Introducing 3M™ Backside Busbar Tape 4706

  Introducing 3M™ Backside Busbar Tape 4706

         Product reduces need for silver paste, enabling lower costs

Solar Power International 2013

Business Wire

ST. PAUL, Minn. -- October 21, 2013

3M Renewable Energy is debuting its latest innovative solution for the solar
industry at Solar Power International, October 21-24 in Chicago, Ill. The new
3M Backside Busbar Tape 4706 allows manufacturers to eliminate silver-based
backside busbars, enabling significant cost savings and protecting against the
volatility of silver prices. In addition to these benefits, this tape-based
solution has the potential to improve absolute efficiency by approximately 0.2

3M Backside Busbar Tape 4706 is a copper foil tape coated with a
high-performance heat-curable adhesive on one side. The tape can be bonded to
aluminum pastes commonly used on the back surface of crystalline solar cells,
and provide reliable, low-resistance electrical contact comparable to backside
silver busbars. Preliminary tests have shown stable long-term electrical
performance in damp heat and thermal cycling.

3M Backside Busbar Tape 4706 can be incorporated into existing manufacturing
processes with an automated tape bonder. The fast-curing thermoset adhesive
enables high productivity to match typical cell manufacturing processes. These
cells can be inter-connected using standard tabbing and stringing operations
in typical panel manufacturing.

3M representatives will be on site at booth number 426 at SPI to speak with
interested parties about how 3M Backside Busbar Tape 4706 can be incorporated
into their products.

For more information, please visit:

About 3M
3M captures the spark of new ideas and transforms them into thousands of
ingenious products. Our culture of creative collaboration inspires a
never-ending stream of powerful technologies that make life better. 3M is the
innovation company that never stops inventing. With $30 billion in sales, 3M
employs 88,000 people worldwide and has operations in more than 70 countries.
For more information, visit or follow @3MNews on Twitter.

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Karwoski & Courage Public Relations
Emily Wozniak, 612-342-9635
Colleen Harris, 651-733-1566
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