Breaking News
Comments
Newest First | Oldest First | Threaded View
<<   <   Page 2 / 3   >   >>
rick merritt
User Rank
Author
Re: Intel eDRAM vs IBM
rick merritt   8/8/2014 5:38:45 PM
NO RATINGS
@AD2010: Yes, someone told me recently Intel had the early eDRAM patents but IBM was the first to really make use of the technology in a big way, perhaps licensing itsa rival's technology.

Is IBM's trench approach tied to its use of SOI?

AD2010
User Rank
Blogger
Intel eDRAM vs IBM
AD2010   8/8/2014 4:33:44 PM
NO RATINGS
hello all,

sorry for the delay, I was in vacation when the article got posted.

Here are my comments, some of them are already answered; Answering multiple comments.

1/IBM eDRAM is there from quite some time not sure if it is a decade old... IBM was a pioneer in eDRAM.

IBM latest eDRAM is 45 nm on SOI with trench technology,  while Intel eDRAM is with FinFETS and is using 22 nm technology and is based on MIM technology.

 

Intel has very old patents on eDRAM, so most likely it had this technology in their R&D sections.

It is more difficult to shrink trench technolgy. So Intel has an advantage over IBM.

 

2/ YES, Intel used 8T SRAM and will probably continue to use SRAMs along with eDRAMs but eDRAMS will take the major load as they occupy less space. Our structral anlysis reports show that Intel has used several types of SRAM but all of them take more space than eDRAM. eDRAM is a real estate saviour which is critical for future nodes.

 

We have not analyzed the eDRAM characteristics yet so cannot comment about the refresh times, the information providedin the article is taken from Intel's presentations in conferences.

 

3/ MRAM could be a potential  candidate but it is still not manufacturable ready in terms of cost effectiveness and memory size.

AD2010
User Rank
Blogger
Intel eDRAM vs IBM
AD2010   8/8/2014 4:33:32 PM
NO RATINGS
hello all,

sorry for the delay, I was in vacation when the article got posted.

Here are my comments, some of them are already answered; Answering multiple comments.

1/IBM eDRAM is there from quite some time not sure if it is a decade old... IBM was a pioneer in eDRAM.

IBM latest eDRAM is 45 nm on SOI with trench technology,  while Intel eDRAM is with FinFETS and is using 22 nm technology and is based on MIM technology.

 

Intel has very old patents on eDRAM, so most likely it had this technology in their R&D sections.

It is more difficult to shrink trench technolgy. So Intel has an advantage over IBM.

 

2/ YES, Intel used 8T SRAM and will probably continue to use SRAMs along with eDRAMs but eDRAMS will take the major load as they occupy less space. Our structral anlysis reports show that Intel has used several types of SRAM but all of them take more space than eDRAM. eDRAM is a real estate saviour which is critical for future nodes.

 

We have not analyzed the eDRAM characteristics yet so cannot comment about the refresh times, the information providedin the article is taken from Intel's presentations in conferences.

 

3/ MRAM could be a potential  candidate but it is still not manufacturable ready in terms of cost effectiveness and memory size.

ssliva
User Rank
Freelancer
Re: on chip eDRAM at IBM
ssliva   8/8/2014 1:24:56 PM
NO RATINGS
Intel eDRAM is MIM, not trench like IBM's.  Potentially changes the logic process's metal stack if they try to integrate it on the processor chip.  Though perhaps not.

ssliva
User Rank
Freelancer
Re: on chip eDRAM at IBM
ssliva   8/8/2014 1:21:25 PM
NO RATINGS
Not exactly true.  The logic-process compatible eDRAM is old, but POWER4, POWER5 and POWER6 used huge MCMs where the processors were SOI and in the MCM were large L3 cache chips using a bulk logic process with eDRAM.  POWER6's discrete eDRAM L3 might've switched to SOI, and that presaged the switch to a single POWER7 chip with eDRAM on the processor die.  POWER7 launched in 2010, so not really a decade for on-processor eDRAM, though they did have the trench-eDRAM with SOI tech to do it a bit sooner.

resistion
User Rank
CEO
Re: Intel's eDRAM
resistion   8/8/2014 1:17:45 PM
NO RATINGS
My MRAM colleagues may hope to replace DRAM with MRAM but we should keep our minds open.

aarunaku
User Rank
Rookie
Re: on chip eDRAM at IBM
aarunaku   8/8/2014 1:10:17 PM
NO RATINGS
@ Viollencelles,

You are absolutely right. I wonder what is different about Intel's version of eDRAM vs. IBM. Is it SOI vs. Bulk?

resistion
User Rank
CEO
Re: Intel's eDRAM
resistion   8/8/2014 1:00:17 PM
NO RATINGS
I know they were starting to use 8T SRAM, that was a sign of problems for 6T. I assume the refresh controller will only refresh cells containing data. These could be sparse.

Violoncelles
User Rank
Rookie
on chip eDRAM at IBM
Violoncelles   8/8/2014 3:03:24 AM
NO RATINGS
IBM has been using on chip eDRAM on its chips for more than a decade .

resistion
User Rank
CEO
Re: Intel's eDRAM
resistion   8/8/2014 2:23:41 AM
NO RATINGS
IIRC, refresh rate is lower for eDRAM, but not 0.

<<   <   Page 2 / 3   >   >>


EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

Feast Your Orbs on My Jiggly Exercise Machine
Max Maxfield
46 comments
Last weekend, I was chatting with my mother on the phone. She's all excited that I'm coming over to visit for a week in November. "I'll be seeing you in only seven weeks," she trilled ...

Glen Chenier

Missing Datasheet Details Can Cause Problems
Glen Chenier
3 comments
It is often said that "the devil is in the details." All too often those details are hidden deep within a datasheet, where you can easily overlook them. When a datasheet reference circuit ...

David Blaza

RadioShack: The End Is Nigh!
David Blaza
120 comments
I'm feeling a little nostalgic today as I read about what looks like the imminent demise of RadioShack, at least as we currently know it. An old ubiquitous cartoon image popped into my ...

Larry Desjardin

Engineers Should Study Finance: 5 Reasons Why
Larry Desjardin
46 comments
I'm a big proponent of engineers learning financial basics. Why? Because engineers are making decisions all the time, in multiple ways. Having a good financial understanding guides these ...

Flash Poll
Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)