Patent Number: 6,310,641

Title: Integrated nozzle plate for an inkjet print head formed using a photolithographic method

Abstract: An integrated nozzle plate having a heater chip and nozzles, firing chambers and channels formed from several layers of resist material affixed to the heater chip. The nozzles, firing chambers and channels are formed in the resist material using a photolithographic method. The photolithographic method involves placing a negative resist layer directly on a silicon wafer heater chip. A protective layer is then placed on top of the negative resist layer to act as a mask. A positive resist layer is then placed on top of the protective layer. A first mask is placed on the positive resist layer. The integrated nozzle plate is then exposed to ultraviolet light and the positive resist layer is developed. The protective layer not covered by the positive resist layer is removed and a second negative resist layer is deposited thereon. A second mask is placed on the second negative resist layer. The first and second negative resist layers are exposed to ultraviolet light and the negative resist layers are developed. The resulting integrated nozzle plate is then mounted to a print head, connected to an ink reservoir and placed in an inkjet printer for use.

Inventors: Mrvos; James Michael (Lexington, KY), Sullivan; Carl Edmond (Versailles, KY), Murthy; Ashok (Tualatin, OR)

Assignee: Lexmark International, Inc.

International Classification: B41J 2/14 (20060101); B41J 2/16 (20060101); B41J 002/14 (); B41J 002/05 ()

Expiration Date: 10/30/2018