Patent ID: 11968778
Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC A  B  H

Claim 0:
1. A method of manufacturing a stretchable substrate having improved stretch uniformity, the method comprising:
forming an auxetic including a plurality of unit structures; and
attaching one or more elastic sheets to the auxetic and forming a stretchable substrate,
wherein the forming of the auxetic includes forming the auxetic which includes the plurality of unit structures having a shape corresponding to a chiral structure,
wherein the forming of the stretchable substrate includes:
filling a plurality of central holes related to central portions of the plurality of unit structures with elastic bodies; and
attaching the one or more elastic sheets to an elastic body corresponding to each of the central holes to form the stretchable substrate, and
wherein:
the one or more elastic sheets include a first elastic sheet attached to a first surface of the auxetic and a second elastic sheet attached to a second surface opposite to the first surface;
the forming of the stretchable substrate includes applying a lubricant on an inner peripheral surface of the central hole, bringing the first elastic sheet into contact with the first surface, filling each of the plurality of central holes with the elastic body in a downward direction of the second surface and curing each of the elastic bodies and the first elastic sheet, and bringing the second elastic sheet into contact with the second surface and curing each of the elastic bodies and the second elastic sheet; and
the lubricant is provided between the unit structure and the elastic body.