초록 ▼

An electrical device (1) in which an element (7) composed of a conductive polymer is positioned in contact with the surface layer of one or more metal electrodes (3,5). The metal electrode contains a base layer (9) which comprises a first metal, an intermediate metal layer (15) which comprises a met

An electrical device (1) in which an element (7) composed of a conductive polymer is positioned in contact with the surface layer of one or more metal electrodes (3,5). The metal electrode contains a base layer (9) which comprises a first metal, an intermediate metal layer (15) which comprises a metal that is different from the first metal, and a surface layer (17) which (i) comprises a second metal, (ii) has a center line average roughness R.sub.a of at least 1.3, and (iii) has a reflection density R.sub.d of at least 0.60. The conductive polymer composition preferably exhibits PTC behavior. The electrical devices, which may be, for example, circuit protection devices or heaters, have improved thermal and electrical performance over devices prepared with electrodes which do not meet the center line average roughness and reflection density requirements.

대표청구항 ▼

[ what is claimed is:] [1.] An electrical device (1) which comprises(A) an element (7) composed of a conductive polymer; and(B) at least one metal foil electrode (3) which(1) comprises(a) a base layer (9) which (i) comprises a first metal, and (ii) has been prepared by rolling,(b) an intermediate me

[ what is claimed is:] [1.] An electrical device (1) which comprises(A) an element (7) composed of a conductive polymer; and(B) at least one metal foil electrode (3) which(1) comprises(a) a base layer (9) which (i) comprises a first metal, and (ii) has been prepared by rolling,(b) an intermediate metal layer (15) which (i) is positioned between the base layer (9) and a surface layer (17), and (ii) comprises a metal which is different from the first metal, and(c) a surface layer (17) which (i) consists essentially of a second metal, (ii) has a center line average roughness R.sub.a of at least 1.6, and (iii) has a reflection density R.sub.d of at least 0.81, and(2) is positioned so that the surface layer (17) is in direct physical contact with the conductive polymer element (7).