Solder joint structure and solder joining method
AssigneeNidec Corporation
InventorTomoyoshi Yokogawa
Life of this patent
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Abstract
A solder joint structure includes a metal pin in the shape of a prism or a circular or substantially circular cylinder; an aluminum wire including a wound portion wound around the metal pin; and a solder layer arranged to join the metal pin and at least one portion of the wound portion to each other. The at least one portion of the wound portion includes a deformed surface resulting from a partial disappearance or elimination of the aluminum wire in a cross-section perpendicular or substantially perpendicular to a direction in which the aluminum wire extends, and the solder layer is directly and closely adhered to the deformed surface.
Claims23
A solder joint structure comprising:
- a metal pin in a shape of a prism or a circular or substantially circular cylinder;
- an aluminum wire including a wound portion wound around the metal pin;
- and
- a solder layer arranged to join the metal pin and at least one portion of the wound portion to each other;
- wherein
- the at least one portion of the wound portion includes a deformed surface resulting from a partial elimination of the aluminum wire in a cross-section perpendicular or substantially perpendicular to a direction in which the aluminum wire extends, and the solder layer is directly adhered to the deformed surface.
A solder joining method comprising the steps of:
- a) winding an aluminum wire around a metal pin in a shape of a prism or a circular or substantially circular cylinder to define a wound portion;
- and
- b) defining a solder layer to join the metal pin and at least one portion of the wound portion to each other through soldering with application of an ultrasonic wave;
- wherein
- the step b) causes, in the at least one portion of the wound portion, a portion of the aluminum wire to disappear or be eliminated in a cross-section perpendicular or substantially perpendicular to a direction in which the aluminum wire extends.
Dependencies are inferred from the claim text.