Control of Aluminum Film Properties in Electroerosion Recording Media
Original Publication Date: 1987-Apr-01
Included in the Prior Art Database: 2005-Feb-01
Electroerosion printing is a technique in which recording styli are used to erode patterns in a thin metal film (Al) in an electroerosion medium. By doing so, portions of the medium can be rendered light- transparent in an opaque background (direct negative uses), or portions of the medium can be created which will retain information (direct master uses). Two parameters are relevant in the control of the properties of the metallization layer (Al) of the direct-negative/direct-master. The first is the optical density, which is directly proportional to the mass of metal per unit area, and is in itself of primary interest for the direct negative. The second is the sheet resistivity, measured in ohm/square.