US6907587B2 — System and method for correcting connectivity err…

Claim 1

Independent Claim 65 words

An automated method for correcting connectivity errors in a mask layout file, comprising: comparing a first connection in a mask layout file to a second connection in a schematic netlist; identifying a connectivity error in the mask layout file if the first connection does not match the second connection; and automatically correcting the connectivity error in the mask layout file by modifying the first connection.

Claim 2

Dependent Claim 65 words

An automated method for correcting connectivity errors in a mask layout file, comprising: comparing a first connection in a mask layout file to a second connection in a schematic netlist; identifying a connectivity error in the mask layout file if the first connection does not match the second connection; and automatically correcting the connectivity error in the mask layout file by modifying the first connection.

Claim 3

Dependent Claim 31 words

The method of claim 1 , further comprising: determining if the modified first connection creates a design rule error; and eliminating the design rule error by further modifying the first connection.

Claim 4

Dependent Claim 21 words

The method of claim 1 , further comprising generating a clean mask layout file that does not include the connectivity error.

Claim 5

Dependent Claim 17 words

The method of claim 1 , further comprising generating an output file that includes the connectivity error.

Claim 6

Dependent Claim 57 words

The method of claim 1 , wherein correcting the connectivity error comprises: creating a break point in the first connection; locating a layout node in the mask layout file that corresponds to a schematic node associated with the second connection in the schematic netlist; and routing a third connection from the break point to the layout node.

Claim 7

Dependent Claim 24 words

The method of claim 5 , further comprising removing a portion of the first connection located between the break point and the layout node.

Claim 8

Dependent Claim 30 words

The method of claim 5 , further comprising routing the third connection from the break point to the layout node without introducing design rule errors in the mask layout file.

Claim 9

Dependent Claim 17 words

The method of claim 1 , wherein the mask layout file and the schematic netlist are hierarchical.

Claim 10

Dependent Claim 28 words

The method of claim 1 , further comprising the schematic netlist including a list of nodes and logical connections associated with a schematic representation of an integrated circuit.

Claim 11

Dependent Claim 28 words

The method of claim 1 , further comprising the mask layout file including first polygons that represent the first connection and second polygons that represent the second connection.

Claim 12

Dependent Claim 94 words

A computer system for correcting connectivity errors in a mask file, comprising: a processing resource; a computer readable memory; and processing instructions encoded in the computer readable memory, the processing instructions, when executed by the processing resource, operable to perform operations comprising: comparing a first connection in a mask layout file to a second connection in a schematic netlist; identifying a connectivity error in the mask layout file if the first connection does not match the second connection; and automatically correcting the connectivity error in the mask layout file by modifying the first connection.

Claim 13

Dependent Claim 94 words

A computer system for correcting connectivity errors in a mask file, comprising: a processing resource; a computer readable memory; and processing instructions encoded in the computer readable memory, the processing instructions, when executed by the processing resource, operable to perform operations comprising: comparing a first connection in a mask layout file to a second connection in a schematic netlist; identifying a connectivity error in the mask layout file if the first connection does not match the second connection; and automatically correcting the connectivity error in the mask layout file by modifying the first connection.

Claim 14

Dependent Claim 60 words

The system of claim 11 , further comprising the instructions operable to perform operations including: creating a break point in the first connection; locating a layout node in the mask layout file that corresponds to a schematic node associated with the second connection in the schematic netlist; and route a third connection from the break point to the layout node.

Claim 15

Dependent Claim 53 words

The system of claim 12 , further comprising the instructions operable to perform operations including: routing a third connection from the break point to the layout node; determining if the third connection creates a design rule error in the mask layout file; and eliminating the design rule error by modifying the third connection.

Claim 16

Dependent Claim 31 words

The system of claim 12 , further comprising the instructions operable to perform operations including removing a portion of the first connection located between the break point and the layout node.

Claim 17

Dependent Claim 26 words

The system of claim 11 , wherein the processing resource is operable to generate a clean mask layout file that does not include the connectivity error.

Claim 18

Dependent Claim 17 words

The system of claim 11 , wherein the mask layout file and the schematic netlist are hierarchical.

Claim 19

Dependent Claim 81 words

Software for correcting connectivity errors in a mask layout file, the software being embodied in computer-readable media and when executed operable to: compare a first connection in a mask layout file to a second connection in a schematic netlist; identify a connectivity error in the mask layout file if the first connection does not match the second connection; and in response to identifying the connectivity error, automatically correct the connectivity error in the mask layout file by modifying the first connection.

Claim 20

Dependent Claim 81 words

Software for correcting connectivity errors in a mask layout file, the software being embodied in computer-readable media and when executed operable to: compare a first connection in a mask layout file to a second connection in a schematic netlist; identify a connectivity error in the mask layout file if the first connection does not match the second connection; and in response to identifying the connectivity error, automatically correct the connectivity error in the mask layout file by modifying the first connection.

Claim 21

Dependent Claim 37 words

The software of claim 17 , further operable to: determine if the modified first connection creates a design rule error in the mask layout file; and eliminate the design rule error by further modifying the first connection.

Claim 22

Dependent Claim 63 words

The software of claim 17 , further comprising correcting the connectivity error in the mask layout file by: creating a break point in the first connection; locating a layout node in the mask layout file that corresponds to a schematic node associated with the second connection in the schematic netlist; and routing a third connection from the break point to the layout node.

Claim 23

Dependent Claim 34 words

The software of claim 19 , further comprising correcting the connectivity error in the mask layout file by removing a portion of the first connection located between the break point and the layout node.

Claim 24

Dependent Claim 35 words

The software of claim 19 , further comprising correcting the connectivity error by routing the third connection from the break point to the layout node without introducing design rule errors in the mask layout file.

Claim 25

Dependent Claim 17 words

The software of claim 17 , wherein the mask layout file and the schematic netlist are hierarchical.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2008-06-13	2008-12-13	2009-06-14	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2012-06-13	2012-12-13	2013-06-14	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2016-06-13	2016-12-13	2017-06-14	$7700.00	Window Closed / Lapsed

System and method for correcting connectivity errors in a mask layout file

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