Method and system for nozzle compensation in non-contact material deposition

• US 10,034,392 B2
• Filed: 10/19/2015
• Issued: 07/24/2018
• Est. Priority Date: 11/28/2006
• Status: Active Grant

• Current Assignee: XJet Ltd.
• Original Assignee: XJet Ltd.
• Inventors: Gothait, Hanan, Peleg, Ran Asher, Baharav, Ofir
• Primary Examiner(s): NGUYEN, LAM S
• Application Number:
  US14/886,251
• Publication Number:
  US 20160205787A1
• Time in Patent Office: 1,009 Days
• Field of Search: 347 13, 347 40, 347 43, 361600
• CPC Class Codes: B41J 2/16579 Detection means therefor, e.g. for nozzle clogging
• CPC Class Codes: B41J 2/16588 Print heads movable towards the cleaning unit
• CPC Class Codes: B41J 2/2139 Compensation for malfunctioning nozzles creating dot place or dot size errors generating single droplets or particles on demand by pressure, e.g. electromechanical transducers B41J2/045
• CPC Class Codes: B41J 2/2142 Detection of malfunctioning nozzles generating single droplets or particles on demand by pressure, e.g. electromechanical transducers B41J2/045, B41J2/05; jet deflection sensors B41J2/125; for cleaning purposes B41J2/16579
• CPC Class Codes: B41J 2/2146 for line print heads
• CPC Class Codes: B41J 2/515 line printer type
• CPC Class Codes: B41J 25/001 Mechanisms for bodily moving print heads or carriages parallel to the paper surface
• CPC Class Codes: H05K 3/46 Manufacturing multilayer circuits

Abstract

A method of printing is provided where printing is using a first printing unit having redundant nozzles. Then, the method may include stopping the printing with the first printing unit while continuing the printing with active nozzles of a second printing unit. The method may include inspecting the first printing unit and identifying faulty nozzles, then designating the faulty nozzles as inactive and designating inactive nozzles of the first printing unit as a new active nozzle. According to some embodiments the method may include moving the first printing unit to an inspection zone prior to inspecting while continuing the printing with active nozzles of a second printing unit and moving the first printing unit back to the printing zone after inspection and continuing the printing with the first printing unit.

Claims

1. A system for producing printed electronics by depositing conductive ink, the system comprising:

a housing configured to house at least one movable print unit and a motor configured to move the at least one movable print unit, wherein the at least one movable print unit includes a plurality of nozzles configured to deposit patterns of electrically conductive material on an object;

a conveyor configured to move the object relative to the housing;

a memory for storing a print file containing specifications of a printed electronics pattern; and

a controller configured to selectively move the conveyor in a manner enabling the electronics pattern to be printed on the object, wherein the controller is configured to cause printing of multilayered conductive lines forming a conductive path on the object in a single pass,

wherein the housing is further configured to house a plurality of movable print units, and each of the movable print units being independently movable relative to the other movable print units during printing and including one or more fixed print heads, and wherein positions of the plurality of movable print units are determined by an optimization calculation; and

wherein the optimization calculation takes into account;

specific image data; and

nozzle status data, wherein nozzle status data includes nozzle jet direction.

2. The system of claim 1, wherein the conveyor includes a platform defining a width of a print area.

3. The system of claim 1, wherein the housing is located in a fixed position facing the conveyor.

4. The system of claim 1, wherein the housing is configured to move the at least one movable print unit relative to the conveyor.

5. The system of claim 1 further includes a visual image detector, the visual image detector being configured to acquire images of droplets of the conductive material deposited from the plurality of nozzles indicating conditions of the plurality of nozzles.

6. The system of claim 1, wherein the housing is further configured to house a plurality of movable print units configured to move along a plurality of printing axes, and wherein at least two of the print axes overlap.

7. The system of claim 1, wherein the controller is further configured to:

designate a first subset of nozzles as active nozzles and a second subset of nozzles as inactive nozzles;

move the conveyor to locate the object underneath the first subset of nozzles; and

instruct the first subset of nozzles to print the electronics pattern on the object.

8. The system of claim 1, wherein the at least one movable print unit includes multiple movable print units and the controller is further configured to use data regarding relative strengths of the plurality of nozzles to determine a homogenized print head arrangement for the multiple movable print units.

9. The system of claim 1, wherein the at least one movable print unit includes multiple movable print units and the controller is further configured to select a first subset of print heads for depositing material on a substrate, while a second different subset of print heads is undergoing a maintenance procedure in a position outside of a print area.

10. The system of claim 1, wherein each line is printed using a repeating pattern of output.

11. The system of claim 1, wherein the optimization calculation comprises:

determining a homogenized print head arrangement for the plurality of moveable print units.

12. The system of claim 1, wherein the positions of the plurality of movable print units are capable of being dynamically changed during printing by the controller.