http://greenstockscentral.com/obama-touts-arc-energy-which-could-help-slash-led-lighting-costs-2762.html Green Alternative Energy Stocks - Solar, Wind, LED Lighting,Smart Grid, Electric/Hybrid Cars, Wave Energy, Green Building, Biofuels & Geothermal Tue, 15 May 2012 18:53:38 +0000 hourly 1 http://wordpress.org/?v=3.3.1 http://greenstockscentral.com/obama-touts-arc-energy-which-could-help-slash-led-lighting-costs-2762.html/comment-page-1#comment-3421 Dr. Rick Schwerdtfeger Mon, 08 Feb 2010 18:55:42 +0000 http://greenstockscentral.com/obama-touts-arc-energy-which-could-help-slash-led-lighting-costs-2762.html#comment-3421 Dr. Deak, Thank you for the well wishes. While you are technically correct about the thermal conductivity, we all know that one property does not a success story make. The main reason people have done research in silicon as a substrate is because of the high cost of large diameter sapphire. There is great semiconductor processing equipment available for 6" and greater wafers, but traditional methods of making sapphire are not cost effective to make these sizes. ARC Energy believes we can be an industry enabler to bring the LED industry into the 6"-8" semiconductor-scale era, thus eliminating the need for continued difficult development efforts of GaN on silicon. Thanks again, Dr. Rick Schwerdtfeger CTO ARC Energy Dr. Deak,
Thank you for the well wishes. While you are technically correct about the thermal conductivity, we all know that one property does not a success story make. The main reason people have done research in silicon as a substrate is because of the high cost of large diameter sapphire. There is great semiconductor processing equipment available for 6″ and greater wafers, but traditional methods of making sapphire are not cost effective to make these sizes. ARC Energy believes we can be an industry enabler to bring the LED industry into the 6″-8″ semiconductor-scale era, thus eliminating the need for continued difficult development efforts of GaN on silicon.
Thanks again,
Dr. Rick Schwerdtfeger
CTO
ARC Energy

]]> http://greenstockscentral.com/obama-touts-arc-energy-which-could-help-slash-led-lighting-costs-2762.html/comment-page-1#comment-3412 Dr. David Deak Thu, 04 Feb 2010 18:19:13 +0000 http://greenstockscentral.com/obama-touts-arc-energy-which-could-help-slash-led-lighting-costs-2762.html#comment-3412 ARC in their efforts for trying to develop cheaper sapphire LED substrates, is courageous but not in line with the focus of the LED die industry, which is to use silicon as a substrate. By definition silicon is cheaper than sapphire and a better thermal conductor as well. However I wish them success. ARC in their efforts for trying to develop cheaper sapphire LED substrates, is courageous but not in line with the focus of the LED die industry, which is to use silicon as a substrate. By definition silicon is cheaper than sapphire and a better thermal conductor as well. However I wish them success.

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