Aim products inc, usa, manufactures no clean solder pastes for smt applications, supplied by agate & agate marketing resources. Formula 291 ax is a mildly activated resin paste specifically formulated to be left on the board without cleaning. The residues have undergone testing to guarantee high insulating resistance. Residues are clear and dry tack-hard. Aim solder paste is a homogeneous mixture of pre-alloyed powder, liquid flux and gelling agent. Each formulation of paste is made for specific type of manufacturing operation. In the most common manufacturing operations like infrared reflow, vapour phase reflow, screening or dispensing, aim uses its own equipment to preset recommended process controls good. Aim solder paste undergoes the most stringent quality control and end product testing in the industry to assure reliability, and conforms federal specification qqs 571. Formula 291 ax exhibits exceptional life studies-no corrosion, insulation resistance, and no metallic migration, in the event, the product has to be cleaned. There are options available like solvent cleaning or aqueous cleaning. Formula 291 ax conforms ipc sf 818 class 3, bellcore trtsy000078 and boc tr tsy-4078. No need of nitrogen or special gas atmosphere for this paste. The surface insulation resistance [sir] on a 7-day test is 9.5 x 1010 ohm with a water extract resistivity of 140,000 ohm/cm. It passes the halide test on silver chromate paper and copper mirror. Formulations available are no clean, water soluble, rma and ra type flux. They are available in various alloys of silver, gold, tin, lead, indium, cadmium, bismuth and antimony. Different particle sizes and viscosity ranges are offered for ultrafine pitch printing [10 mil and less] to general printing [25 mil pitch]. The formulations come for stenciling, screen printing, dispensing, pin transfer and dip applications. They are available in standard packs of 5, 10 and 30 cc syringes, 500 and 1,000 g cartridges [with or without mixers], 250 g, 500 g, and 1,000 g plastic jars and 200 g recyclable tin tubes.
