Patent ID: 11887882
Assignee: C.UYEMURA & CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B  C | IPC B  H

Claim 0:
1. A holding jig for holding a planar workpiece and immersing the planar workpiece in a liquid bath in a plating solution of a container, the holding jig comprising:
a rear member; and
a front member that faces the rear member and has an opening portion,
wherein the rear and front members are arranged so that the planar workpiece is disposed between the rear member and the front member,
the planar workpiece has a first surface facing the front member and a second surface facing the rear member,
the opening portion of the front member faces the first surface of the planar workpiece,
the rear member, the front member, and the planar workpiece are to be immersed in the plating solution, and
the first surface of the planar workpiece is partially exposed through the opening portion, wherein the rear member has a plurality of projections formed on a surface of the rear member facing the front member, and
top surfaces of the plurality of projections contact the second surface of the planar workpiece;
wherein the projections have an average height of 1 to 3 mm in a cross section of a thickness direction of the rear member;
wherein a total area of the top surfaces of the projections is between 10% to 40% of an area of the opening portion.