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:
Feb. 12, 2013
Filed:
Jan. 22, 2010
Tomokazu Ito, Tokyo, JP;
Yasuhiro Hirobe, Tokyo, JP;
Atsushi Hitomi, Tokyo, JP;
Yuji Terada, Tokyo, JP;
Kensaku Asakura, Tokyo, JP;
Takeshi Urano, Tokyo, JP;
Tomokazu Ito, Tokyo, JP;
Yasuhiro Hirobe, Tokyo, JP;
Atsushi Hitomi, Tokyo, JP;
Yuji Terada, Tokyo, JP;
Kensaku Asakura, Tokyo, JP;
Takeshi Urano, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A composite electronic device includes first and second magnetic substrates, and a functional layer sandwiched between these magnetic substrates, and the functional layer is configured by a common-mode filter layer and a ESD protection element layer. An electrostatic capacitance of the ESD protection elements is equal to or lower than 0.35 pF. The common-mode filter layer includes a first spiral conductor formed on an insulation layer, and a second spiral conductor formed on an insulation layer. DC resistance of a common mode filter is equal to or higher than 0.5Ω and equal to or lower than 5Ω, and an electrostatic capacitance of the ESD protection elements is equal to or lower than 0.35 pF. A width W and a length L of the first and second spiral conductors satisfy a relational equation expressed by √(L/W)<(7.6651−fc)/0.1385.