.. THIS FILE WAS AUTOGENERATED BY GENERATE_TUTORIALS.PY. ANY CHANGES WILL BE OVERWRITTEN.

.. _experiment_generate_beginner2:
Creation of positive-tone ebeam layouts with ``experiment.generate``
====================================================================

Now, we will demonstrate how to generate a layout with ``experiment.generate`` for a positive-tone
ebeam lithography process using two layers for different beam currents.

Imports are the same as in :ref:`experiment_generate_beginner1`:

.. code-block:: python
   :linenos:

   import qnngds as qg
   import phidl.geometry as pg
   from phidl import quickplot as qp
   from functools import partial
   

When setting up the PDK, we define two layers this time, as well as a new interlayer transition between
them using ``geometries.fine_to_coarse``.
Note the ``outline`` argument being passed to the ``Layer`` constructor.

.. code-block:: python
   :linenos:

   ls = qg.LayerSet()
   ls.add_layer(qg.Layer(name="EBEAM_FINE", gds_layer=1, outline=0.1))
   ls.add_layer(qg.Layer(name="EBEAM_COARSE", gds_layer=2, outline=10))
   cross_sections = dict(
       ebeam=partial(qg.geometries.default_cross_section, layer="EBEAM_COARSE"),
   )
   layer_transitions = {
       ("EBEAM_FINE", "EBEAM_COARSE"): partial(
           qg.geometries.fine_to_coarse,
           layer1="EBEAM_FINE",
           layer2="EBEAM_COARSE",
       )
   }
   layer_transitions |= qg.layer_auto_transitions(ls)
   PDK = qg.Pdk(
       "single_layer_postone_ebeam_pdk",
       layers=ls,
       cross_sections=cross_sections,
       layer_transitions=layer_transitions,
   )
   PDK.activate()

The rest of the code is almost the same as in :ref:`experiment_generate_beginner1`:

.. code-block:: python
   :linenos:

   ntron = qg.devices.ntron.sharp(layer="EBEAM_FINE")
   ext = partial(
       pg.optimal_step, end_width=1, symmetric=True, layer=qg.get_layer("EBEAM_FINE")
   )
   dut = qg.utilities.extend_ports(
       device=ntron, port_names=["g", "s", "d"], extension=ext, auto_width=True
   )
   pad_array = qg.pads.array_single(
       pad_specs=(qg.pads.stack(size=(200, 200), layers=("EBEAM_COARSE",)),),
       columns=1,
       rows=3,
       pitch=250,
   )
   route_groups = (
       qg.experiment.RouteGroup(qg.get_cross_section("ebeam"), {"g": 2, "s": 1, "d": 3}),
   )
   c = qg.experiment.generate(
       dut=dut,
       pad_array=pad_array,
       label=None,
       route_groups=route_groups,
       dut_offset=(350, 250),
       pad_offset=(0, 0),
       label_offset=(0, 0),
       retries=1,
   )
   qp(c)


.. image:: experiment_generate_beginner2.png
Zooming in on the nTron:

.. image:: experiment_generate_beginner2_zoom.png


Reference
---------

.. code-block:: python
   :linenos:

   import qnngds as qg
   import phidl.geometry as pg
   from phidl import quickplot as qp
   from functools import partial
   
   ls = qg.LayerSet()
   ls.add_layer(qg.Layer(name="EBEAM_FINE", gds_layer=1, outline=0.1))
   ls.add_layer(qg.Layer(name="EBEAM_COARSE", gds_layer=2, outline=10))
   cross_sections = dict(
       ebeam=partial(qg.geometries.default_cross_section, layer="EBEAM_COARSE"),
   )
   layer_transitions = {
       ("EBEAM_FINE", "EBEAM_COARSE"): partial(
           qg.geometries.fine_to_coarse,
           layer1="EBEAM_FINE",
           layer2="EBEAM_COARSE",
       )
   }
   layer_transitions |= qg.layer_auto_transitions(ls)
   PDK = qg.Pdk(
       "single_layer_postone_ebeam_pdk",
       layers=ls,
       cross_sections=cross_sections,
       layer_transitions=layer_transitions,
   )
   PDK.activate()
   ntron = qg.devices.ntron.sharp(layer="EBEAM_FINE")
   ext = partial(
       pg.optimal_step, end_width=1, symmetric=True, layer=qg.get_layer("EBEAM_FINE")
   )
   dut = qg.utilities.extend_ports(
       device=ntron, port_names=["g", "s", "d"], extension=ext, auto_width=True
   )
   pad_array = qg.pads.array_single(
       pad_specs=(qg.pads.stack(size=(200, 200), layers=("EBEAM_COARSE",)),),
       columns=1,
       rows=3,
       pitch=250,
   )
   route_groups = (
       qg.experiment.RouteGroup(qg.get_cross_section("ebeam"), {"g": 2, "s": 1, "d": 3}),
   )
   c = qg.experiment.generate(
       dut=dut,
       pad_array=pad_array,
       label=None,
       route_groups=route_groups,
       dut_offset=(350, 250),
       pad_offset=(0, 0),
       label_offset=(0, 0),
       retries=1,
   )
   qp(c)