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:
Mar. 07, 2017
Filed:
Sep. 10, 2015
Subtron Technology Co., Ltd., Hsinchu County, TW;
Chin-Sheng Wang, Hsinchu County, TW;
Ching-Sheng Chen, Hsinchu County, TW;
Mei-Chin Chang, Hsinchu County, TW;
Ching-Ta Chen, Hsinchu County, TW;
Subtron Technology Co., Ltd., Hsinchu County, TW;
Abstract
A circuit board includes a substrate, a patterned copper layer, a phosphorous-containing electroless plating palladium layer, an electroless plating palladium layer and an immersion plating gold layer. The patterned copper layer is disposed on the substrate. The phosphorous-containing electroless plating palladium layer is disposed on the patterned copper layer, wherein in the phosphorous-containing electroless plating palladium layer, a weight percentage of phosphorous is in a range from 4% to 6%, and a weight percentage of palladium is in a range from 94% to 96%. The electroless plating palladium layer is disposed on the phosphorous-containing electroless plating palladium layer, wherein in the electroless plating palladium layer, a weight percentage of palladium is 99% or more. The immersion plating gold layer is disposed on the electroless plating palladium layer.