"""Bondpad components for IHP PDK."""
from typing import Literal
import gdsfactory as gf
from .. import tech
from .ihp_pycell import bondpad as bondpadIHP
from .utils import *
[docs]
@gf.cell
def bondpad(
shape: Literal["octagon", "square", "circle"] = "octagon",
stack: Literal["t", "nil"] = "t",
fillMetals: Literal["t", "nil"] = "nil",
flipChip: Literal["yes", "no"] = "no",
diameter: float = 80.0,
hwQuota: float = 1,
topMetal: Literal["TM1", "TM2"] = "TM2",
bottomMetal: Literal["1", "2", "3", "4", "5", "TM1"] = "3",
addFillerEx: Literal["t", "nil"] = "nil",
passEncl: float = 2.1,
padType: Literal["bondpad", "probepad"] = "bondpad",
) -> gf.Component:
"""Create a bondpad for wire bonding or flip-chip connection.
This function generates a parametric bondpad with configurable shape,
metal stack, size, passivation, filler, and flip-chip options.
Args:
shape: Shape of the bondpad. Options: 'octagon', 'square', 'circle'.
stack: Stack all metal layers from bottom to top ('t' or 'nil').
fillMetals: Add metal fill patterns ('t' for yes, 'nil' for no).
flipChip: Enable flip-chip configuration ('yes' or 'no').
diameter: Diameter or size of the bondpad in micrometers.
hwQuota: Height/width quota for pad design rules.
topMetal: Name of the top metal layer. Options: 'TM1', 'TM2'.
bottomMetal: Name of the bottom metal layer. Options: '1', '2', '3', '4', '5', 'TM1'.
addFillerEx: Exclude metal filler ('t' or 'nil').
passEncl: Passivation enclosure around the pad, in micrometers.
padType: Type of pad. Options: 'bondpad', 'probepad'.
Returns:
gdsfactory.Component: The generated bondpad layout.
"""
params = {
"cdf_version": tech.techParams["CDFVersion"],
"model": "bondpad", # hardcoded for bondpad
"Display": "Selected",
"shape": shape,
"stack": stack,
"fill": fillMetals,
"FlipChip": flipChip,
"diameter": diameter * 1e-6,
"hwquota": hwQuota,
"topMetal": topMetal,
"bottomMetal": bottomMetal,
"addFillerEx": addFillerEx,
"passEncl": passEncl * 1e-6,
"padType": padType,
"padPin": "PAD",
}
c = generate_gf_from_ihp(
cell_name="bondpad", cell_params=params, function_name=bondpadIHP()
)
# Adjust port orientations, for metal1 so every other port points in the opposite direction
# for i, port in enumerate(c.ports):
# port.orientation = 90 if port.name.startswith("DS_") and i % 2 == 1 else port.orientation
return c
[docs]
@gf.cell
def bondpad_array(
n_pads: int = 4,
pad_pitch: float = 100.0,
pad_diameter: float = 68.0,
shape: Literal["octagon", "square", "circle"] = "octagon",
stack_metals: Literal["t", "nil"] = "t",
) -> gf.Component:
"""Create an array of bondpads.
Args:
n_pads: Number of bondpads.
pad_pitch: Pitch between bondpad centers in micrometers.
pad_diameter: Diameter of each bondpad in micrometers.
shape: Shape of the bondpads.
stack_metals: Stack all metal layers.
Returns:
Component with bondpad array.
"""
c = gf.Component()
for i in range(n_pads):
pad = bondpad(
shape=shape,
stack=stack_metals,
diameter=pad_diameter,
)
pad_ref = c.add_ref(pad)
pad_ref.movex(i * pad_pitch)
return c
if __name__ == "__main__":
# Test the components
c1 = bondpad(shape="octagon")
c1.show()
c2 = bondpad(shape="square", flip_chip=True)
c2.show()
c3 = bondpad_array(n_pads=6)
c3.show()
