Patent ID: 6504105
Filing Date: 2003-01-07
Classification: B23K,H01L,H05K,Y02P,Y10T

Abstract:
An interconnect structure for connection to a surface with corresponding contacts, comprising:a first substrate; a planer pattern of multiple, metal contacts, on said first substrate for interconnecting said first substrate, to a second substrate having a surface with corresponding contacts; a plurality of elongated conductive metal spacers having sides and first and second spaced end portions and made of a material other than a solder in which a plurality of the spacers have two substantially spherical ends positioned for confronting respective contacts of the first substrate and on the surface of the second substrate and the width of the contacts are between 60 and 150% of the width of the respective spacers, adjacent, and in a self-supporting centering relationship with, and extending above each metal contact on said first substrate for maintaining a minimum space between said first substrate and said second substrate; and a volume of a solder material located substantially only between and not along said sides thereof, each respective metal contact on said first substrate and said end portion of the respective metal spacer made of a material other than a solder for that metal contact, with a melting temperature of the solder material substantially less than the melting temperature of said metal spacer made of a material other than a solder, the smallest cross-sectional area of the solder material volumes having a minimum diameter of at least about &frac23; of the diameter of said metal spacer made of a material other than a solder.