The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 2011
Filed:
Mar. 19, 2008
Yasuo Nishi, Hachioji, JP;
Yasuo Nishi, Hachioji, JP;
Konica Minolta Holdings, Inc., Tokyo, JP;
Abstract
A liquid ejection head which can fly a minute high viscosity droplet with high precision by a low drive voltage in electric field assist system which exhibiting excellent maintainability such as cleaning. The liquid ejection head () comprises a nozzle plate () provided with a nozzle () having a liquid supply opening () for supplying a liquid (L), an ejection opening () for ejecting the liquid (L), and a liquid supply passage for supplying the liquid (L) from liquid supply opening () to the liquid ejection opening (), a cavity () for storing the liquid (L), a pressure generating means for generating pressure in the cavity (), and an electrostatic voltage generating means for generating an electrostatic attraction between the liquid (L) and a substrate. The liquid supply opening side of the nozzle () is formed of a silicon layer (), the ejection opening side of the nozzle is formed of at least one resin layer () composed of thermosetting or photosensitive fluorine polymer having a volume resistivity of 10Ω or above and a dielectric constant of 3 or less, and the diameter of the nozzle () on the liquid supply opening side is larger than that of the nozzle on the liquid ejection side.