Process for fabricating flex circuits and product thereby

Details Process for fabricating flex circuits and product thereby Process for fabricating flex circuits and product thereby

1996-12-10

1998-09-01

Achutamurthy, Ponnathapura

Etching a substrate: processes

Forming or treating electrical conductor article

Forming or treating resistive material

216 41, 216 44, 216 54, 216 78, 216 17, 430313, 430318, 430311, 174254, 174262, 174261, B44C 122, C23F 100, H05K 100

Patent

active

058007237

ABSTRACT:
A process (200) for fabricating a flex circuit (708, 806, 812, 818 or 824) using a fabrication process without the use of a photomask includes the steps of generating (412) an electronic image (702 or 802) of circuit traces (704 or 804) representing at least a single-sided flex circuit, and selectively thermal transferring (506 or 606) a resin to either a conductively clad or non-conductive flexible substrate (304) under the control of the electronic image (702 or 802) to form either an etch resist or a conductor which defines the circuit traces (704 or 804). The conductively clad flexible substrate (304) is etched to form the circuit traces (704 or 804) of the flex circuit defined by the etch resist, after which the etch resist is removed.

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