A heat spreading material is integrated into a composite die structure including a first IC die having a first dielectric material and a first electrical interconnect structure, and a second IC die having a second dielectric material and a second electrical interconnect structure. The composite die structure may include a composite electrical interconnect structure comprising the first interconnect structure in direct contact with the second interconnect structure at a bond interface. The heat spreading material may be within at least a portion of a dielectric area through which the bond interface extends. The heat spreading material may be located within one or more dielectric materials surrounding the composite interconnect structure, and direct a flow of heat generated by one or more of the first and second IC dies.

A heat spreading material is integrated into a composite die structure including a first IC die having a first dielectric material and a first electrical interconnect structure, and a second IC die having a second dielectric material and a second electrical interconnect structure. The composite die structure may include a composite electrical interconnect structure comprising the first interconnect structure in direct contact with the second interconnect structure at a bond interface. The heat spreading material may be within at least a portion of a dielectric area through which the bond interface extends. The heat spreading material may be located within one or more dielectric materials surrounding the composite interconnect structure, and direct a flow of heat generated by one or more of the first and second IC dies.

Disclosed is a semiconductor device including a conductive pattern on a substrate, a passivation layer on the substrate and including an opening that partially exposes the conductive pattern, and a pad structure in the opening of the passivation layer and connected to the conductive pattern. The pad structure includes a first metal layer that fills the opening of the passivation layer and has a width greater than that of the opening, and a second metal layer on the first metal layer. The first metal layer has a first thickness at an outer wall of the first metal layer, a second thickness on a top surface of the passivation layer, and a third thickness on a top surface of the conductive pattern. The second thickness is greater than the first thickness, and the third thickness is greater than the second thickness.

Disclosed is a semiconductor device including a conductive pattern on a substrate, a passivation layer on the substrate and including an opening that partially exposes the conductive pattern, and a pad structure in the opening of the passivation layer and connected to the conductive pattern. The pad structure includes a first metal layer that fills the opening of the passivation layer and has a width greater than that of the opening, and a second metal layer on the first metal layer. The first metal layer has a first thickness at an outer wall of the first metal layer, a second thickness on a top surface of the passivation layer, and a third thickness on a top surface of the conductive pattern. The second thickness is greater than the first thickness, and the third thickness is greater than the second thickness.

A semiconductor structure includes a first passivation layer disposed over a metal line, a copper-containing RDL disposed over the first passivation layer, where the copper-containing RDL is electrically coupled to the metal line and where a portion of the copper-containing RDL in contact with a top surface of the first passivation layer forms an acute angle, and a second passivation layer disposed over the copper-containing RDL, where an interface between the second passivation layer and a top surface of the copper-containing RDL is curved. The semiconductor structure may further include a polymeric layer disposed over the second passivation layer, where a portion of the polymeric layer extends to contact the copper-containing RDL, a bump electrically coupled to the copper-containing RDL, and a solder layer disposed over the bump.

A semiconductor structure includes a first passivation layer disposed over a metal line, a copper-containing RDL disposed over the first passivation layer, where the copper-containing RDL is electrically coupled to the metal line and where a portion of the copper-containing RDL in contact with a top surface of the first passivation layer forms an acute angle, and a second passivation layer disposed over the copper-containing RDL, where an interface between the second passivation layer and a top surface of the copper-containing RDL is curved. The semiconductor structure may further include a polymeric layer disposed over the second passivation layer, where a portion of the polymeric layer extends to contact the copper-containing RDL, a bump electrically coupled to the copper-containing RDL, and a solder layer disposed over the bump.

In a layered bonding material 10, a coefficient of linear expansion of a base material 11 is 5.5 to 15.5 ppm/K and a first surface and a second surface of the base material 11 are coated with pieces of lead-free solder 12a and 12b.

In a layered bonding material 10, a coefficient of linear expansion of a base material 11 is 5.5 to 15.5 ppm/K and a first surface and a second surface of the base material 11 are coated with pieces of lead-free solder 12a and 12b.

A semiconductor device includes an interlayer insulating layer disposed on a substrate; a plurality of middle interconnections disposed in the interlayer insulating layer; a pad disposed on the interlayer insulating layer; an upper interconnection disposed on the interlayer insulating layer; a protective insulating layer covering an edge of the pad, the upper interconnection, and a horizontal gap between the pad and the upper interconnection, the protective insulating layer having an opening on the pad; and a bump disposed on the pad, the bump extending on the protective insulating layer and overlapping the upper interconnection from a top-down view. At least one of the plurality of middle interconnections from among middle interconnections vertically closest to the pad has a first vertical thickness, the pad has a second vertical thickness that is twice to 100 times the first vertical thickness, a length of the gap between the pad and the upper interconnection is 1 μm or more, and an upper surface of the protective insulating layer is planar.

A semiconductor device includes an interlayer insulating layer disposed on a substrate; a plurality of middle interconnections disposed in the interlayer insulating layer; a pad disposed on the interlayer insulating layer; an upper interconnection disposed on the interlayer insulating layer; a protective insulating layer covering an edge of the pad, the upper interconnection, and a horizontal gap between the pad and the upper interconnection, the protective insulating layer having an opening on the pad; and a bump disposed on the pad, the bump extending on the protective insulating layer and overlapping the upper interconnection from a top-down view. At least one of the plurality of middle interconnections from among middle interconnections vertically closest to the pad has a first vertical thickness, the pad has a second vertical thickness that is twice to 100 times the first vertical thickness, a length of the gap between the pad and the upper interconnection is 1 μm or more, and an upper surface of the protective insulating layer is planar.