Patent · US Expired

High-frequency transformer

US4959630A · kind A · utility

21Cited by
7References
34Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 7, 1989
Grant dateSep 25, 1990
Priority date
Expiry dateAug 7, 2009

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH05K1/16
  • WIPO fieldElectrical machinery, apparatus, energy
  • WIPO sectorElectrical engineering

Abstract

A high-frequency transformer is constructed from a flexible circuit comprising a primary conductive film winding and one or more secondary conductive film windings disposed on a single dielectric membrane. The flexible circuit is folded to form a stack of primary winding layers interleaved with secondary winding layers and then inserted into a magnetic cup core. The flexible circuit is preferably patterned photolithographically.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.