Can someone tell me about "downbond"?

[cying]

package downbond

Why is downbond used in some high resolution high speed data converter?
Someone told me it is relational with inductance caused by package?

I am fussy with the theory about this topic.

 

[DReynolds]

Cying, downbonds are when you bond from the die "down" to the paddle of the package. The paddle is the part of the package that the die sits on... this gives a much shorter wire which has a lower inductance. Extremely low gnd inductances can be achieved with and "exposed" paddle type package because the same piece of metal that the die sits on can be soldered down to the board. this also give excellent thermal performance!


hope this helps

David Reynolds

 

[cying]

DReynolds,thank you .
But can you give some detail explain about the "exposed" paddle type package?
I am a newer in package.