US 11,658,534 B2
Coil substrate, motor coil substrate, and motor
Haruhiko Morita, Ogaki (JP); Hitoshi Miwa, Ogaki (JP); Shinobu Kato, Ogaki (JP); Toshihiko Yokomaku, Ogaki (JP); Hisashi Kato, Ogaki (JP); Takahisa Hirasawa, Ogaki (JP); Tetsuya Muraki, Ogaki (JP); and Takayuki Furuno, Ogaki (JP)
Assigned to IBIDEN CO., LTD., Ogaki (JP)
Filed by IBIDEN CO., LTD., Gifu (JP)
Filed on Oct. 14, 2021, as Appl. No. 17/450,856.
Claims priority of application No. JP2020-174710 (JP), filed on Oct. 16, 2020.
Prior Publication US 2022/0123616 A1, Apr. 21, 2022
Int. Cl. H02K 3/26 (2006.01)
CPC H02K 3/26 (2013.01) [H02K 2203/03 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A coil substrate, comprising:
a flexible substrate having a first end and a second end on an opposite side with respect to the first end;
a first coil formed on a first surface of the flexible substrate such that the first coil has a center space and a first wiring surrounding the center space; and
an second coil formed on a second surface of the flexible substrate on an opposite side with respect to the first surface such that the second coil has a center space and a second wiring surrounding the center space and is positioned directly below the first coil,
wherein each of the first and second wirings of the first and second coils has an outer end and an inner end such that each of the first and second wirings is formed in a spiral shape between the outer end and the inner end, the first coil is formed such that a number of turns in the first coil is greater than a number of turns in the second coil and that a width of the first wiring forming the first coil is substantially constant from the outer end to the inner end, and the second coil is formed such that a width of the second wiring forming the second coil is not constant from the outer end to the inner end.