Chemical mechanical polishing for improved contrast resolution

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United States of America Patent

PATENT NO 9982351
SERIAL NO

15420237

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Abstract

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An aluminum alloy article having improved surface contrast and an associated method are provided. The method includes grinding a surface of the article, diamond polishing the surface of the article, and removing α-aluminum matrix material from the surface by fine polishing the surface with a suspension containing colloidal silica and a caustic substance, wherein the caustic substance has a higher pH value than the pH value of colloidal silica.

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Patent Owner(s)

  • GM GLOBAL TECHNOLOGY OPERATIONS LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Rabe, Adam P Auburn Hills, US 2 0

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