公开(公告)号：US20220338334A1

公开(公告)日：2022-10-20

申请号：US17233220

申请日：2021-04-16

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Yu-Kuang SUN ,  Cheng-Hao LAI ,  Yu-Huan CHEN ,  Wei-Shin CHENG ,  Ming-Hsun TSAI ,  Hsin-Feng CHEN ,  Chiao-Hua CHENG ,  Cheng-Hsuan WU ,  Yu-Fa LO ,  Shang-Chieh CHIEN ,  Li-Jui CHEN ,  Heng-Hsin LIU

IPC: H05G2/00 ,  G03F7/20

Abstract: An extreme ultraviolet (EUV) photolithography system generates EUV light by irradiating droplets with a laser. The system includes a droplet generator with a nozzle and a piezoelectric structure coupled to the nozzle. The generator outputs groups of droplets. A control system applies a voltage waveform to the piezoelectric structure while the nozzle outputs the group of droplets. The waveform causes the droplets of the group to have a spread of velocities that results in the droplets coalescing into a single droplet prior to being irradiated by the laser.

公开(公告)号：US20220334495A1

公开(公告)日：2022-10-20

申请号：US17494558

申请日：2021-10-05

Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.

Inventor： Cheng-Hao LAI ,  Ming-Hsun TSAI ,  Hsin-Feng CHEN ,  Wei-Shin CHENG ,  Yu-Kuang SUN ,  Cheng-Hsuan WU ,  Yu-Fa LO ,  Shih-Yu TU ,  Jou-Hsuan LU ,  Shang-Chieh CHIEN ,  Li-Jui CHEN ,  Heng-Hsin LIU

IPC: G03F7/20

Abstract: Impurities in a liquefied solid fuel utilized in a droplet generator of an extreme ultraviolet photolithography system are removed from vessels containing the liquefied solid fuel. Removal of the impurities increases the stability and predictability of droplet formation which positively impacts wafer yield and droplet generator lifetime.

公开(公告)号：US20200209731A1

公开(公告)日：2020-07-02

申请号：US16816255

申请日：2020-03-12

Applicant: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.

Inventor： Chi YANG ,  Hsin-Feng CHEN ,  Li-Jui CHEN

IPC: G03F1/22 ,  G03F1/70 ,  G03F7/20 ,  G03F1/42

Abstract: A droplet collection bucket includes a droplet collection tube, a level sensor positioned on the droplet collection tube, a gate valve configured to close a rear portion of the droplet collection tube, a gas supply configured to supply a gas into the rear portion of the droplet collection tube, a heating element wrapping around the droplet collection tube, and a drain tube connecting an interior of the droplet collection tube with an outside of the droplet collection tube.