Samsung Electronics Co., Ltd.

Jeonggun Lee

Jongmyeon Park

Seungjun Lee

Minsun Park

Beom-seok Lee

Suhyeon Kim

Moorim Kim

Shinhee Cho

Jongsuk Chung

Induk Hwang

Jinkyeong Kim

Jungnam Lee

Skin care device

Provided are a valve unit, a microfluidic device including the same, and a method of fabricating the valve unit. The method includes: forming a lower substrate including a channel including a first region and a second region which is deeper than the first region and is adjacent to one side of the first region; forming an upper substrate comprising a valve material chamber which extends only partially through the upper substrate; filling the valve material chamber with a valve material and curing the valve material in the valve material chamber; attaching a surface of the upper substrate in which the valve material chamber is formed to a surface of the lower substrate in which the channel is formed, so that the valve material chamber overlaps an overlapped portion of the first region, and does not overlap a non-overlapped portion of the first region; melting the valve material accommodated in the valve material chamber to flow the valve material into the non-overlapped portion of the first region; and curing the valve material flowed into the non-overlapped portion to close the first region.

Method of fabricating valve unit in a microfluidic device

Provided are a centrifugal force based platform formed to be rotatable and including a home mark having a retro-reflective property of light, and a centrifugal force based microfluidic system including the platform. The method of determining a home position of the centrifugal force based platform includes: rotating the platform formed and including a home mark having a retro-reflective property of light; emitting light from a light-emitting unit to the platform; and detecting the emitted light, which is retro-reflected by the home mark, in a light-receiving unit, and then determining the home position of the platform based on the detected light.

Centrifugal force based platform, microfluidic system including the same, and method of determining home position of the platform

Provided is a tester for testing an optical detector. The tester includes a plurality of light emitting units which emit light beams to the optical detector, wherein the light beams have light intensities different from each other, and a power supply unit which supplies electric power to the plurality of light emitting units.

Tester for testing optical detector

A microfluidic device and a method of fabricating the microfluidic device are provided. The microfluidic device includes: a platform including an upper substrate and a lower substrate that are bonded to face each other; a microfluidic structure obtained by forming grooves in the lower substrate; a lower substrate protrusion pattern including an outline protrusion that protrudes from the lower substrate toward the upper substrate along an outline of the microfluidic structure; and an adhesive layer disposed between the lower substrate protrusion pattern and the upper substrate in order to bond the upper substrate and the lower substrate to each other. The lower substrate protrusion pattern only supports the upper substrate, and remaining portions of the lower substrate except for the lower substrate protrusion pattern do not have structures for supporting the upper substrate.

Microfluidic device and method of fabricating the same

Growing community of inventors

Seoul, South Korea

Jeonggun Lee