Microneedle chip and manufacturing method thereof
US11452853B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 21, 2016 |
| Grant date | Sep 27, 2022 |
| Priority date | — |
| Expiry date | Dec 18, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/756
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A microneedle chip and manufacturing method. The method comprises injecting, into a female mold, a fluid needle liquid, wherein forming cavities matching the shapes of needles of a microneedle chip are provided at the female mold and form a cavity array, injection inlets are provided at a surface of one side of the female mold, and air ejection openings are provided at a surface of another side of the female mold to form an air ejection surface; covering the air ejection surface of the female mold using a breathable film, and during injection, passing a gas through the breathable film so as to retain the liquid inside the forming cavities; curing the fluid needle liquid to form the microneedle chip, and demolding to obtain the same. By employing the air ejection openings and the breathable film, a liquid is retained while ejecting a gas, providing a favorable micro-injection effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.