Tell them that Vlad the Impaler said it, therefore it must be so.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Hfjord
Sent: Thursday, September 06, 2007 2:52 PM
To: [log in to unmask]
Subject: [TN] SV: [TN] Semi guys, need support
Dear Vlad,
First image is 0.5 kV, next 2.0 kV, then 5 kV and finally 20 kV.
The numerous small grains and the pores are not normal for semi metallization. The spectra is collected from areas with these protrusions or grains. Compared with normal chips, no F present. The spectrometer has no False F peaks. The only such peak is a very small Si peak, which is common For many EDAX's. There IS Fluorine!
I got a message from Leo Higgins, his comment tells me he knows about semi processes, which I do myself. I've done analysis for TI, MOTA, NG, XILINX and some more, and I've seen a lot, especially from MESFETs and HBTs, but these chips are little of a mystery because of the extremely bad wire bondability. The problem is of course not to find in the epitaxial processes, but in the metallisation chain. The fluorine problems used to be found in the early time of semiconductors, and was well known, but I have not seen that failure category for years and years. Maybe something happen when this US company moved production to...erh..other countries.
Contaminated rinse water or contaminated vacuum/sputter equipments may also be a source (very unusual with serious manufacturers).
Auger, yep, we have the machine not far away. FIB or TOFSIMS may also be of interest.
The production of laser equipments is stopped because of these dirty little creeps. They hoped I would give them good news, but I can't accept the quality of these chips. If they ask for reference, I'll say a lion told me.
Inge
-----Ursprungligt meddelande-----
Från: TechNet [mailto:[log in to unmask]] För Igoshev, Vladimir
Skickat: den 6 september 2007 18:57
Till: [log in to unmask]
Ämne: Re: [TN] Semi guys, need support
Inge,
I don't see any 1kV images and don't quite understand what you mean by referring to a "strange superficial structure".
Another point is the presence of F. The fact that the software shows it DOES NOT mean it's there (and the actual spectrum you provided doesn't tell it's there).
Regards,
Vladimir
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Hernefjord Ingemar
Sent: Thursday, September 06, 2007 10:01 AM
To: [log in to unmask]
Subject: [TN] Semi guys, need support
25 micron gold ball bonding bad yield, ball lifts, poor adhesion on Al pads. Triple diff line tranceiver chip. Weird micrographic exteriour, EDAX gives C,F,O, Cl,Cu,Al,Fe. Cu can be ppm alloy but the others unwanted on semi chip bond pads I think. 1kV SEI SEM reveals strange superficial structure. Chip not contaminated by us, fresh opened chip trays show this face. Question: what semi manufacturing problem can this be? Will post a few pics to Steve's gallery.
TrikeMan?
/Inge
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