Solder elements with columnar structures and methods of making the same

Solder elements with columnar structures and methods of making the same

Elongated solder masses are formed by contacting the molten solder with the walls of holes in a dielectric layer overlying the front face of a chip element such as a wafer. The elongated solder masses have a relatively large aspect ratio, or ratio of height to maximum diameter, and thus provide a hi...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HABA BELGACEM, MCWILLIAMS BRUCE M, HUMPSTON GILES
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
CLADDING OR PLATING BY SOLDERING OR WELDING
CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
SEMICONDUCTOR DEVICES
SOLDERING OR UNSOLDERING
TRANSPORTING
WELDING
WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:Elongated solder masses are formed by contacting the molten solder with the walls of holes in a dielectric layer overlying the front face of a chip element such as a wafer. The elongated solder masses have a relatively large aspect ratio, or ratio of height to maximum diameter, and thus provide a high reliability connection with a relatively small diameter compatible with closely spaced contacts on the chip.