Abstract:
A method of manufacturing a wafer-level flip chip package is capable of being used to produce a flip chip package by directly coating a flip chip package using anisotropic conductive adhesives (ACA) and non conductive adhesives (NCA) in a solution state as a double layer on a wafer. The method can be used to manufacture a non-conductive mixed solution and a conductive mixed solution and directly coat them on a substrate, such that it is possible to: increase productivity; simplify a manufacturing process; suppress a shadow effect; easily perform thickness control that is difficult with the anisotropic conductive adhesive paste or the non-conductive adhesive paste; and obtain the non-conductive layer and the anisotropic conductive layer in an initial state of a B-stage with a level not losing latent of hardening through a simple drying process to volatilize an organic solvent. Above all, the non-conductive layer and the anisotropic conductive layer is sequentially stacked on the substrate formed with the non-solder bump, making it possible to make the selectivity of electrical conduction and the stability of a connection process excellent, shorten process time and costs, and dramatically reduce consumption of the conductive particles which account for a large portion of total production costs.
Abstract:
The present invention relates to a manufacturing method of an anode for a solid oxide fuel cell (SOFC), an anode, and a SOFC, in which an anode is formed by stacking sheets having a plurality of holes, and the holes are used as gas diffusion paths through which fuel gas can be facilely diffused, and some of the holes are filled with a reinforcement member or a current collecting member, thereby improving a cell strength and increasing a current collecting performance and thus an efficiency of the SOFC.
Abstract:
Disclosed herein is a differential amplifier using body-source cross coupling. In a common gate differential amplifier in which common gate amplifiers are implemented in a differential structure, since the bodies of the common gate amplifiers are cross coupled to the sources of the opposite common gate amplifiers, it is possible to increase transconductance due to body effect to improve a gain. Since the potential of the body is equal to that of the source in a DC mode, a breakdown voltage reduction problem is alleviated.
Abstract:
Provided is a communication system for ultra wide band impulse communication, and more particularly, to a communication apparatus and method that can be used in a sensor network or a low-rate wireless personal area network. To be more specific, the present research suggests a transmitter employing multi-coded bi-orthogonal pulse position modulation/demodulation and a method thereof. The transmitter of the present research provides: a serial-to-parallel converter for convening L-bit serial data to be transmitted into parallel data by performing grouping on the L-bit serial data; a multi-coder for generating a multi-coded symbol by multiplying the parallel data by total L orthogonal codes of length Ns; a bi-orthogonal pulse position modulator for positioning the multi-coded symbol in a predetermined pulse period and performing biorthogonal pulse position modulation; and a pulse generator for multiplying an output signal of the bi-orthogonal pulse position modulator by a predetermined pulse and outputting an output signal.
Abstract:
A tree data structure is stored in a flash memory device by storing a leaf node and an index node comprising a pointer to the leaf node in a same page of the flash memory device, which may be read on a per-page basis. A modified version of the leaf node and a modified version of the index node may be stored in a new page of the flash memory device when, for example, a key value is added to or deleted from the leaf node.
Abstract:
Disclosed are carbon nitride (C1-xNx) nanotubes with nano-sized pores on their stems, their preparation method and control method of size and quantity of pores thereof.The present invention further has an object of providing the C1-xNx nanotube with pores having the size of not more than 1 nm over structure of the nanotube and a method for preparing the same.Another object of the present invention is to provide the control method of the size and quantity of pores with size of not more than 1 nm in the preparation of the C1-xNx nanotube with the pores over structure of the nanotube.The present invention can produce the C1-xNx nanotube with nano-sized pores by reacting hydrocarbon gas and nitrogen gas through plasma CVD in the presence of metal catalyst particles, wherein x ranges from 0.001 to 0.2.
Abstract:
An object of the present invention is to improve abrasion-resistance and spin performance of a golf ball having a polyurethane cover.The golf ball of the present invention is a golf ball having a core and a cover covering the core. The cover contains a layered silicate and a polyurethane resin having a secondary or a tertiary amine structure in a molecular chain thereof. In the present invention, the polyurethane resin used as a resin component constituting the cover has a secondary or tertiary amine structure in a molecular chain. Thus, it has a strong interaction with the layered silicate, and a reinforcing effect of the filler becomes even higher. As a result, abrasion-resistance and spin performance of the resultant cover are improved.
Abstract:
The present invention relates to a processing method of data stream using Border Monitoring Query, and more particularly a monitoring method and a system for data streams which are a large volume of data and continuously generated such as financial ticker, GPS data or a ubiquitous sensor network (USN).The objectives of the present invention are to process a large number of BMQs over data streams in high-performance and scalable manner. For this purpose, the invention presents BMQ-Index, a scalable and high performance data stream monitoring framework. The main idea of BMQ-Index is shared and incremental processing. For shared processing, BMQ-Index adopts a query indexing approach, thereby achieving a high level of scalability. Once BMQ-Index is built on registered queries, only relevant queries are quickly searched for upon an incoming data. For incremental processing, BMQ-Index employs an incremental access method, i.e., an index structure to store delta query information and an incremental search algorithm. Thus, successive BMQ evaluations are greatly accelerated.
Abstract:
The present invention relates to a method for producing hydrogen by batch process capable of replacing the existing complex continuous organic waste treatment system by using pretreated organic waste not only as a substrate but also an inoculum. According to the present invention, the existing complex continuous process can be changed into a simple batch process, thereby reducing the installment costs and operational costs. It is possible to obtain economic operation because a long initial start-up period is not required.
Abstract:
A T-shaped gauge and acetabular cup navigation system and acetabular cup aligning method using the T-shaped gauge, which can measure anantomical landmarks of the pelvis at the same time, calculate an anterior pelvic plane from the measured value, calculate a transformed anterior pelvic plane by converting the anterior pelvic plane in comparison with a pelvic reference frame, and set a direction vector of an acetabular cup on the transformed anterior pelvic plane, thereby exactly inserting the acetabular cup into the acetabulum without regard to movement of the pelvis.