Lg Electronics Inc.

Samsung Electronics Co., Ltd.

Catholic University Industry Academic Cooperation Foundation

Kyu Bong Choi

Eun Seok Choi

Joon Hyung Kim

Sha Rim Choe

Jeong Woo Lee

Tae Suk Suh

Kyung In Choi

Jun Mo Park

Kyoung Sik Choi

Yeon Ho Park

Jin Beom Chung

Wang Seop Lim

Yon Lae

Jai Sung Kim

A method of manufacturing a semiconductor device includes: forming first to third preliminary active patterns on a substrate to have different intervals therebetween, forming first and second field insulating layers between the first and second preliminary active patterns and between the second and third preliminary active patterns, respectively, and forming first to third gate electrodes respectively on first to third active patterns formed based on the first to third preliminary active patterns, separated by first and second gate isolation structures.

Method of manufacturing semiconductor device

Mobile phone

Charger for portable terminals

Provided is a phantom device having an internal organ simulating phantom. The phantom device comprises: a phantom receiving radiation emitted from a radiation emitting unit and comprising therein a simulant that simulates an internal organ; a lifting unit installed under the phantom to support the phantom and moving the phantom relative to the radiation emitting unit, the lifting unit comprising: a worm shaft axially rotated by an external torque and having a worm formed on an outer circumferential surface thereof, a cylindrical worm wheel having gear grooves formed on an outer circumferential surface thereof to engage with the worm and a female screw formed on an inner circumferential surface thereof, and rotated by the axial rotation of the worm shaft; and a driven screw engaging with the female screw of the worm wheel, and moved up and down by the rotation of the worm wheel to move up and down the phantom; and a horizontal moving unit interlocking with the lifting unit and horizontally moving the phantom. Accordingly, since the phantom device can simulate any movement pattern, even the respiratory movement pattern of a patient's internal organ to accurately determine a desired dose of radiation to be delivered to the body part, high quality assurance of radiation therapy equipment can be achieved and therapeutic effect can be improved.

Phantom device having internal organ simulating phantom

Growing community of inventors

Seoul, South Korea

Kyu Bong Choi