There is no big secret. PCB manufacturing is changing now more than ever before in its long history. Initially, it involved through-hole assembly and manufacturing with the most notable Intel 8086 motherboard. Later, through-hole and surface mount technology (SMT) began merging and sustained a long product cycle.
But today, PCB manufacturing is rapidly evolving to include SMT as well as microelectronics, such as chip-on-board (CoB) installation, flip-chip assembly, wire bonding, and die attach. SMT merged with microelectronics is also known as hybrid manufacturing. This is occurring because PCBs have begun shrinking at a faster pace in recent years due to the introduction of wearables (i.e., medical, commercial, and aerospace industries), IoT devices, and portables demanding smaller circuit boards.
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