Patent ID: 7249411

Claim:
A method for mounting and retaining an electrical component on a substrate that is subjected to at least two thermal cycles, the method comprising the steps of: a) providing a substrate including a retentive through hole having a wall; b) providing an electrical component having a retentive pin extending therefrom, said retentive pin having a diameter smaller than that of said retentive through hole; c) disposing solder paste of a first solder composition into said retentive through hole; d) inserting said retentive pin into said retentive through hole; e) subjecting said substrate to a first thermal cycle such that material associated with at least one of said retentive through hole wall and said retentive pin migrates into said solder paste to create a mixed solder composition which has a higher melting point than that of said first solder composition; and f) subjecting said substrate to a second thermal cycle having a peak temperature less than the melting point of said mixed solder composition, whereby said retentive pin remains securely held in said retentive through hole.