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US 6,888,242 B2Granted
Color contacts for a semiconductor package
AssigneeAmkor Technology, Inc.
InventorsSang Hyun Ryu, Chan Yeok Park, Ji Young Chung
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AssigneeAmkor Technology, Inc.
InventorsSang Hyun Ryu, Chan Yeok Park, Ji Young Chung
Estimating the term…
The surface of a solder ball and a conductive wire for a semiconductor package are coated with a predetermined colorant. Various colorants may be used according to the diameter and metal composition of the solder ball and the conductive wire. The colorant is formed by mixing organic compound and dye of a predetermined color. Examples of organic compounds excellent in physicochemical bonding with metal include benzotriazole, alkylimidazole and benzimidazole. The solder ball is fabricated by coating an organic compound of a predetermined color on the surface of a typical solder ball. The conductive wire is fabricated by coating an organic compound of a predetermined color on a general conductive wire between heat process and winding. Moreover, the solder ball is evaporated in a reflowing step after bumped via flux and the conductive wire is evaporated in a wire bonding step so that the solder ball and the conductive wire return to their unique colors.
A solder ball for a semiconductor package, which is coupled to a substrate via flux and reflow process, wherein a surface of the solder ball is colored by a colorant containing organic compound and dye according to at least one of size and metal composition.
A contact for a semiconductor package, comprising a metallic component, wherein an outer surface of the metallic component is colored by a colorant.
A contact for a semiconductor package comprising a metallic component, wherein an outer surface of the metallic component is colored by a colorant according to size and metal composition, the colorant physicochemically bonds to the metallic component and volatilizes during a reflow process.
A contact for a semiconductor package, comprising a metallic component, wherein an outer surface of the metallic component is coated by means for coloring the outer surface.
Dependencies are inferred from the claim text.