JP2007179415A - Cad system, multilayer pcb design method and cad program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a CAD system, a multilayer PCB design method and a CAD program, for efficiently designing a PCB with built-in parts. <P>SOLUTION: An image display device 100 comprises a main body 1 including an arithmetic device 5 for processing information and a storage part 6 for storing information, and an image display part 2, the storage part 6 and the image display part 2 being controlled by the arithmetic device 5. Information for determining whether internal arrangement is possible or not is stored in a part information DB 61 and a substrate information DB 60 is preliminarily stored, whereby an operator can arrange an internally arrangeable layer without his/her own consciousness or determination in operating the image display device 100. Consequently, the efficiency of PCB layout design can be enhanced while preventing a design mistake such as internal arrangement of a part not to be internally arranged. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a CAD system, a multilayer PCB design method, and a CAD program for designing a PCB (Printed Circuit Board) having a multilayer structure and capable of mounting components on an inner layer in a CAD (Computer Aided Design) system.

  As a conventional technique, there is a circuit board design method capable of securing a component housing space necessary for a mounted component and performing design easily when designing a multilayer PCB on CAD (for example, Patent Document 1).

According to this circuit board design method, it is possible to design a multilayer PCB by recognizing usually a two-dimensional PCB design as a three-dimensional, and setting a component accommodation space for a component mounted on an inner layer. When the board of the layer overlaps, it is mounted by opening a hole in the board, and it is automatically verified whether there is an overlapping part in all three directions of each mounted component and each wiring of the surface layer. This makes it possible to easily execute a complicated board design.
JP 2003-76732 A

  However, according to the conventional circuit board design method, for example, there is no consideration of board specifications such as restrictions on placement prohibition due to cost, component strength, etc., and the designer does layout design for board specifications. There is a problem that it is sometimes necessary to select a layer on which parts can be arranged.

  Therefore, an object of the present invention is to provide a CAD system, a multilayer PCB design method, and a CAD program that can easily execute a multilayer PCB design in consideration of board specifications.

(1) In order to achieve the above object, the present invention registers part information having an attribute as to whether or not it is a part that can be placed in an inner layer in a CAD system having a design function of a multilayer PCB (Printed Circuit Board). Component information registration means, board specification registration means for registering board specification data having information on whether or not components can be placed in any layer of the multilayer PCB, and component information registered by the component registration means. Circuit design means for creating circuit diagram data using the layout, and layout data for creating layout data for each layer based on the circuit diagram data created by the circuit design means and the board specification data registered by the board specification registration means Move the position of the arranged parts in the design means and the layout data created by the layout design means In this case, a CAD system is provided that includes display means for displaying only layout data of a layer on which the component can be arranged.

  According to such a configuration, when the multilayer PCB layout data is created, the operator visually displays the component by displaying only the layers that are not inconsistent in the component arrangement operation based on the component information and the board information. It becomes possible to confirm the restriction of arrangement.

(2) In order to achieve the above object, in the CAD system having the design function of the multilayer PCB, the component information registration means for registering the component information having the attribute of whether or not the component can be arranged in the inner layer. A board specification registration means for registering board specification data having information on whether or not components can be placed in any layer of the multilayer PCB, and a circuit diagram using the component information registered by the parts registration means. Circuit design means for creating data; layout design means for creating layout data for each layer based on circuit diagram data created by the circuit design means and board specification data registered by the board specification registration means; and In the layout data created by the layout design means, when moving the position of the placed part, the layout of the layer on which this part can be placed Providing a CAD system characterized by comprising display means for displaying only over data editable.

  According to such a configuration, in addition to the effect of (1), the component placement operation for each layer is controlled so as not to contradict based on the component information and the board information, so that the operator himself considers the component information and the board information. Multi-layer PCB layout data creation can be executed without increasing the work efficiency.

(3) In order to achieve the above object, according to the present invention, in the multilayer PCB design method, component information having an attribute indicating whether or not the component can be arranged in the inner layer is registered, and any layer of the multilayer PCB is registered. Board specification data having information on whether component placement is possible is registered, circuit diagram data is created using the component information registered by the component registration means, and the circuit diagram data and the board specification data are based on the circuit diagram data. The layout data of each layer is created, and when the position of the placed component is moved in the created layout data, only the layout data of the layer on which the component can be placed is displayed. Provide a design method.

  According to such a method, a design method having the effect (1) can be realized.

(4) In order to achieve the above object, the present invention has a parts information registration step for registering part information having an attribute indicating whether or not a part can be placed in an inner layer, and a part in any layer of the multilayer PCB. A board specification registration step for registering board specification data having information on whether or not placement is possible, a circuit design step for creating circuit diagram data using the component information registered in the component registration step, and the circuit design The layout design step for creating layout data for each layer based on the circuit diagram data created in the step and the board specification data registered in the board specification registration step, and the layout data created in the layout design step are arranged Displaying only the layout data of the layer on which this part can be placed when moving the position of the selected part Providing a CAD program characterized by comprising a step.

  According to such a program, a CAD program having the effect (1) can be realized.

  According to the present invention, it is possible to efficiently design a component built-in PCB.

  Embodiments of a CAD system, a multilayer PCB design method, and a CAD program according to the present invention will be described below in detail with reference to the drawings.

(Configuration of image display device)
FIG. 1 is a schematic configuration diagram of an image display device as an electronic apparatus according to an embodiment of the present invention.

  The image display device 100 includes a main body 1 composed of electronic components such as a CPU (Central Processing Unit) and an HDD (Hard Disc Drive), an image display unit 2 having a display screen 2A for displaying characters, images, and the like. A character input unit 3 having input keys 30 such as character keys and function keys and a mouse 4 as a pointing device are provided.

  FIG. 2 is a schematic configuration diagram of the image display apparatus according to the embodiment of the present invention.

  The image display device 100 includes a calculation device 5 that processes information, a main body 1 that includes a storage unit 6 that stores information, and an image display unit 2, and the storage unit 6 and the image display unit 2 are connected by the calculation device 5. It is controlled.

  The image display unit 2 includes a component information registration screen 20 for registering information held by the component on the logic circuit and the PCB layout, and a component selection screen 21a for selecting the component on the logic circuit. Including a circuit design screen 21, a board specification setting screen 22 a for inputting a PCB layout board specification, and a component placement layer selection screen 22 b for selecting a placement layer on which a PCB layout component can be placed. A layout design screen 22 for designing the screen is displayed.

  The arithmetic unit 5 includes a component information registration unit 50a that operates the component information registration screen 20 and includes a component information registration support unit 50 that controls the component information registration screen 20, and a component selection unit 51a that operates the component selection screen 21a. The layout design includes a circuit design support unit 51 that controls the design screen 21, a board specification setting unit 52a that operates the board specification setting screen 22a, a component selection unit 52b that operates the component placement layer selection screen 22b, and a component placement unit 52c. And a component placement support unit 52 that controls the screen.

  The storage unit 6 includes a board information DB 60 including a plurality of board specifications registered in advance, a part information DB 61 including a plurality of parts information registered in advance on the part information registration screen 20, and a part selected on the part selection screen 21a. Includes circuit diagram data 62 designed on the circuit design screen 21 including information data 62a, and layout data 63 designed on the layout design screen 22 including board specification data 63a set on the board specification setting screen 22a. is doing.

  The image display device 100 operates the arithmetic device 5 by operating the character input unit 3 and the mouse 4 to communicate information with the storage unit 6, and a desired image is displayed on the display screen 2 A of the image display unit 2. indicate.

(Operation of the embodiment)
The operation of the image display apparatus according to the embodiment of the present invention will be described below with reference to FIGS.

  FIG. 3 is a flowchart showing the PCB layout procedure of the image display apparatus according to the embodiment of the present invention.

  First, in the component information registration screen 20, the components that can be arranged on the inner layer of the board are registered in the component information DB 61 using the component information registration means 50a (S1). At this time, the number of layers that can be arranged and the electrical information of the parts are registered. Next, on the component selection screen 21a, the component information DB 61 is referred to by using the component selection means 51a, and logic circuit design is performed (S2). Next, a new board is created (forwarded annotation), and layout data 63 including PCB layout information is created from circuit diagram data 62 including logic circuit diagram information created in S2 (S3). Next, using the board specification setting means 52a on the board specification setting screen 22a, information on the layer on which the component can be placed related to the corresponding layout data 63 is registered in the board specification data 63a, or the corresponding board information is selected from the board information DB 60. (S4). Next, on the layout design screen 22, a component to be placed or moved is selected using the component selection means 52b (S5). Next, the component selected in S5 is referred to the component information DB 61 to determine whether the component placement support unit 52 can be built in (S6). Next, when it is determined in S6 that it can be incorporated (S6: YES), the board specification data 63a is referred to and an inner layer on which components can be arranged is obtained (S7). Next, the inner layer capable of component placement acquired in S7 is added to the options on the component placement layer selection screen 22b when performing component placement or component movement (S8). Next, an arrangement layer is selected from the options displayed on the component arrangement layer selection screen 22b, and a component arrangement process is performed by the component arrangement unit 52c (S9). If it is determined that the component cannot be incorporated (S6: NO), only the surface layer surface is displayed on the component arrangement layer selection screen 22b, and the component can be arranged only on the surface layer.

  FIGS. 4A and 4B are cross-sectional views showing specific examples of the PCB layout component selection screen according to the embodiment of the present invention.

  The example shown in FIG. 4 is a multilayer PCB configured such that an insulator 603 is sandwiched between a substrate 601 and a substrate 602, on the first surface 601a, the second surface 601b, the third surface 602a, and the fourth surface 602b. Can be provided with a pad 600a. The example shown in FIG. 4A is a result of referring to the component information of the component 600 in the component information DB 61 registered in S1 of FIG. 3 and the board specification data 63a registered in S4 of FIG. This is a case where the first surface 601a, the third surface 602a, and the fourth surface 602b are displayed as selectable layers on the layer selection screen 22b. The example shown in FIG. 4B is a case where the first surface 601a, the second surface 601b, and the fourth surface 602b are displayed as selectable layers on the component arrangement layer selection screen 22b.

(Effect of embodiment)
According to the embodiment described above, by storing information for determining whether or not the inner layer can be arranged in the component information DB 61 and the board information DB 60, the operator can arrange the inner layer when operating the image display device 100. The possible layers can be arranged without consciousness and judgment by themselves, so that the efficiency of PCB layout design can be improved, and it is possible to prevent design mistakes such as mistakenly arranging inner layer impossible components.

1 is a schematic configuration diagram of an image display device as an electronic apparatus according to an embodiment of the present invention. It is a schematic block diagram of the image display apparatus regarding embodiment of this invention. It is a flowchart which shows the procedure of the PCB layout of the image display apparatus regarding embodiment of this invention. (A) And (b) is sectional drawing which shows the specific example of the component selection screen of PCB layout regarding embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Main body, 2 ... Image display part, 2A ... Display screen, 3 ... Character input part, 4 ... Mouse, 5 ... Arithmetic unit, 6 ... Memory | storage part, 20 ... Component information registration screen, 21 ... Circuit design screen, 21a ... Component selection screen, 22 ... Layout design screen, 22a ... Board specification setting screen, 22b ... Component placement layer selection screen, 30 ... Input key, 50 ... Component information registration support unit, 50a ... Component information registration means, 51 ... Circuit design support , 51a... Component selection means, 52a... Board specification setting means, 52b... Component selection means, 52... Component placement support section, 52c .. component placement means, 60 .. board information DB, 61. Data, 62a ... Part information data, 63 ... Layout data, 63a ... Substrate specification data, 100 ... Image display device, 600a ... Pad, 600 ... Part, 601 ... Substrate, 601a ... First surface, 6 1b ... second face, 602 ... substrate, 602a ... third surface, 602b ... fourth surface, 603 ... insulator

Claims (6)

In a CAD system having a design function of a multilayer PCB (Printed Circuit Board),
A component information registration means for registering component information having an attribute of whether or not the component can be placed in the inner layer;
Board specification registration means for registering board specification data having information on whether or not component placement is possible in any layer of the multilayer PCB;
Circuit design means for creating circuit diagram data using the component information registered by the component registration means;
Layout design means for creating layout data of each layer based on circuit diagram data created by the circuit design means and board specification data registered by the board specification registration means;
In the layout data created by the layout design means, there is provided a display means for displaying only layout data of a layer on which the component can be arranged when the position of the arranged component is moved. system. In a CAD system having a design function of a multilayer PCB,
A component information registration means for registering component information having an attribute of whether or not the component can be placed in the inner layer;
Board specification registration means for registering board specification data having information on whether or not component placement is possible in any layer of the multilayer PCB;
Circuit design means for creating circuit diagram data using the component information registered by the component registration means;
Layout design means for creating layout data of each layer based on circuit diagram data created by the circuit design means and board specification data registered by the board specification registration means;
In the layout data created by the layout design means, there is provided a display means for displaying only the layout data of the layer on which the part can be arranged in an editable state when the position of the arranged part is moved. CAD system characterized by   3. The CAD system according to claim 1, wherein the layer on which the component in the display unit can be arranged is determined based on the board specification data and the component information.   The CAD system according to claim 1, wherein the board specification data in the board specification registration unit includes information on the number of layers that can be arranged and an arrangement surface. In a multilayer PCB design method,
Register part information with the attribute of whether or not it is a part that can be placed in the inner layer,
Register board specification data with information on which layers of the multilayer PCB can be used for component placement,
Create circuit diagram data using the component information registered by the component registration means,
Create layout data for each layer based on the circuit diagram data and the board specification data,
A method for designing a multi-layer PCB, wherein, in the created layout data, when moving the position of the arranged component, only the layout data of the layer on which the component can be arranged is displayed. In a CAD program having a design function of a multilayer PCB,
A component information registration step of registering component information having an attribute of whether or not the component can be placed in the inner layer;
A board specification registration step of registering board specification data having information on which layer of the multilayer PCB is capable of component placement;
A circuit design step for creating circuit diagram data using the component information registered in the component registration step;
A layout design step of creating layout data of each layer based on the circuit diagram data created by the circuit design step and the board specification data registered by the board specification registration step;
In the layout data created by the layout design step, a display step for displaying only layout data of a layer on which the component can be arranged when the position of the arranged component is moved is provided. program.

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