SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Technology Stocks : Cymer (CYMI)
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: FJB who wrote (12617)1/15/1998 1:28:00 AM
From: James Word  Read Replies (1) of 25960
 
Rober RE: 64Meg DRAM and DUV.

"Without a true 0.25um process, the die size of a 64Mb is around 200mmø. "

That's 2 die per stepper field. Not bad, but if the 0.25um shrink
scales area by 50%, then you'd get 100mm2 area and 4 die per field.
That's an incentive.

"What are the flaws with this simplistic analysis James?"
It's probably essentially true. 1 DRAM generation is equal to 1 process shrink, so if 16Meg was 0.35um then 64Meg should be 0.25um.

I think that the only catch is that within each generation of
memory density lies around 3 different shrinks. For instance
a first generation 64Meg may start at 0.30um, 2nd generation 64Meg
may shrink to 0.25um while 3rd generation 64Meg might be 0.22um.
I'm not a DRAM expert but I think that's correct.

Don't forget that DRAM manufacturers are the ones pushing i-line
below 0.35um down to 0.25um with Phase Shift Masks and Off Axis Illumination, and, alas, no Cymer laser.

James Word
Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2025 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News