for degumming and cleaning to ensure that all chips on the wafer are fully processed.
- the liquid film can cover the chips at the edge of the wafer, and megasonic waves are used for debonding and cleaning to ensure that all chips on the wafer are fully and effectively processed.
- FIG6 is a fourth schematic diagram of the effect of photoresist stripping using megasonic waves according to an embodiment of the present application.
- connection is not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
- the “multiple” involved in this application refers to greater than or equal to two.
- “And/or” describes the association relationship of associated objects, indicating that there can be three relationships, for example, “A and/or B” can represent: A exists alone, A and B exist at the same time, and B exists alone.
- the terms “first”, “second”, “third” and the like involved in the present application are merely used to distinguish similar objects and do not represent a specific ordering of the objects.
- Step S201 wetting the wafer from which the photoresist is to be removed.
- Step S202 controlling the rotation speed of the wafer to be subjected to photoresist removal to be within the range of 30RPM to 200RPM, and applying megasonic waves for a first preset time to the wafer to be subjected to photoresist removal after being wetted to perform photoresist removal.
- the megasonic wave in the present embodiment can be a spatial alternating phase shift (SAPS) megasonic wave technology, or other megasonic wave technologies that can achieve the purpose of the present application.
- SAPS spatial alternating phase shift
- the spatial alternating phase shift megasonic wave technology is to achieve a uniform distribution of megasonic wave energy on the surface of the wafer by controlling the relative motion of the half-wavelength range between the megasonic wave generator and the wafer, so as to achieve the most optimized cleaning effect.
- the rotation speed of the wafer can also be controlled within the range of 30RPM to 200RPM, and the wafer can be cleaned by applying megasonic waves for a second preset time.
- the wafer after degumming can be cleaned at less than 200RPM, avoiding the problem of splashing liquid due to excessive rotation speed during wafer cleaning in the prior art, so that the splashed liquid adheres to the inner wall of the cavity and then drips on the surface of the wafer, affecting the next process, and ultimately leading to the problem of low production yield.
- it can also avoid the problem of the chip at the edge of the wafer being displaced and flying out under the action of centrifugal force due to excessive rotation speed of the wafer.
- the wafer after step S202 may be wetted before controlling the rotation speed of the wafer within the range of 30RPM to 200RPM and applying megasonic waves for a second preset time to the wafer for cleaning.
- the wafer after step S202 may be wetted by controlling the nozzle to spray cleaning liquid.
- the cleaning liquid may be, but is not limited to, deionized water or water dissolved with carbon dioxide.
- the frequency of the megasonic wave is between 15 MHz and 40 MHz.
- a frequency of the megasonic wave that is too high or too low may lead to a problem of low production yield. Therefore, in order to avoid the problem of production yield caused by a frequency of the megasonic wave that is too high or too low, in this embodiment, by controlling the frequency of the megasonic wave to be between 15 MHz and 40 MHz, the problem of the frequency of the megasonic wave that is too high or too low affecting the production yield can be avoided.
- the megasonic frequency in the embodiment of the present application can be used in both the degumming process and the cleaning process, and is not specifically limited here.
- the rotation speed of the wafer is controlled within a range of 30 RPM to 200 RPM, and Before applying megasonic waves for a first preset time to the wafer after wetting for debonding, the total amount of photoresist residue on the surface of the wafer to be removed can also be detected; the preset threshold range in which the total amount of photoresist residue is located is determined; and based on the preset threshold range, the first preset time corresponding to the preset threshold range is matched from the first preset database.
- the first preset time for megasonic wave stripping is accurately determined according to the preset threshold interval in which the total amount of photoresist residue is located, and adaptive adjustment of the first preset time is achieved, thereby avoiding the problem of incomplete photoresist removal due to too short stripping time when there is too much photoresist, and also avoiding the problem of increased process time due to too long stripping time when there is too little photoresist.
- the first preset database stores the first preset time corresponding to each preset threshold interval, and the first preset time corresponding to each preset threshold interval is different.
- the photoresist stripping method for the chip process on the wafer of the present application is to remove the photoresist by combining megasonic waves with a low rotation speed of 30RPM to 200RPM, which solves the defects of the existing stripping technology, improves the efficiency of stripping photoresist and improves the stripping quality, and uses megasonic wave technology to strip and clean the wafer. While improving the stripping and cleaning capabilities and increasing production capacity, the low rotation speed advantage of 30RPM to 200RPM of the present application can effectively prevent splashing, so that the chip at the edge of the wafer can be fully processed, and prevent the edge chip from being displaced or even flying out of the wafer.
- the frequency of the megasonic waves is between 15 MHz and 40 MHz.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Cleaning Or Drying Semiconductors (AREA)
Abstract
Description
Claims (10)
- 一种针对晶圆上芯片工艺的光刻胶剥离方法,其特征在于,包括:对待进行光刻胶去除的晶圆进行润湿;控制所述待进行光刻胶去除的晶圆的转速在30RPM至200RPM范围内,并对润湿之后的所述待进行光刻胶去除的晶圆施加第一预设时间的兆声波进行去胶。
- 根据权利要求1所述的针对晶圆上芯片工艺的光刻胶剥离方法,其特征在于,在控制所述待进行光刻胶去除的晶圆的转速在30RPM至200RPM范围内,并对润湿之后的所述待进行光刻胶去除的晶圆施加第一预设时间的兆声波进行去胶之后,所述方法还包括:控制所述待进行光刻胶去除的晶圆的转速在30RPM至200RPM范围内,并对所述待进行光刻胶去除的晶圆施加第二预设时间的兆声波进行清洗。
- 根据权利要求2所述的针对晶圆上芯片工艺的光刻胶剥离方法,其特征在于,在控制所述待进行光刻胶去除的晶圆的转速在30RPM至200RPM范围内,并对所述待进行光刻胶去除的晶圆施加第二预设时间的兆声波进行清洗之前,所述方法还包括:对所述待进行光刻胶去除的晶圆进行润湿。
- 根据权利要求1或2所述的针对晶圆上芯片工艺的光刻胶剥离方法,其特征在于,所述兆声波的频率在15MHz至40MHz。
- 根据权利要求1所述的针对晶圆上芯片工艺的光刻胶剥离方法,其特征在于,在控制所述待进行光刻胶去除的晶圆的转速在30RPM至200RPM范围内,并对润湿之后的所述待进行光刻胶去除的晶圆施加第一预设时间的兆声波进行去胶之前,所述方法还包括:检测所述待进行光刻胶去除的晶圆表面的光刻胶总残留量;确定所述光刻胶总残留量所在预设阈值区间;基于所述预设阈值区间从第一预设数据库中匹配与所述预设阈值区间对应的所述第一预设时间。
- 根据权利要求5所述的针对晶圆上芯片工艺的光刻胶剥离方法,其特征 在于,在检测所述待进行光刻胶去除的晶圆表面的光刻胶总残留量之后,所述方法还包括:在所述光刻胶总残留量大于预设总残留量的情况下,将所述待进行光刻胶去除的晶圆放入浸泡槽中浸泡第三预设时间。
- 根据权利要求6所述的针对晶圆上芯片工艺的光刻胶剥离方法,其特征在于,在将所述待进行光刻胶去除的晶圆放入浸泡槽中浸泡第三预设时间之前,所述方法还包括:基于所述预设阈值区间从第二预设数据库中匹配与所述预设阈值区间对应的所述第三预设时间。
- 一种针对晶圆上芯片工艺的光刻胶剥离系统,其特征在于,所述系统包括:晶圆保持装置,用于保持待进行光刻胶去除的晶圆;喷嘴,用于向待进行光刻胶去除的晶圆喷出光刻胶剥离液;兆声波装置,用于对待进行光刻胶去除的晶圆进行兆声波去胶;旋转驱动装置,用于驱动所述晶圆保持装置带动所述待进行光刻胶去除的晶圆旋转;控制器,用于控制所述喷嘴喷出光刻胶剥离液对待进行光刻胶去除的晶圆进行润湿,并控制所述旋转驱动装置驱动所述待进行光刻胶去除的晶圆以30RPM至200RPM的转速旋转,以及控制兆声波装置对润湿之后的所述待进行光刻胶去除的晶圆施加第一预设时间的兆声波进行去胶。
- 根据权利要求8所述的针对晶圆上芯片工艺的光刻胶剥离系统,其特征在于,所述控制器还用于控制所述旋转驱动装置驱动晶圆以30RPM至200RPM的转速旋转,并控制兆声波装置对去胶之后的晶圆施加第二预设时间的兆声波进行清洗。
- 根据权利要求8所述的针对晶圆上芯片工艺的光刻胶剥离系统,其特征在于,所述喷嘴还用于喷出清洗液,对晶圆进行润湿和清洗。
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| Application Number | Priority Date | Filing Date | Title |
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| JP2025538458A JP2025542487A (ja) | 2022-12-30 | 2023-12-13 | チップオンウェハプロセスに対応したフォトレジスト剥離方法およびシステム |
| KR1020257025531A KR20250133339A (ko) | 2022-12-30 | 2023-12-13 | 칩 온 웨이퍼 공정에 대한 포토레지스트 박리 방법 및 시스템 |
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| CN202211730215.X | 2022-12-30 | ||
| CN202211730215.XA CN118276420A (zh) | 2022-12-30 | 2022-12-30 | 针对晶圆上芯片工艺的光刻胶剥离方法和系统 |
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| WO2024140201A1 true WO2024140201A1 (zh) | 2024-07-04 |
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| JP (1) | JP2025542487A (zh) |
| KR (1) | KR20250133339A (zh) |
| CN (1) | CN118276420A (zh) |
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| WO (1) | WO2024140201A1 (zh) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118658801A (zh) * | 2024-08-19 | 2024-09-17 | 江苏峰博装备技术有限公司 | 一种用于清洗刻蚀机的晶圆残留物检测方法 |
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| CN120581472B (zh) * | 2025-06-03 | 2026-03-03 | 苏州冠礼科技股份有限公司 | 一种再生晶圆半导体加工装置 |
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| TWI776884B (zh) * | 2018-04-24 | 2022-09-11 | 大陸商盛美半導體設備(上海)股份有限公司 | 清洗半導體矽片的裝置和方法 |
| TWI859149B (zh) * | 2019-07-19 | 2024-10-21 | 大陸商盛美半導體設備(上海)股份有限公司 | 基板清洗方法及清洗裝置 |
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| CN113721430B (zh) * | 2021-03-30 | 2022-09-23 | 腾讯科技(深圳)有限公司 | 光刻胶去除方法以及光刻胶去除系统 |
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- 2022-12-30 CN CN202211730215.XA patent/CN118276420A/zh active Pending
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- 2023-12-13 KR KR1020257025531A patent/KR20250133339A/ko active Pending
- 2023-12-13 JP JP2025538458A patent/JP2025542487A/ja active Pending
- 2023-12-13 WO PCT/CN2023/138335 patent/WO2024140201A1/zh not_active Ceased
- 2023-12-28 TW TW112151419A patent/TW202445284A/zh unknown
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| CN118658801A (zh) * | 2024-08-19 | 2024-09-17 | 江苏峰博装备技术有限公司 | 一种用于清洗刻蚀机的晶圆残留物检测方法 |
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| TW202445284A (zh) | 2024-11-16 |
| CN118276420A (zh) | 2024-07-02 |
| JP2025542487A (ja) | 2025-12-25 |
| KR20250133339A (ko) | 2025-09-05 |
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