Wired circuit board and producing method thereof
First Claim
Patent Images
1. A wired circuit board, comprising:
- a metal supporting layer;
an insulating layer formed on the metal supporting layer; and
a conductive layer formed on the insulating layer, whereina reference hole for positioning is formed in the metal supporting layer, anda stepped portion is formed so as to surround the reference hole.
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Accused Products
Abstract
A wired circuit board includes a metal supporting layer, an insulating layer formed on the metal supporting layer, and a conductive layer formed on the insulating layer. In the metal supporting layer, a reference hole for positioning is formed, and a stepped portion is formed so as to surround the reference hole.
13 Citations
8 Claims
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1. A wired circuit board, comprising:
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a metal supporting layer; an insulating layer formed on the metal supporting layer; and a conductive layer formed on the insulating layer, wherein a reference hole for positioning is formed in the metal supporting layer, and a stepped portion is formed so as to surround the reference hole. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A producing method of a wired circuit board, comprising:
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the step of forming a metal supporting layer, forming an insulating layer on the metal supporting layer, and forming a conductive layer on the insulating layer; the step of forming a stepped portion such that a to-be-removed region for boring a reference hole used for positioning is surrounded thereby; and a reference hole forming step of etching the to-be-removed region of the metal supporting layer to form the reference hole, wherein the reference hole forming step includes the steps of; forming an etching resist so as to cover the stepped portion therewith on one side of the metal supporting layer in a thickness direction and expose the to-be-removed region on the other side of the metal supporting layer in the thickness direction; removing the to-be-removed region exposed from the etching resist by etching; and removing the etching resist.
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Specification