Ratner & Prestia
Resistor having moisture resistant layer
 A resistor comprising a substrate typically made of aluminum, a pair of top electrode layers made of a thin noble metal film disposed on both ends of the top face of the substrate, and a resistance layer of a thin metal film made of Ni system or Cr system disposed on the top face of the substrate so as to electrically connect with the top electrode layer. The moisture absorbency of a protective layer is reduced to upgrade sealing of the resistance layer by covering the resistance layer with two resin layers: a first protective layer made of polyimide resin and a second protective layer made of epoxy resin, which have different water vapor permeability, to improve the reliability, particularly the moisture resistance characteristics, of the resistor. 
Matsushita Electric Industrial Co., Ltd.
H H H
H01C H01C H01C
inventional inventional inventional
Mitsunari Hiroyuki
Nakatani Yamada