| 摘要 |
<p>A pressure transducer includes a base ply (12), a resistance ply (14) disposed on the base ply and at least two spaced apart contacts (26, 28) juxtaposed in relation to the resistance ply whereby at least one of the contacts may be pressed against the surface of the resistance ply. The resistance ply is made by spraying or silk screening a mixture of resin (18) resistive to electrical conduction and a conductive particulate (16) and then curing the composition to form a thin resistance ply having a surface with a multiplicity of micro-protrusions (34) formed by the conductive particulate. The ratio of conductive particulate to resin is such that the mean distance (21) between microprotrusions is greater than about five times the size of the conductive particles (16). The particles are in the range of about .5 to 10 microns and the resin layer is about .4 to .8 microns thick.</p> |
