Patent ID: 6170155
Filing Date: 2001-01-09
Classification: B81C,H01L,H05K,Y02P,Y10T

Abstract:
System of components to be hybridized comprising at least one first component (110) with first hybridization ball reception pads (114a) and with a first coefficient of thermal expansion (.alpha..sub.1) and at least one second component (112) with second hybridization ball reception pads (114b) and with a second coefficient of thermal expansion (.alpha..sub.2) different from said first coefficient of thermal expansion (.alpha..sub.1), the first and second pads being associated in pairs to form pairs of pads, wherein at a hybridization temperature (Th) the first and second pads (114a, 114b) in each pair of pads are approximately superposable, and at ambient temperature (Ta), the pads (114a, 114b) occupy a position such that when the second component (112) is placed above the first component (110), the first and second pads (114a, 11b) in each pair of pads are mutually offset along a direction connecting the pads in the pair of pads, by a distance compensating a differential expansion of the first and second components (110, 112) between the ambient temperature (Ta) and the hybridization temperature (Th), said differential expansion being due to the difference between said first and second coefficients of thermal expansion.