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March 2012

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Subject:
From:
Ahne Oosterhof <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Ahne Oosterhof <[log in to unmask]>
Date:
Mon, 12 Mar 2012 09:54:48 -0700
Content-Type:
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text/plain (79 lines)
Chisel now (cost?) and chisel later (rework).
Ahne

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Graham Collins
Sent: 12 March, 2012 9:02 AM
To: [log in to unmask]
Subject: Re: [TN] Assembling with conductive adhesive

So you are saying that cost and reliability aren't sufficiently compelling
reasons to not use it?

Obviously the industry niche has to be considered.  We do repair and
overhaul work on some gear that is a good 20 years old, not sure what the
heck we would do with something that had been assembled with a conductive
adhesive.  If you were building something low cost that is a "throwaway"
device then rework isn't a factor, but cost would be a factor.  Hence I
would consider this to be a niche product, some very specific requirements
would force the use of a conductive adhesive.

regards, 
  
Graham Collins
Halifax Production Engineering
L-3 communications Electronic Systems
(902) 873-2000 ext. 6215 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Monday, March 12, 2012 12:39 PM
To: [log in to unmask]
Subject: [TN] Assembling with conductive adhesive

Hey all,

 

Wish I hadn't lost that hour of sleep this weekend, I'll try to find it
tonight. :o)

 

Anyways, have any of you thought of trying to replace solder with a
conductive adhesive for PCB assembly? There's a few out there (Henkel,
Cookson, Ellsworth, etc.) that are touting them as solder replacements.

 

When I read the technical datasheets, I'm thinking to myself, why isn't this
stuff more widely used? There must be a reason. 

 

I do know it's pretty expensive almost all of them are silver filled, and I
have read that the mechanical strength and thermal conductivity is not as
good as solder, but what other reasons are out there not to use it?

 

Steve



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