The plates may be actual metal plates of various shapes but are most often in the form of metal foil or a metal film deposited on the insulating material.
(The plates; may be; actual metal plates of various shapes) (The plates; are; T:most often; in the form of metal foil or a metal film) (a metal film; deposited; on the insulating material)
The plates The plates a metal film
may be are deposited
actual metal plates of various shapes
T:most often in the form of metal foil or a metal film
on the insulating material