US 12,476,026 B2
Insulated wire and method for manufacturing insulated wire
Hajime Nishi, Tokyo (JP); Takami Ushiwata, Tokyo (JP); and Yuki Honda, Tokyo (JP)
Assigned to Proterial, Ltd., Tokyo (JP)
Filed by PROTERIAL, LTD., Tokyo (JP)
Filed on Jul. 17, 2023, as Appl. No. 18/222,578.
Claims priority of application No. 2022-117253 (JP), filed on Jul. 22, 2022.
Prior Publication US 2024/0029923 A1, Jan. 25, 2024
Int. Cl. H01B 7/02 (2006.01); H01B 13/06 (2006.01)
CPC H01B 13/065 (2013.01) [H01B 7/0225 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An insulated wire comprising:
a conductor having an elongated shape; and
an insulating coating provided around the conductor, the insulating coating being formed by laminating multiple insulating layers, each insulating layer including pores,
wherein at a specific position of the insulating coating in a longitudinal direction thereof where no protrusions with a protruding length of 100 μm or longer are formed in an outer circumferential surface of the insulating coating, when an average value of respective thicknesses of the multiple insulating layers at a thick portion of the insulating coating having the largest thickness is defined as a first thickness and an average value of respective thicknesses of the multiple insulating layers at a thin portion of the insulating coating having the smallest thickness is defined as a second thickness, a thickness difference between the first thickness and the second thickness is 0.5 μm or less, and when a thickness of the thick portion is defined as a and a thickness of the thin portion is defined as b, a value of a thickness unevenness rate obtained by (b/a)×100 is 85.4% or more.