Fluidic microsystem comprising field-forming passivation layers provided on microelectrodes

US7455758B2 · kind B2 · utility

Assignee

• PerkinElmer Cellular Technologies Germany GmbH · DE

Inventors

• Torsten Müller · Berlin, DE
• Thomas Schnelle · Berlin, DE

Key dates

• Filing date: Nov 26, 2003
• Grant date: Nov 25, 2008
• Expiry date: Nov 9, 2024

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01L2400/0415
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Described is a fluidic microsystem (100) including at least one channel (10) through which a particle suspension can flow; and first and second electrode devices (40, 60) which are arranged on first and second channel walls (21, 31) for generating electrical alternating-voltage fields in the channel (10); wherein the first electrode device (40) for field shaping in the channel includes at least one first structure element (41, 51); and the second electrode device (60) includes an area-like electrode layer (61) with a closed second electrode surface which includes a second passivation layer (70); wherein the effective electrode surface of the first structure element (41, 51), of which element (41, 51) there is at least one, is smaller than the second electrode surface; and the second passivation layer (70) is a closed layer which completely covers the second electrode layer (61).