Microbattery Patent Landscape
MICROBATTERIES IP DYNAMICS HERALDS A FUTURE RAMP-UP OF THE MARKET
Today, micro-sized batteries are only commercialized by few companies (PowerPaper, Cymbet, Infinite Power Solutions and ST Microelectronics) while Johnson Battery Technology, Front Edge Technology and I-TEN are evaluating their micro-battery prototypes and plan to commercialize them within two years. Currently, Microbattery market is small but it should grow up within the next years, from $7m in 2015 to more than $400m in 2026 according to several published market studies. New patent applicants from various industries are looking to this starting market (STMicroelectronics, Infineon, Applied Material, Ulvac). The recent mergers and acquisitions (Apple/Infinite Power Solutions, Dyson/SAKTI3) reflect a thriving sector in transformation. Today, the number of enforceable patents has reached a critical level worldwide, several companies stand out by their strong IP position, and the first patent litigations have recently appeared. In this emerging market, a strong intellectual property (IP) position is essential for companies to grow their micro-batteries business. It is crucial to understand the global patent landscape through in depth analyses, in order to anticipate changes, harvest business opportunities, mitigate risks and make strategic decisions to strengthen one’s market position and maximize return on one’s IP portfolio.
We have investigated the patent landscape of micro-batteries (micro-sized, solid thin film, flexible, 3D). More than 900 patented inventions related to micro-batteries have been published worldwide up to May 2016 by more than 300 patent applicants. The development in micro-battery field is intimately linked to batteries, microelectronics and nanomaterials fields. New battery technologies, electrodes and electrolytes materials developed for batteries in general could be adapted to micro-batteries. The first solid thin film battery was a lead battery patented in 1965 by Melpar (USA). Since 1980’s, patented microbatteries have been mainly lithium batteries. In early 1980’s, Hitachi/Hitachi-Maxell patented the first Lithium solid thin film batteries. They leaned on their knowledges and processes on batteries and thin film deposition. In 1992, Bates and his team at Oak Ridge National Laboratory (ORNL) patented the sputter-based, all solid state battery utilizing the electrolyte LiPON (US 5,338,625). The patenting activity on micro-batteries really took off over the 1998- 2002 period with the creation of pure play microbattery companies (Cymbet, Polyplus Batteries, Infinite Power Solutions, Johnson Battery Technology, Front Edge Technology) and the IP involvement of Panasonic and CEA (French Research Laboratory). A second wave of patent publications started in 2007, mainly originating from semiconductor manufacturers (Semiconductor Energy Laboratory, Sumitomo) and equipment suppliers (Applied Materials, Ulvac). Currently, more than 800 patents are granted, mainly in USA and Japan, and more than 750 patent applications are pending, mainly in Europe and USA. Overall, patent filings peaked in 2013, and seem to have been slowing down since then. Meanwhile, granted patents worldwide should increase after successful processing of the numerous pending patent applications. We believe the significant ratio of patents in force and the large number of patent applications still in the pipeline worldwide is an indication of the technology maturity heralding a future ramp-up of the microbattery market.
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