I am experiencing major discrepancies between Nickel/Immersion gold chemistries, on contacting a number of suppliers I have three different recommendations for the Phosphorous content in Nickel as follows:- Supplier 1 - 8-10% Supplier 2 - 10-12% Supplier 3 - 12-14% I am under the impression that as the Phosphorous content increases solderability improves but ductility decreases, does anybody out there have any specific experience of problems caused by too much/too little Phosphorous content in Nickel or is the range of 8-14% an acceptable tolerance band to quote. Gary Willard (Motorola UK)