Abstract:
An inclined peripheral portion 103 having a tapered shape in a cross-sectional view, in which the thickness thereof is reduced toward the edge of an interconnection substrate 102, is provided at the edge of the interconnection substrate 102. In addition, inner layers 112 are provided such that the distance therebetween is reduced toward the edge of the interconnection substrate in the inclined peripheral portion 103. A first interconnection conductor 104 and a second interconnection conductor 105 are provided on both inclined planes of the inclined peripheral portion 103 so as to be electrically connected to each other at the leading end of the inclined peripheral portion 103.
Abstract:
A semiconductor device is provided including a semiconductor element having a circuit and at least one electrode of the circuit, a flexible substrate having at least one electrode pad and surrounding the semiconductor element, a conductor for connecting the electrode with the electrode pad, and a plurality of solder bumps on the electrode pad, wherein at least a first portion between a surface facing the solder bumps of the semiconductor element and the flexible substrate is not fixed by adhesion.
Abstract:
It is to provide a wiring board for a semiconductor integrated circuit package, which exhibits an excellent signal property and a high effect for decreasing the switching noise at the time of mounting an LSI of an area-array structure. In a multilayer wiring board for a package, which comprises, on a wiring layer of an LSI chip mount surface, a ground pad, a power supply pad, and a signal pad for mounting LSI chip, and a ground plane that extends around a group of those pads, the ground pad disposed on the inner side, among the above-described pads, is connected to the ground plane that surrounds the pad group through a connecting wiring.
Abstract:
An analysis method of designing transmission lines of an integrated circuit packaging board including an integrated circuit chip, a printed circuit board, and an interposer disposed between the integrated circuit chip and the printed circuit board. A reference data file having information for dividing a series of transmission lines into connecting sections and/or continuous sections and a division model file having information on analysis models of a connecting section and a continuous section is prepared. The connecting sections are extracted from the series of transmission lines with reference to connection information. Boundaries for dividing the series of transmission lines into sections is determined with reference to the reference data file to generate division models. The division models are synthesized to form a synthesized model of the series of transmission lines to analyze electrical characteristics of the series of transmission lines.
Abstract:
A semiconductor device is provided including a semiconductor element having a circuit and at least one electrode of the circuit, a flexible substrate having at least one electrode pad and surrounding the semiconductor element, a conductor for connecting the electrode with the electrode pad, and a plurality of solder bumps on the electrode pad, wherein at least a first portion between a surface facing the solder bumps of the semiconductor element and the flexible substrate is not fixed by adhesion.
Abstract:
There is provided a semiconductor device tester including (a) a tester substrate having the same structure as a structure of a substrate as a product except that a semiconductor device is not mounted on the tester substrate, (b) an electrically conductive sheet covering therewith a first area in which the semiconductor device is to be mounted on the tester substrate, the electrically conductive sheet being electrically insulating in a certain direction, and (c) a holder supporting a semiconductor device to be tested therewith, and compressing the semiconductor device onto the electrically conductive sheet to thereby electrically connect an externally projecting terminal of the semiconductor device to a connection terminal mounted on the tester substrate in the first area.
Abstract:
A high-frequency probe according to the present invention comprises a probe chip that has an end part that is pressed to an electrode and is covered by a electrically conductive outer enclosure, and slides in a vertical direction by an inner surface of this electrically conductive outer enclosure inside this electrically conductive outer enclosure. A signal conductive pattern is fixed inside this probe chip and is connected with a inner conductor having elasticity. The inner conductor can be bent in the vertical direction at a central part of a hole having an opening, which is sufficiently long in the vertical direction, in the center space of a ground conductor, which is fixed to an end part of the main block, when the inner conductor is pressed due to contact of the end part. In addition, the high-frequency probe has a thin shape of a maximum thickness in a transverse direction which is perpendicular to the vertical direction that is a direction of the probe being pressed to a device electrode. The maximum thickness is substantially equal to a pitch between device electrodes, and can be formed in the construction of unifying a plurality of high-frequency probes.
Abstract:
In a tip portion structure basically having a substrate, a plate spring, and a ground block, the substrate is attached to a signal line on a back surface of the substrate and is contacted on the tip with the signal electrode of the DUT placed on a device stage. The plate spring is made of a resilient material, placed on the front side of the substrate, and positioned to apply a pressure to the substrate. The ground block is positioned between the signal line and the device stage functioned as a ground electrode of the DUT. Alternatively, the tip portion structure further may have a ground plate or a ground surface formed of a conductive thin plate covering entirely the front surface of the substrate, and shaped to surround the signal line in cooperation with the ground block . A plurality of the signal lines may be arranged in parallel on the same plane of the substrate. Another tip portion structure is based on a coaxial cable to be cut from the center at a plane perpendicular to the axial direction thereof along one or more oblique plane. A metal ring fitted over a periphery of the coaxial outer conductor may be used.