Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

vdd , gnd power line layout

Status
Not open for further replies.

EHY

Member level 1
Joined
Apr 2, 2015
Messages
36
Helped
0
Reputation
0
Reaction score
0
Trophy points
6
Activity points
235
1) vdd, gnd power line : using upper(M6, Top metal) metal layer


2) vdd, gnd power line : using M1 M2(lower) metal layer



which one is correct??
 

erikl

Super Moderator
Staff member
Joined
Sep 9, 2008
Messages
8,112
Helped
2,694
Reputation
5,368
Reaction score
2,293
Trophy points
1,393
Location
Germany
Activity points
44,063
I'd advice to use the top metal layer (wherever possible): in most processes this is a thicker layer, so has less resistance.
 

AMS012

Full Member level 3
Joined
Oct 29, 2012
Messages
187
Helped
42
Reputation
84
Reaction score
43
Trophy points
1,308
Location
India
Activity points
2,368
It mainly depends on your application. If you are doing a standard cell layout that sits in another block, it is better to use lower metals and preserve higher metals for other blocks routing.
If you are laying out a single block and are sure that there is no top metal blockage, then it is good to go for higher metals for lower resistance.

A good layout should contain all the metal layers in a uniform density, which will avoid 'dummy metal filling' later.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top