Metallisation paste producer Heraeus Photovoltaics has strengthened its IP patent portfolio in regards to lead-free products with the purchase of several patents held by Japanese company, Murata Manufacturing.
Heraeus has a number of in-house patents related to lead-free solar cell pastes and earlier this year added patents from Shoei Chemical to its portfolio under a co-ownership agreement.
Patents from Murata that have been acquired by Heraeus relate to glass compounds (glass frit) with specific material combinations based on tellurium oxide. The company also has patents related to tellurium oxide.
Dr. Weiming Zhang, senior vice president of research and development for Heraeus Photovoltaics said: “The patents we recently acquired from Murata are of strategic importance to our R&D activities to offer our customers high performance metallisation pastes that will immediately begin to add value to their products. They complement our existing patent portfolio including the Shoei patent families which we acquired earlier and which gives Heraeus a very strong position in the future market of lead-free paste.”
According to Heraeus, tellurium containing pastes have demonstrated improved electrical contact over non-tellurium-containing paste and are expected to be a major driver in the adoption of lead-free containing metallisation pastes in the future.
Murata’s patent families using Tellurium-Oxide include, WO2014050703, WO2014045900 and WO2014050704.