PurposeThe purpose of this paper is to investigate the effects of H2 flow rate
on improving the solder wettability of oxidized‐copper with liquid lead‐free
solder (96.5Sn‐3Ag‐0.5Cu) by Ar‐H2 plasmas. The aim was to improve the solder
wettability of oxidized copper from 0 per cent wetting of copper oxidized in air
at 260oC for 1 hour to 100 per cent wetting of oxidized‐copper modified by Ar‐H2
plas... hiện toàn bộ
PurposeThe purpose of this paper is to present a novel approach on the process
zone characterization for direct feedback regarding the state of vapour, in
order to assure a better monitoring, control and understanding of the
process.Design/methodology/approachDifferent pressure sensors were applied in an
experimental vapour phase soldering (VPS) station, where the hardware setup was
dedicated to t... hiện toàn bộ
PurposeThe purpose of this paper is to assess the effect of different
temperature cycling profiles on the reliability of lead‐free 388 plastic ball
grid array (PBGA) packages and to deeply understand crack initiation and
propagation.Design/methodology/approachTemperature cycling of Sn‐3.8Ag‐0.7Cu
PBGA packages was carried out at two temperature profiles, the first ranging
between −55°C and 100°C (... hiện toàn bộ