Fujitsu Corporation

Fujitsu Ten Limited

Kenji Nagase

Yoshiaki Hiratsuka

Shinichi Ohtsu

Tomoyuki Nakao

Sekiji Nishino

Yoshihiro Sawada

Makoto Mukai

Keisuke Nakamura

Takashi Yamagajo

Yoshinori Mesaki

Kai Nojima

Atsushi Takeuchi

Hiroshi Yoshida

Tetsuyuki Kubota

Takefumi Namiki

Toshiro Sato

Eiji Ohta

Kumiko Teramae

Takeshi Kishimoto

Yuji Suwa

Kazuaki Taya

Takashi Yamagajou

Shigeo Sakamoto

Masamichi Ohtake

Yasuhiro Hayakawa

Yasuo Matsubara

Tatsro Shima

Shuko Nishino

An information processing apparatus includes a memory, and a processor coupled to the memory and configured to receive a designation of a progression degree in which a circuit pattern displayed on a two-dimensional model of a printed circuit board is traced from a start point to an end point of the circuit pattern, display, on the two-dimensional model, the circuit pattern from the start point to a point corresponding to the progression degree on a three-dimensional model of the printed circuit board based on a setting of the start point and the end point of the circuit pattern, and display the circuit pattern of the two-dimensional model to distinguish a first pattern to form a part of the circuit pattern and a second pattern to form a part of the circuit pattern, the first pattern and the second pattern having portions overlapping each other.

Information processing apparatus and circuit pattern display method

A coupling distance y of a plurality of securing elements for coupling two members to construct a casing for accommodating a circuit board having electric components mounted thereon inside space surrounded by a conductor extracted from design data, an overlapping width x of overlap sections provided to the two members for coupling the two members with the plurality of securing elements, the overlap sections contacting to each other, and a wavelength &#x3bb; of electromagnetic noises generated from the electric components, are extracted. Then, a recommended coupling distance Y for the plurality of securing elements to attenuate the electromagnetic noises by a certain attenuation amount is calculated, based on the overlapping width x and the wavelength &#x3bb;, and the coupling distance y is compared with the recommended coupling distance Y. Thereby, verifications of an electromagnetic noise countermeasure can be made reliably without relying on settings by a user.

Non-transitory computer-readable recording medium having electromagnetic noise countermeasure verification program recorded thereon, information processing apparatus, and method of verifying electromagnetic noise countermeasure

A housing includes a first member that has a first conductor, a second member that has a second conductor and cooperates with the first member to accommodate a circuit board on which an electronic element is mounted, inside a space surrounded by the first conductor and the second conductor, and a plurality of connecting elements that are arranged at a predetermined arrangement interval y to fix the second member to the first member.

Housing and electronic device

A via adding method comprising: identifying a target area where a via is to be added in a printed circuit board; determining a starting point for starting a search for a location of the via in the target area; and moving a search point along a path in an intersecting direction that intersects a radial direction around the starting point while moving the search point in the radial direction and determining whether the via is to be added at a moved search point.

Via adding method

A non-transitory recording medium storing a program that causes a computer to execute a circuit board design assistance process. The circuit board design assistance process includes: extracting, from design information of a multilayer circuit board in which a plurality of layers are layered, a plurality of ground patterns in the multilayer circuit board that are within a predetermined distance from a path of a signal that flows in the multilayer circuit board; resolving a region at which the plurality of ground patterns are electronically separated as being a discontinuity region; and displaying the resolved discontinuity region.

Storage medium storing circuit board design assistance program, circuit board design assistance method, and circuit board design assistance device

A design support apparatus includes: an area identifying unit configured to identify a target area where a via is to be added in a printed circuit board; a determining unit configured to determine a starting point for starting a search for a location of the via in the target area; and a searching unit configured to move a search point along a path in an intersecting direction that intersects a radial direction around the starting point while moving the search point in the radial direction and to determine whether the via is to be added at a moved search point.

Support apparatus

A computer-readable recording medium having stored therein a program for causing a computer to execute a process for information processing comprising: performing, for a plurality of noise countermeasure design checks for a plurality of nets provided on a substrate, an initial noise countermeasure design check on each of the plurality of nets in an execution order determined, when one of the checks is passed, on the basis of other noise countermeasure design checks that may be skipped; and performing, if it is determined on the basis of at least a check result of a noise countermeasure design check which has been performed immediately before a corresponding check that there is a next noise countermeasure design check that may not be skipped in the execution order, the next noise countermeasure design check for each of the plurality of nets.

Method, device, and a computer-readable recording medium having stored program for information processing for noise suppression design check

A printed circuit board design assisting device includes a frame ground extraction section that extracts a ground pattern that is provided in a surface layer of a printed circuit board and that is to be connected to a metal component from design data on the printed circuit board stored in a design data storage section to store information for specifying the ground pattern in a data storage section, an electrostatic discharge determination section that performs a determination as to electrostatic discharge for the ground pattern specified from the information stored in the data storage section to store a determination result in a determination result storage section, and an output section that outputs the determination result stored in the determination result storage section.

Printed circuit board design assisting device, method, and program

An analyzing apparatus includes a result-data storing unit that determines whether result data that is calculated as a result of analysis is restorable by linear interpolation. If the result data is determined to be unrestorable by the linear interpolation, the result-data storing unit stores the result data in a predetermined storage unit. Moreover, the analyzing apparatus includes a data restoring unit that reads the result data from the storage unit. The data restoring unit performs the linear interpolation using the result data acquired, thereby restoring the result data.

Analyzing apparatus and data storage method

There is provided an electromagnetic field intensity calculator for calculating the intensity of electromagnetic field radiated from an electric circuit device based on a moment method. A conductor pattern obtained from CAD data is divided into a square mesh pattern. In the mesh pattern of the outline part, the entire region in the mesh pattern is filled with the conductor pattern according to the ratio of area between the conductor pattern region and the blank region, or subjected to correction for blanking, so that a mesh data model is automatically configured by mesh pattern group consisting of only squares conforming to the moment method and reflecting the outline of the conductor pattern.

Electromagnetic field intensity calculating method and apparatus

The apparatus for preparing data to generate simulation model extracts the analysis data of the parts required when a simulation is performed based on the CAD data of the parts forming a product to be processed, prepares data as a source of a simulation model of the product by combining the analysis data. The apparatus acquires the central coordinates of fine parts such as a screw, a screw hole, a boss and so on of the parts deleted from the analysis data, assigns a position name to them, and prepares data as a source of a simulation model by combining analysis data based on the position name and central coordinates.

Apparatus and method for preparing data to generate simulation model, and program thereof

A merging unit merges partial models into an entire model, and divides a grid of a parent hierarchy into grids of a child hierarchy based on hierarchical relationship of partial models, and an object selecting unit divides a grid of an object inclusion domain that includes an object selected from the entire model by a user to create a sub grid domain, and a domain selecting unit divides a grid of a domain selected from the entire model by the user to create the sub grid domain.

Method and apparatus for analyzing electromagnetic wave, and computer product

In a mutual immittance calculation apparatus, an input section inputs data of a model of an electric circuit apparatus, being a target for analysis of the electromagnetic-field strength and being divided into a plurality of patches. A mutual immittance calculation section calculates respective mutual immittance for combinations of patches corresponding to the main portion and to the additional portion. The mutual immittance calculation section uses a stored calculation result corresponding to the main portion when the model in which only the additional portion has been changed is calculated for a second time onward, and recalculates the mutual immittance corresponding to the changed additional portion.

Mutual immittance calculation program, mutual immittance calculation apparatus and method, and electromagnetic-field strength calculation program

A mesh is placed over an image of an element thereby dividing the image (element) into a plurality of solids. Each of the solids is then divided equally into the even number of parts. Inclusion-ratio determination-points, which are points where the straight lines and the mesh intercross, are decided. Moreover, it is determined whether the inclusion-ratio determination-points are inside or outside of the element. An analytical model for the element is created based on whether the inclusion-ratio determination-points are inside or outside of the element.

Analyzing apparatus, model creating method, and computer product

A vent grid has parallel first electrically-conductive members and parallel second electrically-conductive members intersecting with the first electrically-conductive members. The intersection between the first and second electrically-conductive members is forced to have a larger cross-sectional area. The characteristic impedance thus increases. The electric current flowing through the first and second electrically-conductive members turns over at the boundary between the intersection and the first and second electrically-conductive members. The flow of the electric current is in this manner interrupted. Accordingly, the vent grid fails to induce electromagnetic wave. Moreover, the electrically-conductive piece is merely located at a corner of the opening. Decrease in the percentage of the opening is thus suppressed to the utmost per a unit area. A sufficient airflow can be established through the vent grid. Decrease in the cooling efficiency and performance can be suppressed.

Growing community of inventors

Kawasaki, Japan

Kenji Nagase