Abstract: The present disclosure provides a printed circuit board (PCB) comprising a first ground layer extended in one direction a first dielectric layer laminated on the first ground layer and extended in the same direction as that of the first ground layer; a signal transmission line laminated on the first dielectric layer and extended in the same direction as that of the first dielectric layer; and a plurality of first ground patterns formed by etching a surface of the first ground layer in an axial direction thereof at a predetermined interval in a line, wherein the plurality of first ground patterns expose the first dielectric layer.

Abstract: A probe card of a semiconductor test apparatus having a plurality of space transformers supporting probe units of the probe card is provided. A probe card of the present invention includes a plurality of probe units, each comprising a guide member and at least one probe secured by the guide member and contacting a chip pad to be tested; a plurality of space transformers arranged below the respective probe units, each space transformer having wires electrically connected to lower terminals of the probes; a frame having a plurality of guide holes for fixedly positioning the respective probe units; an interposer array arranged below the space transformers for supporting the space transformers, interposer array comprising electrical connection means for supplying test signals to the wires of the space transformers; and a printed circuit board arranged below the interposer array for supporting the interposer array and electrically connected to the electrical connection means for supplying the test signals.

Abstract: A coaxial connecting device is provided for making an electrical connection between a coaxial cable and a device under test. A coaxial connecting device electrically connects a coaxial cable to a signal pad and a ground pad. The coaxial contractor of the present invention includes a signal pin for electrically connecting a signal conductor of the coaxial cable to the signal pad; a ground connector for electrically connecting a ground conductor of the coaxial cable to the ground pad; a cylindrical guide tube surrounding the ground conductor for elastically contacting the ground connector while maintaining a predetermined distance with the signal pin; and a dielectric member surrounding a part of the signal pin for electrically isolating the cylindrical guide tube and the signal pin from each other and coaxially maintaining the guide tube and the signal pin.

Abstract: A probe block mounted on a probe card is provided for achieving fine pitch probes. A probe block for a probe card of a semiconductor test device according to the present invention includes a guide member and a probe. A guide member includes pairs of upper and lower holes and middle holes each interconnecting the upper and lower holes of each pair. A probe includes a first pin tip protruded through a corresponding upper hole for contacting a pad of a device to be tested and a second pin tip protruded through a corresponding lower hole for transferring an electrical signal to the device and a bridge part situated within the middle hole for interconnecting the first and second pin tips. The upper, lower, and middle holes allow the probe to elastically moves in vertical direction. The probe block of the present invention is advantageous in that the probes are supported by guide members so as not to be bent while maintaining a fine pitch.

Abstract: A coaxial connecting device is provided for making an electrical connection between a coaxial cable and a device under test. A coaxial connecting device electrically connects a coaxial cable to a signal pad and a ground pad. The coaxial contractor of the present invention includes a signal pin for electrically connecting a signal conductor of the coaxial cable to the signal pad; a ground connector for electrically connecting a ground conductor of the coaxial cable to the ground pad; a cylindrical guide tube surrounding the ground conductor for elastically contacting the ground connector while maintaining a predetermined distance with the signal pin; and a dielectric member surrounding a part of the signal pin for electrically isolating the cylindrical guide tube and the signal pin from each other and coaxially maintaining the guide tube and the signal pin.

Abstract: A board mount type right angle coaxial connector has a cylindrical body and a main body containing a dielectric and an air dielectric, respectively. The bodies are connected to each other at a right angle. The coaxial connector further has a conductor surrounded with the dielectric and the air dielectric. The conductor has also a right-angle structure and is protruded from a front side of the main body. An inner wall of the main body has a decreasing width and the conductor has a decreasing diameter. The coaxial connector may further has a fixing member for preventing pin rotation, a impedance matching ring, and ground supporters for mounting on the board.

Abstract: Disclosed coaxial connector comprises (A) a pin having a soldering section to be soldered to a central conductor of the coaxial cable and a contact section extending from the soldering section and electrically interconnected to a male connector, (B) a dielectric block having a cylindrical portion including a through hole to which the pin is inserted, a body of chamfered structure and being connected to the cylindrical portion, and a cover leg extending from the body in an opposite direction from the cylindrical portion, and (C) a main body having a cylindrical portion including a hole for receiving the dielectric block to which the pin is inserted, a fastening flap for holding the coaxial cable, and a body electrically interconnected to the ground conductor of the coaxial cable.

Abstract: A board mount type right angle coaxial connector has a cylindrical body and a main body containing a dielectric and an air dielectric, respectively. The bodies are connected to each other at a right angle. The coaxial connector further has a conductor surrounded with the dielectric and the air dielectric. The conductor has also a right-angle structure and is protruded from a front side of the main body. An inner wall of the main body has a decreasing width and the conductor has a decreasing diameter. The coaxial connector may further has a fixing member for preventing pin rotation, a impedance matching ring, and ground supporters for mounting on the board.

Abstract: Disclosed coaxial connector comprises (A) a pin having a soldering section to be soldered to a central conductor of the coaxial cable and a contact section extending from the soldering section and electrically interconnected to a male connector, (B) a dielectric block having a cylindrical portion including a through hole to which the pin is inserted, a body of chamfered structure and being connected to the cylindrical portion, and a cover leg extending from the body in an opposite direction from the cylindrical portion, and (C) a main body having a cylindrical portion including a hole for receiving the dielectric block to which the pin is inserted, a fastening flap for holding the coaxial cable, and a body electrically interconnected to the ground conductor of the coaxial cable.

Abstract: The present invention relates to a connection structure in which an inner conductor is combined with a detachable impedance compensator as well as a coaxial connector, an extendible pin and an impedance compensator used for the connection structure. Further, this invention relates to a microwave device connected both electrically and mechanically with the connection structure. An impedance compensation thereof means compensates electric discontinuities between the inner conductor and the extendible pin by mechanical arraying with a microwave device to be combined with the connection structure, whereby the protrusion formed at the impedance compensation means satisfies the conditions, b?a/5 and c?2b, when diameter of the impedance compensation means is a, thickness thereof is b, and size of the protrusion is c.