Importance

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Abstract

An etching device capable of forming a uniform etchant film. The etching device is disposed on a plurality of parallel and coplanar hollow sheet-type rollers used to support a double-sided board. A plurality of first etchant nozzles is disposed under the hollow sheet-type rollers. The device has several solid rollers, several rows of second etchant nozzles and several rows of air nozzles. The solid rollers are coplanarly disposed over the hollow sheet-type rollers and are parallel to each other. The adjacent solid rollers comprise an interval, and the intervals are divided into several first intervals and several second intervals. The solid rollers touch the double-sided board to make an etchant film covering the double-sided board more uniform. The rows of second etchant nozzles are disposed over the first intervals and parallel to axes of the solid rollers. The rows of air nozzles are disposed over the second intervals and parallel to the axes of the solid rollers.

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First Claim