RESISTOR TRIMMING 

 

For System Integration and Shop Service: Laser Resistor Trimming of Thick- and Thin-Film Hybrid Microelectronic Devices

ACTIVE AND PASSIVE

Large board thick film resistor trimming is a specialty of Laserod. Board sizes to 24″ x 24″ or 36″ x 24″ are easily handled. Upon job completion, Laserod will provide you with Excel graphs that indicate your initial and final trim values for your comparison.
Laser Trimming Hybrid Microwave Boards
Fig. 1. 16″ x 12″ large microwave circuit board is trimmed by YAG laser..
The precision equipment delivers a trim accuracy as high as 0.1%, a measuring accuracy of 100 ppm, and a range between 0.1 ohm to 1 Gigohm.

PASSIVE TRIMMING

Involves removal of material from a resistor to increase its resistance. The resistance or voltage parameter is monitored across the component contacts.

ACTIVE TRIMMING

Involves removal of material from a resistor to change a circuit parameter. Also called functional trimming, because the circuit is functioning during the trimming process. Parameters monitored are ACV, DCV, ACI, DCI, PERIOD, FREQUENCY.

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