Production Facilities for Multi-Turn Metal-Film Trimmer Resistors Per Signal Corps Technical Requirements Scs-127 Dated 9 February, 1962 and MIL-R-22097b (Modified)

摘要

Analytical methods were developed for all but one ingredient in the bath from which the film is deposited. Analytical procedures for evaluation of the deposited film were developed and are ready for use during subsequent work requiring analysis of the effects of film application variables. A piece of equipmen was designed and made for analysis of wear characteristics of the film. Some study of the wear resistance was performed. Baths were run with newly available controls and an improved consistency of results obtained. Because methods for analyzing all ingredients of the bath are not yet available, it has not been possible to have complete control over the deposition of the film. Baths have been run omitting the ingredients for which the analytical methods were not available. These baths proved to be impractical for production usage. Fundamental studies were made on the heat treating of the film. Various methods of terminating were evaluated and the method previously in use remains the best. Further studies of film variation as a result of the method of termination indicates that the variations previously suspected could not in fact be attributed to the method of termination. (Author)