Silicon Investor (SI) -- The First Internet Community

STOCKTALK

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.

Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: Saturn V who wrote (82708)	12/12/1999 6:50:00 AM
From: Bill Jackson	Respond to of 1572778

SaturnV, I expected sodium to act funny and I was just musing that it may act as an etch enhancer in selective areas. From what you say it is to be avoided at all costs. My thought were that as they lay down the layers where they want the notch...how do they make the material where they want the notch weaker to etch faster or to make the area above it tougher and more etch resistant. I do recall some times when they would get undercutting in areas so this could be that type of effect, managed. As to the risks of the notch and having fewer good dice from bad notches...that would be an acceptable tradeoff for speed since the smaller feature size allows more to be made to offset those losses. Maybe there are large losses and that is why the ship rate is low. when they get better control of the notches and up the yield that will go away. will the notches introduce a long term reliability problem as it will be a hidh stressed layer in volts/meter and there could be problems over time? Bill