What is the lead frame material of the Plastic Quad-Flat Packages (PQFP)?
The lead frame material is copper for all PQFP packages and PLCC plastic packages, including Thin QFP (TQ and VQ), Heat-enhanced QFP (HQ), Plastic DIP (PD), Small Outline IC (SO), etc.
For ceramic packages, the lead frame is made of Kovar.
MQ and PQ packages use copper lead frame; this is not restricted to Cu 7025. Other types of copper are also used, including EFTEC 64T, CDA194, CD151, etc.