JP2000099558A - Design rule checking method/system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a design rule checking method/system which can prevent erroneous detection and the lack of detection and can securely detect a real design rule error at high speed. SOLUTION: A special specification data input processing means 203 inputting a design special specification which a design system designates/generates, a design data input processing means 205 inputting design data, a pseudo judgment processing means 206 which artificially approves and denies a design rule check flag from the area values of inputted special specification data 202 and design data 204 and a relation with a parameter value, a design reference data input processing means 208 inputting a design reference file 207 where a design rule is stored, a design rule check processing means 209 checking the design rule and a design rule check result output means 210 displaying and outputting a design rule check result, a real design rule check error and a recognition pseudo error list are installed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a design rule checking method and system, and more particularly, to any CAD system.
The present invention relates to a design rule check method and system capable of eliminating a pseudo error that can occur at the time of design rule check in a system.

[0002]

2. Description of the Related Art Generally, in a conventional CAD design, as shown in FIG. 9, design data 901 by CAD conforms to a design rule (design standard) stored in a design standard file 902. A design rule check 903 as to whether or not the check is performed is performed, and a check result 904 is output.

[0003] Here, there is no problem if the design specifications are consistently uniform. However, in the case of a design including a special specification in which a design locally violates a general design rule, the design rule check 903 is performed. The check result 904 output after the execution is mixed with a pseudo error. Therefore, it is necessary to distinguish a true error from a pseudo error.

[0004] As described above, a pseudo error occurs in a portion where a layout or the like is performed based on a design including a special specification, and unlike a true error, it is not an original error. There is no need to change layout data or the like.

On the other hand, since a true error is an original error, the layout data and the like need to be changed. However, if the design rule check 903 is performed again after the layout data and the like are corrected, no error is output.

However, there is no problem with the layout of the pseudo error, so that the layout data and the like are not changed. When the design rule check 903 is performed again, the same error occurs as in the previous case, and the design rule check is performed. Each time step 903 is performed, a similar pseudo error continues to occur.

For example, Japanese Patent Application Laid-Open No. 9-44 shown in FIG.
The conventional design rule check system described in Japanese Patent Application Publication No. 546 discloses inputting a mask pattern data 1001 and a design reference file 1002 storing design rules to check design rules of a semiconductor integrated circuit. Design rule check processing 10 for outputting an error to work file 1004
03, the mask pattern data 1001 and the work file 1004, a pseudo error is removed from the design rule check error, and the pseudo error discrimination processing 100 is output to the design rule check result 1006.
5.

Here, the pseudo error discrimination processing 1005 is as follows.
The flow configuration is as shown in FIG. In other words, the mask pattern data 1
A work file 1103 which is a result of a design rule check (hereinafter abbreviated as “DRC” as appropriate) is input by a graphic data input 2 unit 1104, and 110 is input.
In 5, each overlap is determined. If there is an overlap, non-output processing 1106 is performed as a pseudo error. If there is no overlap, the design rule check result 11 is regarded as a true error.
The graphic data output 1107 outputs 08.

However, with the above configuration, a DRC error (a work file 110) in which pseudo errors after DRC are mixed.
When the overlap determination between 3) and the mask pattern data is performed, it is determined that all errors including the true error have an overlap, and all the errors are pseudo errors, so that a true error can be detected. There is a problem that it disappears.

As an example of a conventional design rule check method and system, in the technique described in Japanese Patent Application Laid-Open No. 9-16646, pattern data of a basic cell is input from a graphic input unit, and a design operation is performed by a graphic operation unit. Check the rules, output to the error figure output section,
The circuit graphic is displayed on the display unit, and the designer extracts the pseudo errors by the pseudo error selection unit, and stores the extracted pseudo errors in the pseudo error storage unit. Then, the pattern data of the entire semiconductor chip is inputted from the graphic input unit, the design rule check is performed by the graphic calculation unit, and the pseudo error data stored in the pseudo error storage unit is subjected to the SUB calculation by the SUB calculation unit. The circuit graphic is displayed on the display unit by removing the pseudo error stored in the storage unit.

However, according to the above configuration, it is necessary to perform DRC once and manually detect a pseudo error from among the output errors, and there is a possibility that a human error such as erroneous detection or omission of detection may be mixed. Is very large. Further, according to the above configuration, there is a problem that the DRC process must be performed at least twice.

[0012] Further, in the configuration similar to the above-mentioned conventional example, Japanese Patent Laid-Open No.
No. 176103 also describes a design verification method. In this method, when the error discriminating unit outputs an error list at the time of the first layout data verification, the errors in the error list are converted into a true error and a pseudo error. After the classification, if a pseudo error exists, the pseudo error is stored in the pseudo error storage means, and the error location is corrected for the true error. Thereafter, at the time of the second verification of the layout data, when the error discriminating means outputs the error list, the error deleting means removes the pseudo error stored in the pseudo error storing means from the error list, and corrects the error list. Next, the errors in the calibrated error list are classified into true errors and pseudo errors,
If there is a pseudo error, the pseudo error is stored in the pseudo error storage means, and the error location is corrected for the true error.

However, according to this configuration, it is necessary to perform design data verification once and manually classify errors (true errors and pseudo errors) at least once in the error list. Therefore, human errors such as omission of detection and erroneous detection may be mixed, and the design verification man-hour (T
AT) and a decrease in design quality due to erroneous detection (misclassification). In addition, since it is necessary to manually classify a pseudo error and a true error based on an error list, there is a problem that quick error classification cannot be performed.

Further, as another example of the conventional design rule check device, in the technology described in Japanese Patent Application Laid-Open No. H06-259503, a dummy in which information of error contents and coordinate information is added to a place where a pseudo error occurs. A pattern is added in advance, and a design rule error that matches the above error information or coordinate information is identified from the design rule errors detected based on the design rule, and this design rule error is regarded as a pseudo error. It is configured with a design rule device that detects and displays a true design rule error portion by distinguishing it from a true design rule error that does not comply with the design rule.

However, according to the above configuration, there is a problem that extra man-hours are required since dummy data must be created in the design data.

Accordingly, the present invention has been made in view of the problems in the above-described conventional design rule checking method and system.
Prevention of false detection and omission of detection due to manual error detection work can be prevented, no extra man-hours are required for manual error detection and processing of design data, and true design rule errors can be reliably detected. It is an object of the present invention to provide a design rule check method and a system capable of detecting at high speed.

[0017]

According to the first aspect of the present invention,
A design rule check system, a special specification data input processing means for inputting design special specifications designated and created by the design system, a design data input processing means for inputting design data, and a design data input processing means for inputting the special specification data and the design data. Pseudo-judgment processing means for falsely affirming and negating the design rule check flag according to the relationship between the area value and the parameter value, and design reference data input processing means for inputting a design reference file storing design rules And a design rule check processing means for performing a design rule check, and a design rule check result output means for displaying and outputting a design rule check result as a true design rule check error and a pseudo error list for confirmation. I do.

According to a second aspect of the present invention, there is provided a design rule check system, comprising: a design rule check processing unit for inputting design data and design reference data in which design rules are stored; A WORK error output processing section for outputting error data including the WORK error data as WORK data, a mutual data link processing section capable of displaying the corresponding error section on the design system by a data link function between the WORK error data and the design system; A special specification creation processing unit that specifies and creates a local special specification on the system, a pseudo error selection process that inputs WORK data and special specification data, and separates a true DRC error from a pseudo error, and a design rule check result Equipped with a design rule check result output processing unit that outputs It is characterized in.

According to a third aspect of the present invention, the mutual data link processing section includes a graphic drawing processing function for drawing and displaying a graphic of the corresponding error section.

According to a fourth aspect of the present invention, there is further provided a data interlinking function with the design system.

According to a fifth aspect of the present invention, there is provided a design rule checking method, wherein a special design rule which is locally effective on a design system is created, and a special design specification and design data of a common area are created. The present invention is characterized in that a design rule check is performed, the result is artificially affirmed / negated, and a design rule check process with a design criterion storing generally valid design rules is performed.

According to a sixth aspect of the present invention, there is provided a design rule checking method, wherein a design rule check process is performed using design data and design reference data storing design rules to design error data containing a pseudo error. The data link function with the system displays the graphic of the error occurrence part, identifies the pseudo error occurrence part, creates special design specification data locally by specifying parameters on the design system, and creates a pseudo error. A distinction is made between a true error and a pseudo error based on the inside and outside of the area between the contained error data and the special specification data.

According to a seventh aspect of the present invention, the special specification data of the local special design specification part different from the general design rules on the design system is automatically designated by specifying the parameter value in the area. It is characterized by conversion and creation.

According to the present invention, area parameter information having a special design specification is locally specified and created on the design system, and the design rule check process is performed in consideration of the information. The result can be obtained.

Further, according to the present invention, since pseudo errors are not mixed in the obtained design rule check result, it is possible to eliminate the need for manual error detection work from the design rule check result.

Furthermore, according to the present invention, by eliminating the task of manually determining the type of error (true error / pseudo error) from the result of the design rule check, human error such as erroneous determination or omission of determination is prevented. Can be prevented.

Further, according to the present invention, since the configuration is not limited to a specific CAD system,
It is possible to provide a design rule check system in which a countermeasure against a pseudo error is considered on an AD system.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific example of an embodiment of a design rule check method and system according to the present invention will be described with reference to the drawings.

FIG. 1 shows the input / output relationship of the design rule check system according to the present invention. In this system,
A design standard file 102 containing design data 101 and design rule information and a design special specification 103 containing special specification information (special specification area and parameter values) created on the design system are input, and a design rule check 104 is performed. And outputs a check result 105 such as error information.

As shown in FIG. 2, the design special specification 202 and the design data 204 created by the design system 201 are
They are respectively input by the special specification data input processing unit 203 and the design data input processing unit 205, and pseudo affirmation / denial processing is performed based on the parameter values of the special specification data and the design data input in the same area. The design data in the memory after the pseudo judgment processing 206 and the design reference file 207 storing the general design rules are input by the design reference data input processing unit 208, and the pseudo judgment / The design rule check process 209 is performed on the design data not subjected to the negation process, and the design rule check result output processing unit 210 separately outputs the true DRC error 211 and the pseudo error 212 for confirmation.

Next, a first embodiment of a design rule check method and system according to the present invention will be described with reference to FIG.

In this system, a design system 301 creates design data 302 and design special specification data 303, and creates a design data 302, design special specification data 303, and a design reference file 304 storing design rules. The design rule check 305 is performed on the basis of the above, and a pseudo error list 306 for confirmation and a true DRC error 307 are output.

Here, the design rule check processing 30
FIG. 4 shows a detailed processing flow of No. 5.

Each data is input by a special specification data input processing unit 402 for inputting design special specification data 401 and a design data input processing unit 404 for inputting design data 403.

Then, the area and parameter values specified in the input special specification data are compared with the parameter values of the design data in the same area, and if they match, they are taken into the memory of the design rule check system. The pseudo determination process 405 is performed such that the DRC confirmation flag in the corresponding area on the design data is positively affirmed.

Next, the design standard data input processing unit 407 inputs a design standard file 406 containing design rules that are generally common. Pseudo judgment processing 405
A design rule check 408 is performed between the design data on the memory later and the design reference data fetched by the design reference data input processing unit 407, and if the design rule is violated, a true DRC error is determined and the DRC result output is performed. The processing unit 412 outputs a true DRC error list 413.

On the other hand, if it is determined as a result of the design rule check 408 that the data conforms to the design rule, it is confirmed whether or not the DRC confirmation flag of the design data in the memory is affirmed (409), and the DRC is confirmed. If the flag is affirmed, it is contrary to the general design rule in general, but it is judged that it conforms to the special specification recognized locally, and the result of the normal design rule check processing is pseudo The check pseudo error list 411 is output by the check pseudo error output processing unit 410 so as to be output as an error and to check that the design data corresponds to the special specification specified on the design system.

As shown in FIG. 5, the processing flow for performing the pseudo-determination processing is a special specification data input processing in which special design special specification data 501 specified and created on the design system and locally different from general design rules is input. The design data 503 is input by the design data input unit 504.

The data specification area between the input special specification data and the design data is compared (505). If the data is the same area data, the parameter value in the special specification data is compared with the design specification in the design data ( 506) If they do not match, a pseudo-negation flag process 508 is performed to pseudo-negate the DRC confirmation flag in the corresponding area on the design data fetched in the memory.

When the parameter value of the design specification matches the specification of the design data in the parameter value comparison processing unit 506, the corresponding value in the design data fetched into the memory by the pseudo validation flag processing unit 507. The DRC confirmation flag in the region is positively affirmed.

By these processes, a design rule check process in consideration of a local special design specification can be performed, and a true DRC error and a pseudo error for confirmation can be discriminated.

Next, a description will be given of a second embodiment of the design rule checking method and system according to the present invention.

In the present embodiment, as shown in FIG. 6, the design system 601 and the evaluation system 602 are configured so that they can have a data link relationship with each other.

As shown in FIG. 7, in this embodiment, design data 702 created by a design system 701 and design reference data 703 storing general design rules are input, and a design rule check process 704 is performed. ,
The DRC result including the pseudo error is output as WORK data 705. Then, by clicking a corresponding error in the WORK data 705 with a mouse, the selected figure is displayed on the screen of the design system 701. If the displayed figure data is a pseudo error, the design The special specification data 706 is created on the system 701.

The special specification data 706 created by the design system 701 and the design rule check processing 7
WORK data 705, which is error data including the pseudo error output in step 04, is input, and a true error and a pseudo error for confirmation are discriminated and output in the pseudo error selection processing unit 707 as a DRC result 708. ing.

FIG. 8 shows a detailed processing flow of the pseudo error selection processing 707.

By the special specification data input processing unit 802,
Enter the special specification data 801 and work data 8 containing a pseudo error that resulted in an error in the design rule check.
03 is input by the mixed error data input processing unit 804. A comparison process 805 is performed for the area value between the specified area in the input special design specification data and the error data area in the work data, and the work data outside the special specification data area is determined to be a true error. Then, the true DRC error list 810 is output to the DRC error result output processing unit 809.
Output with.

On the other hand, in the area data value comparison processing 805, regarding the work data determined as an error within the area value of the data specified by the special specification data,
The setting parameter comparison value processing unit 806 checks whether the parameter value matches the parameter value of the special specification. If the parameter value of the error data matches the parameter value of the special specification, the error is determined as a pseudo error, The pseudo error output processing unit 807 outputs a pseudo error 808 for confirmation.

A setting parameter value comparison processing unit 806
Therefore, when the setting parameter value in the error data is different from the parameter value of the special specification, the error data is determined as a true design rule check error, and D
It is output as a true DRC error 810 by the RC error result output processing unit 809.

According to this processing flow, based on the result of the design rule check including the pseudo error in the above embodiment,
The true DRC error and the pseudo error can be separately output.

[0051]

As described above, according to the present invention,
On all CAD systems, it is possible to prevent erroneous detection or omission of detection due to manual pseudo-error detection work, and no extra man-hours are required to manually detect pseudo-errors and process design data. It is possible to provide a design rule check method and system capable of reliably and quickly detecting a design rule error.

[Brief description of the drawings]

FIG. 1 is an input / output block diagram of a design rule check system according to the present invention.

FIG. 2 is an overall configuration diagram of a design rule check system according to the present invention.

FIG. 3 is a block diagram showing a first embodiment of a design rule check system according to the present invention.

FIG. 4 is a flowchart showing an operation of a design rule check processing unit of the design rule check system of FIG. 3;

FIG. 5 is a flowchart of a pseudo determination process of the design rule check system of FIG. 3;

FIG. 6 is a system related diagram in a second embodiment of the design rule check system according to the present invention.

7 is a data-related block diagram of a design system and a CAD system in which the design rule check system of FIG. 6 is used.

FIG. 8 is a flowchart of a pseudo error selection process of the design rule check system of FIG. 6;

FIG. 9 is an input / output block diagram of a conventional general design rule check system.

FIG. 10 is a block diagram of a conventional design rule check system.

FIG. 11 is a flowchart of a pseudo error determination process of the conventional design rule check system.

[Explanation of symbols]

Reference Signs List 101 Design data 102 Design reference file 103 Design special specification data 104 Design rule check processing 105 Design rule check result 201 Design system 202 Design special specification data 203 Special specification data input processing unit 204 Design data 205 Design data input processing unit 206 Pseudo judgment Processing unit 207 Design standard file 208 Design standard data input processing unit 209 Design rule check processing unit 210 DRC result output processing unit 211 True DRC error 212 Pseudo error for confirmation 301 Design system 302 Design data 303 Design special specification data 304 Design standard File 305 Design rule check processing unit 306 Pseudo error list for confirmation 307 Design rule check result 401 Special design specification data 402 Special specification Data input processing unit 403 Design data 404 Design data input processing unit 405 Pseudo judgment processing unit 406 Design reference file 407 Design reference data input processing unit 408 Design rule check processing unit 409 Presence / absence processing unit for pseudo verification processing 410 Confirmation Pseudo error output processing section 411 Check pseudo error list 412 Design rule check result output processing section 413 True design rule check error list 501 Design special specification data 502 Special specification data input processing section 503 Design data 504 Design data input processing section 505 Design data and special specification data designation area comparison processing unit 506 Parameter value comparison processing unit 507 Pseudo affirmation flag processing unit 508 Pseudo negation flag processing unit 601 Design system 602 Evaluation system 701 Design system System 702 Design data 703 Design reference data 704 Design rule check processing section 705 WORK error data 706 Special specification data 707 Pseudo error selection (true error detection) processing 708 Design rule check result output group 801 Special specification data 802 Special specification data input processing Unit 803 pseudo error mixed work data (DRC result list) 804 mixed error data input processing unit 805 area data value comparison processing unit 806 setting parameter value comparison processing unit 807 pseudo error output processing unit 808 pseudo error 809 DRC error result output processing unit 810 (True) design rule check error 901 design data 902 design standard file 903 design rule check 904 design rule check result 1001 mask pattern data 1002 Design standard file 1003 Design rule check processing 1004 Work file 1005 Pseudo error discrimination processing 1006 Design rule check result 1101 Mask pattern data 1102 Graphic data input 1 part 1103 Work file 1104 Graphic data input 2 part 1105 Overlap judgment 1106 No pseudo error output 1107 Graphic data output 1108 Design rule check result

Claims (7)

[Claims] 1. A special specification data input processing means for inputting a design special specification designated and created by a design system, a design data input processing means for inputting design data, an area value between the input special specification data and the design data, Pseudo-judgment processing means for falsely affirming or negating the design rule check flag according to the relationship with the parameter value; design-criteria data input processing means for inputting a design-criteria file storing design rules; A design rule check processing means for executing a check; and a design rule check result output means for displaying and outputting a design rule check result as a true design rule check error and a pseudo error list for confirmation. Check system. 2. A design rule check processing section for inputting design data and design reference data in which design rules are stored, and performing a design rule check, and a WORK error output process for outputting error data including a pseudo error as WORK data. Section, a mutual data link processing section capable of graphically displaying the corresponding error section on the design system by a data link function between the WORK error data and the design system, and a special specification for designating and creating a local special specification on the design system Creation processing unit, WORK data and special specification data are input, and true DRC
A design rule check system comprising: a pseudo error selection process for separating an error from a pseudo error; and a design rule check result output processing unit for outputting a design rule check result. 3. The design rule check system according to claim 1, wherein the mutual data link processing unit includes a graphic drawing processing function for drawing and displaying a graphic of the corresponding error part. 4. The design rule check system according to claim 1, further comprising a data mutual link function with the design system. 5. A special design rule that is locally effective on a design system is created, a design rule check is performed between a special design specification and design data in a common area, and the result is pseudo-affirmed. /
A design rule check method comprising performing a negativity process and a design rule check process with a design standard storing generally valid design rules. 6. A design rule check process is performed using design data and design reference data storing design rules, and error data containing a pseudo error is displayed by a data link function with a design system in a graphic display of an error generating portion. Identify the pseudo error generating part, create special design specification data locally by specifying parameters on the design system, and inside and outside the area between error data containing pseudo error and special specification data, A design rule check method characterized by determining a true error and a pseudo error. 7. The method according to claim 1, further comprising: specifying a special specification data of a local special design specification part different from a general design rule on the design system by specifying a parameter value in the area.
7. The design rule checking method according to claim 5, wherein the conversion is automatically created.