Chip-type noise filter, manufacturing method thereof, and...

Active solid-state devices (e.g. – transistors – solid-state diode – Integrated circuit structure with electrically isolated... – Passive components in ics

Reexamination Certificate

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C257S532000

Reexamination Certificate

active

07145217

ABSTRACT:
In a chip-type noise filter having a signal line of a conductor and a magnetic body disposed so as to adhere to the signal line, the magnetic body is a sintered body containing mainly Fe2O3and containing NiO in the rest. This enables to effectively absorb and damp noise of quasi-millimeter wave and millimeter wave, and even if used at the inside of semiconductor package, no outgassing occurs at the time of temperature rise in the assembly process and operating conditions thereof, thereby permitting improvement of the characteristics of the semiconductor package, along with high reliability.

REFERENCES:
patent: 5220298 (1993-06-01), Nagase
patent: 5453242 (1995-09-01), Knoess
patent: 6483413 (2002-11-01), Maeda et al.
patent: 2002/0017628 (2002-02-01), Akimoto et al.
patent: 2000-021640 (2000-01-01), None
patent: 2002-171104 (2002-06-01), None
Sung, Hsiao-Miin; Chen, Chi-Jen; Wang, Lih-Jiun; Ko, Wen-Song; The Characteristics of Low Temperature Co-Fired Multilayer Chip LC Filters; Jul. 1998; IEEE Transactions on Magnetics, vol. 34, No. 4, pp. 1363-1365.

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