Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


한국표면공학회지 (22권2호 47-54)

A Study of Intermetallic Compound Growth in the Sn/Cu and Sn/Ni Couples (II) : Sheet Resistance and Solderability Changes

Sn/Cu 및 Sn/Ni 계면에서 금속간화합물 형성 및 성장에 관한 연구(II)


고려대학교 금속공학과;
고려대학교 금속공학과;


The effects of intermetallic compound growt on the sheet resistance and soldreability as functions of the aging time, the temperature, and the conditions of substrates have been investi-gated in the electroplallic compound (mainy Cu6Sn5and Ni3Sn4) and the number of phase interface increased, the sheet resistance increased. Spread tests showed that the solderability was dereased with the intermetallic compounds growth and increased with the thickness of electroplated Sn. The surface morphology or agin size of the compound layer singificantly affect the solderability. The solderability of Sn/Ni system was superiot to Sn/Ni system was sperior to that of Sn/Cu system and the intermetallic compounds growth was solwer in the former system.