Core_EDA

# RC parasitic extraction and LPE

## ESD

□5田0片0叩D叩陈叩□ 博叩～0

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

ESD reference paper: attachment:"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):	attachment:"ECE4121Lec08Wire.pdf" , attachment:"CapacitanceDrivingaLoadannotated.pdf" IR analysis cap contributor: attachment:"about_cap_clean.pptx"

Resistance usage model and background: attachment:"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

attachment:"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.

## Advanced method: (Default method in EMIR Obsoleted after 20220310)

D叩 signal RC 引叩D叩PG RC:

set—app—var ir rc—mode 2

to enable MT run (temp param, default off for now, could be on by default if stable): set—app—var ir rc—multi—thread 1

D叩rlcDDD叩PG RC:

调叩resistance D capacitance ODD叩列DD叩 D田RC□DDDD 

1. DDDDDDDDDDDDDDDDDOresDcapDO叩

set—app—var ir rc—mode 1

髻 for debug for debug purpose set—app—var ir debug—rc 1 

2. DDDDDDDDD DDODDDDDDDODDDDDDDDDDDDDDDDDDDDDDDDDrlcDDDOetchingDD 

髻 default minimal spacing 3.5 set—app—var ir r—spacing—factor 1.5 set—app—var ir c—spacing—factor  1.5

3. DD02DDworkD叩叩DDparamD

50micron X 50micron DDDtableDDDDDDwindowDODDDDDDDDD 

set—app—var ir r—density 1.5 set—app—var ir c—density 1.5

4. DDD叩甩叩 R C spacing factor: ooD加O app_var 有叩高叩先叩 

set—pg—rc—config 

5. verify resistance value by

report—pg—rc -layer M1 -area {llx lly urx ury}

report pg rc for "ir mode 2" using sigal like RC extraction model report—pg—rc -bbox {llx lly urx ury} -net VDD -layer M1

Example: if a wire start from 2327.765 to 2330.39, width is 0.15 micron. Run below command to check rc engine

set—app—var rc—mode 2

report—pg—rc -bbox {232l.l65	3354.l8-0.0l5  2330.39	3354.l8+0.0l5 } -net DVDD

6. test case and data

### about spef

判叩 spef DDDD叩 lpe::HasFileRC

6. import rlc model by (From Xu Luo):

after source .rlc file, you shall set the command "set—parasitic—condition cmax" for  l.PF module to use this cmax model.

besides, you may report pg rc by setting -length/-width, 

e.g., "report—pg—rc -layer M1 -length 10 -width 1" instead of "report—pg—rc -layer M1",  

as empty -length/-width is equivalent as 江ero length/width for the command.

## RC for DMP

DDDD田DDDDDcacheDDDDDDDD 

"analy江e—pg—resistance -net VDD" 

"cache—pg—resistance db -net VDD -graph—name "vdd.pgraph1" "  //当DD叩□ cache叩二叩制DO叩 

masterD叩DD田DDDDDload DDDOpgraph DDDDDDDDDpgraphDD行DDDOD

"restore—pg—graph db -net VDD -graph—name "vdd.pgraph1 vdd.pgraph2 .... " " //当DD叩□ cache叩二叩制DO叩 

## sanity resistance check

D田田D轻叩DrlcDD叩测Dhvp  compose_top_design DDsource D rlcDDD就田田D始D行叩测DD叩根叩叩Dref toolOmin pathDD成叩样D叩叩工叩叩

"sanity—check—resistance -detail—path—file reftool—min—path.rpt -path—limit 10 -layer—sample—limi t 10 -error—tolerance—threshold 0.2 -output—report out.rpt" 

-detail—path—file

:DD ref tool □□D min path report叩DDD叩DDD O D叩旧伲D layer 叩 叩 space 叩width 叩 density叩 golden res叩DD hvpDD叩h vp叩D引伲叩DDD hvpD res叩 DD D golden res D diff叩

-path—limit: D ref toolDD旧伲D少叩min path叩default D 10

-layer—sample—limit : D ref toolDD layerD旧伲DDDD叩default D 10

-error—tolerance—threshould : D D  hvp res D  golden resD diff tolerance叩叩叩范叩 

-output—report: DD输叩DO 

DB00DD经叩□叩

DD叩DDDDBODDDDDODD□叩叩

ref tool run RC check

DDDrun ref toolOresistance analysis□□D田田田D□D田DinstanceOeff/min resistanceD叩田田田D得DDDinstanceOeff/minODDD  

```

"perform res—calc -thread 8 -loopmode -instFile  fileName -o ./adsRpt/effective—res.rpt"

	// DDD fileNameDDD叩DDDD instance name(DD叩DD instance name)

叩D叩DD□DD instD eff resDDDDDDO叩effective—res.rpt叩

"perform min—res—path -instFile instFileName -simplified—report -o ./adsRpt/min—path—res.rpt "

   //DDD instFileNameDDD叩DDDD instance name(DD叩DD instance name)

叩D叩DD□DD instD min path DDDDDDO叩min—path—res.rpt叩叩 

```

Dwukong runDDDcase

DD designDDD 

/reg/wukong/wukong u七 -b {binary} -d {case pa七h} -q {queue} -k  DODD

	1.DDinpu七DDDDDDgoldenDDD

	2.DDDDDD七es七.七cl

[[Chip_RC_Correlation]]

切□designODD 

```

partition—top—design -colu 3 -row 3 -verbose

	//DDD叩D□ top  designOO 3x3DD叩00D□叩叩DD 叩  .hvp—partition—data  DO0叩D  partition—top—design -region {left—bottom—x left—bottom—y right—top—x right—top—y}

	partition—top—design -region {0 20.0 100.0 200.0}

```

[[Probe_Node]]

叩叩叩叩DDDDDDD Probe NodeDD叩叩叩叩 

1. DDDD probe node

add—pg—probe—node -net VDD -layer "metal1" -name test—node -location {100 200} 

analy江e—pg—resistance -net VDD -virtual—mode

2. 叩DOD叩DDDD probe nodes

add—pg—probe—node -probe—file probe—file.csv 

analy江e—pg—resistance -net VDD -virtual—mode DODDD叩D 

髻net—name metal—name x   y  current

|||||

|--|--|--|--|

|VDD|metal1|100|200|0.1|

|VDD|metal1|300|400|0.01|

叩static ir叩DDDDDDD Probe NodeDD叩叩叩叩 

3. DDDD probe node

add—pg—probe—node -net VDD -layer "metal1" -name test—node -location {100 200} 

analy江e—static—ir—drop -virtual—mode

4. 叩DOD叩DDDD probe nodes

add—pg—probe—node -probe—file probe—file.csv analy江e—static—ir—drop -virtual—mode

DODDD叩D 

髻net—name metal—name x		y	current VDD	metal1	100	200 0.1

VDD	metal1	300	400  0.01

...

## Debug resistance SOP:

### debug min path resistance:

### debug eff resistance:

eff叩叩叩0DD SOP叩叩版叩 

```

	1.□叩by-layer res scatter DD叩D叩叩DD叩D叩DDDDDDDDD叩D metalD叩 

	compare—detail—path—resistance  -input—file  rh—golden—detail—paht.rpt

	2.D叩D叩DD metal DDD伲metalD diffDDD instance叩

	3.叩hvpD rh叩别门叩伲instanceDDD伲叩叩叩D path叩(rhD叩直伲grep report file)

□DD golden rhD伲叩D0叩hvpDDDD叩D叩debug—pg—resistance

	4.2 D0D叩0叩叩00 

□DDD叩metalD叩叩DD叩叩邻DDDD叩叩0叩D0D叩叩0叩D叩report—pg—rc   门D叩rh伲叩DD叩叩叩hvpDD叩DDD叩 

```

### debug resistance report:

1. set—app—var node—reduction—effort -1  //D叩node reduction防叩干叩叩叩 

## DBDDDD :

3. set_site:

 叩tech fileD叩DD叩set—siteDDDD MACRO,叩O D heightDDDDD default cell height

3. DDDOregression:

  vp—regression -d -r {ut—run/}case伲 叩	//唯D叩 叩	ut—run伲叩D需叩 

 叩wukongDDO case

	/reg/wukong/wukong ut -b {binary} -d {case path} -q {queue} -k 

3.ODprofile0叩:

<pre>

	vi Makefile.hvp

	FXPORTFD—DFFrNFS:=-D—B·rl.D—VP=1 -D—FMrR—PROFrl.F=1

	叩叩DO叩ODODD  PROFrl.FR()

</pre>

4. compose_top_designDD 

```

	D   D叩D   emirTcl·tilityFlow.tcl

	assemble—physical—top—design

```

5. 产加rlcDDDD 

!58F3D26l-84F2-4l40-ABlF-A8F2F8B3FB49!

本叩□□明D rlcDO 

	RCGFN -no—auto—enc□叩明D rlc DDDD叩D叩D叩D叩□□ viaD rlc

	lp—test dump—rlc—via -rlc—model <model—name> -layer <vial.ayerName>

	*list—rlc—model*  显伲hvp rlc信叩 

6. 产加OT techDDDD 

D itf□□ techDO 

	rhtech -i itf.name D ircx□□ techDO 

	ircx2tech -i ircx.name

7.  OTAKU local run DD□D 

叩田地叩:       /home/ljxie/emir_tools/check_sum.csh

1.且DD己Orun dataDD(

![](clipboard-202503292057-lwibi.png)

)

2.0 行叩田

![](clipboard-202503292058-3s5ei.png)

3. 叩Dhtml main branchDDD localODDD叩叩田叩叩加DDDDD叩加DD再叩DDD田

![](clipboard-202503292058-cpoux.png)

![](clipboard-202503292058-zwrzb.png)

出叩graph edgeDDDDD SOP:

1.check input D入D田叩DDDD 

2.田D版田田叩DDDD 

3.node reduction -1;

4.debug_pg_resistance -location {x1 y1}; // report 田Dnode DDOpgraphD田0叩D 5.set_power_network_mode -area {x1 y1 x2 y2} //甩叩田D叩D□D区叩