WIRING LENGTH MEASUREMENT APPARATUS AND RECORDING MEDIA

• US 20160267213A1
• Filed: 06/06/2014
• Published: 09/15/2016
• Est. Priority Date: 07/23/2013
• Status: Active Grant

• Current Assignee: Liquid Design Systems Inc.
• Original Assignee: Liquid Design Systems Inc.
• Inventors: Maeda, Shinichi, Iwase, Katsuhiko
• Granted Patent: US 9,715,568 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 30/398 Design verification or optimisation, e.g. using design rule check [DRC], layout versus schematics [LVS] or finite element methods [FEM] optical proximity correction [OPC] design processes G03F1/36
• CPC Class Codes: H01L 27/0203 Particular design considerations for integrated circuits
• CPC Class Codes: H01L 27/0207 Geometrical layout of the components, e.g. computer aided design; custom LSI, semi-custom LSI, standard cell technique

Abstract

The wiring length measurement apparatus includes a distance calculation unit, by using a plurality of coordinates of bending points and a wiring width of CAD data of a high-density wiring including a meander wiring, seeking each endpoint that exists on an edge in a wiring width direction and is a flexion point of each inner circuit side, and calculating distances between each adjacent endpoint and a measurement unit measuring a wiring length of the high-density wiring by calculating a sum of the distances between each endpoint calculated by the distance calculation unit.

Claims

1. A wiring length measurement apparatus comprising:

a distance calculation unit, by using a plurality of coordinates of bending points and a wiring width of CAD data of a high-density wiring including a meander wiring, seeking each endpoint that exists on an edge in a wiring width direction and is a flexion point of each inner circuit side, and calculating distances between each adjacent endpoint; and

a measurement unit measuring a wiring length of the high-density wiring by calculating a sum of the distances between each endpoint calculated by the distance calculation unit.

2. The wiring length measurement apparatus according to claim 1,

wherein the distance calculation unit provides a plurality of endpoints in locations in consideration of a wiring width in relation to each bending point, and calculates a shortest distance between the endpoints of adjacent bending points.

3. The wiring length measurement apparatus according to claim 1, further comprising:

a judgment unit judging whether an error of the sum of the distances between the a plurality of bending points of the meander wiring and a signal propagation distance of the meander wiring is greater than a threshold or not by using a semiconductor accumulation circuit'"'"'s signal frequency number, a wiring width, and a number of bending points,

wherein the distance calculation unit calculating a distance between the endpoints when the judgment unit judges the error as being equal to or greater than the threshold.

4. The wiring length measurement apparatus according to claim 3,

wherein the distance calculation unit calculating each distance between the a plurality of the bending points when the judgment unit judges the error as not being equal to or greater than the threshold.

5. The wiring length measurement apparatus according to claim 1,

wherein the judgment unit, in the event that the wiring has an arc portion, measuring the wiring length including an inner side arc length of the arc portion.

6. A recording media recording a program for functioning a computer, the computer comprising:

a distance calculation unit, by using a plurality of coordinates of bending points and a wiring width of CAD data of a high-density wiring including a meander wiring, seeking each endpoint that exists on an edge in a wiring width direction and is a flexion point of each inner circuit side, and calculating distances between each adjacent endpoint; and

a measurement unit measuring a wiring length of the high-density wiring by calculating a sum of the distances between each endpoint calculated by the distance calculation unit.

7. A wiring length measurement apparatus comprising:

a measurement candidate point setting unit setting a plurality of intersection points of boundary straight lines of the meander wiring that exist in the neighborhood of the corner coordinates for each corner coordinate as a plurality of measurement candidate points by using a wiring width and a plurality of corner coordinates of CAD data of a high-density wiring including the meander wiring;

a shortest calculation unit, for every two adjacent corner coordinates, calculating distances between all combinations of one of measurement candidate points responding to one corner coordinate and one of measurement candidate points responding to the other corner coordinate, and setting a shortest distance from the calculated distances between all the combinations for a shortest distance between adjacent corner coordinates; and

a sum calculation unit calculating a sum of shortest distances between every adjacent corner coordinates for a wiring length of the high-density wiring.

8. The wiring length measurement apparatus according to claim 7,

wherein the measurement candidate point setting unit setting, with respect to a starting point and an ending point of the corner coordinates, a plurality of intersecting points of the boundary straight line passing through the neighborhood of the corner coordinate and the straight line that passes through the corner coordinate and runs orthogonal to the boundary straight line as a plurality of measurement candidate points.

9. The wiring length measurement apparatus according to claim 7, further comprising:

an arc length calculation unit calculating an arc length of an inner circuit side of a corner part in each corner part of the high-density wiring,

wherein the measurement candidate point setting unit setting, with respect to a corner coordinate of the corner part, each intersection point as a plurality of measurement candidate points of a plurality of border straight lines that pass through a neighborhood of the corner part and the corner part'"'"'s arcs of the inner circuit side and outer circuit side,

the sum calculation unit that calculates the sum of the shortest distances between every adjacent corner coordinates and the arc length in each corner part calculated by the arc length measurement unit.

10. The wiring length measurement apparatus according to claim 7,

wherein the sum calculation unit calculating a sum of the distances between the corner coordinates as the high-density wiring'"'"'s wiring length in the event that a multiplication value of a semiconductor accumulation circuit'"'"'s signal frequency number, a wiring width, and a number of bending points is below a threshold.

11. The wiring length measurement apparatus according to claim 7,

wherein the meander wiring'"'"'s wiring width is set by 3m<

s<

10m and 5m<

b in an event that a meander wiring'"'"'s wiring width is m, an interval with the adjacent wiring is s, and a length from the protruded unit'"'"'s inner circuit side border to indented unit'"'"'s inner circuit side border is b.

12. A recording media recording a program for functioning a computer, the computer comprising:

a measurement candidate point setting unit setting a plurality of intersection points of boundary straight lines of the meander wiring that exist in the neighborhood of the corner coordinates for each corner coordinate as a plurality of measurement candidate points by using a wiring width and a plurality of corner coordinates of CAD data of a high-density wiring including the meander wiring;

a shortest calculation unit, for every two adjacent corner coordinates, calculating distances between all combinations of one of measurement candidate points responding to one corner coordinate and one of measurement candidate points responding to the other corner coordinate, and setting a shortest distance from the calculated distances between all the combinations for a shortest distance between adjacent corner coordinates; and

a sum calculation unit calculating a sum of shortest distances between every adjacent corner coordinates for a wiring length of the high-density wiring.