Patent ID: 11859119
Assignee: FUJIFILM CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H  B  Y | IPC B  C  H

Claim 17:
18. The method for treating an object to be treated according to claim 17, comprising:
a step A of bringing the object to be treated containing the first metal-containing substance and a second metal-containing substance which is a material different from the first metal-containing substance and contains a metal into contact with the chemical liquid so that the first metal-containing substance is dissolved; and
a step B of bringing the object to be treated into contact with a solution selected from the group consisting of a mixed aqueous solution of ammonia and aqueous hydrogen peroxide, a mixed aqueous solution of hydrofluoric acid and aqueous hydrogen peroxide, a mixed aqueous solution of sulfuric acid and aqueous hydrogen peroxide, and a mixed aqueous solution of hydrochloric acid and aqueous hydrogen peroxide before or after the step A so that the second metal-containing substance is dissolved.