Method of making a surface-mount power magnetic device
AssigneeAT&T Bell Laboratories
InventorsLennart D. Pitzele, Matthew A. Wilkowski
Life of this patent
Estimating the term…
Abstract
A magnetic device (10), suitable for attachment to a substrate, includes at least one sheet winding (24) having a pair of spaced-apart terminations (26), each receiving an upwardly rising portion (28) of a lead (12). The sheet winding terminations and upwardly-rising lead portions, together with at least a portion of the sheet windings, are then encapsulated with masses of insulative material (18, 19 and 34). A ferromagnetic core (20,22) surrounds at least a portion of the sheet windings to impart a desired magnetic property to the device.
Claims5
A method of manufacturing a magnetic device for attachment to a substrate, comprising the steps of:
- placing at least one generally planar sheet winding, having a pair of spaced-apart terminations, onto a lead frame stock such that each termination receives an upwardly rising portion of a separate lead integral with the lead frame stock so as to make an electrical connection with the winding termination;
- encapsulating each sheet winding termination and the upwardly rising portion of each lead with a mass of insulative material;
- attaching a ferromagnetic core about a portion of each sheet winding completely separating each lead from the lead frame stock;
- and
- forming each lead for attachment to a substrate.
Dependencies are inferred from the claim text.