Electricity: measuring and testing – Determining nonelectric properties by measuring electric... – Particle counting
Reexamination Certificate
2007-07-03
2007-07-03
Hirshfeld, Andrew H. (Department: 2858)
Electricity: measuring and testing
Determining nonelectric properties by measuring electric...
Particle counting
C204S22400M, C204S242000, C205S645000, C205S674000
Reexamination Certificate
active
11078592
ABSTRACT:
Embodiments of the present invention include a method for quantitatively detecting embedded particles of a disk spacer ring comprising. The method includes dissolving a layer of a disk spacer ring into a liquid solution, the disk spacer ring layer comprising embedded particles. The method further includes filtering the solution to capture the embedded particles. The method further includes counting the particles.
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Ang Kor Seng Kelvin
Liu Shaoyong
Marimuthu Sivalingam
Yao Yi Zhao
Zhang Jingjing
Hirshfeld Andrew H.
Hitachi Global Storage Technologies - Netherlands B.V.
Zhu John
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