US 12,460,312 B2
Wet treatment apparatus and method of manufacturing flexible printed circuit board
Kousuke Miura, Osaka (JP); Koji Nitta, Osaka (JP); and Shoichiro Sakai, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP); and SUMITOMO ELECTRIC PRINTED CIRCUITS, INC., Shiga (JP)
Appl. No. 18/286,999
Filed by SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP); and SUMITOMO ELECTRIC PRINTED CIRCUITS, INC., Shiga (JP)
PCT Filed Apr. 13, 2022, PCT No. PCT/JP2022/017679
§ 371(c)(1), (2) Date Oct. 14, 2023,
PCT Pub. No. WO2022/224886, PCT Pub. Date Oct. 27, 2022.
Claims priority of application No. 2021-072460 (JP), filed on Apr. 22, 2021.
Prior Publication US 2024/0200220 A1, Jun. 20, 2024
Int. Cl. C25D 7/06 (2006.01); C25D 17/00 (2006.01); H05K 3/00 (2006.01); H05K 3/18 (2006.01)
CPC C25D 7/06 (2013.01) [C25D 17/00 (2013.01); H05K 3/0085 (2013.01); H05K 3/18 (2013.01); H05K 2203/0723 (2013.01); H05K 2203/1545 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A wet treatment apparatus configured to treat a continuously moving sheet-shaped workpiece, the wet treatment apparatus comprising:
a wet treatment tank including a side surface portion having a first slit, the first slit extending in a height direction in such a manner as to allow the workpiece to pass through the first slit;
a pair of rolls located outside the wet treatment tank, the pair of rolls being spaced apart from the first slit and being arranged in such a manner as to nip the workpiece in a transverse direction; and
a pair of treatment-liquid shield members disposed on a side opposite to a side on which the wet treatment tank is disposed with the pair of rolls interposed between the pair of treatment-liquid shield members and the wet treatment tank in a movement direction of the workpiece,
wherein the side surface portion includes a first side surface portion and a second side surface portion with the first slit formed between the first side surface portion and the second side surface portion,
wherein the pair of treatment-liquid shield members include a first shield member and a second shield member, and the first shield member and the second shield member are arranged in such a manner as to allow the workpiece to pass between the first shield member and the second shield member,
wherein the pair of rolls include a first roll located between the first shield member and the first side surface portion and a second roll located between the second shield member and the second side surface portion, and
wherein, in a direction parallel to a width of the first slit, a width of the first shield member is larger than a width of the first roll, and a width of the second shield member is larger than a width of the second roll,
wherein a distance between the first side surface portion and the first roll in the movement direction of the workpiece and a distance between the second side surface portion and the second roll in the movement direction of the workpiece are each larger than the width of the first slit.