The resistive element for these resistors is approximately 1000 angstroms. Thin film resistors are made by sputtering some resistive material onto an insulating substrate (a method of vacuum deposition) and are therefore more expensive than thick film resistors. Metal film Resistor Thick Film and Thin Film Types of Resistors These resistors can be obtained in a wide range of resistance values (from a few ohms to millions of ohms). The properties like reliability, accuracy, and stability are considerably better for these resistors. These are similar to carbon-film resistors and their resistivity is controlled by the thickness of the coating layer. These resistors are made from metal oxide or small rods of ceramic-coated metal. Wire-wound Resistors Metal Film Resistors During their use, these resistors can become very hot, and for this reason, these are housed in a finned metal case. These resistors are the oldest type of resistors having excellent properties like high power ratings and low resistive values. These wire-wound resistors are commonly a length of wires usually made of an alloy such as nickel-chromium or copper-nickel manganese alloy. These resistors vary in physical appearance and size. There are different types of resistors available in the market with diverse ratings and sizes.
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