coin-cell battery footprint problem

[Kick]

hiii all,

In my circuit there is a coin-cell battery and I placed bottom side of the board,some vias also present in the battery footprint area.My doubt is when i m inserting battery in battery holder will it contact with vias and circuit become short???

 

[cl10greg]

It depends on how the board was made. Some vias are tented (covered with mask) that protects them from being contacted and encapsulates them. I would check if this was the case. You could also do a continuity check on the via if you have access to it.

 

[Kick]

ok...thanks for your information.

 

[marce]

You cannot rely on solder mask as an insulator, if anything goes wrong you could be liable, if this is a commercial product. if it is for yourself you have to think of the possible downsides a short may cause.
Even if it does insulate initially, the resist can be easily worn of pads, either design it so there will be no shorts or use a proper insulating material.

 

[andre_luis]

when i m inserting battery in battery holder will it contact with vias and circuit become short???

I can´t see how this could happen if you use a standard holder like that.
Note the bottom surface insulates completely the battery from PCB board.

 

[Kick]

I am using SMD type battery holder.

 

[techgreed]

Dear Kick,
From the picture, i hope the battery will be placed directly on the pcb and the holder will be fixed on top of it. Is that right?
If so, the pcb will be having a pad of the size of the battery for the negative terminal. Then how can you have any other vias in that area??

 

[Kick]

yup..u r right..in my board there is 10mm dia pad for -ve terminal.But i saw same battery bolder in another circuit,they used small size pad for -ve terminal and also i saw vias around that pad.

- - - Updated - - -

In this pic u can see vias around -ve terminal

 

[techgreed]

Tented vias provides insulation.But still this is 'very risky, as i see.

 

[Kick]

let see...i want to search more about this.