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Active Trim
Trimming of a circuit element (usually resistors) in a circuit that is electrically activated and operating to obtain a specified functional output for the circuit (see Functional Trimming)

Alumina
Aluminum oxide (Al2O3). Alumina substrates are made of formulations that are primarily (96 to 99%) alumina

Artwork
The accurately scaled configurations or patterns produced to enable the product to be made; photographic films which are created to produce working thick film screens and thin film masks.

As-Fired
Values of thick-film resistors or smoothness of ceramic substrates as they come out of the firing furnace and prior to any trimming and polishing.

Aspect Ratio
The ratio between the length of a film resistor and its width; equal to the number of squares of the resistor.

Assembly
A Film circuit to which discrete components have been attached.

Assembly Drawing
A drawing or depiction showing all the components and interconnections mounted or soldered to the film circuit in their proper position.


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