United States Patent [19] [n] Patent Number: 4,845,452
Sasaki et al. [45] Date of Patent: Jul. 4, 1989
[54] COMPOSITE BEAD ELEMENT
[75] Inventors: Yoshinori Sasaki, Honjo; Toshihiro Kuroshima; Sumio Takahashi, both of Yuzamachi, all of Japan
[73] Assignee: TDK Corporation, Tokyo, Japan
[21] Appl. No.: 254,324
[22] Filed: Oct. 5, 1988
[30] Foreign Application Priority Data
Oct. 8, 1987 [JP] Japan 62-153344[U]
[51] Int. Q.* H01F 5/00
[52] U.S. CI 336/200
[58] Field of Search 361/302, 306 DC, 321 R,
361/400, 401; 336/200
[56] References Cited
U.S. PATENT DOCUMENTS
4,328,530 5/1982 Bajorek et al 361/401
4,342,069 7/1982 Link 361/401
4,758,808 7/1988 Sasaki et al 336/200 X
Primary Examiner—Donald A. Griffin
Attorney, Agent, or Firm—Panitch, Schwarze, Jacobs
and Nadel
[57] ABSTRACT
A composite bead element comprises a chip-like magnetic body in a shape of a nearly rectangular parellelepiped in which a recess is provided, at least one feed-through holes formed in said body and an electronic component inserted in said recess. Bead inductors are formed by conductors provided in said feedthrough holes, and said electronic component and said conductors are connected by predetermined conductors on a surface of said body.
2 Claims, 4 Drawing Sheets
