Patent · US Active

Spatially variable dielectric layers for digital microfluidics

US11554374B2 · kind B2 · utility

0Cited by
77References
17Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJan 15, 2021
Grant dateJan 17, 2023
Priority date—
Expiry dateJul 26, 2041

Classification

  • Technology area (CPC B)Performing Operations; Transporting
  • CPC primaryB01L2400/0427
  • WIPO fieldChemical engineering
  • WIPO sectorChemistry

Abstract

A digital microfluidic device including an active matrix of propulsion electrodes controlled by thin-film-transistors. The device includes at least two areas of different propulsion electrode densities. One area may be driven by directly-driving the propulsion electrodes from a power supply or function generator. In the first, higher density region; a first dielectric layer covers the propulsion electrodes. The first dielectric layer has a first dielectric constant and a first thickness. In the second, lower density region, a second dielectric layer has a second dielectric constant and a second thickness covering the propulsion electrodes.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.