def METHOD_NAME(
    self,
    tech_dir: PathType,
    lyp_filename: str = "layers.lyp",
    lyt_filename: str = "tech.lyt",
    d25_filename: str | None = None,
    mebes_config: dict | None = None,
) -> None:
    """Write technology files into 'tech_dir'.
    Args:
        tech_dir: Where to write the technology files to.
        lyp_filename: Name of the layer properties file.
        lyt_filename: Name of the layer technology file.
        d25_filename: Name of the 2.5D stack file (only works on KLayout >= 0.28). Defaults to self.name.
        mebes_config: A dictionary specifying the KLayout mebes reader config.
    """
    from gdsfactory.utils.xml_utils import make_pretty_xml
    d25_filename = d25_filename or f"{self.name}.lyd25"
    tech_path = pathlib.Path(tech_dir)
    lyp_path = tech_path / lyp_filename
    lyt_path = tech_path / lyt_filename
    d25_path = tech_path / "d25" / d25_filename
    d25_dir = tech_path / "d25"
    d25_dir.mkdir(exist_ok=True, parents=True)
    if not self.technology.name:
        self.technology.name = self.name
    self.technology.layer_properties_file = lyp_path.name
    if self.layer_views:
        self.layer_views.to_lyp(lyp_path)
        print(f"Wrote {str(lyp_path)!r}")
    root = ET.XML(self.technology.to_xml().encode("utf-8"))
    # KLayout tech doesn't include mebes config, so add it after lefdef config:
    if not mebes_config:
        mebes_config = {
            "invert": False,
            "subresolution": True,
            "produce-boundary": True,
            "num-stripes-per-cell": 64,
            "num-shapes-per-cell": 0,
            "data-layer": 1,
            "data-datatype": 0,
            "data-name": "DATA",
            "boundary-layer": 0,
            "boundary-datatype": 0,
            "boundary-name": "BORDER",
            "layer-map": "layer_map()",
            "create-other-layers": True,
        }
    mebes = ET.Element("mebes")
    for k, v in mebes_config.items():
        v = str(v).lower() if isinstance(v, bool) else str(v)
        ET.SubElement(mebes, k).text = v
    reader_opts = root.find("reader-options")
    lefdef_idx = list(reader_opts).index(reader_opts.find("lefdef"))
    reader_opts.insert(lefdef_idx + 1, mebes)
    if self.layer_stack:
        dbu = len(str(self.technology.dbu).split(".")[-1])
        d25_script = (
            prefix_d25
            + self.layer_stack.get_klayout_3d_script(
                layer_views=self.layer_views,
                dbu=dbu,
            )
            + suffix_d25
        )
        d25_path.write_bytes(d25_script.encode("utf-8"))
        print(f"Wrote {str(d25_path)!r}")
    self._define_connections(root)
    lyt_path.write_bytes(make_pretty_xml(root))
    print(f"Wrote {str(lyt_path)!r}")