Optical Detection of Protrusive Defects on Thin-film Transistor

Mapping Intimacies ◽

10.20944/preprints201809.0463.v1 ◽

2018 ◽

Author(s):

Fu-Ming Tzu ◽

Jung-Hua Chou

Keyword(s):

Thin Film ◽

Thin Film Transistor ◽

Cost Effective ◽

Liquid Crystal Displays ◽

Maximum Error ◽

Color Filter ◽

Depth Of Field ◽

Fast Method ◽

Flat Panel Display ◽

Flat Panel

Protrusive defects on the color filter of thin-film transistor (TFT) liquid crystal displays (LCDs) frequently damage the valuable photomask. An fast method using side-view illuminations associated with digital charge-couple devices (CCDs) to detect the protrusive defect in the four substrates, which are the black matrix (BM), red, green, and blue. Between the photomask and substrate, the depth of field (DOF) is normally 300 μm for the proximity-type aligner; we select the four substrates to evaluate the detectability in the task. The experiment is capable of detecting measurements of 300 μm and even lower than 100 μm can be assessed successfully. The maximum error of the measurement is within 6% among the four samples. Furthermore, the uncertainty analysis of three standard deviations is conducted. Thus, the method is cost-effective to prevent damage for valuable photomasks in the flat panel display industry.

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Optical Detection of Protrusive Defects on a Thin-Film Transistor

Crystals ◽

10.3390/cryst8120440 ◽

2018 ◽

Vol 8 (12) ◽

pp. 440

Author(s):

Fu-Ming Tzu ◽

Jung-Shun Chen ◽

Jung-Hua Chou

Keyword(s):

Thin Film ◽

Thin Film Transistor ◽

Cost Effective ◽

Maximum Error ◽

Color Filter ◽

Depth Of Field ◽

Fast Method ◽

Blue Color ◽

Flat Panel Display ◽

Color Filters

Protrusive defects on the color filter of thin-film transistor (TFT) liquid crystal displays (LCDs) frequently damage the valuable photomask. A fast method using side-view illuminations with digital charge-coupled devices (CCDs) that filter out ultraviolet (UV)490 nm was developed to detect the protrusive defects of thin-film type in four substrates of the black matrix (BM), red, green, and blue color filters. Between the photomask and substrate, the depth of field (DOF) is normally 300 μm for the proximity-type aligner; we select the four substrates to evaluate the detectability in the task. The experiment is capable of detecting measurements of 300 μm, and measurements even lower than 100 μm can be assessed successfully. The maximum error of the measurement is within 6% among the four samples. Furthermore, the uncertainty analysis of three standard deviations is conducted. Thus, the method is cost-effective to prevent damage for valuable photomasks in the flat-panel display industry.

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Bistable Technology in Flat Panel Display: Principle and Progress

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.428-429.206 ◽

2010 ◽

Vol 428-429 ◽

pp. 206-211 ◽

Cited By ~ 1

Author(s):

Zi Qiang Huang

Keyword(s):

Thin Film ◽

Liquid Crystal ◽

Liquid Crystals ◽

Thin Film Transistor ◽

Manufacturing Cost ◽

High Grade ◽

Flat Panel Display ◽

Flat Panel ◽

Display Devices ◽

Light Interference

Active matrices often related with high grade display devices, due to application of the storage elements, typically thin film transistor (TFT). Because of the complex procedures in the manufacturing TFT, investment of the high value manufacturing equipments and clarification plants is necessary, hence increasing the manufacturing cost of the flat panel, and more importantly, causing the pollution of water and air. As the contribution of TFT array merely exists in supplying storage function for the pixels of the display panel, large efforts have been made to find suitable cells that have bistable effect, so as to substitute the effect of TFT. As the bistable cell is just the storage pixel, one could construct a bistable cell to skip the needs of TFT active matrices. The paper is to introduce currently available bistable display devices in the following field: liquid crystal bistable displays with cholesteric liquid crystals, which is an example to introduce the bistable technology; iMod display devices based on mechanic induced bistable and light interference, which shows the possibility to construct bistable display; and the display based on solid powder movement in air or in vacuum, so called liquid powder displays, which shows how to improve the existed display.

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Color filter for 10.4-in.-diagonal 4096-color thin-film-transistor liquid crystal displays

IBM Journal of Research and Development ◽

10.1147/rd.361.0043 ◽

1992 ◽

Vol 36 (1) ◽

pp. 43-50 ◽

Cited By ~ 4

Author(s):

T. Koseki ◽

T. Fukunaga ◽

H. Yamanaka ◽

T. Ueki

Keyword(s):

Thin Film ◽

Liquid Crystal ◽

Thin Film Transistor ◽

Liquid Crystal Displays ◽

Color Filter

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Electrically active organic and polymeric materials for thin-film-transistor technologies

Journal of Materials Research ◽

10.1557/jmr.1996.0198 ◽

1996 ◽

Vol 11 (6) ◽

pp. 1581-1592 ◽

Cited By ~ 83

Author(s):

Andrew J. Lovinger ◽

Lewis J. Rothberg

Keyword(s):

Thin Film ◽

Thin Film Transistor ◽

Polymeric Materials ◽

Drain Current ◽

Current Status ◽

Flat Panel Display ◽

Semiconducting Materials ◽

Flat Panel ◽

Technological Potential ◽

Potential Alternative

Organic and polymeric materzials have seen a tremendous growth in research in the last five years as potential electroactive elements in thin-film-transistor (TFT) applications. These are driven by the increasing interest in flat-panel-display applications, for which organic and polymeric materials offer strong promise in terms of properties, processability, cost, and compatibility with eventual lightweight, flexible plastic displays. In this review we summarize the current status of our knowledge on the science of these organic and polymeric semiconducting materials. Most of these are based on linear thiophenes, especially a-hexathienyl, which has elicited by far the most attention. Mobility values in the 10−2–10−1 cm2/Vs and especially source-drain current on/off ratios of up to 106 make this a highly promising potential alternative to amorphous silicon. Other thienyl compounds are also discussed, as are polymeric analogues. A brief discussion of technological potential, limitations, and problems that need to be overcome is given at the end.

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