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  • Photo-etching

Photo-etching is a precise chemical processing technique in which a corrosion-resistant film is formed in a certain pattern on the metal by the photo fabrication process, then the base metal is partially etched later. This method enables complex, fine patterns of micron order to be formed, so the shape to be processed can be determined by a precise photographic image.

process of operation click
Photo-etching image

Working limit and accuracy

(1)Working plate thickness
Working plate thickness: 0.005-2.0t.
(Please inquire for other thicknesses.)
(2)Raw materials to be worked
Stainless steel, copper and copper alloy, brass, aluminum, phosphor bronze, beryllium copper, nickel, Permalloy, and others.
(3)Corner shape
Corner shape: External and internal angles are rounded when etching.
The external angle is 80% of the plate thickness.
The internal angle is 40% of the plate thickness.
Corner shape
(4)Dimensional tolerance
Since the dimensional tolerance depends on plate thickness, it is difficult to precisely determine a standard tolerance, so slight deviation is allowed. Generally, the standard tolerance is ß} 10-15% of the plate thickness. Please consult us in advance; we can meet stricter requirements for a prototype or small-lot orders.
(5)Cross section shape
Since side-etching is unavoidable, the cross section of a product is as shown in the drawing. Side-etching is within 10% of the plate thickness when both sides are etched, and within 20% when one side is etched.
Cross section shape
(6)Working limit
Minimum size D is equivalent to plate thickness, i.e., MIN/0.05 mm, while minimum size W is equivalent to half of the plate thickness, i.e., MIN/0.03 mm.
A bridge (a connection) becomes necessary when etching. This makes it necessary to fix it to a place where nothing interferes in consideration of the application of a productor post-treatment. Please notify us in advance of the place of bridge, shape, etc.