A valve device and a method directly inject gaseous fuel into a combustion chamber. An emitter portion of the substrate is adapted to mount emitters. The sample is optionally oriented to optimize further processing. Thereafter, after substantial cooling of the substrate and during assembly of the vacuum IG unit, a secondary heating is performed to form a hermetic edgeperipheral seal using at least the first seal portion may be applied in certain embodiments before the secondary heating step). The second pole includes a thin inner layer of high Bsat material, the remainder being constructed of a magnetic material capable of being electroplated, such as a Ni\u2014Fe alloy.