Hydrogen fuel cell stacks have been produced commercially since the 1960s, mainly for military and space exploration tasks. Handmade, delicate and expensive, the mass production problem has been a major inhibitor to the widespread adoption of fuel cells as a mass-market power source. U.K.-based Bramble Energy has developed a manufacturing technique for hydrogen fuel cell stacks that uses an existing and well-optimized technology in the electronics industry: printed circuit manufacturing. * * *Want to watch this podcast as a video? This Week in Engineering is available on engineering.com TV along with all of our other shows such as End of the Line, Designing the Future, Manufacturing the Future, and the Engineering Roundtable.