Industrial Technology Research Institute

Syh-Yuh Cheng

Yun-Tien Chen

Ra-Min Tain

Shu-Jung Yang

Yu-Lin Lee

Shu-Fen Liao

Chia-Hsin Lin

Ching-Fang Yu

Tsun-Hsu Chang

Shu-Hui Cheng

Chin-Ching Lin

Mei-Ching Chiang

Jong-Pyng Chen

Chwung-Shan Kou

Kwo Ray Chu

I-Wen Liu

Hung-I Chang

Wei-Yuan Chiang

Chih-Yung Wang

Ling-Chieh Tai

Wen-Chin Yeh

Larry Roger Barnett

The invention provides a high module carbon fiber and a fabrication method thereof. The high module carbon fiber includes the product fabricated by the following steps: subjecting a pre-oxidized carbon fiber to a microwave assisted graphitization process, wherein the pre-oxidized carbon fiber is heated to a graphitization temperature of 1000-3000&#xb0; C. for 1-30 min. Further, the high module carbon fiber has a tensile strength of between 2.0-6.5 GPa and a module of between 200-650 GPa.

High modulus graphitized carbon fiber and method for fabricating the same

A chlorine, fluorine and lithium co-doped transparent conductive film is provided, including chlorine, fluorine and lithium co-doped tin oxides, wherein the chlorine, fluorine and lithium co-doped tin oxides have a chlorine ion doping concentration not greater than 5 atom %, a fluorine ion doping concentration not greater than 5 atom %, and a lithium ion doping concentration not greater than 5 atom %.

Chlorine, fluorine and lithium co-doped transparent conductive films and methods for fabricating the same

A composite mode transducer for dissipating heat generated by a heat generating element is disclosed. The composite mode transducer includes a transducing module and connection elements. The transducing module includes first and second transducing elements connected in parallel. The connection elements are connected to resonance nodes of the first and second transducing elements. The first and second transducing elements are driven by a multiple-frequency resonance circuit, to produce resonance vibration of composite modes at resonance vibration frequencies of the system. The resulting advantages by using the composite mode transducer are: elimination of local stress concentration, and enhancement of efficiency, endurance and stability of the system. Accordingly, drawbacks of the prior art are overcome. The present invention further provides a cooling device with the composite mode transducer.

Composite mode transducer and cooling device having the composite mode transducer

A quasi-optical material treatment apparatus includes a first mirror and a second mirror. The first mirror is arched, and has a focal point in a chamber distance, and a coupling port to receive a high power microwave from an external microwave source that travels along the chamber distance to output a strong field microwave beam. The second mirror and the first mirror jointly form a quasi-optical action chamber and are movable relative to each other to adjust the total chamber distance between the two. A material to be treated may be moved through a focusing zone (about one wavelength of the strong field microwave beam) of the strong field microwave beam to be treated rapidly and evenly.

Quasi-optical material treatment apparatus

A method for producing a single integrated device containing a plurality of passive elements. The method includes providing a semiconductive ferroelectric substrate, applying a diffusant onto the substrate, and thermally processing the substrate. The ferroelectric material is a substrate with polycrystalline structure or a thin film formed by Ba Sr TiO or Sr Ca TiO or combinations thereof. Thermal processing is performed by isothermal heating or pulse laser.

Method for producing a single integrated device containing a plurality of passive elements

A type of piezoelectric transformer (PT) which vibrates in length extensional mode is provided. The piezoelectric transformer (PT) has a piezoelectric substrate which has a first dimension, a second dimension and a third dimension with the first dimension being longest and the third dimension being shortest. The substrate has two polarization directions parallel to the first dimension near two terminals of the first dimension and at least two opposite polarization directions on a central portion of the substrate transversely to the first dimension. The substrate further has at least two electrodes on a portion horizontal to the first dimension. Comparing with traditional piezoelectric transformers, the new one can solve the polarization difficulties and reduce audio noise output without sacrificing the electrical properties or even have better voltage transformation characteristics.

Multi-mode adjustable piezoelectric transformer

A piezoelectric composite receiver for use in telephones comprising a front cover, a rear cover, and a transducer plate, which is provided with an piezoelectric layer so as to provide the function of an electroacoustic transducer. Each of the front cover and the rear cover has an elliptically-shaped protrusion for clamping the transducer plate therebetween. The elliptically-shaped protrusions allows the transducer plate to freely vibrate in the frequency range of interest (i.e., between 300 Hz and 3,400 Hz), while the sound in the high frequency region (above 3,400 Hz) is effectively suppressed. The front cover and the rear cover are made of a plastic material using an injection molding process, and either the front cover or the rear cover, or both, are provided with an ultrasonic welding loop, which allows the receiver to be affixed using an ultrasound welding device. An induction coil can be imbedded in the outer periphery or an upper portion of the front cover which can be coupled to a hearing aid so as to allow an hearing impaired to utilize a telephone which utilizes the piezoelectric composite receiver.

Piezoelectric composite receiver

An apparatus for poling a piezoelectric ceramic includes a first and a second electrode which are connected to a DC power supply and spaced away from one another at a certain distance, and an insulated medium provided between the first and second electrodes. The second electrode is adapted to carry the piezoelectric ceramic which is spaced away from the first electrode. In this way, a piezoelectric ceramic can be poled by a poling field created between the first and second electrodes and prevented from being scraped by the first electrode or damaged by the ripples caused by an unstable voltage because of the separation of the piezoelectric ceramic to be poled from the first electrode and the buffering effect caused by the insulated medium between the first and second electrodes. In addition, the second electrode may be specifically in the form of a power-driven metal conveyor so that the piezoelectric ceramic to be poled can continuously pass through and be poled by the poling field.

Growing community of inventors

Hsinchu, Taiwan

Syh-Yuh Cheng