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:
Jun. 02, 2009
Filed:
May. 25, 2006
Wei-cheng Lien, Taipei, TW;
Cheng-tsung Kuo, Taipei County, TW;
Jun-nun Lin, Zhubei, TW;
Jie-an Zhu, Taipei, TW;
Li-yun Zhang, Shanghai, CN;
Wei-Cheng Lien, Taipei, TW;
Cheng-Tsung Kuo, Taipei County, TW;
Jun-Nun Lin, Zhubei, TW;
Jie-An Zhu, Taipei, TW;
Li-Yun Zhang, Shanghai, CN;
SFI Electronics Technology Inc., Taoyuan County, TW;
Abstract
A multilayer zinc oxide varistor without bismuth oxide system ingredients, and having variable breakdown voltages by controlling the thickness of the ceramic material; the varistor is bismuth-free and composed of zinc oxide as the primary constituent with alkaline earth element (Ba) as first additive, at least one of transition elements of Mn, Co, Cr, or Ni as second additives, at least one of rare earth elements of Pr, La, Ce, Nd or Tb as third additives and at least one of B, Si, Se, Al, Ti, W, Sn, Sb, Na, or K as rest additives, and the bismuth-free and zinc oxide based varistor exhibits an excellent ESD (Electro-Static Discharge) withstanding characteristic.