Browsing by Author "Chao"

Now showing 1 - 6 of 6

Method of alignments of liquid crystal employing magnetic thin films
(2010-06-01)
Chao
;
Ru-Pin
;
Wu
;
Hsin-Ying
Alignments of liquid crystal are obtained. A transparent magnetic thin film provides a homeotropic alignment of liquid crystal molecules. Or, a homeotropic or homogeneous alignment having an adjustable pretilt angle is further obtained through rubbing the transparent magnetic thin film. The present invention has a simple procedure with a low cost. The present invention is used in equipment with a plasma source while providing high transmittance, hardness and insulation. And the transparent magnetic thin film has potential uses in the applications of non-contact multi-domain alignment without extra procedure for alignment treatment.
Selective area growth carbon nanotubes by metal imprint method
(2008-11-25)
Wu
;
YewChung Sermon
;
Chao
;
Chi Wei
;
Hou
Manufacturing methods of using a metal imprint technique for growing carbon nanotubes on selective areas and the structures formed thereof are provided. One of the manufacturing methods includes steps of forming a first substrate with tapered structures applied with a metal catalyst, imprinting a second substrate on the first substrate for being a growth substrate, and growing carbon nanotubes on the growth substrate. The other manufacturing method includes steps of forming a first substrate with tapered structures, imprinting the first substrate on a second substrate applied with a metal catalyst for forming a second growth substrate, and growing carbon nanotubes on the second grown substrate. And, the formed structures of the present invention include a substrate, plural carbon nanotubes, and plural imprinted vestiges.
Tunable terahertz wavelength selector device using magnetically controlled birefringence of liquid crystals
(2009-01-27)
Chao
;
Ru-Pin
;
Pan
;
Ci-Ling
;
Chen
The present invention provides a tunable terahertz (THz) wavelength selector device, which includes a fixed phase retarder, a tunable phase retarder and a pair of linear polarizers to form a unit. The fixed phase retarder and tunable phase retarder basically utilizes liquid crystals to provide phase retardation, moreover, utilizing birefringence phenomenon possessed by liquid crystals can provide adequate phase retardation. The fixed phase retarder utilizes horizontal orientation of liquid crystal cell to provide fixed phase retardation, while the tunable phase retarder however utilizes homeotropic liquid crystal cell and a rotatable magnet to provide a tunable phase retardation, wherein the tunable phase retarder can provide the positive or negative phase retardation relative to the fixed phase retarder, based on the direction of the magnet's rotating axes and totally use the entire tunable range into adjusting frequencies which can pass through. Besides, the present invention can also serially connect multiple units described above so as to achieve a narrow enough band-pass bandwidth.
Vertical organic light emitting transistor assembly and horizontal organic light emitting transistor assembly
(2010-09-07)
Meng
;
Hsin-Fei
;
Horng
;
Sheng-Fu
;
Chao
A vertical organic light emitting transistor assembly and a horizontal organic light emitting transistor assembly are provided. The vertical organic light emitting transistor assembly comprises a first/second vertical transistor and a first/second organic light emitting diode perpendicularly integrated with the first/second vertical transistor, respectively. The horizontal organic light emitting transistor assembly comprises a substrate, a third vertical transistor and a third organic light emitting diode. The third vertical transistor and the third organic light emitting diode are arranged abreast on the substrate. By integrating the organic light emitting diode and the vertical transistor into a unitary electronic element, the vertical transistor can efficiently drive the organic light emitting diode so that the organic light emitting transistor assembly can overcome limitations caused by existing manufacturing processes and adapt to extensive applications.
Vertical organic transistor
(2010-04-06)
Meng
;
Hsin-Fei
;
Horng
;
Sheng-Fu
;
Chao
A vertical organic transistor and a method for fabricating the same are provided, wherein an emitter, a grid with openings and a collector are sequentially arranged above a substrate. Two organic semiconductor layers are interposed respectively between the emitter and the grid with openings and between the grid with openings and the collector. The channel length is simply decided by the thickness of the organic semiconductor layers. The collector current depends on the space-charge-limited current contributed by the potential difference between the emitter and the openings of the grid. And the grid voltage can thus effectively control the collector current. Further, the fabrication process of the vertical organic transistor of the present invention is simple and exempt from using the photolithographic process.
Vertical organic transistor
(2010-08-10)
Meng
;
Hsin-Fei
;
Horng
;
Sheng-Fu
;
Chao
A vertical organic transistor and a method for fabricating the same are provided, wherein an emitter, a grid with openings and a collector are sequentially arranged above a substrate. Two organic semiconductor layers are interposed respectively between the emitter and the grid with openings and between the grid with openings and the collector. The channel length is simply decided by the thickness of the organic semiconductor layers. The collector current depends on the space-charge-limited current contributed by the potential difference between the emitter and the openings of the grid. And the grid voltage can thus effectively control the collector current. Further, the fabrication process of the vertical organic transistor of the present invention is simple and exempt from using the photolithographic process.