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 : Advanced Micro Devices - Moderated (AMD) -- Ignore unavailable to you. Want to Upgrade?

To: semiconeng who wrote (66646)12/30/2001 5:57:42 PM
From: Bill JacksonRespond to of 275872
 
Semi, That would mean all the process waste streams could never take part in any recycling if copper traces are that dangerous.
I am not sure how much recycling of assorted elements is done, but in the copper process there are numerous tiny bits of copper made during the scrape down part and any small bits getting back to wafer station 1, will wreck it.

Well, copper is ductile and that may also mean it diffuses rapidly.

Thanks for the comments.

Bill



To: semiconeng who wrote (66646)1/2/2002 7:50:52 PM
From: TimFRead Replies (2) | Respond to of 275872
 
I heard someone did a test, where they placed a penny on the top surface of an Si Wafer, and they were able to detect Cu particles on the Back surface.

What would make that particularly interesting is the fact that a penny is only 2.5% copper. They are mostly zinc. Maybe it was an old penny.

Tim


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