Patent ID: 6727587
Filing Date: 2004-04-27
Classification: H01L

Abstract:
A connection device for at least one of mechanically and electrically connecting at least one circuitry unit of a circuitry device with at least one contact device and to thereby thermo-mechanically uncouple the circuitry unit and the contact device, the connection device comprising:a preformed section of at least one of the group consisting of a metallic section and an alloy section, said preformed section having: a buffer region including silver; an intermediate region including a silver-tin alloy; and a connection region including an intermetallic substrate of at least one of: tin; silver; a metal able to form an intermetallic compound with at least one of tin and silver; and a metal material able to form an intermetallic compound with at least one of tin and silver; and said preformed section disposed at one of the group consisting of the circuitry unit and the contact device.