Coverage for tests/rcx25/rcx25_CC_gf180mcuD_test.py: 100%

1# 

2# -------------------------------------------------------------------------------- 

3# SPDX-FileCopyrightText: 2024-2026 Martin Jan Köhler and Harald Pretl 

4# Johannes Kepler University, Institute for Integrated Circuits. 

5# 

6# This file is part of KPEX 

7# (see https://github.com/iic-jku/klayout-pex). 

8# 

9# This program is free software: you can redistribute it and/or modify 

10# it under the terms of the GNU General Public License as published by 

11# the Free Software Foundation, either version 3 of the License, or 

12# (at your option) any later version. 

13# 

14# This program is distributed in the hope that it will be useful, 

15# but WITHOUT ANY WARRANTY; without even the implied warranty of 

16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

17# GNU General Public License for more details. 

18# 

19# You should have received a copy of the GNU General Public License 

20# along with this program. If not, see <http://www.gnu.org/licenses/>. 

21# SPDX-License-Identifier: GPL-3.0-or-later 

22# -------------------------------------------------------------------------------- 

23# 

24 

25import allure 

26import pytest 

27 

28from rcx25_test_helpers import * 

29 

30parent_suite = "kpex/2.5D Extraction Tests [PDK gf180mcuD | mode CC]" 

31tags = ("PEX", "2.5D") 

32 

33 

34pex_whiteboxed = RCX25Extraction(pdk=PDKTestConfig(PDKName.GF180MCUD), pex_mode=PEXMode.CC, blackbox=False) 

35pex_blackboxed = RCX25Extraction(pdk=PDKTestConfig(PDKName.GF180MCUD), pex_mode=PEXMode.CC, blackbox=True) 

36 

37 

38@allure.parent_suite(parent_suite) 

39@allure.tag(*tags) 

40@pytest.mark.slow 

41def test_mim_cap__whiteboxed(): 

42 # The device model cap_mim_2f0_m4m5_noshield gives c_cox 1.99 fF/µm² * A + c_capsw 0.2383 fF/µm * P: 

43 # 5 µm x 5 µm: 49.75 fF + 4.77 fF = 54.52 fF (TOP1 - BOT1) 

44 # 20 µm x 10 µm: 398.0 fF + 14.30 fF = 412.30 fF (TOP2 - BOT2) 

45 pex_whiteboxed.assert_expected_matches_obtained( 

46 'test_patterns', 'cap_mim_m4m5.gds.gz', 

47 expected_csv_content="""Device;Net1;Net2;Capacitance [fF];Resistance [Ω] 

48C1;BOT1;BOT2;0.132; 

49C2;BOT1;TOP1;54.685; 

50C3;BOT1;TOP2;0.034; 

51C4;BOT1;VSUBS;0.836; 

52C5;BOT2;TOP1;0.024; 

53C6;BOT2;TOP2;412.805; 

54C7;BOT2;VSUBS;3.474; 

55C8;TOP1;TOP2;0.183; 

56C9;TOP1;VSUBS;0.449; 

57C10;TOP2;VSUBS;1.603;""" 

58 ) 

59 

60 

61@allure.parent_suite(parent_suite) 

62@allure.tag(*tags) 

63@pytest.mark.slow 

64def test_mim_cap__blackboxed(): 

65 # The black-box extraction leaves the MIM caps to the device model, with both of their plates, 

66 # FuseTop and the Metal4 under it (LVS layer metal4_cap), so there's no Metal5 over Metal4 under the top plates, 

67 # which added 8.758 fF to TOP2 - BOT2 (2 % of the device) and 1.28 fF to TOP1 - BOT1. 

68 # Between the plates, the fringe between Metal5 and the Metal4 around the bottom plates is left. 

69 pex_blackboxed.assert_expected_matches_obtained( 

70 'test_patterns', 'cap_mim_m4m5.gds.gz', 

71 expected_csv_content="""Device;Net1;Net2;Capacitance [fF];Resistance [Ω] 

72C1;BOT1;BOT2;0.15; 

73C2;BOT1;TOP1;0.884; 

74C3;BOT1;TOP2;0.031; 

75C4;BOT1;VSUBS;0.879; 

76C5;BOT2;TOP1;0.021; 

77C6;BOT2;TOP2;2.844; 

78C7;BOT2;VSUBS;3.112; 

79C8;TOP1;TOP2;0.118; 

80C9;TOP1;VSUBS;0.594; 

81C10;TOP2;VSUBS;2.763;""" 

82 ) 

83 

84 

85@allure.parent_suite(parent_suite) 

86@allure.tag(*tags) 

87@pytest.mark.slow 

88def test_well_diodes__blackboxed(): 

89 # The well diodes of the PDK's KLayout pcells (2 µm x 4 µm, 3.3V), their models are diode_pw2dw, diode_dw2ps 

90 assert pex_blackboxed.written_device_lines('test_patterns', 'diode_pw2dw_dw2ps_03v3_w2_l4.gds.gz') == [ 

91 'D$1 PW2DW_P PW2DW_N diode_pw2dw area=8e-12 pj=1.2e-05', 

92 'D$2 SUB DW2PS_N diode_dw2ps area=8e-12 pj=1.2e-05', 

93 ]