METHOD FOR CLEANING LANTHANUM GALLIUM SILICATE WAFER

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United States of America Patent

APP PUB NO 20170018424A1
SERIAL NO

15300925

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Abstract

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The present disclosure provides a method for cleaning a lanthanum gallium silicate wafer which comprises the following steps: at a step of 1, a cleaning solution constituted of phosphorous acid, hydrogen peroxide and deionized water is utilized to clean the lanthanum gallium silicate wafer with a megahertz sound wave; at a step of 2, the cleaned lanthanum gallium silicate wafer is rinsed and dried by spinning; at a step of 3, a cleaning solution constituted of ammonia, hydrogen peroxide and deionized water is utilized to clean the lanthanum gallium silicate wafer with the megahertz sound wave; at a step of 4, the cleaned lanthanum gallium silicate wafer is rinsed and dried by spinning; and at a step of 5, the rinsed and dried wafer is placed in an oven to be baked. The present invention shortens a period of acidic cleaning process and prolongs a period of alkaline cleaning and utilizes a more effective cleaning with megahertz sound wave to replace the conventional ultrasonic cleaning to solve the issue of cleaning the lanthanum gallium silicate wafer after a cutting process and to improve surface cleanliness of the lanthanum gallium silicate wafer to get a better cleaning effect.

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Patent Owner(s)

Patent OwnerAddress
INSTITUTE OF MICROELECTRONICS CHINESE ACADEMY OF SCIENCES100029 BEIJING CITY CHAOYANG DISTRICT BEITUCHENG WEST ROAD NO 3 CHINESE ACADEMY OF SCIENCES INSTITUTE OF MICROELECTRONICS MUNICIPAL DISTRICT BEIJING CITY 100029

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Li, Dongmei Beijing, CN 23 12
Li, Xiaojing Beijing, CN 8 14
Liang, Shengfa Beijing, CN 7 1
Liu, Ming Beijing, CN 276 1358
Xie, Changqing Beijing, CN 11 7
Zhang, Hao Beijing, CN 444 2730
Zhou, Lei Beijing, CN 131 436

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