Patent ID: 7968458
Filing Date: 2011-06-28
Classification: H01L,H05K,Y10T

Abstract:
1. A production process for making an electronic circuit substrate, comprising: a patterning step of forming a respectively anodically oxidizable conductor pattern and distribution pattern connected to said conductor pattern on a substrate; and an anodic oxidation step of contacting an electrolyte solution with said conductor pattern and said distribution pattern and carrying out anodic oxidation while applying current thereto, said patterns serving as anodes, to generate an oxide film from said conductor pattern and said distribution pattern so that the oxide film has a first width, wherein an insulator portion is formed, in the anodic oxidation step, so that the insulator portion has a second width for interrupting a conduction path of the distribution pattern by oxidizing said distribution pattern, and the second width of said insulator portion is larger but not more than twice the first width of said oxide film.