Abstract:
PROBLEM TO BE SOLVED: To provide an improved multi-layer ceramic package. SOLUTION: The multi-layer ceramic package comprises a plurality of signal layers in which each of signal layers has one or a plurality of signal lines; a plurality of vias in which each of vias provides one of voltage (Vdd) power connection and ground connection (Gnd); at least one reference mesh layer abutting on one or a plurality of signal layers; and a plurality of via connecting coplanar type shield (VCS) lines having a first VCS line extending at a first side of a first signal line and a second VCS line extending at a second side facing the first side of the first signal line in a plurality of signal layers. Each of a plurality of VCS lines is connected to one or a plurality of vias arranged along a directional channel where the VCS line extends, and extends beyond the vias. Joint noise in the ceramic package can be reduced and impedance discontinuity can be controlled by an arrangement of VCS lines in relation to signal lines. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a circuit board capable of controlling the characteristic impedance of signal wiring, suppressing an increase in a resistance value of a ground layer and also exhibiting countermeasures against high-frequency wave interference. SOLUTION: The circuit board has strip structure or microstrip structure having a ground layer 6 and signal wiring 3a, 3b arranged on the ground layer via an insulator layer 2 wherein a conductive portion forming the ground layer is formed into a mesh-like conductor 6B having a large number of through holes at positions opposing the signal wiring, and the characteristic impedance of the signal wiring 3a, 3b is adjusted. A solid electrode region 6A where no through holes are formed is formed outside the mesh-like conductor 6B, thereby suppressing an increase in the DC resistance of the ground layer 6. When the thickness of the insulator layer 2 is t, a distance U between the signal wiring and the solid electrode region is set in a range of 20t≥U≥3t. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a wiring board, along with an electronic component device, capable of reducing "warping" of the wiring board which is caused by difference in thermal expansion factors, for implementation with high reliability. SOLUTION: The wiring board includes a wiring formation region where wiring layers are stacked by a plurality of numbers with an insulating layer in between, and an outer peripheral region B1 which is disposed around the wiring formation region and in which reinforcing patterns 22b, 24c, and 26c are formed in the layer identical with the wiring layer. The area rate of the reinforcing patterns 22b, 24c, and 26c against the outer peripheral region B1 is almost equal to that of the wiring layer against the wiring formation region, for each layer. The reinforcing patterns 22b, 24c, and 26c exist with no gap in the outer peripheral region B1 when viewing the wiring board in perspective manner from above. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
Improved noise isolation for high-speed digital systems on packages and printed circuit boards is provided by the use of mixed alternating impedance electromagnetic bandgap (AI-EBG) structures and a power island configured to provide ultimate noise isolation. A power island is surrounded by a plurality of mixed AI-EBG structures to provide a power distribution network. In this structure, the gap around the power island provides excellent isolation from DC to the first cavity resonant frequency which is determined by the size of the structure and dielectric material. One AI-EBG structure provides excellent isolation from the first cavity resonant frequency of around 1.5 GHz to 5 GHz. The other AI-EBG structure provides excellent noise isolation from 5 GHz to 10 GHz. Through use of this novel configuration of AI-EBG structures, a combination effect of the hybrid AI-EBG structure provides excellent isolation far in excess of 10 GHz. The AI-EBG structure is a metallic-dielectric EBG structure that comprises two metal layers separated by a thin dielectric material (similar to power/ground planes in packages and PCBs). However, in the AI-EBG structure, only one of the metal layers has a periodic pattern which is preferably a two-dimensional rectangular lattice with each element consisting of a metal patch with four connecting metal branches.
Abstract:
PROBLEM TO BE SOLVED: To provide an inkjet printer and a printing method using the same which can print a pattern having a plurality of orientations with uniform quality. SOLUTION: This inkjet printer includes: a first inkjet head 10 which prints in one direction; and a second inkjet head 20 which prints in the other direction intersected with the one direction. This printing method includes steps of: separating printing data into X-axis components and Y-axis components; printing the Y-axis components using the first inkjet head 10 printing in the Y-axis direction; and printing the X-axis components using the second inkjet head 20 printing in the X-axis direction. COPYRIGHT: (C)2010,JPO&INPIT