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
LATEST ARCHIVED BROADCAST
As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Like Us on Facebook
Special Video Section
The LTC®6363 is a low power, low noise, fully differential ...
Vincent Ching, applications engineer at Avago Technologies, ...
The LT®6375 is a unity-gain difference amplifier which ...
The LTC®4015 is a complete synchronous buck controller/ ...
10:35
The LTC®2983 measures a wide variety of temperature sensors ...
The LTC®3886 is a dual PolyPhase DC/DC synchronous ...
The LTC®2348-18 is an 18-bit, low noise 8-channel ...
The LT®3042 is a high performance low dropout linear ...
Chwan-Jye Foo (C.J Foo), product marketing manager for ...
The LT®3752/LT3752-1 are current mode PWM controllers ...
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 ...