25 add thin film reference to pvd process (#26)

* Added thin-film to PVD process

* Changed to append task out- and inputs

src/nomad_material_processing/__init__.py

@@ -353,9 +353,9 @@ def normalize(self, archive: 'EntryArchive', logger: 'BoundLogger') -> None:
             previous = None
             for step in self.steps:
                 task = step.to_task()
-                task.outputs = [Link(name=step.name, section=step)]
+                task.outputs.append(Link(name=step.name, section=step))
                 if previous is not None:
-                    task.inputs = [Link(name=previous.name, section=previous)]
+                    task.inputs.append(Link(name=previous.name, section=previous))
                 tasks.append(task)
                 previous=step
             archive.workflow2.tasks = tasks

src/nomad_material_processing/physical_vapor_deposition.py

@@ -41,6 +41,7 @@
 from nomad_material_processing import (
     SampleDeposition,
     ThinFilmStack,
+    ThinFilm,
 )
 
 if TYPE_CHECKING:
@@ -214,6 +215,12 @@ class PVDSubstrate(ArchiveSection):
         ''',
         type=ThinFilmStack,
     )
+    thin_film = Quantity(
+        description='''
+        The thin film that is being created during this step.
+        ''',
+        type=ThinFilm,
+    )
     temperature = SubSection(
         section_def=PVDSubstrateTemperature,
     )