Embedded Systems Conference
Breaking News
Comments
Newest First | Oldest First | Threaded View
krisi
User Rank
Author
re: Globalfoundries claims 250,000 HKMG wafers shipped
krisi   4/3/2012 10:20:16 PM
NO RATINGS
I am afraid all these yield calculations are very rough guesses at best and can't be used for any analysis...Kris

ruserious
User Rank
Author
re: Globalfoundries claims 250,000 HKMG wafers shipped
ruserious   3/26/2012 10:14:10 PM
NO RATINGS
The yield equation requires one to supply die area, defect density, and the magic "process complexity factor". You only have one of those three numbers. The yield model that is ultimately chosen will be the one that best correlates with measured yield.

SiliconAsia
User Rank
Author
re: Globalfoundries claims 250,000 HKMG wafers shipped
SiliconAsia   3/23/2012 10:16:50 PM
NO RATINGS
80% yield means 250,000*226*80% = 53M units. first of all, the dies size of 263mm2 could not have 80% according to bose-einstein yeild/defect density equation for 32nm. Second of all, AMD is only shipping 1M-1.5M units of Llano per month. So if the yield is so good as 80%, GF won't ship that many wafers. AMD only needs 5-10,000 w per month. 10,000*263*80% = 2M.

Oscar Law
User Rank
Author
re: Globalfoundries claims 250,000 HKMG wafers shipped
Oscar Law   3/23/2012 5:53:15 PM
NO RATINGS
80% yield may be referred to wafer yield but not the parametric yield. The difference is more than 20% based on the product roll-out. Actually, TSMC has learned how to do a good job for 28nm process to ensure that the products goes for volume production within short period of time.

Adele.Hars
User Rank
Author
re: Globalfoundries claims 250,000 HKMG wafers shipped
Adele.Hars   3/22/2012 7:34:44 PM
NO RATINGS
Actually, GF said yields for 32nm SOI are now over 80%, and they're beating TSMC. So SOI took a bad rap for low yields in the beginning -- but should we be asking if it was really the learning process for their version of HKMG that caused delays? Their 32nm HKMG SOI was a major technological achievement -- but being first out of the gate, did they not run into a wall of unrealistic expectations from the bean counters? Hmmm.

SiliconAsia
User Rank
Author
re: Globalfoundries claims 250,000 HKMG wafers shipped
SiliconAsia   3/22/2012 4:27:46 PM
NO RATINGS
Dylan, It's simple math why 250,000 wafers shipment is not such a rosy picture. In fact this is a bad picture for foundry. Here is why. The die size of Llano is around 228mm2 and you get 263 gross dies per 12" wafer. The total gross dies = 250,000*263 = 66M units. So how many Llano AMD shipped so far? Probably less than 10M + some in inventory. That mean the wafer yield on 32nm SOI process is really low 10-20%. This means GF is losing thousands of $ every wafer they shipped. This is exactly why AMD had to go to TSMC for 28/20nm. The yield on 32nm could go up eventually but it took too long for AMD to get the manufacturing going in volume and GF likely will repeat this scenario all over again for 28nm and 20nm and so on.... I would stay away from GF until they prove themselves that they can manage manufacturing repetability for advanced nodes.



Radio
NEXT UPCOMING BROADCAST
Why Connect a Car?
May 11, 1pm EDT Monday
Overview: Battle-hardened veterans of the electronics industry have heard of the “connected car” so often that they assume it’s a done deal. But do we really know what it takes to get a car connected and what its future entails? Join EE Times editor Junko Yoshida as she moderates a panel of movers and shakers in the connected car business. Executives from Cisco, Siemens and NXP will share ideas, plans and hopes for connected cars and their future. After the first 30 minutes of the radio show, our listeners will have the opportunity to ask questions via live online chat.
Top Comments of the Week
Flash Poll
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Special Video Section
LED lighting is an important feature in today’s and future ...
Active balancing of series connected battery stacks exists ...
After a four-year absence, Infineon returns to Mobile World ...
A laptop’s 65-watt adapter can be made 6 times smaller and ...
An industry network should have device and data security at ...
The LTC2975 is a four-channel PMBus Power System Manager ...
In this video, a new high speed CMOS output comparator ...
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...
TE Connectivity's clear-plastic, full-size model car shows ...
Why culture makes Linear Tech a winner.
Recently formed Architects of Modern Power consortium ...
Specially modified Corvette C7 Stingray responds to ex Indy ...