公开(公告)号：US10703947B2

公开(公告)日：2020-07-07

申请号：US15970353

申请日：2018-05-03

Applicant: HITACHI CHEMICAL COMPANY, LTD.

Inventor： Tomohiro Iwano ,  Hirotaka Akimoto ,  Takenori Narita ,  Tadahiro Kimura ,  Daisuke Ryuzaki

IPC: C09K3/14 ,  B24B37/04 ,  H01L21/3105 ,  C09G1/02

Abstract: The slurry of the invention comprises abrasive grains and water, wherein the abrasive grains include tetravalent cerium hydroxide particles and produce light transmittance of at least 50%/cm for light with a wavelength of 500 nm in an aqueous dispersion with the content of the abrasive grains adjusted to 1.0 mass %. The polishing liquid of the invention comprises abrasive grains, an additive and water, wherein the abrasive grains include tetravalent cerium hydroxide particles and produce light transmittance of at least 50%/cm for light with a wavelength of 500 nm in an aqueous dispersion with the content of the abrasive grains adjusted to 1.0 mass %.

公开(公告)号：US20170267895A9

公开(公告)日：2017-09-21

申请号：US14799971

申请日：2015-07-15

Applicant: HITACHI CHEMICAL COMPANY, LTD.

Inventor： Takashi Shinoda ,  Shigeru Nobe ,  Takafumi Sakurada ,  Yoshikazu Oomori ,  Tadahiro Kimura

IPC: C09G1/02 ,  H01L21/768 ,  H01L21/3105 ,  H01L21/321

CPC classification number: C09G1/02 ,  C23F3/04 ,  H01L21/30625 ,  H01L21/31055 ,  H01L21/3212 ,  H01L21/32125 ,  H01L21/7684 ,  H01L21/76865

Abstract: The invention provides polishing slurry for CMP for suppressing corrosion of wiring lines of a conductive substance, or for suppressing bimetallic corrosion of a barrier conductor and conductive substance, by suppressing electrons from being transferred at near the boundaries between a barrier conductor and a conductive substance such as copper. The invention provides polishing slurry for CMP for polishing at least a conductor layer and a conductive substance layer in contact with the conductor layer, wherein the absolute value of the potential difference between the conductive substance and the conductor at 50±5° C. is 0.25 V or less in the polishing slurry when a positive electrode and a negative electrode of a potentiometer are connected to the conductive substance and the conductor, respectively. The polishing slurry for CMP preferably comprises at least one compound selected from heterocyclic compounds containing any one of hydroxyl group, carbonyl group, carboxyl group, amino group, amide group and sulfinyl group, and containing at least one of nitrogen and sulfur atoms.

公开(公告)号：US20150315419A1

公开(公告)日：2015-11-05

申请号：US14799971

申请日：2015-07-15

Applicant: HITACHI CHEMICAL COMPANY, LTD.

Inventor： Takashi Shinoda ,  Shigeru Nobe ,  Takafumi Sakurada ,  Yoshikazu Oomori ,  Tadahiro Kimura

IPC: C09G1/02 ,  H01L21/768 ,  H01L21/3105 ,  H01L21/321

CPC classification number: C09G1/02 ,  C23F3/04 ,  H01L21/30625 ,  H01L21/31055 ,  H01L21/3212 ,  H01L21/32125 ,  H01L21/7684 ,  H01L21/76865

Abstract: The invention provides polishing slurry for CMP for suppressing corrosion of wiring lines of a conductive substance, or for suppressing bimetallic corrosion of a barrier conductor and conductive substance, by suppressing electrons from being transferred at near the boundaries between a barrier conductor and a conductive substance such as copper. The invention provides polishing slurry for CMP for polishing at least a conductor layer and a conductive substance layer in contact with the conductor layer, wherein the absolute value of the potential difference between the conductive substance and the conductor at 50±5° C. is 0.25 V or less in the polishing slurry when a positive electrode and a negative electrode of a potentiometer are connected to the conductive substance and the conductor, respectively. The polishing slurry for CMP preferably comprises at least one compound selected from heterocyclic compounds containing any one of hydroxyl group, carbonyl group, carboxyl group, amino group, amide group and sulfinyl group, and containing at least one of nitrogen and sulfur atoms.

Abstract translation: 本发明提供了通过抑制电子在阻挡导体和导电物质之间的边界附近转移而抑制导电物质的布线的腐蚀或抑制阻挡导体和导电物质的双金属腐蚀的CMP抛光浆料，例如 作为铜。 本发明提供了用于CMP的抛光浆料，用于至少对与导体层接触的导体层和导电物质层进行抛光，其中在50±5℃下导电物质与导体之间的电位差的绝对值为0.25 当电位计的正电极和负电极分别连接到导电物质和导体时，抛光浆料中的V或更小。 用于CMP的抛光浆料优选包含至少一种选自含有羟基，羰基，羧基，氨基，酰胺基和亚磺酰基中的任何一种的杂环化合物并且含有氮和硫原子中的至少一个的化合物。