Arco has set the industry standard for dipped silvered mica and is now the most widely used mica capacitor in the world. New levels of reliability, ruggedness, and electrical excellence have been attained in the design of the product. The distinct improvements in performance afforded by Arco capacitors have resulted in their wholesale adoption and used by the electronics industry for both military and commercial applications. All Arco dipped micas not only meet but far exceed the latest revision of MIL-C-5.

CONSTRUCTION
Depending upon the capacitance value desired, a pre-determined number of silver mica films are stacked to form a capacitor section. Silver electrodes are applied to the mica dielectric by a screening process, and then fired in a proprietary oxidizing atmosphere to obtain a permanent bond. This method insures that the plate will always remain in the same relative physical position with the dialectic.
Contact to the silver electrodes is accomplished by foil strips which are laid so as to cover exact area. These foil contacts extend beyond the edge of the mica with each foil being extended alternately on the opposite sides of the silvered mica. This joining is accomplished by the precise folding of the foil contacts over the section.
The section is then compressed, and clinched tightly in a hot tinned lead and clamp assembly to assure positive contact. Once this has been accomplished, the entire assembly becomes known as an "insert" and is ready for dipping.
For protection, the "inserts" are encased with a number of coats of mineral-filled phenol compound and then are vacuum impregnated with an epoxy resin. The result is a rugged coating which protects the capacitor against shock, vibration, and humidity. The standard encapsulation process consists of four coats.
A variation of the multi-coat is the Arco Single-Coat Dipped Mica, the SCDM. This unit was developed to meet critical size requirements without sacrificing any of the inherent qualities of mica.

Type SCDM more than meets all of the electrical and environmental requirements of RS-153 and MIL-C-5D. It is available in case styles DM10 and DM15 in the same capacitances, tolerances, voltages, characteristics, and temperature ranges as the standard multi-dip DM.