TCAD simulation DuTs

TCAD (Technology Computer-Aided Design) simulators often simulate just single devices and small volumes. As they allow to obtain special data from inside the device, they are different from circuit simulators.

DutTcad submodules

• dut_hdev module

TCAD class

Provdes a class for TCAD DuTs

Provides a interface superclass. Here all methods which must be implemented by all TCAD interfaces are collected.

Author: Mario Krattenmacher | Mario.Krattenmacher@semimod.de

class DMT.core.dut_tcad.DutTcad(database_dir, name, dut_type, inp_structure, **kwargs)

Bases: DutView

Superclass for common methods and attributes of TCAD DuTs

Makes a TCAD simulator like DEVICE or Hdev useable by DMT

Parameters:

database_dirstr

This is the directory were the DUT will create its database.

namestr

Prefix for the database

dut_typeDutType

Type of the DUT.

nodesstr

Strings with comma separated node names of DUT. If nodes is None, nodes will be requested from Dut_type class.

inp_structurestr or InpTcad

One of 3 different possibilities: special obj for create_inp_header(), string with path to file or direct input file string

simulator_commandstr

Command to start the correct TCAD simulator

simulator_argumentslist[str]

List of arguments for the simulator command, will be added one by one before the input file.

Attributes:

sim_commandstr

Command to start the correct TCAD simulator

sim_argslist[str]

List of arguments for the simulator command, will be added one by one before the input file.

Methods

inp_header(value)	Returns input header of a simulation input file, or sets it to a new value, removing attached files.
inp_structure(value)	Returns input structure for DUT, or sets it while automatically creating a new header.
get_hash()	Returns hash if inp_header is set.
get_start_sim_command()	Returns command to start a specific type of simulation (DEVICE, Hdev, …).
run_sim(sweep)	Starts a simulation.
create_inp_header(inp_structure)	Creates an inp_header for a given inp_structure. Has to be set by inheriting class.
set_param()	Enables setting model parameters for a simulation. Has to be set by in heriting class.
get_param()	Enables getting model parameters for a simulation. Has to be set by in heriting class.

create_inp_header(inp_structure)

Creates the inp_header from the given parameter object.

Parameters:

inp_structure

Type and content depends on implementation of inheriting class!

Returns:

str

Input circuit

classmethod from_json(json_content: Dict, classes_technology: List[Type[Technology]], subclass_kwargs: Dict | None = None) → DutTcad

Static class method. Loads a DutTcad object from a pickle file with full path save_dir.

Calls the from_json method of DutView with all dictionary inside the “parent” keyword. Afterwards the additional parameters are set correctly.

Parameters:

json_contentdict

Readed dictionary from a saved json DutTcad.

classes_technologyList[Type[Technology]]

All possible technologies this loaded DutTcad can have. One will be choosen according to the serialized technology loaded from the file.

subclass_kwargsDict, optional

Additional kwargs necessary to create the concrete subclassed DutView.

Returns:

DutTcad

Loaded object.

get_hash()

Returns a md5 hash generated from self.inp_header, if it is not set, this will return False!

In case a InpStructure is set, this always recreates the inp_header :/.

Returns:

str or False

info_json(**_kwargs) → Dict

Returns a dict with serializeable content for the json file to create.

The topmost dict MUST have only one key: The string casted class name. Inside the parameters are:

• A version key,

• all extra parameters of DutTcad compared to DutView and

• the info_json of DutView.

Returns:

dict

str(DutTcad): serialized content

property inp_header

Getter method for the input header of the simulation input file