John,

when you say 'substrate', what do you then mean? Ceramic single layer or thickfilm multilayer or LTCC or HTCC or organic substrate or semiconductor ? And what bonding? Wedge or ball? And what conductor material? Gold or Gold/Palladium or Gold/Silver..there are many. And do you mean manual bonding or automatic bonding. And do you mean high speed bonding or low speed bonding? In some cases, the 'substrate' can be bonded after 25 years (we have tested).

Trikeman will probably climb the scen and give a 5 minute lesson in the art of bonding.

Inge

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of John Burke
Sent: tisdag 16 mars 2010 18:15
To: [log in to unmask]
Subject: [TN] Substrate life for BGA substrates

Hi Technet team,
 
I have some substrates which the vendor has in inventory. The vendor normally calls "life" on these at 12 months from receipt.
 
In your experience what is the useable life of a substrate for wire bonding (gold wire) where the substrates are still useable without any undue reliability issues?
 
Substrates are sealed and kept at 20 Centigrade.
 
Answers appreciated.
 
John
 
 

 


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