MEC 431 Lecture Notes - Lecture 27: Stainless Steel, Printed Circuit Board, John Wiley & Sons
8 Jan 2018
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Silk screen masking stencil onto surface areas that are not to be etched: maskant applied by (cid:498)silk screening(cid:499) methods, maskant is painted through a silk or stainless steel mesh containing, applications: Between other two masking methods fabrication of printed circuit: factors in selection of etchant: Depth and rate of material removal surface finish requirements: etchant must also be matched with the type of maskant to insure that maskant material is not chemically attacked boards. 43 of chemical attack is directed into surface. 2016-11-08 (1) clean raw part, (2) apply maskant, (3) scribe, cut, and peel maskant from areas to be etched, (4) etch, and (5) remove maskant and clean finished part. Chemical milling: used to remove pockets of material, in order to reduce weight, often used in the aircraft industry, where certain alloys are hard to machine. Section 10: reverse engineering read textbook 4th ed: 42. 6.
