Tanaka 1st, Heraeus 2nd and MKE  3rd... it depends who you prior  
supply is... the 1st two may have wider process window, the 3rd is  
cheaper, but it might have narrow process window (talk to your  
workers, they know what I am talking about...  it also depend upon  
your machine tolerance, if you have newer bonder, you might not see  
that much difference - good transducer... if you are high volume  
producer (in terms of number  of wire bonds per shift... and high   
number of wire per unit), you want to pay a bit more just  ensure no  
rework... (if  you deal with 450-1000 wire bonds per unit, you don't  
want  to save a bit on wire... the down time  and rework will kill  
your SPC and for extra time to maintain the tooling)...IMHO.  (by the  
way, if you are mil house, you might not allow to use Jap product due  
to WWII restriction... not sure if it lifted or not... very silly).
On Feb 15, 2018, at 10:35 AM, Tempea, Ioan wrote:

> Dear Technos,
>
> I've run into some delivery schedule shenanigans with our supplier  
> of Au ribbon (0.001"x0.003") for wedge bonding.
>
> Which manufacturers of this material would you recommend?
>
> Thanks,
>
> Ioan Tempea