DRC - Comparison of widths of the largest areas of shapes in the two layers

Apple

Hi,I am currently learning DRC using Python, but now I have encountered two problems related to DRC.Now I have three layers: layer 1 (red), layer 2 (green), and layer 3 (blue).. As shown in the figure: 1. The outer boundary of the largest polygon in layer 1 (RED) must be at least 10 um away from the outer boundary of the largest polygon in layer 2 (GRN) (that is, a >= 10); if the distance is less than 10 um, a DRC error will be reported; 2. The inner boundary of the largest polygon in layer 2 (GRN) must be 5 um away from the inner boundary of the largest polygon in layer 3 (BLUE) (that is, b = 5 um); if the distance is not equal to 5 um, a DRC error will occur.

Matthias

This should be a classic application of the "enclosing" rule (https://www.klayout.de/doc-qt5/about/drc_ref_layer.html#h2-894).

Matthias

Apple

Hi Matthias, using encosingmethod, I can indeed solve the condition a >= 10. However, when I check b = 5, the position c will also be judged as violating the rule. I only want to check the position of b and don't want to check the position of c. How can I solve this problem? thank you
l1= input(1,0)
l2 = input(2,0)
l3 = input(3,0)
RED_Max_edge = l1.drc((area>10.um).hulls)
BMG_Max_edge = l3.drc((area>10.um).hulls)
RED_Max_edge.drc(enclosing(BMG_Max_edge,projection) < 5.um).output("BMG is enclosed RED by at least 10um")

Matthias

I don't understand. Your script does not involve layer 2/0 (l2 is not used). So how can c be flagged in that script?

Plus maybe you should upload your sample file (.zip it before). It's hard to see how the red and blue layers overlap.

Matthias

laurent_c

This DRC script will do the job, but it is DRC script, not a python script :

RED= input(1,0)
GREEN = input(2,0)
BLUE = input(3,0)

RG = RED & GREEN
RGB = RG & BLUE

RED.enclosing(RG, 10.0, euclidian).output("RED_enc_RG", "Min. RED enclosing RED-GREEN : 10um")
RG.enclosing(RGB, 5.0, euclidian).output("RG_enc_RGB", "Min. RED-GREEN enclosing RED-GREEN-BLUE : 5um")
RGB.width(5.0, euclidian).output("RGB_width", "Min. RED-GREEN-BLUE width : 5um")

BRgds,

Laurent