Contact Resistance Characteristics of Elastomeric Complex Structure Contacts for Gold and Tin Printed Circuit Board
Characteristics of conductive elastomer which is composed of silicone rubber and dispersed carbon black particles shows conductive and elastic properties in one simple material. This material has been widely applied to contacts of switches and connectors of a liquid crystal panels. However, since surface state of the contact is very soft, it is difficult to remove contaminant films of contaminated opposite side contact surface and to obtain low contact resistance owing to break the film. This study has been conducted to clear structures of the elastomer which indicates removal characteristics for contaminant films and low contact resistance. As specimens, six different types of the elastomer contacts composed by different type of dispersed such materials as carbon and metal fibers, metal mesh, and plated surfaces were used. The opposite contacts were Au and Sn plated contact surface on a printed circuit board (PCB). The elastomeric contacts contained hard materials showed lower contact resistance than only dispersed carbon particles in the elastomer matrix for both contaminated PCB contact surfaces.
Ellipsometric analysis for growth of Ag2S film and effect of oil film on corrosion resistance of Ag contact surface
By applying ellipsometric analysis, the relationship between the growth of Ag/sub 2/S film and exposure to a H/sub 2/S gas environment was clarified with respect to the contact resistance and formation of the film. Parameters for corrosion kinetics were deduced that are concerned with the growth laws of Ag/sub 2/S film. Furthermore, the effects of oil films on the corrosion resistance of an Ag surface were examined. Stearic acid was used as the oil specimen. The influence of the thickness of the oil film on the contact resistance property was studied for a clean Ag surface and for the surface exposed to an H/sub 2/S gas environment. The optimum thickness for the oil film to sustain low contact resistance was found.<<ETX>>
Unity Identity Text Self
Abstract Understanding the receptivity of literature, how one work admits many readers, begins with an analogy: unity is to text as identity is to self. Unity here means the way all a text’s features can be related through one central theme. Identity describes a person’s sameness within different behaviors as variations on one identity theme (Lichtenstein). To find unity or identity, however, the interpreter himself plays a behavioral variation on his identity theme. In interpreting, his identity re-creates itself as he shapes the text to match his characteristic defenses, fantasies, and coherences. Thus, what a poet says about fictional, political, or scientific texts expresses the same identity theme as the poems he writes. To understand reading, criticism, and any knowing or making in symbols, then, we need to let go the Cartesian craving for objectivity and accept the themes in ourselves with which we construe the world—including literary works.