Ion beam alignment for liquid crystal display fabrication

Doyle, J. P.; Chaudhari, P.; Lacey, J.; Galligan, E.; Lien, S.-C. A.; Callegari, Alesandro; Lang, N. D.; Lu, Minhua; Nakagawa, Y.; Nakano, H.; Okazaki, Noriaki; Odahara, S.; Katoh, Y.; Saitoh, Yukito; Sakai, Kazumi; Satoh, Hiroyuki; Shiota, Yasuhiko

doi:10.1016/s0168-583x(03)00796-1

Cited by 47 publications

(12 citation statements)

References 7 publications

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“…Current LC devices such as displays require specific and predictable LC alignment characteristics [1][2][3][4][5] and future LC applications, such as in organic photovoltaics (OPV), will depend on effective alignment of novel materials systems [6]. In the latter case, for example the discotic and polymeric composite systems under development can be difficult to orient in electrically efficient geometries, a problem complicated by the nanoheterogeneity required for efficient PV performance.…”

Section: Introductionmentioning

confidence: 99%

Cooperative liquid-crystal alignment generated by overlaid topography

Maclennan

Clark

2011

Phys. Rev. E

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Nematic and smectic liquid crystals were introduced into micron-scale gaps between plates coated with polymer films nanoimprinted with parallel arrays of rectangular channels. Overlaying of the channels on the two plates close enough at a slight angle produces a mosaic of planar / homeotropic and hybrid alignments, showing that complex liquid crystal orientation patterns can be achieved by combining two simple topographic patterns. These alignment patterns are attributed to spatial variation of surface roughness and 3D topographic structure created by a sufficient proximity of the two patterns.

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Section: Introductionmentioning

confidence: 99%

Cooperative liquid-crystal alignment generated by overlaid topography

Maclennan

Clark

2011

Phys. Rev. E

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“…Many new alignment methods have been proposed to vanquish intrinsic problems of rubbing process. [1][2][3][4][5] Plasma beam alignment (PBA) technique is the most promising technique for large scale preparation among these different noncontact alignment methods. The plasma alignment method is similar to ion-beam treatment.…”

Section: Introductionmentioning

confidence: 99%

P‐137: Anchoring Energy Enhancement for Plasma Alignment Technology

Hsu

Lee

Chen

et al. 2009

Symp Digest of Tech Papers

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The oxygen plasma post‐treatment was adopted for alignment preparation in Ar plasma alignment process. The light leakage at the dark state was suppressed by the new treatment. The NEXAFS data suggested that the out of plane carbonyl groups have been regenerated under oxygen plasma post‐treatment. The polar anchoring energy was two times increased comparing to the Ar treated PI. The cell's EO properties by new plasma treatment were comparable to the rubbed PI surface.

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“…It is important to look for new alignment methods, specially the non-contact alignment methods. One of the alternative alignment methods, ion beam (IB) alignment, had been reported by an IBM group [3][4][5][6]. They have successfully realized this non-contact alignment technology by integrating low energy ion beam equipments and diamond-like carbon (DLC) thin films into LCD manufacturing processes.…”

Section: Introductionmentioning

confidence: 99%

Liquid crystal surface alignments by using films composed of magnetic nanoparticles

Pan

Hsieh

2008

SPIE Proceedings

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A method for liquid crystal surface alignment by using a one-step, ion beam sputtering on glass substrates is demonstrated. Pre-coating by polyimide is not necessary. We use a diode-type sputter to treat the glass substrates with Ar ion-beam. The homeotropic alignments for nematic liquid crystals are achieved. The alignments are characterized by using the polarizing optical microscope and the conoscope. To find out the alignment mechanism, the studies by using super conducting quantum interference device and scanning probe microscopy are carried out. The surveyed surface morphology reveals that the films are amorphous and composed of nanoparticles with dimensions around 30 nm. The magnetization anisotropy of the sputtered magnetic films is analyzed. The polar anchoring strengths of the coated films with different thicknesses are measured and compared with their saturation magnetization. We deduce that the homeotropic alignment is achieved due to the orientation of the diamagnetic nematogenic molecules in the magnetic field caused by the γ-Fe 2 O 3 ferrimagnetic thin films. A simple model of alternatively distributed magnetic moments with opposite direction is proposed. The profile of magnetic field strength near the surface is then calculated to compare with the measured alignment strength.

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Ion beam alignment for liquid crystal display fabrication

Cited by 47 publications

References 7 publications

Cooperative liquid-crystal alignment generated by overlaid topography

Cooperative liquid-crystal alignment generated by overlaid topography

P‐137: Anchoring Energy Enhancement for Plasma Alignment Technology

Liquid crystal surface alignments by using films composed of magnetic nanoparticles

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