The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 19, 2006
Filed:
Feb. 15, 2002
Fred C. Hiatt, Lakeville, MN (US);
John E. Decramer, Marshall, MN (US);
Robert T. Fayfield, St. Louis Park, MN (US);
Richard J. Rassel, Essex Junction, VT (US);
Fred C. Hiatt, Lakeville, MN (US);
John E. DeCramer, Marshall, MN (US);
Robert T. Fayfield, St. Louis Park, MN (US);
Richard J. Rassel, Essex Junction, VT (US);
BH Electronics, Burnsville, MN (US);
Abstract
An ultra-miniature magnetic device generally comprises a conductive winding and a magnetic core. The conductive winding includes an upper conductor and a lower conductor. The magnetic core is of an elongate rectangular or oval shape having two elongate sections and two short sections. The lower conductor is preferably positioned below the elongate sections of the magnetic core while the upper conductor is preferably positioned above the elongate sections of the magnetic core. The lower and upper conductors are electrically connected by conducting via structures that are formed in sequential steps using semiconductor processing technology. The result is a coil winding around the elongate sections, with the short sections being preferably free of windings. The process provides an advantage of avoiding shorting between the via structures and the magnetic core caused by overetching when etching the via holes.