Thanks Joyce,
That's how I see it too, keep it simple, with N2...
Cheers,
Ioan
-----Message d'origine-----
De : Yuan-chia Joyce Koo <[log in to unmask]>
Envoyé : mars 03, 2022 09:25
À : TechNet E-Mail Forum <[log in to unmask]>; Tempea, Ioan <[log in to unmask]>
Objet : Re: [TN] Dry air vs. Nitrogen purge
too many variables to consider - your chip layout, pad under structure, heat history of the assembly (direct chip attach? epoxy/ solder/preform?, baking, cleaning, etc.etc.), adjacent parts... if it is device, how many stack, MCM, wire bonder brand, vintage, table tear capability, etc.etc. you can go to rabbit holes to generalize without any benefit (I know few far east papers tell you many "theory", but strip down to variables, I would not take it seriously... even with DOE matrix)...
I would recommend you to do your own study - if you have Auger, SIMS, surface analysis equipment assess and cheap... otherwise, FIFO, or N2 or both. if I were you...(always cheap and more reliable). IMHO.
jk
On Mar 3, 2022, at 7:41 AM, Tempea, Ioan wrote:
> Thanks Joyce,
>
> Wire bonding it is, indeed. Sorry Bev, I should have mentioned this!
>
> And wire bonding is with Au wire, on Au and Al pads.
>
> Any N vs air theory or studies?
>
> Cheers,
>
> Ioan
>
> -----Message d'origine-----
> De : Yuan-chia Joyce Koo <[log in to unmask]> Envoyé : mars 02, 2022
> 16:37 À : TechNet E-Mail Forum <[log in to unmask]>; Tempea, Ioan
> <[log in to unmask]> Objet : Re: [TN] Dry air vs. Nitrogen purge
>
> if it is for wire bonding, dry air is not good enough. (unless you
> use it within 2-3 wks... you will see yield goes down... IMHO).
> On Mar 2, 2022, at 7:52 AM, Tempea, Ioan wrote:
>
>> Dear Technet,
>>
>> Obviously Nitrogen purged cabinets are the best thing to have for
>> storage of bare die and even packaged components.
>>
>> But do you have any experience showing that dry air purged cabinets,
>> properly controlled, are not up to the task?
>>
>> Thanks,
>>
>> Ioan Tempea
>>
>>
>> Les renseignements transmis par ou joints au pr?sent courrier ?
>> lectronique sont destin?s uniquement ? la personne ou ? l'entit? ?
>> laquelle ils sont adress?s. Le pr?sent courrier ?lectronique et toute
>> pi?ce jointe peuvent contenir des renseignements exclusifs,
>> confidentiels ou privil?gi?s. Si vous n'?tes pas le destinataire de
>> ce message, veuillez noter que toute utilisation, r?vision,
>> retransmission, distribution, reproduction ou toute action entreprise
>> sur la base de ce message est strictement interdite. Si vous avez
>> re?u ce message par erreur, veuillez communiquer avec l'exp?diteur et
>> supprimer le contenu de tous les ordinateurs.
>>
>> The information transmitted by and/or attached to this email is
>> intended only for the person or entity to which it is addressed.
>> This email and any attachments may contain proprietary, confidential
>> and/or privileged material. If you are not the intended recipient of
>> this message, be aware that any use, review, retransmission,
>> distribution, reproduction or any action taken in reliance upon this
>> message is strictly prohibited. If you received this in error, please
>> contact the sender and delete the material from all computers.
|
