US 11,844,175 B2
Stretchable substrate having improved stretch uniformity and method of manufacturing the same
Phillip Lee, Seoul (KR); SeungJun Chung, Seoul (KR); HeeSuk Kim, Seoul (KR); JeongGon Son, Seoul (KR); and SukJoon Hwang, Seoul (KR)
Assigned to Korea Institute of Science and Technology, Seoul (KR)
Filed by Korea Institute of Science and Technology, Seoul (KR)
Filed on Mar. 24, 2022, as Appl. No. 17/703,277.
Claims priority of application No. 10-2021-0193783 (KR), filed on Dec. 31, 2021.
Prior Publication US 2023/0217587 A1, Jul. 6, 2023
Int. Cl. H05K 1/02 (2006.01); H05K 1/03 (2006.01); H05K 3/00 (2006.01); A41D 1/00 (2018.01); A41D 1/06 (2006.01); A41D 13/00 (2006.01); A41D 13/05 (2006.01); A42B 1/08 (2006.01); A42B 1/22 (2006.01); A42B 1/041 (2021.01)
CPC H05K 1/0283 (2013.01) [H05K 3/00 (2013.01); H05K 2201/09063 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of manufacturing a stretchable substrate having improved stretch uniformity, the method comprising:
forming an auxetic including a plurality of unit structures, each of which has a shape corresponding to a re-entrant structure, which comprises:
a first through-hole positioned on a first side of the re-entrant structure;
a second through-hole positioned on a second side of the re-entrant structure, the first side and the second side face each other among a plurality of sides constituting the re-entrant structure;
a first protrusion positioned though the first through-hole and protruded outward from each of an upper surface of the first side and a bottom surface of the first side;
a second protrusion positioned though the second through-hole and protruded outward from each of an upper surface of the second side and a bottom surface of the second side; and
attaching one or more elastic sheets to the auxetic and forming a stretchable substrate, wherein the one or more elastic sheets are directly bonded to the first protrusion and the second protrusion, and the one or more elastic sheets are not directly bonded to an upper surface or a bottom surface of any side among the plurality of sides constituting the re-entrant structure.