Generally, a slot, through its slot group, corresponds to a carrier location within a wafer carrier. A slot group, in general, corresponds to a carrier, containing the same number of slots as there are carrier locations in the corresponding carrier. Also see slot. Also see dirt . The two metals to be joined do not melt but may either show slight surface alloying with the solder or, in the case of plated components, the plating may become alloyed into the solder.
Examples are isopropyl alcohol, methyl alcohol, and xylene.
The residue either is left by the solvent itself or is material that the solvent has removed from the surface and redeposited.