Electrical contact termination for a flexible circuit

摘要

A method is provided for fabricating a flexible circuit having at least one raised bump associated with a contact pad. A sacrificial conductive mandrel is provided having a depression located to correspond with each raised bump contact. A conductive metal pattern is electroformed on selected portions of the sacrificial conductive mandrel, corresponding to a desired electrical lead pattern and the contact pad. A non-conductive polymeric sheet is applied as a base material for the flexible circuit, and laminated to the sacrificial conductive mandrel on the face having the conductive metal pattern thereon. An etchant, capable of removing the sacrificial conductive mandrel without etching or removing metal of the conductive metal pattern, is employed to remove the sacrificial conductive mandrel from the polymeric sheet to which the mandrel and the conductive metal pattern are laminated.