Burn In

[TonyTecson]

semiconductor processes are an exact science, nothing is left to chance as everything is by design and strictly controlled and documented at that...
the process designers target a certain performance specs....

burning in semicon devices after assembly and encapsulation, so that marginally soldered dies, marginally wire bond contacts and yes, any other defects that may cause the device to fail in the field are uncovered in the process of burn-in testing...

and only those that have undergone burning in using the temp cycle process and have afterwards passed the parametric testing gets to go to final marking and packing and shipping.....

this is the burn in that i know about, not the burning in that audiophiles swear by with their anecdotes....

 

[TonyTecson]

audiophile gears do not burn in, they die a little with each day of use, so that in time, you have to go out and buy a new one....this is my honest opinion...

 

[scott wurcer]

As not to be seen to be rude, its probably polite to answer the query about doping, 'probably' the semiconductor settles/decays during burn in.

As DF96's says it would be good to review the basic texts on the matter. Diffusivity is usually plotted around temperatures of 1000C and is a very strong function of temperature becoming infinitesimal at normal temperatures, that is 7 or more orders of magnitude less.

 

[poynton]

Is it not time to close this thread ????


It's going nowhere and no new ground is being covered.


Andy

 

[jan.didden]

As not to be seen to be rude, its probably polite to answer the query about doping, 'probably' the semiconductor settles/decays during burn in, meaning that different semiconductors will exhibit different behaviors depending on the process of doping, studying this phenomenon may require an emf monitor that can take magnetic field, electric field and radio wave measurements from probably 20Hz to 8GHz

Well Doug, anecdotes are not enough apparently. Now fantasies enter the arena.

Jan

 

[Galu]

It's going nowhere and no new ground is being covered.

As I said before, this thread has entertainment value only!

 

[NATDBERG]

I guess some people have different ideas about what is entertaining..

 

[scottjoplin]

Thank God

 

[Galu]

Guess who is being most entertained!

 

[DPH]

As not to be seen to be rude, its probably polite to answer the query about doping, 'probably' the semiconductor settles/decays during burn in, meaning that different semiconductors will exhibit different behaviors depending on the process of doping, studying this phenomenon may require an emf monitor that can take magnetic field, electric field and radio wave measurements from probably 20Hz to 8GHz

As DF96's says it would be good to review the basic texts on the matter. Diffusivity is usually plotted around temperatures of 1000C and is a very strong function of temperature becoming infinitesimal at normal temperatures, that is 7 or more orders of magnitude less.

^ to augment: http://www-inst.eecs.berkeley.edu/~ee143/sp06/lectures/Lec_10.pdf

Page 3; notice the log diffusivity versus linear temperature plot.

You'll have better success suggesting that burn in rewets solder joints or affects silicide metallization processes than it affecting diffusion of dopants in terms of relative magnitude. In absolute magnitude, if you're affecting the IC's themselves with a "burn in" then something went very very very wrong and either the part is already defective or has recently let the magic smoke out.