Wiring circuit board and producing method thereof

A wiring circuit board comprising:

• an alignment mark layer and
• an insulating layer disposed at one side and the other side in a thickness direction of the alignment mark layer, wherein
• the alignment mark layer includes
• a first alignment mark exposed from the insulating layer toward one side in the thickness direction and
• a second alignment mark exposed from the insulating layer toward the other side in the thickness direction, and
• the first alignment mark and the second alignment mark satisfy the following condition A or condition B.
• Condition A:
• The first alignment mark has a first portion which is at least one portion selected from the group consisting of a first starting point portion extending in a plurality of directions in a direction perpendicular to the thickness direction, and a first center of gravity portion of a solid portion continuous in the direction perpendicular to the thickness direction.
• The second alignment mark has a second portion which is at least one portion selected from the group consisting of a second starting point portion extending in a plurality of directions in a direction perpendicular to the thickness direction, and a second center of gravity portion of a solid portion continuous in the direction perpendicular to the thickness direction.
• The first portion is deviated from the second portion by an amount of L when viewed from the top, and a deviation amount L and the maximum length Z of the wiring circuit board satisfy the following formula.
• Z/100,000≤L≤Z×⅔
• Condition B:
• The first alignment mark has the first portion, and the second alignment mark does not have the second portion,
• or the first alignment mark does not have the first portion, and the second alignment mark does not have the second portion.
• The shortest distance L between the first alignment mark and the second alignment mark when viewed from the top, and the maximum length Z of the wiring circuit board satisfy the following formula.
• Z/100,000≤L≤Z×⅔