Korea Institute of Machinery & Materials

Center for Advanced Meta-materials

Jaegu Kim

Jae-Hyun Kim

Hak Joo Lee

Kornel F Ehmann

Jung Yup Kim

Jong-Kweon Park

Seung Kook Ro

Bongkyun Jang

Byung-Sub Kim

Sung Cheul Lee

Yeong-Eun Yoo

Kwangseop Kim

Sunghwan Chang

Sejeong Won

Peidong Han

Minwoo Kweun

An embodiment of the present invention provides a stretchable substrate that may be significantly stretchable to be deformed but have a low rate of breakage. Here, the stretchable substrate includes a cell, a cut portion, and an extended cut line. A plurality of cells are formed in the substrate body, and a device is mounted thereon. The cut portion is formed in the substrate body to increase a distance between the cells when the substrate body is stretched. The extended cutting line is formed to extend from an end portion of the cut portion and bent inwardly of the cell so that corners of the cells are rounded.

Stretchable substrate

A microneedle structure, a manufacturing method therefor, and a manufacturing apparatus therefor are presented. The microneedle structure manufacturing method according to one embodiment of the present invention comprises the steps of: a) injecting, into a lower mold comprising a microneedle intaglio, a polymer solution containing a biocompatible polymer; and b) coupling a shape control mold, which comprises a protrusion, to the lower mold such that one end of the protrusion of the shape control mold is impregnated with the biocompatible polymer solution injected into the microneedle intaglio.

Microneedle structure and manufacturing method and manufacturing apparatus for the same

According to an exemplary embodiment of the present invention, a trocar is provided. The trocar includes: a sharp end; at least three concave cutting edges extended from the sharp end; and at least three concave cutting surfaces forming the sharp end and the at least three cutting edges.

Trocar, method for manufacturing the same, and method for continuously manufacturing the same

Growing community of inventors

Daejeon, South Korea

Jaegu Kim