Introducing 3M™ Backside Busbar Tape 4706

Product reduces need for silver paste, enabling lower costs

St. Paul, MN – 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 percent.


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: www.3M.com/Solar

Featured Product

The Solar Fastener Expert by Mudge Fasteners. Your Source for Solar Industry-Related Hardware

The Solar Fastener Expert by Mudge Fasteners. Your Source for Solar Industry-Related Hardware

3M™ Extreme Sealing Tape is a family of single coated, pressure sensitive adhesive tapes designed for difficult sealing applications. The backing on this tape is an ionomer film that is very tough yet flexible and abrasion resistant. The very soft and thick acrylic adhesive has excellent sealing properties and good outdoor durability. This single coated tape is designed to seal over an existing joint, seam, or penetration. The adhesive is designed to adhere well to the ionomer film so that overlapping tape joints can be made while maintaining a strong seal. 3M™ Extreme Sealing Tape - instant sealing that rolls on fast and looks good.