US 11,938,308 B2
Implantable microneedle and manufacturing method therefor
Seung Yun Yang, Miryang-si (KR); Sang-Gu Yim, Busan (KR); and Young Jun Hwang, Mungyeong-si (KR)
Assigned to SNVIA CO., LTD., Busan (KR)
Appl. No. 16/959,620
Filed by SNVIA CO., LTD., Busan (KR)
PCT Filed Jan. 17, 2019, PCT No. PCT/KR2019/000710
§ 371(c)(1), (2) Date Jul. 1, 2020,
PCT Pub. No. WO2019/143152, PCT Pub. Date Jul. 25, 2019.
Claims priority of application No. 10-2018-0006765 (KR), filed on Jan. 18, 2018.
Prior Publication US 2020/0368452 A1, Nov. 26, 2020
Int. Cl. A61M 37/00 (2006.01); A61M 5/32 (2006.01); B81B 1/00 (2006.01); B81C 1/00 (2006.01)
CPC A61M 5/3286 (2013.01) [B81B 1/008 (2013.01); B81C 1/00111 (2013.01); A61M 2207/00 (2013.01); B81B 2201/055 (2013.01); B81B 2203/0361 (2013.01); B81C 2201/0197 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for manufacturing a microneedle having a coating layer on a surface of a tip, the method comprising:
dripping a swellable polymer solution on the tip of the microneedle to form the coating layer thereon;
wherein the method further comprises, before forming the coating layer, coating a sacrificial layer solution on a surface of the tip of the microneedle to form a sacrificial layer thereon,
wherein forming the coating layer includes dripping the swellable polymer solution on the sacrificial layer to form the coating layer thereon,
wherein the sacrificial layer has been dissolved in water before the swellable polymer based coating layer has been dissolved in water.