Abstract: An improved printed circuit board (PCB) includes first and second substrates, which are disposed being distanced or spaced mutually and in which at least one or more semiconductor chips are mounted, and a signal transmission part for providing a signal transmission path between the first and second substrates, the signal transmission part being extended out of a region having a size smaller than a maximum size of the first substrate within the first substrate, and being extended in the second substrate. In disposing two substrates in a spaced-apart structure of upper and lower positions, a length of flexible printed circuit (FPC) connecting the two substrates can be reduced, and an impedance mismatching caused in use of the FPC can be reduced.

Abstract: Disclosed herein is a rigid flexible PCB having openings. The rigid flexible PCB includes a flexible section with flexibility and rigid sections being formed at the edges of the flexible section with mechanical stiffness. The flexible section comprises a flexible plane. The flexible plane comprises a base insulating layer; a wire conducting layer being adhered to one of the top side and the bottom side of the base insulating layer; and a plane conducting layer adhered to the other of the top side and the bottom side of the base insulating layer. The plane conducting layer has a plurality of openings being formed as a mesh structure. According to the rigid flexible PCB of the invention, the flexibility of the flexible section and the characteristic impedance of signal wire traces may be improved.

Abstract: Provided are a semiconductor chip package with attached electronic devices, and an integrated circuit module having the same. The semiconductor chip packages may include a supporting substrate, input/output bonding pads arranged on a first plane of the supporting substrate, and device bonding pads arranged on the edges of the first plane or portions of the first plane adjacent to the edges. Accordingly, the mount area of a printed circuit board may be reduced, efficient routing may be possible, and the occurrence of package cracks may be reduced and/or prevented.

Abstract: An improved printed circuit board (PCB) includes first and second substrates, which are disposed being distanced or spaced mutually and in which at least one or more semiconductor chips are mounted, and a signal transmission part for providing a signal transmission path between the first and second substrates, the signal transmission part being extended out of a region having a size smaller than a maximum size of the first substrate within the first substrate, and being extended in the second substrate. In disposing two substrates in a spaced-apart structure of upper and lower positions, a length of flexible printed circuit (FPC) connecting the two substrates can be reduced, and an impedance mismatching caused in use of the FPC can be reduced.

Abstract: The present invention discloses an RFID (Radio Frequency Identification) system for reading and writing an identification information of an RFID tag in a non-contacting manner using a radio frequency. In accordance with RFID system of the present invention, a threshold value of a comparator is adjusted in order to accurately detect a response signal dynamically generated according to an environmental condition including a distance between a reader and the tag.

Abstract: The present invention discloses an RFID (Radio Frequency Identification) system for reading and writing an identification information of an RFID tag in a non-contacting manner using a radio frequency. In accordance with RFID system of the present invention, a peak value of a response signal dynamically generated according to an environmental condition including a distance between a reader and the tag is detected, and an identification information provided from the tag is accurately read base on the peak value.

Abstract: The present invention relates to a thermostable enzyme with a 2.1 Å crystal structure of a propeller type comprising six external blades that encompass the outer boundary of the crystal and six internal calcium-binding sites that are embedded inside the above crystal. Each of the six blades comprises 4 or 5 anti-parallel &bgr;-strands, and the six calcium binding sites consist of 3 high-affinity calcium binding sites and 3 low-affinity binding sites, which are involved in the enzyme's thermostability and catalytic activity, respectively. The above-mentioned Ca2+ binding motifs are expected to be utilized in synthesizing highly thermostable proteins and the elucidation of active sites of an enzyme from a three-dimensional structure can help to design new enzymes having those sites with the aid of recent advanced technology of protein engineering.

Abstract: The present invention relates to a method for preparing the crystal of human derived TRAIL protein and TRAIL receptor protein sDR5 complex and the crystal of TRAIL-sDR5 complex prepared by the method. The present invention also TRAIL relates to a three-dimensional structure of TRAIL protein in the form of complex with TRAIL receptor sDR5 as well as TRAIL protein itself, and specific residues existed in the contact central region of AA″ loop. The three-dimensional structure of TRAIL-sDR5 complex and the specific residues in the AA″ loop of the present invention can be effectively used for not only the development of TRAIL protein having the better cytotoxic activity and having the improved receptor biding affinity, which specifically kills viral infected cells or cancer cells but also molecular strategy for regulating the binding specificity between TNF and TNFR family.

Abstract: The present invention relates to a thermostable enzyme with a 2.1 Å crystal structure of a propeller type comprising six external blades that encompass the outer boundary of the crystal and six internal calcium-binding sites that are embedded inside the above crystal. Each of the six blades comprises 4 or 5 anti-parallel &bgr;-strands, and the six calcium binding sites consist of 3 high-affinity calcium binding sites and 3 low-affinity binding sites, which are involved in the enzyme's thermostability and catalytic activity, respectively. The above-mentioned Ca2+ binding motifs are expected to be utilized in synthesizing highly thermostable proteins and the elucidation of active sites of an enzyme from a three-dimensional structure can help to design new enzymes having those sites with the aid of recent advanced technology of protein engineering.