TRESKY soldering de formic acid vapor a wɔde ka nitrogen (HCOOH + N2) ho di dwuma, a ɛma mfaso wɔ optoelectronics ne photonics nhyiam ne nkitahodi mfiridwuma mu. Formic acid brɛ oxides ase wɔ ɔkwan a wotumi de ho to so na eyi flux fi hɔ koraa. Formic acid a wɔde di dwuma nso hwɛ hu sɛ asase ani so yɛ nwini yiye, na ɛma tebea horow a ɛfata ma welding akwan a ɛyɛ den. Saa module yi na wɔde di dwuma ma eutectic soldering ne thermocompression welding, sɛ nhwɛso no, wɔde indium. Nneɛma a wɔde bom no nyinaa de nitrogen-enriched formic acid (HCOOH) a wɔde nea wɔfrɛ no bubbler di dwuma na edi dwuma. Wɔde nitrogen vapor ne formic acid afrafra kɔ aduruyɛ dan no mu wɔ ɔkwan a wɔahyɛ so na woyi fi mu.