gn-I588880 更正後請求項: |
US10026603B2 |
1.一種晶圓薄化製程,其步驟包含有: |
1. A manufacturing process of wafer thinning, comprising the steps of: |
A) 研磨晶圓,研磨一晶圓的一面,以使該晶圓被研磨至一第一預定厚度,該研磨晶圓之步驟 A)包含有: |
A) grinding one of the two faces of a wafer so as to make the wafer to have a first predetermined thickness; wherein A) includes following steps: |
1)一進料檢驗、 |
1) a step to inspect the wafer prior to the wafer-grinding; |
2)一晶圓貼膜與 |
2) a step of a wafer-taping process to adhere a film onto a first face of the wafer; and |
3)一晶圓研磨之步驟;於該進料檢驗之步驟中,對一即將進行研磨之晶圓進行一檢驗程序;於該晶圓貼膜之步驟中,將該即將進行研磨之晶圓貼附於一膜體;
於該晶圓研磨之步驟中,對該晶圓之未貼附有該膜體的一面進行研磨,直至該晶圓達到該第一預定厚度,該晶圓之外周部係保留數 mm 未被研磨;以及 |
3) a step to grind a second face of the wafer that does not have the film till the wafer achieves the first predetermined thickness, grinding is only applied to a central portion of the second face of the wafer with a several mm un-ground margin at a peripheral portion around the wafer; and |
B) 蝕刻晶圓,對具有該第一預定厚度之該晶圓的被研磨面進行蝕刻,以使該晶圓被蝕刻至一第二預定厚度,其中該蝕刻的步驟 B)具有: |
B) etching the second face of the wafer so as to make the wafer to have a second predetermined thickness; wherein the wafer etching B) includes following steps: |
1)一化學濕式蝕刻,其係使用蝕刻液對已研磨至該第一預定厚度之晶圓的一面進行一濕式蝕刻,以使該晶圓被蝕刻至該第二預定厚度; |
1) a step of a chemical wet etching process to apply an etching solution to wet-etch the second face of the wafer so as to further reduce a thickness of the wafer to the second predetermined thickness; |
2)一第一次清洗晶圓,其對該晶圓進行一清洗; |
2) a step of a first-time wafer cleaning process to clean the wafer; |
3)一第一次乾燥晶圓,其係對該晶圓進行乾燥; |
3) a step of a first-time wafer drying process to dry the wafer; |
4)一表面粗度蝕刻,其係對該晶圓再次進行濕式蝕刻,以使該晶圓的被蝕刻面之粗度增加; |
4) a step of an etching process to achieve predetermined surface roughness so as to increase surface roughness of the second face of the wafer; |
5)一第二次清洗晶圓,其對該晶圓進行一清洗; |
5) a step of a second-time wafer cleaning process to clean the wafer; and |
6)一第二次乾燥晶圓,其係對該晶圓進行乾燥; |
6) a step of a second-time wafer drying process to dry the wafer; |
7)一酸洗晶圓,以一酸液對該晶圓進行清洗; |
7) a step of a wafer-pickling process to clean the wafer using an acidic cleaner; |
8)一第三次清洗晶圓,其對該晶圓進行一清洗;以及 |
8) a step of a third-time wafer cleaning process to clean the wafer; and |
9)一第三次乾燥晶圓、其係對該晶圓進行乾燥,其中該酸液為氫氟酸;
該第一次清洗晶圓、該第二次清洗晶圓與該第三次清洗晶圓之步驟係使用純水清洗方式;
該第一次乾燥晶圓、該第二次乾燥晶圓與該第三次乾燥晶圓之步驟係使用離心脫水方式,
其中該晶圓薄化製程依據上述字母排列及數字排列的順序進行。 |
9) a step of a third-time wafer drying process to dry the wafer; wherein the acidic cleaner is a dilute hydrofluoric acid,
all of the first-time wafer cleaning process, the second-time wafer cleaning process and the third-time wafer cleaning process are horizontal deionized water rinsing processes, and
all of the first-time wafer drying process, the second-time wafer drying process and the third-time wafer drying process are spin-drying processes; and
wherein the manufacturing process of wafer thinning follows a sequence of the above alphabetic order and the above numeric order. |