| 摘要 |
PROBLEM TO BE SOLVED: To form a different identification mark without using many pattern formation versions to form identification marks, when forming an identification mark on a printed board. SOLUTION: A printed board 5 having a conductor layer 2 and a resist layer 3 is formed through the first step of forming a pattern to make an identification mark on the conductor layer 2 and the second step of forming a pattern to make an identification mark on the resist layer 3. In the first step, a pattern having patterns 2a and 2b is formed on the conductor layer 2. In the second step, a pattern having patterns 3a, 3b, 3c and 3d is formed on the resist layer 3. The patterns 2a and 3a and the patterns 2b and 3c constitute one identification mark to identify this printed board 5. The patterns 3b and 3d are also formed on the resist layer 3. The patterns 3b and 3d are formed as patterns to constitute other identification marks. COPYRIGHT: (C)2005,JPO&NCIPI
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