Why gold is used in chips and wires?

[ahmed osama]

Golden chip

Do chips sometime have gold inside it ??

if yes !! so why??

thanks
bye

 

[ninge]

Re: Golden chip

Hey As per my understanding no gold inside the chip but gold wires are used in bonding as well as the I/O pins will be coated with gold or gold only in some special devices....the main reason is copper is more susceptible to corrosion than gold.
I hope that my answer make sense.

 

[protonixs]

Re: Golden chip

gold wires are used in bonding the pads of the wafer to the external world (IC pin).
it must be at least 99.9999 percent pure. (please note the 4 nines in the decimal place)

 

[ahmed osama]

Re: Golden chip

gold wires are used in bonding the pads of the wafer to the external world (IC pin).
it must be at least 99.9999 percent pure. (please note the 4 nines in the decimal place)

why gold has been used for the wires?

 

[protonixs]

Re: Golden chip

gold wires are used in bonding the pads of the wafer to the external world (IC pin).
it must be at least 99.9999 percent pure. (please note the 4 nines in the decimal place)

why gold has been used for the wires?

Gold: Gold is used because it is normally inert, is well-suited to the ball bonding process, and demonstrates excellent loop formation and cycle performance. However, in a high heat situation, gold presents problems because it tends to absorb the radiated energy, making it unstable. (This can be a significant problem in aerospace applications.) Gold wire can be stabilized with several different dopants including beryllium and calcium, as well as proprietary materials. Gold wires for ball bonding are normally supplied in the annealed condition to prevent unwanted "break-off" partial annealing that will occur during initial ball formation. The reliability and flexibility of gold wire bonding have made it the most widely used technology in the IC industry.

-----excerpt fr ADVANCE PACKAGING

i hope i was able to answer your question.

 

[milkdragon]

Re: Golden chip

Actually gold is used for metal interconnect in GaAs

 

[lladnar23]

Golden chip

Also sometimes they dope semiconductor with gold to provide recombination sites to spoil the carrier lifetime - that results in a fast response, but also gives a more leaky semiconductor.