DRC Radius check with perpendicalur segments

andyL

To verify a radius I check for a notch on a polygon selecting all edges perpendicalur to each other:

GRID=0.1
IN    = input(1, 0)
IN_EDGES = IN.edges
IN_EDGE_90  = IN_EDGES.with_angle(90)
radiusInner=4.0
drc_mrk = IN_EDGE_90.notch(radiusInner*1.41421356-GRID/2)
drc_mrk.output( "Inner Radius smaller 4.0" )

I can't use an edge layer to verify a notch but I struggle to rebuild a polygon out of the extracted edges. Is the collect command to be used for it?
In addition I try to use math::sqrt(2) as a function (rather then 1.41..) - but it works only when RBA is defined. Is there a way to use the math function in a DRC deck ?

Thanks a lot,
Andy

Matthias

Hi Andy,

With edge layers there is no difference between space, notch and isolated because these methods act on edges depending on whether they belong to the same polygon or not. So for edge layers there is only "space".

But I wonder if your approach is the right one: with_angle(90) will only select vertical edges. To get the horizontal ones, you'd need width_angle(0). You could then do a separation test. For the separation use an angle limit to make sure 90 perpendicular edges are included:

r = input(1, 0).rounded_corners(0.5.um, 0.5.um, 64)
r.output(10, 0)
re = r.edges
rv = re.with_angle(90)
rh = re.with_angle(0)
rv.output(11, 0)
rh.output(12, 0)
rv.sep(rh, 0.8.um, angle_limit(91)).output(20, 0)

andyL

Hello Matthias,
thanks a lot for your feedback. The sep check provides me the same result as used in a 3rd party tool - this is great! Target was to migrate the rules into KL and the Radius check was a critical one missing. Especially the combination with the DRC browser makes KL an incredible tool for DRC checking.
By the way - congrats to the new Forum. Now it's quite easy with a png file to describe the issue tobe solved.

Best Regards,
Andy

andyL

Here the final script to run a quick-drc:

include RBA

        app = RBA::Application.instance
        mw = app.main_window
        view = mw.current_view
        cv = view.cellview(view.active_cellview_index)
        layoutView=view.active_cellview().layout()


        if !view
           raise "No view selected"
        end

# pre- settings

        dialog = QDialog.new(Application.instance.main_window)
        dialog.windowTitle = "Quick DRC check"

        layout = QVBoxLayout::new(dialog)
        dialog.setLayout(layout)

# separation line
        label = QLabel.new(dialog)
        layout.addWidget(label)
        label.text = "Quick DRC on SAME layer ...\n\n >> Please select at least one Layer << \n"

# variable text input :
        label = QLabel.new(dialog)
        layout.addWidget(label)
        label.text = "min. width [um] (0: No check)"
        variable1 = QLineEdit.new(dialog)
        layout.addWidget(variable1)
        variable1.text = "0"

        label = QLabel.new(dialog)
        layout.addWidget(label)
        label.text = "min spacing [um] (0: No check)"
        variable2 = QLineEdit.new(dialog)
        layout.addWidget(variable2)
        variable2.text = "0"

# separation line
        label = QLabel.new(dialog)
        layout.addWidget(label)
        label.text = "\n"

        label = QLabel.new(dialog)
        layout.addWidget(label)
        label.text = "Inner Radius [um] (0: No check)"
        variable4 = QLineEdit.new(dialog)
        layout.addWidget(variable4)
        variable4.text = "0"


        label = QLabel.new(dialog)
        layout.addWidget(label)
        label.text = "Outer Radius [um] (0: No check)"
        variable5 = QLineEdit.new(dialog)
        layout.addWidget(variable5)
        variable5.text = "0"


# separation line
        label = QLabel.new(dialog)
        layout.addWidget(label)
        label.text = "\n"


# radio buttons
        check1 = QCheckBox.new(dialog)
        layout.addWidget(check1)
        check1.text = "Speed up (tiling 1mm/1mm) 8 cores"


# separation line
        label = QLabel.new(dialog)
        layout.addWidget(label)
        label.text = "\n"

# OK button 
        buttonOK = QPushButton.new(dialog)
        layout.addWidget(buttonOK)
        buttonOK.text = " ok "
        buttonOK.clicked do 
         dialog.accept()
         myText = {}

#v1 - width
#v2 - space
#v3 -  layer layer
#v33 - layer datatype
#v4 - inner radius
#v5 - outer radius


         v1=(variable1.text).to_f
         v2=(variable2.text).to_f
         v4=(variable4.text).to_f
         v5=(variable5.text).to_f


# get selected layers
            sel_layers = view.selected_layers
            if !sel_layers || sel_layers.size == 0
                raise "No layer(s) selected"
            end
            myText = "report(\"DRC_Check.rpt\")\n"

            sel_layers.each do |l|
                li = l.current.layer_index
                if cv.layout.is_valid_layer?(li)
                    layer_info=layoutView.get_info(li) 
                    v3=layer_info.layer
                    v33=layer_info.datatype
            myText += "layerDRC = input(#{v3}, #{v33})\n"
            if (check1.isChecked()) 
               myText += "tiles(1.mm, 1.mm) \n"
               myText += "threads(8) \n"
            end

            if (v2>0)
              myText += "drc_mrk = layerDRC.space(#{v2}, projection, angle_limit(90)) \n"
              myText += "drc_mrk.output( \"Quick-DRC Same layer spacing: Layer layerDRC (#{v3},#{v33}) < #{v2} um\" ) \n"
            end

            if (v1>0)
              myText += "drc_mrk = layerDRC.width(#{v1}, projection, angle_limit(90)) \n"
              myText += "drc_mrk.output( \"Quick-DRC Layer width: Layer layerDRC (#{v3},#{v33}) < #{v2} um\" ) \n"
            end             

            if (v4>0)
              myText += "layerDRC_edges = layerDRC.edges \n"
              myText += "layerDRC_edgeV = layerDRC_edges.with_angle(90) \n"
              myText += "layerDRC_edgeH = layerDRC_edges.with_angle(0) \n"
              myText += "drc_mrk = layerDRC_edgeV.sep(layerDRC_edgeH, #{v4}, angle_limit(91)) \n"
              myText += "drc_mrk.output( \"Quick-DRC Layer Inner Radius: layerDRC (#{v3},#{v33})< #{v4} um\" ) \n"
            end             

            if (v5>0)
              myText += "layerDRCtmp = extent - layerDRC \n"
              myText += "layerDRCtmp_edges = layerDRCtmp.edges \n"
              myText += "layerDRCtmp_edgeV = layerDRCtmp_edges.with_angle(90) \n"
              myText += "layerDRCtmp_edgeH = layerDRCtmp_edges.with_angle(0) \n"
              myText += "drc_mrk = layerDRCtmp_edgeV.sep(layerDRCtmp_edgeH, #{v5}, angle_limit(91)) \n"
              myText += "drc_mrk.output( \"Quick-DRC Layer Outer Radius: layerDRC (#{v3},#{v33}) < #{v5} um\" ) \n"
            end             

          end # end if layer vaild
        end # end selected layers    

            if ((v5>0)||(v4>0) ||(v2>0)||(v1>0))
            print(myText)             
            # Execute the DRC script
            eng = DRC::DRCEngine::new
            eng.instance_eval(myText)
            eng._finish
            else
            print"\n No valid vlaue to check \n"
            errorText = "Error: No valid value for DRC specified. At least one must be larger 0."
            RBA::MessageBox::info("Klayout QuickDRC", errorText, RBA::MessageBox::b_ok)
            end


    end #end press ok procedure 



# cancel button
        cbutton = QPushButton.new(dialog)
        layout.addWidget(cbutton)
        cbutton.text = " Cancel "
        cbutton.clicked do 
        dialog.accept()
        end

#dialog.exec
dialog.show