WO2005114498A1 - Lsiレイアウト装置及びその方法並びにプログラム - Google Patents
Lsiレイアウト装置及びその方法並びにプログラム Download PDFInfo
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- WO2005114498A1 WO2005114498A1 PCT/JP2005/009359 JP2005009359W WO2005114498A1 WO 2005114498 A1 WO2005114498 A1 WO 2005114498A1 JP 2005009359 W JP2005009359 W JP 2005009359W WO 2005114498 A1 WO2005114498 A1 WO 2005114498A1
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/39—Circuit design at the physical level
Definitions
- the present invention relates to an LSI layout device used when designing an LSI (large-scale integrated circuit), a layout method thereof, and a layout program.
- a plurality of elements constituting a circuit function are formed on a substrate such as silicon using the above-mentioned mask.
- a layout pattern corresponding to a logic-synthesized circuit is prepared in advance as a layout database as circuit layout information. Also, there is described an LSI layout apparatus that creates the above-mentioned layout database and designs a layout pattern using the layout database.
- Patent Document 1 Japanese Patent Application Laid-Open No. 09-237839
- Patent Document 2 Japanese Patent Application Laid-Open No. 11-2977836
- Patent Document 3 JP-A-2000-314954 Disclosure of the invention
- the above-described layout database includes a set of layers based on a predetermined functional device, that is, a circuit layout pattern in a circuit design.
- the pattern data of the layer in the layer set A is read into the editing buffer, and then the pattern data of the layer in the layer set B is read, and the data is read into the editing buffer. Therefore, the pattern data of the layer set B is overwritten on the pattern data of the layer set A, and the pattern data of the two layout sets are mixed.
- the pattern data of the layer set B is included in the layer set A.
- the layout pattern is displayed on the display device of the mixed layout pattern device in the editing buffer.
- the editing buffer is a storage unit for temporarily storing pattern data of each layer of the layout database to be edited when editing the layout pattern on the display screen.
- the conventional LSI layout apparatus when the layers of the layout pattern have the same layer number, the pattern data of each layer of the layer set A and the layer set B is mixed in the editing buffer. As a result, it becomes impossible to distinguish which layer set the layout pattern after mixing belongs in terms of data. Therefore, the conventional LSI layout apparatus has an undo function for canceling the work. On the other hand, the separation for restoring the layout database in the included editing buffer is performed. Can't do it.
- the present invention has been made in view of such circumstances, and includes a plurality of circuit design layers in a pattern data synthesized by an include process between a plurality of circuit designs.
- An object of the present invention is to provide an LSI layout device, a layout method thereof, and a layout program capable of identifying pattern data.
- an LSI layout apparatus of the present invention uses a circuit layout pattern belonging to a different circuit design and displays pattern data of each layer constituting the circuit layout pattern when designing an LSI layout pattern. And edit
- An LSI layout apparatus wherein pattern data of each layer constituting the circuit layout pattern is displayed on a display screen with a layout database (for example, layout database 11 in one embodiment) stored for each circuit design.
- An editing buffer for example, an editing buffer 25 in one embodiment for storing the circuit layout pattern to be read, and a circuit layout pattern provided for each circuit design.
- a design table storing design information including address information of the editing buffer (for example, the design table 24 in one embodiment), and a circuit layout pattern corresponding to the display screen and displayed on the display screen.
- Display information With reference to the display table (e.g., the display table 22 in one embodiment) in which is stored and the display information, a layer of a predetermined circuit layout pattern is read out from each editing buffer using the design information, and A display unit (for example, a display unit 4 in one embodiment) for displaying pattern data of each layer on the display screen, and when each layer of the circuit layout pattern is stored in the editing buffer, Identification information indicating which circuit design is included is given for each layer. Further, the LSI layout method of the present invention uses a circuit layout pattern belonging to a different circuit design to display and edit pattern data of each layer constituting the circuit layout pattern when designing the LSI layout pattern.
- a buffer process for example, steps S7 and S8 in one embodiment
- a buffer process for example, steps S7 and S8 in one embodiment
- the circuit layout pattern is stored.
- a design table storing step of storing design information including address information of the writing buffer in a design table (for example, steps S3 to S6 in one embodiment), and displaying the design screen on the display screen corresponding to the display screen.
- Each layer of the circuit layout pattern is stored in the When the identification information indicating whether included in the circuit design ⁇ deviation, applied to the respective layer units.
- the computer-executable LSI layout program of the present invention uses a circuit layout pattern belonging to a different circuit design, and when designing an LSI layout pattern, the pattern of each layer constituting the circuit layout pattern.
- the storage process stores pattern data of layers constituting the circuit layout pattern in a layout database corresponding to each circuit design. (E.g., step SO in one embodiment) and a knocker process for storing the circuit layout pattern read from the layout database in an editing buffer when displayed on a display screen (e.g., step S7 in one embodiment). , S8) Provided for each road design.
- a design table storing process of storing design information including address information of the editing buffer in which a layout pattern is stored in a design table for example, steps S3 to S6 in one embodiment
- a display table storage process for storing display information indicating a circuit layout pattern to be displayed on the display screen in a display table for example, steps S9 to S14 in one embodiment
- a display process of reading a layer of a predetermined circuit layout pattern from each editing buffer based on the design information and displaying the pattern data of each layer on the display screen for example, steps S17 and S18 in one embodiment
- Having the editing buffer When storing each layer of the road layout pattern, the identification information indicating whether included in any of the circuit design, to impart to the respective layer units.
- the LSI layout device, the method, and the program of the present invention can be configured such that when any circuit layout pattern is included in another circuit layout pattern, the identification information for each circuit design is changed for each layer. Since each layer of the arbitrary circuit layout pattern has the same layer number, each layer is written to a different editing buffer. Even if it is displayed, since substantially different circuit layout patterns are not synthesized by one editing buffer, the pattern data of each layer can be easily recognized for each circuit design.
- the LSI layout apparatus, method and program thereof when returning the result of editing to the layout database, refer to the identification information given to each layer and refer to each layer corresponding to each circuit design.
- the pattern buffer data can also be read out from the editing buffer, and the pattern data for each layer can be written to the corresponding layout database.As in the past, the pattern data of multiple circuit designs are combined and returned to the initial state. It is possible to prevent a destructive editing operation that cannot be performed on the layout database.
- the LSI layout device of the present invention is provided in correspondence with each of the design tables, and includes a layer number indicating each of the layers and an address of an editing buffer.
- Buffer header information storing the buffer information (for example, the editing buffer header 21 in one embodiment), and the circuit layout patterns provided on the display table, including the layer number, on the display screen.
- a display header table (e.g., the display header 23 in one embodiment) in which display information necessary for display is stored, and when displaying each layer on the display screen by using the display information of the display table.
- the pattern table data of the layer corresponding to the layer number stored in the display header table is also read out via the buffer header table.
- the LSI layout method of the present invention is provided in correspondence with each of the design tables, and stores a layer buffer information including a layer number indicating each layer and an address of an editing buffer in a buffer header table.
- a table storing process (for example, steps S5 and S6 in one embodiment) and a process for displaying each circuit layout pattern, which is provided corresponding to the display table and includes the layer number, on a display screen.
- a display header table storing step of storing display information in a display header table (for example, steps S13 and S14 in one embodiment), and displaying each layer on a display screen based on the display information of the display table. , Stored in the display header table The pattern data of the layer corresponding to the layer number is read from the editing table via the buffer header table.
- the LSI layout apparatus and method of the present invention can independently manage the layer editing buffer for each circuit layout pattern for each layout database and display screen.
- the LSI layout device of the present invention has a plurality of the display tables, and a display header table is provided for each of the display tables.
- the LSI layout device of the present invention can manage each display screen independently when displaying a plurality of display screens (windows) on the display of the device.
- a layer to be displayed on the display screen regardless of the circuit layout pattern to which each layer to be displayed on each display screen belongs.
- the identification information is represented by a predetermined character or numeral added to a layer number of each layer.
- the LSI layout apparatus of the present invention can easily add identification information for identifying a preset circuit design by an OR operation or the like to the original layer number, and Can be easily performed, and the discrimination processing of each layer can be performed by a simple means in the editing buffer.
- the pattern data of each layer in each circuit pattern read out is stored in the editing buffer, an identification number indicating whether or not each layer unit is included in the shifted circuit design.
- the pattern data of each layer corresponding to each circuit design is also read out by the editing buffer with reference to the identification information given to each layer. Then, it becomes possible to write the pattern data of each layer into the layout database of the corresponding circuit design.
- FIG. 1 is a block diagram showing a configuration example of an LSI layout device according to an embodiment of the present invention.
- FIG. 2 is a conceptual diagram showing a relationship between a design table, an editing buffer header, and an editing buffer in FIG.
- FIG. 3 is a diagram showing a relationship between the original layer number of each layer of the circuit design A and the circuit design B and a new layer number to which an identifier is added.
- FIG. 4 is a conceptual diagram showing a relationship between a display table and a display header.
- FIG. 5 is a conceptual diagram illustrating display processing of each layer in a circuit layout pattern of a circuit design A and a circuit design B.
- Figure 6 shows the circuit layout patterns of circuit design A and circuit design B.
- FIG. 9 is a sequence diagram illustrating a layer display process.
- FIG. 1 is a block diagram showing a configuration example of the embodiment.
- the LSI layout device includes a main storage unit 1 and an LSI layout unit 6.
- the main storage unit 1 is provided with a plurality of layout databases 11 corresponding to each circuit design and storing circuit layout information including a circuit layout pattern belonging to each circuit design.
- the circuit design means, for example, circuit design information that can be manufactured with the same processing dimensions in the manufacturing process, that is, has the same mask design rules (for example, each layout hierarchy (hard layer or software macro) layer (layer) )).
- the circuit design information is separately designed so as to have a predetermined function in a library of a memory circuit or a logic circuit.
- the LSI layout unit 6 has an auxiliary storage unit 2, a control unit 3, and a display unit 4.
- the auxiliary storage unit 2 has storage areas such as an editing buffer header 21, a display header 23, a display table 22, a design table 24, and an editing buffer 25. Each of these storage areas stores management data for managing each circuit layout pattern. This management data uses the circuit layout patterns belonging to a plurality of different circuit designs by the user, and when these are combined to perform the editing operation of the circuit layout pattern of the LSI, the control unit 3 executes the respective circuit layout patterns based on the editing operation. Used when performing pattern editing processing and display processing on the display unit 5.
- the editing buffer 25 stores pattern data of each layer provided for each layer, corresponding to each circuit layout pattern.
- the pattern data of each layer in the circuit layout pattern shown in the design table 24 and the pattern data of the layer in each editing buffer 25 are associated by the editing buffer header 21 as shown in FIG. RU
- the design table 24 includes the design name, initial creator name, last modified name, initial created date, and last modified date of this circuit design, including the above-mentioned editing buffer header address. , And has design information such as the maximum number of layers and the entire memory use area.
- the editing buffer header address described in the design table 24 indicates the address of the editing buffer header 21 corresponding to each layer in the circuit layout pattern of the circuit design described in the design table 24.
- the editing buffer header 21 stores layer buffer information corresponding to each layer of the circuit layout pattern read into the editing buffer 25 on a one-to-one basis in an entry unit.
- the circuit layout pattern is, for example, “poly”, “n-well”, “p-well”, “contact”, “di! F p + J”, “diff n +”, “via-1” , "Via-2", “meta2”, and “meta3”, the above entry is composed of the pattern data of each layer (in the manufacturing process).
- One-to-one correspondence with mask layers (corresponding to each mask used for photolithography), and the layer number is also linked to the above-mentioned layer name.
- this entry 1 It has layer buffer information such as a design number indicating whether it belongs to the design, a layer name, a layer number, and a leading address of an editing buffer 25 in which pattern data of a layer corresponding to this entry is stored. .
- the control unit 3 writes the circuit layout pattern read from the main storage unit 1 into the editing buffer 25 corresponding to each layer in each circuit layout pattern, when the design table 24 and the editing buffer header 21 are written.
- control unit 3 When writing the layer number in each entry field of the editing buffer header 21, the control unit 3 uses a predetermined numerical value or character identifier as identification information as to which circuit design this layer belongs to. Assigned to the layer number.
- the layout device conventionally assigns each layer number in the layout pattern, and for the same layer type, In many cases, the same number is used.
- the circuit design A and the B When editing, the circuit layout pattern of the circuit design A is read first, and thereafter, the circuit layout pattern of the circuit design B is included in the circuit layout pattern.
- the pattern of the same layer number between the layer number “101” in the circuit layout pattern of the circuit design A and the layer number “101” in the circuit layout pattern of the circuit design B is displayed. Data is mixed.
- the control unit 3 when writing each layer number in the entry field of the editing buffer header 21, uses a predetermined numerical value or a character as an identifier for this layer number as described above. (OR operation) to generate a new layer identification number, and write this layer identification number into the entry field.
- a predetermined numerical value or a character to be ORed is an identifier for identifying the circuit design.
- the predetermined numerical value as the identifier is used in the layout database 11 in the main memory 1. Therefore, when an OR operation is performed using a larger number of digits and a numerical value than the original layer number, a value that does not change each digit of the original layer number facilitates management.
- a predetermined character as an identifier may be added after the least significant digit of the layer number (“101A”) or added to the most significant digit of the layer number ( ⁇ ) by OR operation. Good.
- control unit 3 writes the correspondence between the design name or design number of the circuit design and the identifier added to the circuit design in the correspondence table 5 provided in the auxiliary storage unit 2.
- the display unit 4 generates a display screen (window) for each display table 22, and in each of the display screens, refers to the display header 23 shown in the display table 22, and The pattern data stored in one or more editing buffers 25 described in the header 23 is displayed.
- the display table 22 is created for each display screen on the display unit 4, and as shown in FIG. 4, is the name of the display screen (for example, the display screen 41 in FIG. 5) including the display header address described above. It has display information such as display name, initial creator of this display screen, initial creation date, last change date, maximum number of layers, and total memory usage area.
- each layer of the circuit layout pattern shown in the display table 22 and each layer of the display unit in the display unit 4 are associated one-to-one by the display header 23 as shown in FIG. /
- the display header address described in the display table 22 indicates the address of the display header 23 that manages the layer displayed in the corresponding display screen unit.
- an entry indicating display information is stored in one-to-one correspondence with each layer displayed on the display screen to be displayed.
- this entry 1 has, in each entry field, a layer number indicating which of the above-mentioned display header addresses is the only layer, a display color indicating a color when displaying this layer, and a layout.
- Indicates the rotation angle of It has information such as the rotation of the display!
- FIG. 5 is a conceptual diagram illustrating the relationship between the editing buffer header 21 and the display header 23 for each display screen when two different display screens are displayed on the display unit 4.
- FIG. 6 is a sequence diagram showing a flow of screen processing of the LSI layout apparatus.
- circuit layout patterns of the circuit designs A and B are read from the layout database 11 of the different devices in the main storage unit 1, and the circuit designs A and B are respectively displayed on the two display screens displayed on the display unit 4.
- the case where the layers are combined and displayed for each display screen will be described as an operation example.
- Circuit design A is a memory device
- circuit design B is a logic device.
- a circuit design required for a desired LSI layout design is externally input to the main storage unit 1 and stored in advance (step SO).
- the user inputs a read command for performing a process of reading a circuit layout pattern in order to make the wiring of the circuit design A correspond to the wiring of the circuit design B, and to perform a new device design by combining the two.
- control unit 3 reads out the circuit design A to be edited and the circuit design B for performing the include process on the circuit design A from the respective layout databases 11 in the main storage unit 1 (steps SI, S2).
- control unit 3 sends the design name, initial creator name, last modified name, initial created date, last modified date, and maximum layer layer of each of the circuit designs A and B from the layout database 11 by the above readout command.
- the design information including the number and the entire memory use area is read, and the design table 24-1 of the design circuit A and the design table 242 of the design circuit B are generated in the auxiliary storage unit 2 (steps S3 and S4).
- control unit 3 stores, in the auxiliary storage unit 2, an editing buffer 25-1, which stores the circuit layout pattern of the circuit design A in correspondence with the circuit design A.
- Editing buffer header 21-1 is generated (step S5), and similarly, circuit layout pattern of circuit design A is stored in correspondence with circuit design B.
- An editing buffer header 21-2 corresponding to the buffer 25-2 is generated (step S6).
- control unit 3 writes the generated editing buffer header addresses of the editing buffer headers 21-1 and 21-2 to the design tables 24-1 and 242, respectively.
- the editing buffer header 21-1 stores the layer buffer information of the circuit design A in an entry for each area corresponding to each layer of the editing buffer 25-1, and stores the circuit layout pattern of the circuit design A. Are associated with the area of the editing buffer 25-1 in which the pattern data of this layer is stored.
- the layer buffer information of the circuit design B is stored in the entry for each area corresponding to each layer of the editing buffer 25-2, and the circuit layout pattern of the circuit design B is stored. Are associated with the area of the editing buffer 25-2 in which the pattern data of this layer is stored.
- control section 3 assigns a predetermined numerical value as an identifier to each layer number.
- control unit 3 when editing each layer in the circuit layout pattern in the layout database 11, the control unit 3 adds a numerical value as an identifier to an inherent layer number at the time of generating the editing buffer header 21. , And are newly managed as layer identification numbers.
- this layer identification number has no original meaning as a layer number, and the LSI layout apparatus internally has a meaning as a management number for managing pattern data of a layer.
- a layer number inherent to the circuit design in the layout database 11 is set within a range of 1000 digits, and a numerical value as an identifier to be identified is set within a range of 1000 digits or more.
- the control unit 3 when generating the editing buffer header 21-2 corresponding to the circuit design B, applies the circuit number to the layer number originally included in the circuit layout pattern of the circuit design B as shown in FIG. As an identifier indicating the design B, a logical OR operation of 60000 is performed and converted into a layer identification number starting from 60101.
- control unit 3 writes the correspondence between the circuit design A and the identifier 50000 and the correspondence between the circuit design B and the identifier 60000 in the correspondence table 5.
- the LSI layout apparatus when the LSI layout apparatus performs editing work using a plurality of different circuit designs, it does not manage the original layer number but also identifies another layer that can identify the circuit design. Convert it to a number and store it in a different editing buffer for management.
- control unit 3 reads the pattern data of each layer in the circuit layout pattern of the circuit design A from the layout database 11 of the circuit design A in the main storage unit 11 without reading it, — Write the data of the read layer to the predetermined area of 1 (step S7).
- control unit 3 reads the data of each layer of the circuit layout pattern of the circuit design B from the layout database 11 of the circuit design B in the main storage unit 11 and edits the data.
- the data of the read layer is written in a predetermined area of the editing buffer 25-2 (step S8).
- the user inputs a display command for displaying the display screen 41 and the display screen 42 on the display unit 4 to the LSI layout device (steps S9 and S10).
- control unit 3 uses the display command to enter the display screen name, the initial creator name, the last modified person name, the initial created date, the last modified date, and the maximum number of layer layers, which are input by the user. Based on the entire memory usage area, etc., the display table 22-1 of the screen 1 and the display table 22-2 of the screen 2 are generated in the auxiliary storage unit 2 (steps S11 and S12). .
- control unit 3 generates, in the auxiliary storage unit 2, a display header 23-1 for storing information of a layer to be displayed on the display screen 41, and similarly, a layer to be displayed on the display screen 4-2. Generates a display header 23-2 that stores the information of
- control unit 3 writes the generated display header addresses of the display headers 23-1 and 23-2 to the display tapes 22-1 and 22-2, respectively.
- the user selects a layer to be displayed on the display screens 41 and 42 from the layer list in the circuit layouts of the circuit designs A and B displayed on the display unit 4.
- control unit 3 writes the display information of the layers respectively displayed on the display screen 41 and the display screen 42 input by the user into the area of each entry in the display headers 23-1 and 23-2, respectively. .
- circuit layout pattern of the circuit design A has layers A1 to A7
- circuit layout pattern of the circuit design B has layers B1 to B7.
- the layers A2, A3, A4, A5, A6 and the circuit design B in the circuit design A are edited.
- Layers B2, B7 in the circuit design A are displayed on the display screen 41, while layers Al, A7, A6, A3 in the circuit design A and layers B1, B3, B6 in the circuit design B are displayed on the display screen 42.
- the selection screen on display 4 V is displayed. Then, a layer selection process in each circuit layout pattern is performed.
- control unit 3 creates entries corresponding to the layers A2, A3, A4, A5, A6, B2, and B7 in the display header 23-1, as shown in FIG.
- the display information of the layer is written in one entry of the field (step S13).
- control unit 3 creates entries corresponding to the layers Al, A7, A6, A3, Bl, B3, and B6 in the display header 23-2, and displays the layer display information in each entry field. Is written (step S14).
- the display color, display pattern, display order, display enable, display coordinates, and display rotation in the display information are set by user input.
- control unit 3 refers to the display table 22-1, and uses each layer identification number described in each entry of the corresponding display header 23-1 to edit the buffer header 21-1. , And 21-2, read out the image data, which is the layout pattern of each layer, from the editing buffers 25-1, 25-2.
- control unit 3 writes the image data of each layer read from the editing buffers 25-1, 25-2 in the display buffer area corresponding to the display screen 41 of the display unit 4 (step S15). ).
- control unit 3 refers to the display table 22-2, and based on the corresponding display header 23-2, via the editing buffer headers 21-1 and 21-2, edits the editing buffer.
- the image data of each layer read from 25-1 and 25-2 is written to the area of the display buffer corresponding to the display screen 41 of the display unit 4 (step S16).
- the control unit 3 displays the image data of the screen 1 and the screen 2 written in the respective display buffers on the display unit 4 (steps S17, S18).
- the design circuit A to be edited As described above, there is no distinction between the design circuit A to be edited and the circuit design B included in the design circuit A as pattern data in each and the same layer.
- the circuit design A and the circuit design can prevent the layers from being mixed and mixed because the editing buffer to be stored is different even for the same layer in the layout pattern. It can be clearly determined to which of B the circuit layout pattern belongs. Then, when a command to end editing is input by the user, the control unit 3 ends editing of each layer of the circuit designs A and B, and returns the editing result to the layout database 11.
- the control unit 3 reads the layer identification number described in the editing buffer 23-1, refers to the correspondence table 5, and determines the editing buffer 25-1 based on the relationship between the circuit design and the identifier. It is determined that the layer corresponds to the circuit design A, and the layer number identifier is selectively removed. Based on the obtained layer number, each layer of the editing buffer 25-1 is stored. Overwrites the area corresponding to each layer in the layout database 11 of the circuit design A.
- control unit 3 reads the layer identification number described in the editing buffer 23-2, refers to the correspondence table 5, and determines the editing buffer from the relationship between the circuit design and the identifier. It is determined that the layer stored in 25-2 corresponds to the circuit design B, the layer identification number and other identifiers are selectively removed, and the editing buffer 25 is determined based on the obtained layer number. — Overwrite each layer of 2 with the area corresponding to each layer of layout database 11 of circuit design B.
- a program for realizing the function of the LSI layout unit in FIG. 1 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read by a computer system and executed. By doing so, LSI layout processing may be performed.
- the “computer system” includes an OS and hardware such as peripheral devices.
- the term “computer system” also includes a WWW system with a homepage providing environment (or display environment).
- the “computer-readable recording medium” refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, a CD-ROM, and a storage device such as a hard disk built in a computer system.
- a “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted through a communication line such as a network such as the Internet or a telephone line. ), The program is held for a certain period of time, and the program is also included.
- RAM volatile memory
- the above-mentioned program is transmitted from a computer system in which the program is stored in a storage device or the like to another computer via a transmission medium or by a transmission wave in the transmission medium. It may be transmitted to the system.
- the “transmission medium” for transmitting a program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.
- the program may be for realizing a part of the above-described functions.
- a program that can realize the functions described above in combination with a program already recorded in a computer system that is, a so-called differential file (differential program) may be used.
- the present invention when pattern data of each layer in each circuit pattern read out from the circuit pattern is stored in an editing buffer, an identification number indicating which circuit design is included in each layer unit is added. Therefore, when returning the result of editing to the layout database, the pattern data of each layer corresponding to each circuit design is read out from the editing buffer with reference to the identification information given to each layer, and the It becomes possible to write the pattern data into the layout database of the corresponding circuit design.
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Abstract
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004153148A JP2005338916A (ja) | 2004-05-24 | 2004-05-24 | Lsiレイアウト装置及びその方法並びにプログラム |
| JP2004-153148 | 2004-05-24 |
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| Publication Number | Publication Date |
|---|---|
| WO2005114498A1 true WO2005114498A1 (ja) | 2005-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/009359 Ceased WO2005114498A1 (ja) | 2004-05-24 | 2005-05-23 | Lsiレイアウト装置及びその方法並びにプログラム |
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| JP (1) | JP2005338916A (ja) |
| WO (1) | WO2005114498A1 (ja) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09101982A (ja) * | 1995-10-05 | 1997-04-15 | New Japan Radio Co Ltd | 半導体集積回路のcadシステム |
-
2004
- 2004-05-24 JP JP2004153148A patent/JP2005338916A/ja not_active Withdrawn
-
2005
- 2005-05-23 WO PCT/JP2005/009359 patent/WO2005114498A1/ja not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09101982A (ja) * | 1995-10-05 | 1997-04-15 | New Japan Radio Co Ltd | 半導体集積回路のcadシステム |
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| JP2005338916A (ja) | 2005-12-08 |
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