Continue to Site

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.

Register Log in

Explanation of annular ring in PCB layout

Status
Not open for further replies.
R

raj_pcbtech

Member level 3
Member level 3
Joined
Aug 9, 2007
Messages
61
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Location
India
Visit site
Activity points
1,617
Hi All,

Could anyone please explain me about annular ring in PCB layout?

Thanks in advance.

Raj
 

Annular Ring

AR = (padsize - drillsize) /2.

The amount of copper left as a pad after you drill a hole in it.

Remember when talking about plated holes you also have a drilled hole size that is a bit bigger than your finished plated hole size that was specified.

you need to find this out from your pcb manufacturer what it is & what the AR requirements are.

If the annular ring is too small then your board will likely get rejected as it causes manufacturing problems.
 

Re: Annular Ring

Can anyone tell me wot is annular ring
a) it is the copper platting deposited after drilling, means copper inside the drill.
b) it is the copper outside the drill.
Thanks in advance, please mail me at kumm@hotmail.com
 

Annular Ring

The above definition and diagram are explained cleanly.

It is the copper pad outside the drill to get a connectivity from the routed traces.

The Min. annular ring size is to be 6 mils.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top