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.

Thermal relief spoke width

Status
Not open for further replies.

difflvl

Advanced Member level 4
Joined
Jun 14, 2006
Messages
110
Helped
12
Reputation
24
Reaction score
2
Trophy points
1,298
Activity points
1,987
Hi,

For a thermal relief to a ground plane, would a small spoke width of .1mm constitute a bad ground connection? What is the recommended standard?

Altium designer defaults to .254mm, but when I look at the boards that I got fab-ed they look more like .1mm, very thin. Coincidentally im having some compatibility problems with that board from one platform to another. Is it likely that its the poor spoke width?

Thanks
 

s.venkatesh

Newbie level 6
Joined
Jun 15, 2007
Messages
11
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,339
Hi,
For a thermal relief to a ground plane, The spoke width of 0.38mm(15 mils) constitute a better ground connection.

thanks
 

Rame

Full Member level 6
Joined
Dec 23, 2005
Messages
373
Helped
47
Reputation
94
Reaction score
7
Trophy points
1,298
Location
BANGALORE
Activity points
3,810
Hi,

In addition to that care should be taken to ensure that plane areas do not get isolated after thermal relief pads are placed and etched.i would say spoke thickness min 8 mil to max 15 mil is ideal depending upon the complexity of the board.


Regards

Ramesh
 

    difflvl

    Points: 2
    Helpful Answer Positive Rating

cyberrat

Advanced Member level 3
Joined
Jun 19, 2001
Messages
898
Helped
87
Reputation
174
Reaction score
41
Trophy points
1,308
Location
In the sewers of the U.K.
Activity points
5,825
Also take care not to completely unbalance the connections to a 2 terminal SMT component otherwise it may tombstone.
 

    difflvl

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top