JP3630243B2 - Printed board design check processing device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a printed circuit board design check processing apparatus for performing a clearance check on whether or not a circuit net to be designed is suitable for a predetermined design reference value in a printed circuit board design CAD system.
[0002]
[Prior art]
In the clearance check process in the conventional printed circuit board design CAD system, the clearance check process is performed collectively after the circuit pattern design using the design reference value set for each circuit net in advance.
[0003]
FIG. 7 is a diagram for explaining a conventional circuit net clearance check processing method.
For example, in a printed circuit board design apparatus as shown in FIG. 7A, the wiring patterns of the circuit nets A, B, D, E, F, and G are already input, and then the circuit net C (wiring pattern C ₁ or C ₂ ) shall be entered.
[0004]
FIG. 7B is a diagram showing net information that defines the voltage value and gap value (allowable distance between circuit nets) of each circuit net. The voltage values of the circuit nets A, B, C, D, E, F, and G are 5V, 5V, 10V, 10V, 15V, 15V, and 15V, respectively, and the reference gap value of the circuit nets A and B is 0.2 mm. The reference gap value of nets C and D is 0.3 mm, and the reference gap value of circuit nets E, F, and G is 0.4 mm. These pieces of information are set in advance before starting the design.
[0005]
Gaps in the conventional method, when the designer inputs the wiring pattern C ₁ of the circuit net C, the circuit net C wiring pattern C ₁ and already input circuit nets A, B, D, E, F, and between G wiring pattern When the gap value between the circuit net C and another circuit net is smaller than any of the predetermined reference gap values, the clearance value is calculated and compared with a preset reference gap value. Judge as an error (design standard error) and notify the designer.
[0006]
For example, when the actual gap value between the wiring pattern of the wiring pattern _{C 1} and the circuit nets A circuit net C is 0.2 mm, the circuit network A, the reference value of the gap C, respectively 0.2 mm, 0.3 mm Therefore, the proper gap value in this case must be larger than 0.3 mm which is the reference gap value of the circuit net C. Therefore, the designer is notified of the clearance error.
[0007]
[Problems to be solved by the invention]
For example, consider designing the above-described printed board using a gap value based on a potential difference between circuit net wiring patterns. As shown in FIG. 7C, the gap value based on the potential difference is determined to be 0.3 mm if the potential difference between the circuit nets is 5V, and 0.4 mm if the potential difference is 10V. According to the reference gap value based on the potential difference, the gap value between the circuit net C (10V) and the circuit net A (5V) and between the circuit net C (10V) and the circuit net E (15V) has a potential difference of 5V. , 0.3 mm or more is sufficient.
[0008]
Here, for example, as shown in FIG. 7 (a), the wiring pattern C ₂ circuits net C, and 0.4mm gap value from the wiring pattern of the circuit nets A, gap value from the wiring pattern of the circuit nets E Is input at a position where 0.35 mm, the circuit net C has cleared the design criteria.
[0009]
However, according to the conventional method, since the reference gap value of the circuit net E is 0.4 mm, the gap value between the circuit net E and the circuit net C (0.35 mm) is smaller than the reference gap value set in the net information. There was a problem that although it became smaller and a clearance error actually occurred even though the standard of 0.3 mm was cleared, a correct check could not be performed.
[0010]
Also, with the conventional method, only one reference gap value can be set for a circuit net, so the gap value clearance check when the same circuit net differs depending on the elements (wiring patterns, lands, etc. constituting the circuit net). Could not do.
[0011]
Furthermore, in the conventional method, it was not possible to perform a check in consideration of the reference gap value due to the potential difference between the circuit nets interactively online during the design.
In addition, in the design of the printed board, it may be necessary to change the reference gap value for a predetermined part in the printed board. When changing the reference gap value, the reference gap value of each circuit net in the net information is changed. The reference gap value could not be switched during the design process.
[0012]
Further, in the conventional method, since only the gap value can be set, the designer cannot know and manage arbitrary information such as the reason why the gap value is set.
[0013]
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems, to provide flexibility in setting design standard information, and to appropriately perform a clearance check in printed board design.
[0014]
[Means for Solving the Problems]
FIG. 1 is a principle configuration diagram of the present invention. In the figure, 1 is a processing device, 2 is a display, 3 is an input device, 4 is a clearance check processing unit, 5 is a design information switching processing unit, 6 is a design information display processing unit, 7 is a design information storage unit, and 8 is a design. Represents information.
[0015]
The processing device 1 is an information processing device for designing a printed board including a CPU and a memory. The input device 3 is a means for inputting circuit network elements, design information 8 and the like, and comprises a keyboard or a mouse.
[0016]
The clearance check processing unit 4 checks whether or not the target circuit net satisfies at least the standard of the reference gap value according to the potential difference between each circuit net group according to the design information stored in the design information storage unit 7. It is a means for performing a clearance check process related to the design. Further, clearance checking processing unit 4 performs the interactive clearance checking process further comprises the design information switching processing unit 5.
[0017]
The design information switching processing unit 5 is means for switching and selecting a plurality of design reference information from the design information 8 stored in advance in the design information storage unit 7.
The design information display processing unit 6 selects the design information 8 such as circuit net group information, design reference information, net information, and arbitrary information stored in the design information storage unit 7 and displays it on the display 2 in response to a request from the operator. It is a means for displaying.
[0018]
The design information storage unit 7 is a storage unit such as an external storage device that stores the design information 8. The design information 8 includes design standard information including circuit net group information obtained by classifying a plurality of circuit nets according to at least an attribute relating to a voltage value and information on a reference gap value corresponding to at least a potential difference between each circuit group with respect to the circuit net group. , Network information about circuit nets, and arbitrary information attached to design standard information.
[0019]
[Action]
In the present invention, net group information obtained by grouping a plurality of circuit nets according to the attributes of the circuit nets and design standard information set for the net group information are managed. It is also possible to set a reference gap value for each element in the design reference information. As a result, during the design process, it becomes possible to perform a clearance check using a reference gap value corresponding to an element of design information in an interactive manner.
[0020]
Further, during the design process, a clearance check can be performed by switching a plurality of pre-stored design reference information.
Also, during the design process, net information such as the net name of a certain element, net group information such as the group name to which the circuit net belongs, design standard information such as design standard values, and arbitrary information such as comments are displayed on the display. .
[0021]
【Example】
In the following, the embodiment of the present invention is such that the circuit nets A, B, D, E, F, and G are already input and the circuit net C is input in the printed board as shown in FIG. For example, a case will be described in which the design is performed using the gap value considering the potential difference between the circuit nets as described above as the design reference information.
[0022]
Here, as shown in the net information of FIG. 2B, the voltage values of the circuit nets A, B, C, D, E, F, and G are 5V, 5V, 10V, 10V, 15V, 15V, and 15V, respectively. Suppose there was.
[0023]
FIG. 2C shows net group information in the present embodiment. Here, attention is paid to the voltage value as an attribute (condition) for classifying and grouping circuit nets. That is, based on the voltage value shown in FIG. 2B, the circuit net is divided into a G1 group (circuit nets A and B) having a voltage value of 5V, a G2 group (circuit nets C and D) having a voltage value of 10V, and a voltage value. Is divided into three groups of G3 groups (circuit nets E, F, and G) of 15 V, and the net group information is stored in the design information storage unit 7.
[0024]
Further, based on the net group information of FIG. 2C, as shown in FIG. 2D, a reference gap value obtained from a potential difference between each net group is defined for each element such as a wiring pattern, a land, and the like. And it memorize | stores in the design information storage part 7 as design reference | standard information. In FIG. 2D, element 1 represents the reference between the circuit net wiring pattern and the wiring pattern, element 2 represents the circuit net wiring pattern to the land standard, and element 3 represents the circuit net land to land standard. . In the example shown here, the reference gap value is set by the potential difference between the circuit nets. If the potential difference between the circuit nets is 5 V, the reference gap value is 0.3 mm, and if it is 10 V, the reference gap value is 0.4 mm. A common value is set for each element, but a different value can be set for each element.
[0025]
For example, in the element 1 that determines the reference between the wiring pattern and the wiring pattern, the reference gap values between G1 and G2 (potential difference 5V), between G2 and G3 (potential difference 5V), and between G1 and G3 (potential difference 10V) are each 0. .3 mm, 0.3 mm, and 0.4 mm, which are defined according to the potential difference. The element 2 that determines the reference between the wiring pattern and the land and the element 3 that determines the reference between the land and land are the same in this example.
[0026]
Further, as shown in FIG. 2D, the design standard information can be given arbitrary information such as a comment such as “potential difference 5V”.
In the printed board shown in FIG. 2A, the circuit net C is input at a position where the gap value between the circuit nets A and C is 0.4 mm and the gap value between the circuit nets E and C is 0.35 mm. The processing operation of will be described.
[0027]
First, predetermined net group information, design reference information, net information, and arbitrary information are fetched from the design information 8 stored in the design information storage unit 7. When the wiring pattern of the circuit net C is input during the design input by the designer, the clearance between the circuit net C input this time and the circuit nets A, B, D, E, F, G is inputted by the clearance check processing unit 4. The value is calculated for each element. Here, the gap value between the element of the circuit net C and the element of the circuit net A is 0.4 mm, and the gap value between the element of the circuit net C and the element of the circuit net E is 0.35 mm.
[0028]
Next, the group to which the circuit net C belongs is searched from the acquired net group information (G2 group), and the group to which the circuit net A belongs is similarly searched (G1 group). A reference gap value of 0.3 mm, which is a reference gap value between G1 and G2, is obtained from the design reference information, and compared with the gap value obtained by calculation, it is determined whether or not the reference gap value is cleared. In this case, since the actual gap value of 0.4 mm is larger than 0.3 mm, which is the reference gap value between G1 and G2, no error occurs. Similarly, a reference gap value 0.3 mm between G2 and G3 between the G2 group to which the circuit net C belongs and the G3 group to which the circuit net E belongs is obtained, and this is compared with the actual gap value 0.35 mm to obtain the clearance. Check. Thus, it can be seen that no error occurs between the circuit nets E-C.
[0029]
FIG. 3 is a diagram showing a processing flowchart of the clearance check processing unit in the embodiment of the present invention.
In step S1 of FIG. 3, the net group information, design criteria information, net information, and arbitrary information stored in the design information storage unit 7 are fetched.
[0030]
In step S2, it is determined whether or not the fetched design standard information is to be switched. If so, the process of step S3 is performed. If not, the process proceeds to step S4.
[0031]
In step S3, designation of new design standard information is input, switching to the design standard information is performed, and the process returns to step S1.
If the design reference information is not switched, elements such as a wiring pattern are input in step S4.
[0032]
Next, in step S5, the net information of the input element and the already input element is searched, and the gap value between the input element and the already input element is calculated.
In step S6, the corresponding group is searched from the net group information based on the net information obtained in step S5, and the gap value obtained in the process in step S5 is compared with the corresponding reference gap value of the fetched design standard information. To do. When the actual gap value is smaller than the reference gap value (passes the standard), the process returns to step S4. When the actual gap value is larger than the reference gap value (violates the standard), the process of step S7 is performed. Do.
[0033]
In step S7, a clearance error message is output.
Thereafter, the processes in steps S4 to S7 are repeated until the input of all elements is completed.
[0034]
In the present embodiment, since the design information switching processing unit 5 can re-import any design standard information from the design information storage unit 7 even during design input, the standard gap value can be switched at any time.
[0035]
FIG. 4 is a diagram for explaining processing by the design information switching processing unit 5 in the embodiment. As shown in FIG. 4, the design information storage unit 7 stores two design standard information “standard A (file name: KIKKU-A)” and “standard B (file name: KIKKU-B)”. Initially, when “Standard A (KIKAKU-A)” is incorporated ((1)) and switching of design standard information is instructed, an input frame for a file name is displayed on the display 2. When the input of the file name “KIKAKU-B” of “Standard B” in the gap value / file name column in the input frame, the design information switching processing unit 5 takes in “Standard B” ((2)). . Thus, the subsequent clearance check process is performed based on “Standard B”.
[0036]
Furthermore, the design information display processing unit 6 can display the net group information, design criteria information, net information, and arbitrary information stored in the design information storage unit 7 on the display 2 as needed.
[0037]
FIG. 5 is a diagram illustrating a process flowchart of the design information display processing unit in the embodiment.
In step S11 of FIG. 5, the type of information to be displayed is determined. If the information to be specified is the element to be displayed, the process of step S12 is performed. If the display target is other information (capture information). , Step S14 is performed.
[0038]
In step S12, an element to be displayed is specified. In step S13, the net information and net group information are taken from the design information storage unit 7, and all or part of the net information is displayed on the display 2.
[0039]
In step S14, all or part of the net group information, design criteria information, and arbitrary information fetched from the design information storage unit 7 is displayed on the display 2.
FIG. 6 is a diagram illustrating a display of design standard information in the embodiment. In FIG. 6, when a file name of design criteria information such as “KIKAKU-A” is input in the gap value / file name column in the input frame of the display 2, the design information display processing unit 6 The corresponding design standard information in the information storage unit 7 is taken in and displayed on the display 2. While being displayed, LINE0001, POWER001,... Are net group names. (NET001) is a net name. Here, as elements of the gap value, LTL indicates a gap value between land and land, LTP indicates a gap value between land and wiring pattern, and PTP indicates a gap value between wiring pattern and wiring pattern. A comment indicating the range of the potential difference is displayed as arbitrary information.
[0040]
As described above, in this embodiment, a plurality of circuit nets are recognized as one group and processed. Design criteria information such as a reference gap value can be set for this circuit net group. Design criteria information (gap value data) for each element can be set for the design criteria information for each group realized in this way. Furthermore, the designer can add arbitrary information to the design standard information for each group.
[0041]
Using these, design criteria information between groups can be checked for each element by online interactive processing when inputting printed circuit board design. It is also possible to switch standards (design standard information group) during design. Upon request, group information, design criteria information, and arbitrary information are displayed on the display during design.
[0042]
【The invention's effect】
As described above, according to the present invention, design criteria information such as a gap value considering conditions such as a potential difference between circuit nets can be checked by online interactive processing, which has the following effects.
[0043]
(1) Clearance check after design is unnecessary, and design time can be reduced.
(2) The proper clearance check eliminates post-design corrections, and the design time can be reduced.
[0044]
(3) Since the net group information, the design standard information, and arbitrary information for the net group information can be managed and referred to during the design, the information management work time can be reduced. In particular, the search time can be reduced as compared to the case where arbitrary information is managed separately.
[Brief description of the drawings]
FIG. 1 is a principle configuration diagram of the present invention.
FIG. 2 is a diagram illustrating an example of design information and processing operations in an embodiment.
FIG. 3 is a processing flowchart of a clearance check processing unit in the embodiment.
FIG. 4 is a diagram illustrating a processing operation of a design information switching processing unit in the embodiment.
FIG. 5 is a processing flowchart of a design information display processing unit in the embodiment.
FIG. 6 is a diagram illustrating an example of design criteria information display in the embodiment.
FIG. 7 is a diagram for explaining the processing operation of the prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Processing apparatus 2 Display 3 Input apparatus 4 Clearance check process part 5 Design information switching process part 6 Design information display process part 7 Design information storage part 8 Design information

Claims (5)

In a printed circuit board design CAD system using an information processing device,
Circuit net group information obtained by classifying a plurality of circuit nets according to at least a voltage value attribute, and design reference information set for the circuit net group, and information on a reference gap value corresponding to at least a potential difference between each circuit group Design information storage means for storing design standard information including
A printed circuit board design check process comprising: clearance check processing means for inspecting whether or not the target circuit net satisfies at least a reference gap value reference according to a potential difference between each circuit net group according to the design reference information apparatus. In the printed circuit board design check processing device according to claim 1,
The design information storage means holds a plurality of design standard information,
The printed circuit board design check processing device, wherein the clearance check processing means comprises design information switching processing means for switching design reference information to be used among a plurality of design reference information stored in the design information storage means. In the printed circuit board design check processing device according to claim 1 or 2,
A printed circuit board design check processing apparatus characterized in that the clearance check by the clearance check processing means is executed by online interactive processing. In the printed circuit board design check processing device according to claim 1, claim 2, or claim 3,
Design information display processing means for displaying design information stored in the design information storage means,
The printed circuit board design check processing device, wherein the design information display processing means further displays arbitrary information stored together with design reference information in the design information storage means. In the printed circuit board design check processing device according to claim 1, claim 2, claim 3 or claim 4,
The printed circuit board is characterized in that the design reference information is one or more of a reference gap value between wiring patterns, a reference gap value between wiring patterns and lands, and a reference gap value between lands and lands. Design check processing device.

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