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US 7,879,269 B1Granted
Ferrite powder optimized for fabrication of ferrite features and related methods
AssigneeRF Micro Devices, Inc.
InventorsDavid C. Dening, John Bernard Ings, Peters Valdemars Erins
Life of this patent
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Abstract
The present invention pertains to a method for manufacturing a ferrite powder for use in making PCB ferrite features. The ferrite powder is easily applied and provides a high ferrite-packing factor. The ferrite powder is a mixture of varying sizes of ferrite particles, an epoxy powder, and curing agent powder.
Claims16
A method for manufacturing coarse ferrite particles and finer ferrite particles to be used in making a ferrite powder, comprising:
- providing various sized ferrite particles;
- selecting ones of the various sized ferrite particles below a predetermined approximate size as relatively coarse ferrite particles;
- grinding ones of the various sized ferrite particles above the predetermined approximate size to create relatively finer ferrite particles;
- and
- mixing the relatively course ferrite particles, the relatively finer ferrite particles, an epoxy powder, and a curing agent powder to create a ferrite powder.
2 more elements
A method comprising:
- creating a ferrite powder mixture of relatively course ferrite particles, relatively finer ferrite particles, an epoxy powder, and a curing agent powder by:
- providing sintered ferrite particles;
- selecting ones of the sintered ferrite particles below a predetermined approximate size as the relatively coarse ferrite particles;
- grinding ones of the sintered ferrite particles above the predetermined approximate size to create the relatively finer ferrite particles;
- and
- mixing one of the group consisting of the epoxy powder and a mixture of the epoxy powder and the curing agent powder with the relatively finer ferrite particles during the grinding of the sintered ferrite particles above a predetermined size;
- pressing the ferrite powder mixture into a mold;
- and
- heating the powder mixture to cure to create a ferrite element.
6 more elements
Dependencies are inferred from the claim text.