Patent ID: 9576818
Date: 2017-02-21
CPC Classifications: C09G,C09K,H01L

Claim:
1. A polishing composition for polishing Co or a Co containing substrate, the composition comprising an abrasive; at least one Co complexor; ammonia; and bicarbonate; wherein the polishing composition has a pH of 9 or more, and the Co complexor comprises at least one selected from a group of 2-Aminoethylphosphonic acid (AEPn), Dimethyl methylphosphonate (DMMP), Tetramethylenediamine tetra(methylene phosphonic acid) (TDTMP), N-(phosphonomethyl)iminodiacetic acid (PMIDA), 2-carboxyethyl phosphonic acid (CEPA), 2-Hydroxyphosphonocarboxylic acid (HPAA), N,N-bis(phosphonomethyl)glycine (glyphosine) (PMG), Iminodimethylenephosphonic acid (IDMP), 2-hydroxyphosphonoacetic acid (HPAA), and amino tri(methylenephosphonic acid) (ATMP) or a salt of each thereof.