Surface-mount inductor and manufacturing method thereof
AssigneeMurata Manufacturing Co., Ltd.
InventorKeita Muneuchi
Life of this patent
Estimating the term…
Abstract
A surface-mount inductor comprises a molded body containing a metal magnetic powder; at least one coil buried in the molded body such that lead-out end parts at both ends of the coil are at least partially exposed on a surface of the molded body; and an external terminal formed over an exposed surface of each of the lead-out end parts. A metal magnetic powder exposed portion is formed at least around the exposed surface. The external terminal at least includes a first plating layer formed over the metal magnetic powder exposed portion and the exposed surface of the lead-out end part, and a conductive paste layer formed on the first plating layer and made of a solidified conductive paste. Consequently, the surface mount inductor comprises an external terminal having high connection reliability.
Claims9
A surface-mount inductor comprising:
- a molded body containing a metal magnetic powder;
- at least one coil buried in the molded body such that lead-out end parts at both ends of the coil are at least partially exposed on a surface of the molded body;
- and
- an external terminal formed over an exposed surface of each of the lead-out end parts and a metal magnetic powder exposed portion formed at least around the exposed surface, the external terminal at least including a first plating layer formed over the metal magnetic powder exposed portion and the exposed surface of the lead-out end part, and a conductive paste layer formed on the first plating layer and made of a solidified conductive paste,
- wherein the external terminal includes the first plating layer, the conductive paste layer, and
- a second plating layer formed on the conductive paste layer,
- the conductive paste layer has one or more conductive-paste-layer non-formation regions, and
- the first plating layer and the second plating layer are directly bonded in the conductive-paste-layer non-formation regions.
Dependencies are inferred from the claim text.