I have a question/discussion topic. I have few PCBs made with planar transformer windings. It looks like one of the boards has internal shorted winding. 6 mils Cu-Cu spacing 2 mils thick Cu; how hard is it to manufacture? The board house agreed to do some cutting to see if it is internal short. How to check other boards? The winding inductance tolerance (core Al tolerance) is 3%. I know what the inductance should be (let's say for160uH How would shorted turn manifest itself?
- posted
14 years ago