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Gold/Mining/Energy : Silver prices -- Ignore unavailable to you. Want to Upgrade?

To: Bob Tate who wrote (949)	3/30/1998 4:01:00 AM
From: Sleeperz	Respond to of 8010

I guess some people did not read the article properly and it ended up transformed from one post to the next. In the manufacturing of millions of PCBs each day, large quantities of FILM which uses silver, is used in the manufacturing process. Now with the direct etch process this film exposure process is not needed saving time and money in the manufacturing of PCBs. cl >>>To my knowledge digital and analog PCBs use copper, lead and small quantity of gold for contacts plating. ICS that make board components are made of copper, lead, silicon and plastics. Where is a silver?<<<

To: Bob Tate who wrote (949)	3/30/1998 7:23:00 AM
From: Aurum	Read Replies (2) \| Respond to of 8010

Bob, apart from the use of silver as a connector coating, I don't know where the silver comes from. Some military specification co-axial cable had silver plated wire shielding. I did a lot of recovery from PCBs a few years ago and on average the PCBs contained 2 Kg silver per tonne (ie, 2,000 ppm). These boards were 10-20 years old. They also contained quite a bit of palladium, traces of platinum and rhodium. I suspect that a lot of electronic bits and pieces (and semi-conductors) contain platinoids, but the use is a proprietary secret. In 1990 rhodium skyrocketed to US$7,500 an ounce - somebody was caught short and had to buy up all available rhodium - I presumed it was a semi-conductor maker.