Complex sentence: Thermosonic bonding improved the reliability of the earlier processes by preheating the lead wire and metallized chip prior to introducing the ultrasonic cycle, which eliminated cracking of the fragile and costly silicon chip.
Split into simpler sentences: Thermosonic bonding improved the reliability of the earlier processes by preheating the lead wire and metallized chip prior to introducing the ultrasonic cycle. It resulted in eliminating the incidences of cracking of the fragile and costly silicon chip.