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Methods and apparatus for concurrent inkjet printing and defect inspection

A defect, equipment technology, applied in the field of equipment for testing defects

Inactive Publication Date: 2007-01-31
APPLIED MATERIALS INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the pixel wells into which ink is deposited can be extremely small when printing color filter patterns, the potential for defects is very high

Method used

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  • Methods and apparatus for concurrent inkjet printing and defect inspection
  • Methods and apparatus for concurrent inkjet printing and defect inspection
  • Methods and apparatus for concurrent inkjet printing and defect inspection

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Embodiment Construction

[0011] The present invention provides methods and apparatus for simultaneous inkjet printing and defect inspection. The inventors of the present invention have recognized that a problem with the efficient use of inkjet printing in the manufacture of eg color filters for flat panel displays is that it may not be possible to efficiently inspect a printed display device after the entire device has been printed. In accordance with the present invention, inkjet printing defects (e.g., insufficiently filled pixel wells, presence of ink (e.g., black matrix) on pixel well barriers, incorrect ink present in wells, Contamination particles in wells, etc.) can be provided in the inkjet printing system.

[0012] In some embodiments, the inspection system may include one or more cameras disposed on or near the inkjet printhead. Each inkjet printhead may have an associated camera. Alternatively, multiple cameras may be clustered on one inkjet printhead, or multiple cameras may be located r...

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PUM

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Abstract

A system for concurrent inkjet printing and defect inspection is provided. The system includes at least one print head adapted to deposit ink on a substrate, at least one imaging device adapted to scan the substrate, and a controller adapted to receive image data scanned by the imaging device during printing, determine if there are any printing defects on the substrate utilizing the processed image data, and transmit a control signal indicating a disposition of the substrate. The imaging device is adapted to scan the substrate during each print pass. Numerous other aspects are also disclosed.

Description

technical field [0001] The present invention relates generally to electronic device manufacturing and systems for printing, and more particularly, to apparatus and methods for inspecting for defects while printing color filters. Background technique [0002] The flat panel display industry has been attempting to use inkjet printing to manufacture display devices, specifically, color filters for flat panel displays. Because the pixel wells in which ink is deposited can be extremely small when printing color filter patterns, the potential for defects is very high. Accordingly, methods and apparatus for avoiding and detecting defects are desired. Contents of the invention [0003] In some embodiments of the present invention, a system for simultaneous inkjet printing and defect inspection is provided. The system includes: at least one printhead for depositing ink on a substrate; at least one imaging device for scanning said substrate; and a controller for receiving image da...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/01B41J29/393
CPCB41J2/16579B41J29/393G01N21/88B41J2/01
Inventor 上泉元罗伯特·巴查迟
Owner APPLIED MATERIALS INC
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