Core_EDA

# RC parasitic extraction and LPE

## ESD

□5田0片0叩D叩陈叩□ 博叩～0

ESD background introduction: Giga_DA_ESD_Models_Devices_and_Analysis.pptx ESD reference paper: ming-douker1999.pdf (From Dr. Shi)

ESD reference paper: 02_Simulating_Electrostatic_Discharge.pdf (From Jeff)

ESD online training: https://www.bilibili.com/video/BV1C34y1p7Jk?share_source=copy_web&vd_source=d04eb1abca6ba586bf0375f4ee96ad31 (From Dr. Chen)

## LVS

LVS introduction: http://10.30.200.21:8088/projects/hongtu-emir/wiki/LVS_introduction

## Resistance and capacitance

Professional link (By Xu): http://10.30.200.21:8088/projects/understand-aguda/wiki/Understand_LPE Professional introduction (By Xu): http://10.30.200.21:8088/projects/understand-aguda/wiki/LPE_Basic

## Cap and resistance introduction

Background knowledge (where cap comes from):	ECE4121Lec08Wire.pdf , CapacitanceDrivingaLoadannotated.pdf IR analysis cap contributor: about_cap_clean.pptx

Resistance usage model and background: Resistance_analysis_and_report.pptx 

### [[Chip_RC_Correlation]]

## Regression and QA method

Regression location: `ut/tests/ut/vp/ir/resistance`

Regression command 1: `qa_report_pg_resistance`

Regression command 2: `qa_report_detail_regression`

Regression command 3(obsolete): `qa_analyze_power_network res golden_res_file test_res_file`

## Effective resistance

New usage

```

analyze—pg—resistance -net VDD -effective  [-generate—supply—location (hidden option)]

髻 by default, 10 worst instance will be reported. if -number—of—worst set to 0 or negative, report

 all

report—pg—resistance -net VDD -effective [-number—of—worst 10] report—pg—resistance -net VDD cell—name -effective

髻 will dump all the result to file

report—pg—resistance -net VDD -effective -number—of—worst 0 -output—file xxx.rpt

髻 will show heat map in G·r without re-build graph show—effective—resistance—map 

髻 below error out since -detail only support in min-path mode report—pg—resistance -net VDD cell—name -detail

```

~~Old usage:~~

```

set—app—var ir calc—resist—mode Fl.AT

analy江e—power—network -net VDD -res—only [-generate—supply—location] 

report—power—network -net VDD -type res

```

## Min-path resistance

New usage

```

analy江e—pg—resistance -net VDD  [-generate—supply—location (hidden option)]

髻 by default, 10 worst instance will be reported. if -number—of—worst set to 0 or negative, report all

report—pg—resistance -net VDD [-number—of—worst 10] report—pg—resistance someCell -high—light -detail -net VDD

髻 will dump all the result to file

report—pg—resistance -net VDD -number—of—worst 0 -output—file xxx.rpt

髻 will show up heat map in G·r, power min-path, ground min-path, total min-path will display

髻 if a cell is not connected to power/ground, the color annotation will be skiped. rn the total re sistance calculation, the un-connected net res is regarded as 江ero.

show—min—path—resistance—map 

```

~~Old usage:~~

```

set—app—var ir calc—resist—mode S:ORTPAT:

analy江e—power—network -net VDD -res—only [-generate—supply—location] report—power—network -net VDD -type res -inst xxx -high—light report—power—network -net VDD -type res -path—number 4

```

## Debug pg resistance

See Generic testing SoP:

http://10.30.200.21:8088/projects/hongtu-emir/wiki/Generic_Testing_SoP#section-10

## Open-short and missing via check

```

verify—power—network 

check—pg—vias

```

1. :VP O 叩 check—pg—vias D叩D叩D叩D叩D叩D叩missing viaD

	get—ob“—attr [get—violations -checker pgroute] bbox

2. :VP O 叩 verify—power—network D叩D叩D叩D叩D叩D 叩 open/short/floating (open D叩D )D

	get—ob“—attr [get—violations -checker layout—verifier -filter—by {rule == open}] bbox

## Regression location

ut/tests/ut/vp/ut_run/ir/resistance/xxx

## VIA resistance (TBD.)

analy江e—via—resistance

## compare resistance by layer

DDDDD D  min-path D叩D叩D叩D叩叩叩D叩度叩0叩D叩D叩D叩D叩D叩叩叩总叩叩叩叩叩映叩D叩导叩ir叩叩叩em叩叩叩 

	D 叩D叩D叩DD叩D叩叩叩叩res改叩就叩须叩D static irDDDDDD叩DDDDDD叩DD希叩□ :VP D Ref tool D detail res 门叩叩叩叩叩D叩D叩 

DDD□ :VP D Ref tool D min res detail path门叩叩叩叩叩D叩叩并叩D叩叩叩叩叩 

D叩D 

compare—detail—path—resistance -input—file minPath.rk [-output—file compare.result] [-plot—scatter

]

□叩flowD

...

set—app—var ir save—graph true analy江e—pg—resistance

compare—detail—path—resistance -input—file minPath.rk -output—file compare.result

DDDinput_fileDredhawkOmin resistance detail path report, D叩DD叩

![](clipboard-202503291818-h0thk.png)

output_fileDDDDDDODDDDDD叩DD叩

![](clipboard-202503291818-ouxcn.png)

DDDD-plot_scatterDDDDDDDDD田叩

![](clipboard-202503291818-dsdqi.png)

## RC extraction

500 

[[LPE_Lecture_and_Reference]]

### About rlc model

RCGEN_USAGE.pdf (from XuLuo 20230905)

#### Base method (Obsolete)

DDDD layer D DD叩叩DDDDDDD叩叩叩DD 叩 (DD D rlc DODD )

1.D叩 1叩set—linear—unit—rlc (DD叩叩叩叩叩叩D导叩叩叩DD候 叩 unitR / width * length

	D DDDDD叩DDDDDDDDD叩D叩叩叩叩DDD叩DDDDDDDDDDD 

2.D叩 2叩 set—resistance—table (DODDD伲插叩叩 叩 叩D导叩叩叩DD候 叩 lpm->CalcMetalR叩叩DD导叩叩叩 

	D DD叩DD叩叩DD叩D叩D叩DDD 

D叩 1DDD叩D叩DD signoff emirDD叩DDD叩D叩 2DD叩 

#### Advanced method: (New engine from Xu, after 20220310)

See: http://10.30.200.21:8088/issues/7418

first phase changes:

1.ir rc_multi_threads 1: valid in "ir rc_mode 2", changed to on by default

2.ir rc_keep_pg_only 0: valid in "ir rc_mode 2", new, off (high accuracy) by default, will be on (medium accuracy, aligned with RH, equivalent to internal param "ir rc_ignore_mode 0x248") controled by other new coming ir params (like "ir accuracy_level high", will be followed up by Jun)

3.ir rc_mode 0/1/2: 0 existing auto-mode, will be retired, 1 forcedly unitR/C, 2 exact RC extraction like signal (will be on by default for signoff VP, followed up by Jun), no further change for now.

todo list:

1.px dont_extract_cap 1: on by default for static IR-drop analysis if "ir rc_mode 2" is set

2.new ir param (e.g., accuracy_level medium [ I low I high]), to be discussed with Jun to turn on below params: 

low:

ir rc_mode 1 

medium:

ir rc_mode 2

ir rc_keep_pg_only 1 

high:

ir rc_mode 2

ir rc_keep_pg_only 0

3.change default value for below two params:

3.1param "ir rc_keep_pg_only_tv 1" : change default from 0 to 1 for thickness variation.

3.2param "ir rc_keep_pg_only_cap 1": change default from 0 to 1 for cap weighting factor.